/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/reducercommutativity/max40-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-16 02:19:26,440 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-16 02:19:26,444 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-16 02:19:26,491 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-16 02:19:26,492 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-16 02:19:26,494 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-16 02:19:26,495 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-16 02:19:26,498 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-16 02:19:26,500 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-16 02:19:26,501 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-16 02:19:26,502 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-16 02:19:26,503 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-16 02:19:26,504 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-16 02:19:26,505 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-16 02:19:26,506 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-16 02:19:26,508 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-16 02:19:26,509 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-16 02:19:26,510 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-16 02:19:26,512 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-16 02:19:26,514 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-16 02:19:26,516 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-16 02:19:26,520 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-16 02:19:26,521 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-16 02:19:26,523 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-16 02:19:26,527 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-16 02:19:26,538 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-16 02:19:26,539 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-16 02:19:26,540 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-16 02:19:26,541 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-16 02:19:26,569 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-16 02:19:26,570 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-16 02:19:26,570 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-16 02:19:26,571 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-16 02:19:26,571 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-16 02:19:26,572 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-16 02:19:26,573 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-16 02:19:26,573 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-16 02:19:26,573 INFO L138 SettingsManager]: * Use SBE=true [2022-10-16 02:19:26,574 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-16 02:19:26,574 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-16 02:19:26,574 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-16 02:19:26,575 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-16 02:19:26,575 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-16 02:19:26,575 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-16 02:19:26,576 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-16 02:19:26,576 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-16 02:19:26,576 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-16 02:19:26,576 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-16 02:19:26,577 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-16 02:19:26,577 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-16 02:19:26,577 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-16 02:19:26,578 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-16 02:19:26,578 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-16 02:19:26,578 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-16 02:19:26,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 02:19:26,579 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-16 02:19:26,579 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-16 02:19:26,580 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-16 02:19:26,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-16 02:19:26,580 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-16 02:19:27,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-16 02:19:27,080 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-16 02:19:27,083 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-16 02:19:27,084 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-16 02:19:27,085 INFO L275 PluginConnector]: CDTParser initialized [2022-10-16 02:19:27,087 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/max40-1.i [2022-10-16 02:19:27,157 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd9546507/70a1e1d2f914419dadf00a1ed49b0fca/FLAGff3934bcc [2022-10-16 02:19:27,694 INFO L306 CDTParser]: Found 1 translation units. [2022-10-16 02:19:27,695 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/max40-1.i [2022-10-16 02:19:27,708 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd9546507/70a1e1d2f914419dadf00a1ed49b0fca/FLAGff3934bcc [2022-10-16 02:19:28,051 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd9546507/70a1e1d2f914419dadf00a1ed49b0fca [2022-10-16 02:19:28,056 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-16 02:19:28,065 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-16 02:19:28,067 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-16 02:19:28,067 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-16 02:19:28,072 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-16 02:19:28,073 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:19:28" (1/1) ... [2022-10-16 02:19:28,075 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d1eb7a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:28, skipping insertion in model container [2022-10-16 02:19:28,075 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:19:28" (1/1) ... [2022-10-16 02:19:28,084 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-16 02:19:28,106 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-16 02:19:28,302 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/reducercommutativity/max40-1.i[1290,1303] [2022-10-16 02:19:28,318 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 02:19:28,334 INFO L203 MainTranslator]: Completed pre-run [2022-10-16 02:19:28,385 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/reducercommutativity/max40-1.i[1290,1303] [2022-10-16 02:19:28,386 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 02:19:28,413 INFO L208 MainTranslator]: Completed translation [2022-10-16 02:19:28,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:28 WrapperNode [2022-10-16 02:19:28,417 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-16 02:19:28,419 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-16 02:19:28,420 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-16 02:19:28,420 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-16 02:19:28,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:28" (1/1) ... [2022-10-16 02:19:28,457 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:28" (1/1) ... [2022-10-16 02:19:28,500 INFO L138 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-10-16 02:19:28,501 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-16 02:19:28,507 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-16 02:19:28,507 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-16 02:19:28,508 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-16 02:19:28,521 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:28" (1/1) ... [2022-10-16 02:19:28,521 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:28" (1/1) ... [2022-10-16 02:19:28,526 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:28" (1/1) ... [2022-10-16 02:19:28,527 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:28" (1/1) ... [2022-10-16 02:19:28,554 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:28" (1/1) ... [2022-10-16 02:19:28,561 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:28" (1/1) ... [2022-10-16 02:19:28,563 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:28" (1/1) ... [2022-10-16 02:19:28,566 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:28" (1/1) ... [2022-10-16 02:19:28,580 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-16 02:19:28,582 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-16 02:19:28,582 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-16 02:19:28,582 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-16 02:19:28,584 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:28" (1/1) ... [2022-10-16 02:19:28,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 02:19:28,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:19:28,634 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-16 02:19:28,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-16 02:19:28,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-16 02:19:28,736 INFO L130 BoogieDeclarations]: Found specification of procedure max [2022-10-16 02:19:28,737 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2022-10-16 02:19:28,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-16 02:19:28,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-16 02:19:28,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-16 02:19:28,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-16 02:19:28,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-16 02:19:28,738 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-16 02:19:28,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-16 02:19:28,822 INFO L235 CfgBuilder]: Building ICFG [2022-10-16 02:19:28,825 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-16 02:19:29,183 INFO L276 CfgBuilder]: Performing block encoding [2022-10-16 02:19:29,193 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-16 02:19:29,194 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-10-16 02:19:29,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:19:29 BoogieIcfgContainer [2022-10-16 02:19:29,198 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-16 02:19:29,238 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-16 02:19:29,238 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-16 02:19:29,242 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-16 02:19:29,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:19:28" (1/3) ... [2022-10-16 02:19:29,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5150889b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:19:29, skipping insertion in model container [2022-10-16 02:19:29,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:19:28" (2/3) ... [2022-10-16 02:19:29,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5150889b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:19:29, skipping insertion in model container [2022-10-16 02:19:29,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:19:29" (3/3) ... [2022-10-16 02:19:29,246 INFO L112 eAbstractionObserver]: Analyzing ICFG max40-1.i [2022-10-16 02:19:29,271 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-16 02:19:29,272 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2022-10-16 02:19:29,390 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-16 02:19:29,408 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;@c813907, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-16 02:19:29,409 INFO L358 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2022-10-16 02:19:29,433 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 62 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:19:29,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-16 02:19:29,448 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:19:29,449 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-16 02:19:29,451 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:19:29,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:19:29,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1849285, now seen corresponding path program 1 times [2022-10-16 02:19:29,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:19:29,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265926237] [2022-10-16 02:19:29,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:29,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:19:29,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:29,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 02:19:29,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:19:29,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265926237] [2022-10-16 02:19:29,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265926237] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 02:19:29,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 02:19:29,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 02:19:29,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499704196] [2022-10-16 02:19:29,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 02:19:29,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 02:19:29,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:19:29,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 02:19:29,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 02:19:29,837 INFO L87 Difference]: Start difference. First operand has 67 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 62 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) 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) [2022-10-16 02:19:29,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:19:29,928 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2022-10-16 02:19:29,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 02:19:29,931 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 [2022-10-16 02:19:29,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:19:29,940 INFO L225 Difference]: With dead ends: 58 [2022-10-16 02:19:29,941 INFO L226 Difference]: Without dead ends: 56 [2022-10-16 02:19:29,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 02:19:29,948 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 34 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 02:19:29,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 57 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 02:19:29,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-10-16 02:19:29,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-10-16 02:19:29,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 51 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:19:29,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2022-10-16 02:19:29,998 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 4 [2022-10-16 02:19:29,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:19:29,998 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2022-10-16 02:19:29,999 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) [2022-10-16 02:19:29,999 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2022-10-16 02:19:29,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-16 02:19:30,000 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:19:30,000 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-16 02:19:30,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-16 02:19:30,001 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:19:30,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:19:30,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1849286, now seen corresponding path program 1 times [2022-10-16 02:19:30,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:19:30,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385598111] [2022-10-16 02:19:30,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:30,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:19:30,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:30,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 02:19:30,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:19:30,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385598111] [2022-10-16 02:19:30,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385598111] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 02:19:30,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 02:19:30,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 02:19:30,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909057744] [2022-10-16 02:19:30,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 02:19:30,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 02:19:30,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:19:30,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 02:19:30,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 02:19:30,221 INFO L87 Difference]: Start difference. First operand 56 states and 61 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) [2022-10-16 02:19:30,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:19:30,294 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2022-10-16 02:19:30,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 02:19:30,295 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 [2022-10-16 02:19:30,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:19:30,296 INFO L225 Difference]: With dead ends: 60 [2022-10-16 02:19:30,296 INFO L226 Difference]: Without dead ends: 60 [2022-10-16 02:19:30,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 02:19:30,299 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 2 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 02:19:30,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 88 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 02:19:30,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-10-16 02:19:30,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2022-10-16 02:19:30,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 53 states have internal predecessors, (57), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:19:30,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2022-10-16 02:19:30,311 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 4 [2022-10-16 02:19:30,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:19:30,312 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2022-10-16 02:19:30,312 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) [2022-10-16 02:19:30,312 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2022-10-16 02:19:30,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-16 02:19:30,313 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:19:30,313 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-10-16 02:19:30,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-16 02:19:30,314 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:19:30,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:19:30,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1543018551, now seen corresponding path program 1 times [2022-10-16 02:19:30,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:19:30,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145770106] [2022-10-16 02:19:30,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:30,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:19:30,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:30,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 02:19:30,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:19:30,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145770106] [2022-10-16 02:19:30,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145770106] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:19:30,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364198185] [2022-10-16 02:19:30,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:30,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:19:30,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:19:30,592 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:19:30,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-16 02:19:30,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:30,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-16 02:19:30,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:19:30,851 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-16 02:19:30,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 02:19:30,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 02:19:31,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 02:19:31,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364198185] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 02:19:31,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 02:19:31,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2022-10-16 02:19:31,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871766270] [2022-10-16 02:19:31,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 02:19:31,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-16 02:19:31,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:19:31,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-16 02:19:31,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-10-16 02:19:31,034 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:19:31,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:19:31,263 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2022-10-16 02:19:31,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-16 02:19:31,263 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-10-16 02:19:31,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:19:31,265 INFO L225 Difference]: With dead ends: 62 [2022-10-16 02:19:31,265 INFO L226 Difference]: Without dead ends: 62 [2022-10-16 02:19:31,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-10-16 02:19:31,268 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 38 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 02:19:31,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 164 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 02:19:31,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-10-16 02:19:31,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-10-16 02:19:31,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 50 states have (on average 1.22) internal successors, (61), 57 states have internal predecessors, (61), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:19:31,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2022-10-16 02:19:31,279 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 8 [2022-10-16 02:19:31,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:19:31,280 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2022-10-16 02:19:31,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:19:31,280 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2022-10-16 02:19:31,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-10-16 02:19:31,281 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:19:31,281 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:19:31,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-16 02:19:31,482 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 [2022-10-16 02:19:31,483 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:19:31,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:19:31,485 INFO L85 PathProgramCache]: Analyzing trace with hash 802905803, now seen corresponding path program 1 times [2022-10-16 02:19:31,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:19:31,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777329461] [2022-10-16 02:19:31,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:31,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:19:31,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:31,672 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-16 02:19:31,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:19:31,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777329461] [2022-10-16 02:19:31,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777329461] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 02:19:31,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 02:19:31,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 02:19:31,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463771439] [2022-10-16 02:19:31,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 02:19:31,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-16 02:19:31,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:19:31,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-16 02:19:31,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-16 02:19:31,677 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:19:31,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:19:31,787 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2022-10-16 02:19:31,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-16 02:19:31,788 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-10-16 02:19:31,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:19:31,792 INFO L225 Difference]: With dead ends: 60 [2022-10-16 02:19:31,792 INFO L226 Difference]: Without dead ends: 60 [2022-10-16 02:19:31,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-16 02:19:31,805 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 49 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 02:19:31,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 75 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 02:19:31,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-10-16 02:19:31,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-10-16 02:19:31,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 50 states have (on average 1.18) internal successors, (59), 55 states have internal predecessors, (59), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:19:31,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2022-10-16 02:19:31,826 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 23 [2022-10-16 02:19:31,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:19:31,827 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2022-10-16 02:19:31,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:19:31,828 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2022-10-16 02:19:31,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-10-16 02:19:31,830 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:19:31,831 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:19:31,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-16 02:19:31,833 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:19:31,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:19:31,834 INFO L85 PathProgramCache]: Analyzing trace with hash 802905804, now seen corresponding path program 1 times [2022-10-16 02:19:31,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:19:31,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459081727] [2022-10-16 02:19:31,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:31,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:19:31,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:32,005 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 02:19:32,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:19:32,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459081727] [2022-10-16 02:19:32,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459081727] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:19:32,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792566624] [2022-10-16 02:19:32,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:32,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:19:32,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:19:32,020 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:19:32,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-16 02:19:32,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:32,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-16 02:19:32,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:19:32,142 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 02:19:32,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 02:19:32,222 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 02:19:32,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792566624] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 02:19:32,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 02:19:32,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-10-16 02:19:32,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787389117] [2022-10-16 02:19:32,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 02:19:32,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-10-16 02:19:32,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:19:32,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-10-16 02:19:32,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-10-16 02:19:32,225 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:19:32,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:19:32,285 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2022-10-16 02:19:32,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-16 02:19:32,286 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-10-16 02:19:32,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:19:32,287 INFO L225 Difference]: With dead ends: 84 [2022-10-16 02:19:32,287 INFO L226 Difference]: Without dead ends: 84 [2022-10-16 02:19:32,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-10-16 02:19:32,289 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 30 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 02:19:32,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 196 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 02:19:32,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-10-16 02:19:32,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-10-16 02:19:32,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 74 states have (on average 1.1216216216216217) internal successors, (83), 79 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:19:32,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2022-10-16 02:19:32,298 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 23 [2022-10-16 02:19:32,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:19:32,298 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2022-10-16 02:19:32,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:19:32,299 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2022-10-16 02:19:32,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-10-16 02:19:32,301 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:19:32,301 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:19:32,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-16 02:19:32,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:19:32,516 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:19:32,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:19:32,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1615740934, now seen corresponding path program 2 times [2022-10-16 02:19:32,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:19:32,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25457711] [2022-10-16 02:19:32,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:32,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:19:32,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:32,798 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 02:19:32,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:19:32,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25457711] [2022-10-16 02:19:32,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25457711] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:19:32,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161500548] [2022-10-16 02:19:32,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 02:19:32,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:19:32,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:19:32,801 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:19:32,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-16 02:19:32,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-16 02:19:32,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 02:19:32,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 15 conjunts are in the unsatisfiable core [2022-10-16 02:19:32,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:19:32,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-16 02:19:33,111 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-10-16 02:19:33,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 02:19:33,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161500548] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 02:19:33,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 02:19:33,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 16 [2022-10-16 02:19:33,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805823925] [2022-10-16 02:19:33,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 02:19:33,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-16 02:19:33,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:19:33,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-16 02:19:33,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2022-10-16 02:19:33,114 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:19:33,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:19:33,210 INFO L93 Difference]: Finished difference Result 91 states and 97 transitions. [2022-10-16 02:19:33,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-16 02:19:33,210 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-10-16 02:19:33,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:19:33,212 INFO L225 Difference]: With dead ends: 91 [2022-10-16 02:19:33,212 INFO L226 Difference]: Without dead ends: 91 [2022-10-16 02:19:33,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2022-10-16 02:19:33,214 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 50 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 02:19:33,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 80 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 02:19:33,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-10-16 02:19:33,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2022-10-16 02:19:33,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 78 states have (on average 1.1282051282051282) internal successors, (88), 83 states have internal predecessors, (88), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:19:33,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2022-10-16 02:19:33,222 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 47 [2022-10-16 02:19:33,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:19:33,223 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2022-10-16 02:19:33,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:19:33,223 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2022-10-16 02:19:33,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-10-16 02:19:33,225 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:19:33,225 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:19:33,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-16 02:19:33,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:19:33,439 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:19:33,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:19:33,440 INFO L85 PathProgramCache]: Analyzing trace with hash 484682849, now seen corresponding path program 1 times [2022-10-16 02:19:33,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:19:33,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559597794] [2022-10-16 02:19:33,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:33,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:19:33,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:33,722 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 02:19:33,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:19:33,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559597794] [2022-10-16 02:19:33,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559597794] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:19:33,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717049092] [2022-10-16 02:19:33,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:33,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:19:33,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:19:33,725 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:19:33,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-16 02:19:33,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:33,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-16 02:19:33,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:19:33,928 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 02:19:33,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 02:19:34,161 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 02:19:34,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717049092] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 02:19:34,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 02:19:34,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-10-16 02:19:34,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736641451] [2022-10-16 02:19:34,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 02:19:34,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-10-16 02:19:34,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:19:34,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-10-16 02:19:34,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-10-16 02:19:34,165 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand has 25 states, 25 states have (on average 3.88) internal successors, (97), 25 states have internal predecessors, (97), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:19:34,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:19:34,314 INFO L93 Difference]: Finished difference Result 136 states and 142 transitions. [2022-10-16 02:19:34,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-10-16 02:19:34,314 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.88) internal successors, (97), 25 states have internal predecessors, (97), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-10-16 02:19:34,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:19:34,316 INFO L225 Difference]: With dead ends: 136 [2022-10-16 02:19:34,316 INFO L226 Difference]: Without dead ends: 136 [2022-10-16 02:19:34,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-10-16 02:19:34,317 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 99 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 02:19:34,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 255 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 02:19:34,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-10-16 02:19:34,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2022-10-16 02:19:34,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 126 states have (on average 1.0793650793650793) internal successors, (136), 131 states have internal predecessors, (136), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:19:34,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 142 transitions. [2022-10-16 02:19:34,328 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 142 transitions. Word has length 52 [2022-10-16 02:19:34,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:19:34,329 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 142 transitions. [2022-10-16 02:19:34,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.88) internal successors, (97), 25 states have internal predecessors, (97), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:19:34,329 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 142 transitions. [2022-10-16 02:19:34,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-10-16 02:19:34,333 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:19:34,333 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:19:34,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-16 02:19:34,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:19:34,548 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:19:34,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:19:34,549 INFO L85 PathProgramCache]: Analyzing trace with hash -156188283, now seen corresponding path program 2 times [2022-10-16 02:19:34,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:19:34,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851818548] [2022-10-16 02:19:34,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:34,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:19:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:35,475 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 02:19:35,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:19:35,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851818548] [2022-10-16 02:19:35,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851818548] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:19:35,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433543036] [2022-10-16 02:19:35,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 02:19:35,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:19:35,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:19:35,478 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:19:35,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-16 02:19:35,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 02:19:35,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 02:19:35,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 24 conjunts are in the unsatisfiable core [2022-10-16 02:19:35,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:19:35,756 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 02:19:35,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 02:19:36,496 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 02:19:36,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433543036] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 02:19:36,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 02:19:36,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 43 [2022-10-16 02:19:36,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955255054] [2022-10-16 02:19:36,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 02:19:36,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-10-16 02:19:36,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:19:36,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-10-16 02:19:36,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2022-10-16 02:19:36,501 INFO L87 Difference]: Start difference. First operand 136 states and 142 transitions. Second operand has 43 states, 43 states have (on average 4.023255813953488) internal successors, (173), 43 states have internal predecessors, (173), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:19:36,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:19:36,701 INFO L93 Difference]: Finished difference Result 208 states and 214 transitions. [2022-10-16 02:19:36,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-10-16 02:19:36,702 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.023255813953488) internal successors, (173), 43 states have internal predecessors, (173), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2022-10-16 02:19:36,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:19:36,704 INFO L225 Difference]: With dead ends: 208 [2022-10-16 02:19:36,704 INFO L226 Difference]: Without dead ends: 208 [2022-10-16 02:19:36,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 176 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2022-10-16 02:19:36,706 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 120 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 02:19:36,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 272 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 02:19:36,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-10-16 02:19:36,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2022-10-16 02:19:36,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 198 states have (on average 1.0505050505050506) internal successors, (208), 203 states have internal predecessors, (208), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:19:36,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 214 transitions. [2022-10-16 02:19:36,720 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 214 transitions. Word has length 100 [2022-10-16 02:19:36,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:19:36,720 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 214 transitions. [2022-10-16 02:19:36,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.023255813953488) internal successors, (173), 43 states have internal predecessors, (173), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:19:36,721 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 214 transitions. [2022-10-16 02:19:36,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-10-16 02:19:36,726 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:19:36,726 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 40, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:19:36,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-16 02:19:36,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:19:36,941 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:19:36,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:19:36,942 INFO L85 PathProgramCache]: Analyzing trace with hash -315540421, now seen corresponding path program 3 times [2022-10-16 02:19:36,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:19:36,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974376340] [2022-10-16 02:19:36,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:36,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:19:37,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:37,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3162 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3160 trivial. 0 not checked. [2022-10-16 02:19:37,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:19:37,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974376340] [2022-10-16 02:19:37,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974376340] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:19:37,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064699596] [2022-10-16 02:19:37,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 02:19:37,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:19:37,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:19:37,923 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:19:37,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-16 02:19:38,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-16 02:19:38,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 02:19:38,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-16 02:19:38,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:19:38,060 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-16 02:19:38,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3162 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3160 trivial. 0 not checked. [2022-10-16 02:19:38,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 02:19:38,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064699596] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 02:19:38,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 02:19:38,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2022-10-16 02:19:38,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101595741] [2022-10-16 02:19:38,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 02:19:38,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-16 02:19:38,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:19:38,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-16 02:19:38,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-10-16 02:19:38,713 INFO L87 Difference]: Start difference. First operand 208 states and 214 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:19:38,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:19:38,825 INFO L93 Difference]: Finished difference Result 209 states and 215 transitions. [2022-10-16 02:19:38,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-16 02:19:38,826 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 172 [2022-10-16 02:19:38,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:19:38,829 INFO L225 Difference]: With dead ends: 209 [2022-10-16 02:19:38,829 INFO L226 Difference]: Without dead ends: 209 [2022-10-16 02:19:38,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-10-16 02:19:38,833 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 50 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 02:19:38,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 90 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 02:19:38,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-10-16 02:19:38,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 203. [2022-10-16 02:19:38,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 195 states have (on average 1.035897435897436) internal successors, (202), 198 states have internal predecessors, (202), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:19:38,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 208 transitions. [2022-10-16 02:19:38,854 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 208 transitions. Word has length 172 [2022-10-16 02:19:38,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:19:38,856 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 208 transitions. [2022-10-16 02:19:38,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 02:19:38,860 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 208 transitions. [2022-10-16 02:19:38,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-10-16 02:19:38,869 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:19:38,870 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 40, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:19:38,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-16 02:19:39,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:19:39,071 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:19:39,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:19:39,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1088549844, now seen corresponding path program 1 times [2022-10-16 02:19:39,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:19:39,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750957019] [2022-10-16 02:19:39,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:39,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:19:39,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:39,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-10-16 02:19:39,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:39,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-10-16 02:19:39,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:39,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3174 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3162 trivial. 0 not checked. [2022-10-16 02:19:39,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:19:39,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750957019] [2022-10-16 02:19:39,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750957019] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:19:39,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39180754] [2022-10-16 02:19:39,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:39,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:19:39,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:19:39,365 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:19:39,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-16 02:19:39,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:39,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-16 02:19:39,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:19:39,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3174 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 3164 trivial. 0 not checked. [2022-10-16 02:19:39,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 02:19:39,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3174 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3162 trivial. 0 not checked. [2022-10-16 02:19:39,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39180754] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 02:19:39,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 02:19:39,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2022-10-16 02:19:39,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111797967] [2022-10-16 02:19:39,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 02:19:39,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-16 02:19:39,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:19:39,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-16 02:19:39,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-10-16 02:19:39,651 INFO L87 Difference]: Start difference. First operand 203 states and 208 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-16 02:19:39,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:19:39,676 INFO L93 Difference]: Finished difference Result 224 states and 232 transitions. [2022-10-16 02:19:39,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-16 02:19:39,677 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 197 [2022-10-16 02:19:39,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:19:39,679 INFO L225 Difference]: With dead ends: 224 [2022-10-16 02:19:39,679 INFO L226 Difference]: Without dead ends: 224 [2022-10-16 02:19:39,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-10-16 02:19:39,680 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 31 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 02:19:39,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 178 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 02:19:39,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-10-16 02:19:39,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2022-10-16 02:19:39,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 216 states have (on average 1.0462962962962963) internal successors, (226), 219 states have internal predecessors, (226), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:19:39,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 232 transitions. [2022-10-16 02:19:39,688 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 232 transitions. Word has length 197 [2022-10-16 02:19:39,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:19:39,689 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 232 transitions. [2022-10-16 02:19:39,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-16 02:19:39,689 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 232 transitions. [2022-10-16 02:19:39,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-10-16 02:19:39,694 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:19:39,694 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 40, 8, 8, 8, 8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:19:39,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-16 02:19:39,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:19:39,907 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:19:39,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:19:39,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1583273414, now seen corresponding path program 2 times [2022-10-16 02:19:39,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:19:39,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791244731] [2022-10-16 02:19:39,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:39,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:19:39,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:40,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-10-16 02:19:40,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:40,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-10-16 02:19:40,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:40,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3321 trivial. 0 not checked. [2022-10-16 02:19:40,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:19:40,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791244731] [2022-10-16 02:19:40,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791244731] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 02:19:40,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 02:19:40,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-16 02:19:40,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608708044] [2022-10-16 02:19:40,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 02:19:40,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 02:19:40,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:19:40,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 02:19:40,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-16 02:19:40,692 INFO L87 Difference]: Start difference. First operand 224 states and 232 transitions. Second operand has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 02:19:40,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:19:40,740 INFO L93 Difference]: Finished difference Result 229 states and 237 transitions. [2022-10-16 02:19:40,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 02:19:40,741 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 227 [2022-10-16 02:19:40,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:19:40,743 INFO L225 Difference]: With dead ends: 229 [2022-10-16 02:19:40,744 INFO L226 Difference]: Without dead ends: 229 [2022-10-16 02:19:40,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-16 02:19:40,745 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 18 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 02:19:40,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 71 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 02:19:40,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-10-16 02:19:40,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 227. [2022-10-16 02:19:40,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 219 states have (on average 1.0456621004566211) internal successors, (229), 222 states have internal predecessors, (229), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:19:40,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 235 transitions. [2022-10-16 02:19:40,753 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 235 transitions. Word has length 227 [2022-10-16 02:19:40,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:19:40,755 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 235 transitions. [2022-10-16 02:19:40,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 02:19:40,756 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 235 transitions. [2022-10-16 02:19:40,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-10-16 02:19:40,759 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:19:40,760 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 40, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:19:40,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-10-16 02:19:40,760 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:19:40,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:19:40,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1255310272, now seen corresponding path program 1 times [2022-10-16 02:19:40,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:19:40,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645853317] [2022-10-16 02:19:40,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:40,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:19:40,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:41,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-10-16 02:19:41,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:41,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-10-16 02:19:41,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:41,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3323 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3321 trivial. 0 not checked. [2022-10-16 02:19:41,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:19:41,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645853317] [2022-10-16 02:19:41,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645853317] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:19:41,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052052552] [2022-10-16 02:19:41,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:41,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:19:41,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:19:41,527 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:19:41,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-16 02:19:41,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:41,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 818 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-16 02:19:41,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:19:41,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3323 backedges. 90 proven. 34 refuted. 0 times theorem prover too weak. 3199 trivial. 0 not checked. [2022-10-16 02:19:41,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 02:19:41,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3323 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 3197 trivial. 0 not checked. [2022-10-16 02:19:41,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052052552] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 02:19:41,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 02:19:41,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 16 [2022-10-16 02:19:41,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175245427] [2022-10-16 02:19:41,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 02:19:41,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-10-16 02:19:41,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:19:41,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-10-16 02:19:41,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-10-16 02:19:41,898 INFO L87 Difference]: Start difference. First operand 227 states and 235 transitions. Second operand has 16 states, 16 states have (on average 6.75) internal successors, (108), 16 states have internal predecessors, (108), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-10-16 02:19:42,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:19:42,038 INFO L93 Difference]: Finished difference Result 270 states and 284 transitions. [2022-10-16 02:19:42,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-16 02:19:42,039 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.75) internal successors, (108), 16 states have internal predecessors, (108), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 232 [2022-10-16 02:19:42,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:19:42,041 INFO L225 Difference]: With dead ends: 270 [2022-10-16 02:19:42,041 INFO L226 Difference]: Without dead ends: 270 [2022-10-16 02:19:42,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 457 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-10-16 02:19:42,043 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 148 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 02:19:42,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 167 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 02:19:42,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-10-16 02:19:42,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2022-10-16 02:19:42,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 264 states have (on average 1.053030303030303) internal successors, (278), 265 states have internal predecessors, (278), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:19:42,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 284 transitions. [2022-10-16 02:19:42,051 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 284 transitions. Word has length 232 [2022-10-16 02:19:42,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:19:42,052 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 284 transitions. [2022-10-16 02:19:42,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.75) internal successors, (108), 16 states have internal predecessors, (108), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-10-16 02:19:42,052 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 284 transitions. [2022-10-16 02:19:42,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2022-10-16 02:19:42,058 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:19:42,059 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 40, 30, 30, 30, 30, 30, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:19:42,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-16 02:19:42,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-10-16 02:19:42,274 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:19:42,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:19:42,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1389783745, now seen corresponding path program 1 times [2022-10-16 02:19:42,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:19:42,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699644276] [2022-10-16 02:19:42,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:42,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:19:42,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:43,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-10-16 02:19:43,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:43,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2022-10-16 02:19:43,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:43,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 297 [2022-10-16 02:19:43,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:43,259 INFO L134 CoverageAnalysis]: Checked inductivity of 5447 backedges. 0 proven. 1283 refuted. 0 times theorem prover too weak. 4164 trivial. 0 not checked. [2022-10-16 02:19:43,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:19:43,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699644276] [2022-10-16 02:19:43,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699644276] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:19:43,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638433846] [2022-10-16 02:19:43,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:43,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:19:43,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:19:43,262 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:19:43,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-16 02:19:43,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:43,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 1177 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-16 02:19:43,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:19:43,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5447 backedges. 1044 proven. 235 refuted. 0 times theorem prover too weak. 4168 trivial. 0 not checked. [2022-10-16 02:19:43,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 02:19:44,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5447 backedges. 0 proven. 1283 refuted. 0 times theorem prover too weak. 4164 trivial. 0 not checked. [2022-10-16 02:19:44,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638433846] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 02:19:44,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 02:19:44,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2022-10-16 02:19:44,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791738582] [2022-10-16 02:19:44,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 02:19:44,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-10-16 02:19:44,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:19:44,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-10-16 02:19:44,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2022-10-16 02:19:44,046 INFO L87 Difference]: Start difference. First operand 270 states and 284 transitions. Second operand has 24 states, 24 states have (on average 6.208333333333333) internal successors, (149), 24 states have internal predecessors, (149), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-16 02:19:44,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:19:44,181 INFO L93 Difference]: Finished difference Result 354 states and 380 transitions. [2022-10-16 02:19:44,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-10-16 02:19:44,182 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 6.208333333333333) internal successors, (149), 24 states have internal predecessors, (149), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 356 [2022-10-16 02:19:44,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:19:44,188 INFO L225 Difference]: With dead ends: 354 [2022-10-16 02:19:44,188 INFO L226 Difference]: Without dead ends: 354 [2022-10-16 02:19:44,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 729 GetRequests, 707 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2022-10-16 02:19:44,189 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 238 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 02:19:44,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 318 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 02:19:44,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-10-16 02:19:44,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 354. [2022-10-16 02:19:44,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 348 states have (on average 1.0747126436781609) internal successors, (374), 349 states have internal predecessors, (374), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:19:44,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 380 transitions. [2022-10-16 02:19:44,202 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 380 transitions. Word has length 356 [2022-10-16 02:19:44,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:19:44,202 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 380 transitions. [2022-10-16 02:19:44,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.208333333333333) internal successors, (149), 24 states have internal predecessors, (149), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-16 02:19:44,205 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 380 transitions. [2022-10-16 02:19:44,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2022-10-16 02:19:44,219 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:19:44,219 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 66, 66, 40, 40, 40, 40, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:19:44,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-16 02:19:44,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-10-16 02:19:44,433 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:19:44,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:19:44,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1655100929, now seen corresponding path program 2 times [2022-10-16 02:19:44,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:19:44,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703859088] [2022-10-16 02:19:44,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:44,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:19:44,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:46,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-10-16 02:19:46,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:46,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2022-10-16 02:19:46,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:46,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 417 [2022-10-16 02:19:46,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:46,812 INFO L134 CoverageAnalysis]: Checked inductivity of 14105 backedges. 0 proven. 6113 refuted. 0 times theorem prover too weak. 7992 trivial. 0 not checked. [2022-10-16 02:19:46,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:19:46,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703859088] [2022-10-16 02:19:46,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703859088] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:19:46,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342640968] [2022-10-16 02:19:46,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 02:19:46,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:19:46,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:19:46,815 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:19:46,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-16 02:19:47,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 02:19:47,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 02:19:47,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 1681 conjuncts, 24 conjunts are in the unsatisfiable core [2022-10-16 02:19:47,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:19:47,419 INFO L134 CoverageAnalysis]: Checked inductivity of 14105 backedges. 4932 proven. 1177 refuted. 0 times theorem prover too weak. 7996 trivial. 0 not checked. [2022-10-16 02:19:47,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 02:19:48,127 INFO L134 CoverageAnalysis]: Checked inductivity of 14105 backedges. 0 proven. 6113 refuted. 0 times theorem prover too weak. 7992 trivial. 0 not checked. [2022-10-16 02:19:48,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342640968] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 02:19:48,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 02:19:48,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 42 [2022-10-16 02:19:48,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247965622] [2022-10-16 02:19:48,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 02:19:48,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-10-16 02:19:48,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:19:48,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-10-16 02:19:48,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2022-10-16 02:19:48,133 INFO L87 Difference]: Start difference. First operand 354 states and 380 transitions. Second operand has 42 states, 42 states have (on average 5.809523809523809) internal successors, (244), 42 states have internal predecessors, (244), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-16 02:19:48,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:19:48,431 INFO L93 Difference]: Finished difference Result 480 states and 524 transitions. [2022-10-16 02:19:48,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-10-16 02:19:48,431 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 5.809523809523809) internal successors, (244), 42 states have internal predecessors, (244), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 536 [2022-10-16 02:19:48,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:19:48,434 INFO L225 Difference]: With dead ends: 480 [2022-10-16 02:19:48,435 INFO L226 Difference]: Without dead ends: 480 [2022-10-16 02:19:48,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1101 GetRequests, 1055 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2022-10-16 02:19:48,436 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 475 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 02:19:48,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [475 Valid, 466 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 02:19:48,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2022-10-16 02:19:48,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 480. [2022-10-16 02:19:48,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 474 states have (on average 1.0928270042194093) internal successors, (518), 475 states have internal predecessors, (518), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:19:48,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 524 transitions. [2022-10-16 02:19:48,451 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 524 transitions. Word has length 536 [2022-10-16 02:19:48,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:19:48,451 INFO L495 AbstractCegarLoop]: Abstraction has 480 states and 524 transitions. [2022-10-16 02:19:48,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 5.809523809523809) internal successors, (244), 42 states have internal predecessors, (244), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-16 02:19:48,452 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 524 transitions. [2022-10-16 02:19:48,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 807 [2022-10-16 02:19:48,475 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:19:48,475 INFO L195 NwaCegarLoop]: trace histogram [120, 120, 120, 120, 120, 40, 40, 40, 40, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:19:48,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-16 02:19:48,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-10-16 02:19:48,690 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:19:48,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:19:48,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1033065759, now seen corresponding path program 3 times [2022-10-16 02:19:48,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:19:48,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933445784] [2022-10-16 02:19:48,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:48,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:19:48,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:49,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-10-16 02:19:49,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:49,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2022-10-16 02:19:49,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:49,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 597 [2022-10-16 02:19:49,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:49,781 INFO L134 CoverageAnalysis]: Checked inductivity of 39242 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 39235 trivial. 0 not checked. [2022-10-16 02:19:49,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:19:49,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933445784] [2022-10-16 02:19:49,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933445784] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:19:49,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450966949] [2022-10-16 02:19:49,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 02:19:49,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:19:49,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:19:49,783 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:19:49,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-10-16 02:19:50,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-10-16 02:19:50,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 02:19:50,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-16 02:19:50,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:19:50,119 INFO L134 CoverageAnalysis]: Checked inductivity of 39242 backedges. 16170 proven. 7 refuted. 0 times theorem prover too weak. 23065 trivial. 0 not checked. [2022-10-16 02:19:50,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 02:19:50,186 INFO L134 CoverageAnalysis]: Checked inductivity of 39242 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 39235 trivial. 0 not checked. [2022-10-16 02:19:50,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450966949] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 02:19:50,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 02:19:50,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-10-16 02:19:50,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109578893] [2022-10-16 02:19:50,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 02:19:50,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-16 02:19:50,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:19:50,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-16 02:19:50,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-10-16 02:19:50,191 INFO L87 Difference]: Start difference. First operand 480 states and 524 transitions. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-16 02:19:50,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:19:50,229 INFO L93 Difference]: Finished difference Result 500 states and 544 transitions. [2022-10-16 02:19:50,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-16 02:19:50,229 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 806 [2022-10-16 02:19:50,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:19:50,233 INFO L225 Difference]: With dead ends: 500 [2022-10-16 02:19:50,233 INFO L226 Difference]: Without dead ends: 500 [2022-10-16 02:19:50,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1621 GetRequests, 1614 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-10-16 02:19:50,234 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 24 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 02:19:50,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 169 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 02:19:50,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2022-10-16 02:19:50,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 500. [2022-10-16 02:19:50,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 494 states have (on average 1.0890688259109311) internal successors, (538), 495 states have internal predecessors, (538), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:19:50,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 544 transitions. [2022-10-16 02:19:50,248 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 544 transitions. Word has length 806 [2022-10-16 02:19:50,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:19:50,250 INFO L495 AbstractCegarLoop]: Abstraction has 500 states and 544 transitions. [2022-10-16 02:19:50,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-16 02:19:50,250 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 544 transitions. [2022-10-16 02:19:50,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 827 [2022-10-16 02:19:50,280 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:19:50,280 INFO L195 NwaCegarLoop]: trace histogram [120, 120, 120, 120, 120, 40, 40, 40, 40, 6, 6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:19:50,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-10-16 02:19:50,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-10-16 02:19:50,494 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:19:50,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:19:50,495 INFO L85 PathProgramCache]: Analyzing trace with hash 603169633, now seen corresponding path program 4 times [2022-10-16 02:19:50,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:19:50,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175780998] [2022-10-16 02:19:50,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:19:50,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:19:50,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:51,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-10-16 02:19:51,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:51,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2022-10-16 02:19:51,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:51,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 617 [2022-10-16 02:19:51,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:19:51,719 INFO L134 CoverageAnalysis]: Checked inductivity of 39316 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 39235 trivial. 0 not checked. [2022-10-16 02:19:51,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:19:51,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175780998] [2022-10-16 02:19:51,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175780998] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:19:51,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475913700] [2022-10-16 02:19:51,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-16 02:19:51,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:19:51,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:19:51,722 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:19:51,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-10-16 02:20:10,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-16 02:20:10,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 02:20:10,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 2509 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-16 02:20:10,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 02:20:10,486 INFO L134 CoverageAnalysis]: Checked inductivity of 39316 backedges. 16170 proven. 81 refuted. 0 times theorem prover too weak. 23065 trivial. 0 not checked. [2022-10-16 02:20:10,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 02:20:10,635 INFO L134 CoverageAnalysis]: Checked inductivity of 39316 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 39235 trivial. 0 not checked. [2022-10-16 02:20:10,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475913700] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 02:20:10,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 02:20:10,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-10-16 02:20:10,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603512848] [2022-10-16 02:20:10,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 02:20:10,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-16 02:20:10,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 02:20:10,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-16 02:20:10,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-16 02:20:10,640 INFO L87 Difference]: Start difference. First operand 500 states and 544 transitions. Second operand has 17 states, 17 states have (on average 6.352941176470588) internal successors, (108), 17 states have internal predecessors, (108), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-16 02:20:10,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 02:20:10,719 INFO L93 Difference]: Finished difference Result 540 states and 584 transitions. [2022-10-16 02:20:10,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-16 02:20:10,720 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.352941176470588) internal successors, (108), 17 states have internal predecessors, (108), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 826 [2022-10-16 02:20:10,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 02:20:10,724 INFO L225 Difference]: With dead ends: 540 [2022-10-16 02:20:10,724 INFO L226 Difference]: Without dead ends: 540 [2022-10-16 02:20:10,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1665 GetRequests, 1650 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-16 02:20:10,725 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 56 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 02:20:10,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 137 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 02:20:10,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-10-16 02:20:10,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2022-10-16 02:20:10,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 534 states have (on average 1.0823970037453183) internal successors, (578), 535 states have internal predecessors, (578), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 02:20:10,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 584 transitions. [2022-10-16 02:20:10,739 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 584 transitions. Word has length 826 [2022-10-16 02:20:10,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 02:20:10,740 INFO L495 AbstractCegarLoop]: Abstraction has 540 states and 584 transitions. [2022-10-16 02:20:10,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.352941176470588) internal successors, (108), 17 states have internal predecessors, (108), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-16 02:20:10,741 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 584 transitions. [2022-10-16 02:20:10,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 867 [2022-10-16 02:20:10,750 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 02:20:10,751 INFO L195 NwaCegarLoop]: trace histogram [120, 120, 120, 120, 120, 40, 40, 40, 40, 14, 14, 14, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 02:20:10,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-10-16 02:20:10,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-10-16 02:20:10,967 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-10-16 02:20:10,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 02:20:10,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1577964641, now seen corresponding path program 5 times [2022-10-16 02:20:10,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 02:20:10,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203053692] [2022-10-16 02:20:10,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 02:20:10,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 02:20:11,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:20:12,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-10-16 02:20:12,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:20:12,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2022-10-16 02:20:12,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:20:12,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 657 [2022-10-16 02:20:12,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 02:20:12,822 INFO L134 CoverageAnalysis]: Checked inductivity of 39704 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 39235 trivial. 0 not checked. [2022-10-16 02:20:12,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 02:20:12,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203053692] [2022-10-16 02:20:12,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203053692] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 02:20:12,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497155459] [2022-10-16 02:20:12,823 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-10-16 02:20:12,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 02:20:12,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 02:20:12,824 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 02:20:12,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process