/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/sep10-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 17:15:38,249 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 17:15:38,252 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 17:15:38,289 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 17:15:38,290 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 17:15:38,292 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 17:15:38,307 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 17:15:38,311 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 17:15:38,313 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 17:15:38,315 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 17:15:38,316 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 17:15:38,318 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 17:15:38,318 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 17:15:38,320 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 17:15:38,345 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 17:15:38,347 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 17:15:38,349 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 17:15:38,350 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 17:15:38,352 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 17:15:38,356 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 17:15:38,358 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 17:15:38,359 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 17:15:38,360 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 17:15:38,361 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 17:15:38,366 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-15 17:15:38,376 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 17:15:38,377 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 17:15:38,378 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 17:15:38,379 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-15 17:15:38,407 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 17:15:38,407 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 17:15:38,408 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 17:15:38,408 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 17:15:38,409 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 17:15:38,409 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 17:15:38,410 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 17:15:38,410 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 17:15:38,411 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 17:15:38,411 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 17:15:38,411 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 17:15:38,412 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 17:15:38,412 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 17:15:38,412 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 17:15:38,412 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 17:15:38,413 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 17:15:38,413 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 17:15:38,413 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 17:15:38,413 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 17:15:38,414 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 17:15:38,414 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 17:15:38,414 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 17:15:38,415 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 17:15:38,415 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 17:15:38,415 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 17:15:38,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 17:15:38,416 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 17:15:38,416 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 17:15:38,416 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 17:15:38,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 17:15:38,417 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 17:15:38,796 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 17:15:38,831 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 17:15:38,834 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 17:15:38,836 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 17:15:38,837 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 17:15:38,840 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/sep10-2.i [2022-10-15 17:15:38,935 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43144a21c/c33e694d756845b5a927f550e95eae2f/FLAG0737f3064 [2022-10-15 17:15:39,553 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 17:15:39,554 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep10-2.i [2022-10-15 17:15:39,562 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43144a21c/c33e694d756845b5a927f550e95eae2f/FLAG0737f3064 [2022-10-15 17:15:39,908 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43144a21c/c33e694d756845b5a927f550e95eae2f [2022-10-15 17:15:39,911 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 17:15:39,918 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 17:15:39,922 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 17:15:39,923 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 17:15:39,927 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 17:15:39,928 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:15:39" (1/1) ... [2022-10-15 17:15:39,930 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@634d785c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:15:39, skipping insertion in model container [2022-10-15 17:15:39,930 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:15:39" (1/1) ... [2022-10-15 17:15:39,939 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 17:15:39,958 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 17:15:40,192 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/sep10-2.i[1293,1306] [2022-10-15 17:15:40,196 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 17:15:40,206 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 17:15:40,229 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/sep10-2.i[1293,1306] [2022-10-15 17:15:40,230 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 17:15:40,254 INFO L208 MainTranslator]: Completed translation [2022-10-15 17:15:40,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:15:40 WrapperNode [2022-10-15 17:15:40,255 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 17:15:40,256 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 17:15:40,256 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 17:15:40,256 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 17:15:40,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:15:40" (1/1) ... [2022-10-15 17:15:40,275 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:15:40" (1/1) ... [2022-10-15 17:15:40,302 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-10-15 17:15:40,303 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 17:15:40,304 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 17:15:40,304 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 17:15:40,304 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 17:15:40,315 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:15:40" (1/1) ... [2022-10-15 17:15:40,315 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:15:40" (1/1) ... [2022-10-15 17:15:40,319 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:15:40" (1/1) ... [2022-10-15 17:15:40,319 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:15:40" (1/1) ... [2022-10-15 17:15:40,326 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:15:40" (1/1) ... [2022-10-15 17:15:40,331 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:15:40" (1/1) ... [2022-10-15 17:15:40,332 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:15:40" (1/1) ... [2022-10-15 17:15:40,333 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:15:40" (1/1) ... [2022-10-15 17:15:40,336 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 17:15:40,337 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 17:15:40,337 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 17:15:40,337 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 17:15:40,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:15:40" (1/1) ... [2022-10-15 17:15:40,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 17:15:40,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:15:40,373 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-15 17:15:40,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-15 17:15:40,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 17:15:40,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 17:15:40,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 17:15:40,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 17:15:40,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 17:15:40,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 17:15:40,436 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 17:15:40,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 17:15:40,436 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2022-10-15 17:15:40,436 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2022-10-15 17:15:40,527 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 17:15:40,529 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 17:15:40,926 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 17:15:40,935 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 17:15:40,936 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-10-15 17:15:40,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:15:40 BoogieIcfgContainer [2022-10-15 17:15:40,939 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 17:15:40,942 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 17:15:40,942 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 17:15:40,946 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 17:15:40,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 05:15:39" (1/3) ... [2022-10-15 17:15:40,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72b7840c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:15:40, skipping insertion in model container [2022-10-15 17:15:40,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:15:40" (2/3) ... [2022-10-15 17:15:40,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72b7840c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:15:40, skipping insertion in model container [2022-10-15 17:15:40,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:15:40" (3/3) ... [2022-10-15 17:15:40,951 INFO L112 eAbstractionObserver]: Analyzing ICFG sep10-2.i [2022-10-15 17:15:40,975 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 17:15:40,975 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2022-10-15 17:15:41,059 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 17:15:41,074 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;@6857037b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 17:15:41,075 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2022-10-15 17:15:41,090 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 57 states have internal predecessors, (65), 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) [2022-10-15 17:15:41,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 17:15:41,102 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:15:41,103 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 17:15:41,104 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 17:15:41,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:15:41,119 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2022-10-15 17:15:41,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:15:41,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455367526] [2022-10-15 17:15:41,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:15:41,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:15:41,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:41,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:15:41,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:15:41,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455367526] [2022-10-15 17:15:41,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455367526] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:15:41,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:15:41,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 17:15:41,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481930960] [2022-10-15 17:15:41,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:15:41,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:15:41,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:15:41,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:15:41,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:15:41,555 INFO L87 Difference]: Start difference. First operand has 62 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 57 states have internal predecessors, (65), 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) [2022-10-15 17:15:41,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:15:41,727 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2022-10-15 17:15:41,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:15:41,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-15 17:15:41,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:15:41,742 INFO L225 Difference]: With dead ends: 53 [2022-10-15 17:15:41,743 INFO L226 Difference]: Without dead ends: 51 [2022-10-15 17:15:41,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:15:41,756 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 34 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:15:41,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 49 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:15:41,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-10-15 17:15:41,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-10-15 17:15:41,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 46 states have internal predecessors, (50), 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) [2022-10-15 17:15:41,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2022-10-15 17:15:41,804 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 4 [2022-10-15 17:15:41,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:15:41,804 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2022-10-15 17:15:41,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:15:41,805 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2022-10-15 17:15:41,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 17:15:41,806 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:15:41,806 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 17:15:41,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 17:15:41,806 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 17:15:41,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:15:41,807 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2022-10-15 17:15:41,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:15:41,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552627225] [2022-10-15 17:15:41,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:15:41,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:15:41,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:41,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:15:41,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:15:41,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552627225] [2022-10-15 17:15:41,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552627225] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:15:41,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:15:41,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 17:15:41,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584576140] [2022-10-15 17:15:41,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:15:41,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:15:41,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:15:41,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:15:41,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:15:41,969 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:15:42,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:15:42,093 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2022-10-15 17:15:42,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:15:42,097 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-15 17:15:42,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:15:42,099 INFO L225 Difference]: With dead ends: 55 [2022-10-15 17:15:42,099 INFO L226 Difference]: Without dead ends: 55 [2022-10-15 17:15:42,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:15:42,101 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 2 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:15:42,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 80 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:15:42,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-10-15 17:15:42,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2022-10-15 17:15:42,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 48 states have internal predecessors, (52), 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) [2022-10-15 17:15:42,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2022-10-15 17:15:42,121 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 4 [2022-10-15 17:15:42,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:15:42,122 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2022-10-15 17:15:42,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:15:42,122 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2022-10-15 17:15:42,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-15 17:15:42,123 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:15:42,123 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-10-15 17:15:42,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 17:15:42,128 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 17:15:42,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:15:42,129 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2022-10-15 17:15:42,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:15:42,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052197050] [2022-10-15 17:15:42,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:15:42,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:15:42,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:42,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:15:42,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:15:42,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052197050] [2022-10-15 17:15:42,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052197050] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:15:42,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072754225] [2022-10-15 17:15:42,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:15:42,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:15:42,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:15:42,426 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:15:42,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-15 17:15:42,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:42,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-15 17:15:42,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:15:42,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 17:15:42,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:15:42,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:15:42,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:15:42,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072754225] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:15:42,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:15:42,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2022-10-15 17:15:42,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855534667] [2022-10-15 17:15:42,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:15:42,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-15 17:15:42,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:15:42,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-15 17:15:42,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-10-15 17:15:42,830 INFO L87 Difference]: Start difference. First operand 53 states and 58 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) [2022-10-15 17:15:43,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:15:43,051 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2022-10-15 17:15:43,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-15 17:15:43,052 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 [2022-10-15 17:15:43,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:15:43,054 INFO L225 Difference]: With dead ends: 57 [2022-10-15 17:15:43,054 INFO L226 Difference]: Without dead ends: 57 [2022-10-15 17:15:43,055 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 [2022-10-15 17:15:43,056 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 50 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:15:43,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 96 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:15:43,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-10-15 17:15:43,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-10-15 17:15:43,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 52 states have internal predecessors, (56), 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) [2022-10-15 17:15:43,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2022-10-15 17:15:43,068 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 8 [2022-10-15 17:15:43,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:15:43,068 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2022-10-15 17:15:43,069 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) [2022-10-15 17:15:43,069 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2022-10-15 17:15:43,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-10-15 17:15:43,070 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:15:43,070 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:15:43,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-15 17:15:43,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:15:43,285 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting sepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 17:15:43,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:15:43,287 INFO L85 PathProgramCache]: Analyzing trace with hash 870736771, now seen corresponding path program 1 times [2022-10-15 17:15:43,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:15:43,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405354857] [2022-10-15 17:15:43,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:15:43,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:15:43,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:43,498 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-15 17:15:43,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:15:43,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405354857] [2022-10-15 17:15:43,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405354857] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:15:43,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:15:43,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-15 17:15:43,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141467140] [2022-10-15 17:15:43,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:15:43,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-15 17:15:43,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:15:43,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-15 17:15:43,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-15 17:15:43,508 INFO L87 Difference]: Start difference. First operand 57 states and 62 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) [2022-10-15 17:15:43,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:15:43,598 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2022-10-15 17:15:43,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-15 17:15:43,599 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 [2022-10-15 17:15:43,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:15:43,604 INFO L225 Difference]: With dead ends: 56 [2022-10-15 17:15:43,604 INFO L226 Difference]: Without dead ends: 56 [2022-10-15 17:15:43,610 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 [2022-10-15 17:15:43,616 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 41 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:15:43,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 71 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:15:43,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-10-15 17:15:43,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-10-15 17:15:43,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 47 states have (on average 1.1702127659574468) 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) [2022-10-15 17:15:43,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2022-10-15 17:15:43,637 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 23 [2022-10-15 17:15:43,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:15:43,638 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2022-10-15 17:15:43,638 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) [2022-10-15 17:15:43,639 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2022-10-15 17:15:43,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-10-15 17:15:43,640 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:15:43,641 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:15:43,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-15 17:15:43,643 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting sepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 17:15:43,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:15:43,645 INFO L85 PathProgramCache]: Analyzing trace with hash 870736772, now seen corresponding path program 1 times [2022-10-15 17:15:43,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:15:43,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624830310] [2022-10-15 17:15:43,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:15:43,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:15:43,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:43,849 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:15:43,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:15:43,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624830310] [2022-10-15 17:15:43,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624830310] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:15:43,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050572176] [2022-10-15 17:15:43,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:15:43,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:15:43,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:15:43,852 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:15:43,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-15 17:15:43,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:43,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-15 17:15:43,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:15:43,978 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:15:43,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:15:44,060 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:15:44,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050572176] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:15:44,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:15:44,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-10-15 17:15:44,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709348356] [2022-10-15 17:15:44,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:15:44,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-10-15 17:15:44,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:15:44,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-10-15 17:15:44,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-10-15 17:15:44,064 INFO L87 Difference]: Start difference. First operand 56 states and 61 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) [2022-10-15 17:15:44,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:15:44,141 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2022-10-15 17:15:44,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-15 17:15:44,141 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 [2022-10-15 17:15:44,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:15:44,143 INFO L225 Difference]: With dead ends: 80 [2022-10-15 17:15:44,143 INFO L226 Difference]: Without dead ends: 80 [2022-10-15 17:15:44,144 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 [2022-10-15 17:15:44,145 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 30 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:15:44,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 265 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:15:44,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-10-15 17:15:44,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-10-15 17:15:44,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 75 states have internal predecessors, (79), 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) [2022-10-15 17:15:44,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2022-10-15 17:15:44,155 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 23 [2022-10-15 17:15:44,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:15:44,155 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2022-10-15 17:15:44,156 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) [2022-10-15 17:15:44,156 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2022-10-15 17:15:44,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-10-15 17:15:44,158 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:15:44,158 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:15:44,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-10-15 17:15:44,371 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 [2022-10-15 17:15:44,372 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting sepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 17:15:44,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:15:44,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1710469554, now seen corresponding path program 2 times [2022-10-15 17:15:44,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:15:44,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158648198] [2022-10-15 17:15:44,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:15:44,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:15:44,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:44,734 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-10-15 17:15:44,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:15:44,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158648198] [2022-10-15 17:15:44,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158648198] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:15:44,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:15:44,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-15 17:15:44,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827484566] [2022-10-15 17:15:44,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:15:44,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-15 17:15:44,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:15:44,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-15 17:15:44,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-15 17:15:44,737 INFO L87 Difference]: Start difference. First operand 80 states and 85 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) [2022-10-15 17:15:44,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:15:44,818 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2022-10-15 17:15:44,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-15 17:15:44,818 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 [2022-10-15 17:15:44,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:15:44,820 INFO L225 Difference]: With dead ends: 84 [2022-10-15 17:15:44,820 INFO L226 Difference]: Without dead ends: 84 [2022-10-15 17:15:44,820 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 [2022-10-15 17:15:44,821 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 40 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:15:44,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 74 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:15:44,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-10-15 17:15:44,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2022-10-15 17:15:44,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 77 states have internal predecessors, (81), 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) [2022-10-15 17:15:44,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2022-10-15 17:15:44,829 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 47 [2022-10-15 17:15:44,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:15:44,830 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2022-10-15 17:15:44,830 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) [2022-10-15 17:15:44,831 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2022-10-15 17:15:44,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-10-15 17:15:44,832 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:15:44,832 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:15:44,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-15 17:15:44,833 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting sepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 17:15:44,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:15:44,833 INFO L85 PathProgramCache]: Analyzing trace with hash -57640907, now seen corresponding path program 1 times [2022-10-15 17:15:44,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:15:44,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949462825] [2022-10-15 17:15:44,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:15:44,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:15:44,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:45,236 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-10-15 17:15:45,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:15:45,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949462825] [2022-10-15 17:15:45,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949462825] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:15:45,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472529741] [2022-10-15 17:15:45,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:15:45,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:15:45,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:15:45,239 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:15:45,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-15 17:15:45,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:45,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 25 conjunts are in the unsatisfiable core [2022-10-15 17:15:45,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:15:45,749 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 162 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:15:45,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:15:45,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-10-15 17:15:46,326 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 162 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:15:46,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472529741] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:15:46,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:15:46,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 15, 15] total 33 [2022-10-15 17:15:46,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259908631] [2022-10-15 17:15:46,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:15:46,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-10-15 17:15:46,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:15:46,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-10-15 17:15:46,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=852, Unknown=0, NotChecked=0, Total=1122 [2022-10-15 17:15:46,330 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand has 34 states, 33 states have (on average 3.393939393939394) internal successors, (112), 31 states have internal predecessors, (112), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:15:47,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:15:47,091 INFO L93 Difference]: Finished difference Result 100 states and 114 transitions. [2022-10-15 17:15:47,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-15 17:15:47,091 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.393939393939394) internal successors, (112), 31 states have internal predecessors, (112), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-10-15 17:15:47,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:15:47,094 INFO L225 Difference]: With dead ends: 100 [2022-10-15 17:15:47,094 INFO L226 Difference]: Without dead ends: 100 [2022-10-15 17:15:47,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=555, Invalid=1701, Unknown=0, NotChecked=0, Total=2256 [2022-10-15 17:15:47,097 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 230 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-15 17:15:47,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 286 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-15 17:15:47,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-10-15 17:15:47,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2022-10-15 17:15:47,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 85 states have (on average 1.1529411764705881) internal successors, (98), 89 states have internal predecessors, (98), 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) [2022-10-15 17:15:47,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2022-10-15 17:15:47,108 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 51 [2022-10-15 17:15:47,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:15:47,109 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2022-10-15 17:15:47,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.393939393939394) internal successors, (112), 31 states have internal predecessors, (112), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:15:47,109 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2022-10-15 17:15:47,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-10-15 17:15:47,111 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:15:47,111 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-10-15 17:15:47,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-15 17:15:47,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:15:47,326 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting sepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 17:15:47,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:15:47,327 INFO L85 PathProgramCache]: Analyzing trace with hash -893652290, now seen corresponding path program 2 times [2022-10-15 17:15:47,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:15:47,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983980080] [2022-10-15 17:15:47,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:15:47,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:15:47,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:47,896 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-10-15 17:15:47,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:15:47,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983980080] [2022-10-15 17:15:47,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983980080] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:15:47,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514130399] [2022-10-15 17:15:47,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 17:15:47,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:15:47,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:15:47,898 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:15:47,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-15 17:15:47,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 17:15:47,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:15:47,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 31 conjunts are in the unsatisfiable core [2022-10-15 17:15:48,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:15:48,592 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 162 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:15:48,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:15:48,950 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-10-15 17:15:49,401 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 162 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:15:49,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514130399] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:15:49,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:15:49,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 18, 18] total 43 [2022-10-15 17:15:49,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059202128] [2022-10-15 17:15:49,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:15:49,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-10-15 17:15:49,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:15:49,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-10-15 17:15:49,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=1579, Unknown=0, NotChecked=0, Total=1892 [2022-10-15 17:15:49,405 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand has 44 states, 43 states have (on average 3.441860465116279) internal successors, (148), 41 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:15:50,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:15:50,677 INFO L93 Difference]: Finished difference Result 116 states and 130 transitions. [2022-10-15 17:15:50,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-10-15 17:15:50,678 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 3.441860465116279) internal successors, (148), 41 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-10-15 17:15:50,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:15:50,681 INFO L225 Difference]: With dead ends: 116 [2022-10-15 17:15:50,682 INFO L226 Difference]: Without dead ends: 116 [2022-10-15 17:15:50,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=715, Invalid=3445, Unknown=0, NotChecked=0, Total=4160 [2022-10-15 17:15:50,685 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 278 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-15 17:15:50,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 444 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-15 17:15:50,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-10-15 17:15:50,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-10-15 17:15:50,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 108 states have (on average 1.1481481481481481) internal successors, (124), 111 states have internal predecessors, (124), 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) [2022-10-15 17:15:50,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 130 transitions. [2022-10-15 17:15:50,710 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 130 transitions. Word has length 63 [2022-10-15 17:15:50,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:15:50,710 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 130 transitions. [2022-10-15 17:15:50,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 3.441860465116279) internal successors, (148), 41 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:15:50,714 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 130 transitions. [2022-10-15 17:15:50,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-10-15 17:15:50,723 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:15:50,724 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 10, 10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:15:50,756 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-10-15 17:15:50,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:15:50,925 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 17:15:50,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:15:50,926 INFO L85 PathProgramCache]: Analyzing trace with hash 69481526, now seen corresponding path program 1 times [2022-10-15 17:15:50,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:15:50,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006691683] [2022-10-15 17:15:50,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:15:50,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:15:50,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:51,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-10-15 17:15:51,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:51,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-10-15 17:15:51,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:51,415 INFO L134 CoverageAnalysis]: Checked inductivity of 995 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 995 trivial. 0 not checked. [2022-10-15 17:15:51,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:15:51,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006691683] [2022-10-15 17:15:51,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006691683] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:15:51,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:15:51,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-15 17:15:51,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029855885] [2022-10-15 17:15:51,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:15:51,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-15 17:15:51,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:15:51,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-15 17:15:51,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-10-15 17:15:51,419 INFO L87 Difference]: Start difference. First operand 116 states and 130 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-15 17:15:51,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:15:51,467 INFO L93 Difference]: Finished difference Result 121 states and 135 transitions. [2022-10-15 17:15:51,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 17:15:51,468 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 147 [2022-10-15 17:15:51,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:15:51,471 INFO L225 Difference]: With dead ends: 121 [2022-10-15 17:15:51,471 INFO L226 Difference]: Without dead ends: 121 [2022-10-15 17:15:51,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-10-15 17:15:51,474 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 47 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 17:15:51,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 66 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 17:15:51,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-10-15 17:15:51,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2022-10-15 17:15:51,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 114 states have internal predecessors, (127), 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) [2022-10-15 17:15:51,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 133 transitions. [2022-10-15 17:15:51,492 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 133 transitions. Word has length 147 [2022-10-15 17:15:51,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:15:51,492 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 133 transitions. [2022-10-15 17:15:51,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-15 17:15:51,493 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 133 transitions. [2022-10-15 17:15:51,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-10-15 17:15:51,498 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:15:51,499 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 10, 10, 10, 10, 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] [2022-10-15 17:15:51,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-15 17:15:51,499 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 17:15:51,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:15:51,500 INFO L85 PathProgramCache]: Analyzing trace with hash 169705126, now seen corresponding path program 1 times [2022-10-15 17:15:51,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:15:51,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328464698] [2022-10-15 17:15:51,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:15:51,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:15:51,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:52,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-10-15 17:15:52,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:52,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-10-15 17:15:52,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:52,187 INFO L134 CoverageAnalysis]: Checked inductivity of 997 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 995 trivial. 0 not checked. [2022-10-15 17:15:52,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:15:52,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328464698] [2022-10-15 17:15:52,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328464698] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:15:52,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744833839] [2022-10-15 17:15:52,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:15:52,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:15:52,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:15:52,198 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:15:52,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-15 17:15:52,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:52,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 17 conjunts are in the unsatisfiable core [2022-10-15 17:15:52,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:15:53,051 INFO L134 CoverageAnalysis]: Checked inductivity of 997 backedges. 162 proven. 30 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2022-10-15 17:15:53,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:15:53,214 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-10-15 17:15:53,512 INFO L134 CoverageAnalysis]: Checked inductivity of 997 backedges. 162 proven. 30 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2022-10-15 17:15:53,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744833839] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:15:53,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:15:53,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 15, 14] total 31 [2022-10-15 17:15:53,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484413691] [2022-10-15 17:15:53,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:15:53,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-10-15 17:15:53,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:15:53,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-10-15 17:15:53,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=716, Unknown=0, NotChecked=0, Total=992 [2022-10-15 17:15:53,516 INFO L87 Difference]: Start difference. First operand 119 states and 133 transitions. Second operand has 32 states, 31 states have (on average 5.096774193548387) internal successors, (158), 32 states have internal predecessors, (158), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-10-15 17:15:54,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:15:54,093 INFO L93 Difference]: Finished difference Result 192 states and 221 transitions. [2022-10-15 17:15:54,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-10-15 17:15:54,094 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 5.096774193548387) internal successors, (158), 32 states have internal predecessors, (158), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 152 [2022-10-15 17:15:54,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:15:54,097 INFO L225 Difference]: With dead ends: 192 [2022-10-15 17:15:54,097 INFO L226 Difference]: Without dead ends: 192 [2022-10-15 17:15:54,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 286 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=565, Invalid=1415, Unknown=0, NotChecked=0, Total=1980 [2022-10-15 17:15:54,099 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 96 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 17:15:54,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 302 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 447 Invalid, 0 Unknown, 16 Unchecked, 0.3s Time] [2022-10-15 17:15:54,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-10-15 17:15:54,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 178. [2022-10-15 17:15:54,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 169 states have (on average 1.1775147928994083) internal successors, (199), 172 states have internal predecessors, (199), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 17:15:54,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 205 transitions. [2022-10-15 17:15:54,109 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 205 transitions. Word has length 152 [2022-10-15 17:15:54,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:15:54,110 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 205 transitions. [2022-10-15 17:15:54,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 5.096774193548387) internal successors, (158), 32 states have internal predecessors, (158), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-10-15 17:15:54,111 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 205 transitions. [2022-10-15 17:15:54,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-10-15 17:15:54,113 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:15:54,114 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 10, 10, 10, 10, 3, 3, 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] [2022-10-15 17:15:54,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-15 17:15:54,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-10-15 17:15:54,328 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 17:15:54,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:15:54,330 INFO L85 PathProgramCache]: Analyzing trace with hash -760869757, now seen corresponding path program 1 times [2022-10-15 17:15:54,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:15:54,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570034548] [2022-10-15 17:15:54,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:15:54,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:15:54,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:54,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-10-15 17:15:54,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:54,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-10-15 17:15:54,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:54,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1006 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 995 trivial. 0 not checked. [2022-10-15 17:15:54,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:15:54,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570034548] [2022-10-15 17:15:54,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570034548] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:15:54,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421430466] [2022-10-15 17:15:54,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:15:54,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:15:54,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:15:54,799 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:15:54,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-15 17:15:54,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:54,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-15 17:15:54,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:15:55,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1006 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 995 trivial. 0 not checked. [2022-10-15 17:15:55,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 17:15:55,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421430466] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:15:55,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 17:15:55,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2022-10-15 17:15:55,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540396315] [2022-10-15 17:15:55,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:15:55,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-15 17:15:55,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:15:55,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-15 17:15:55,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-10-15 17:15:55,084 INFO L87 Difference]: Start difference. First operand 178 states and 205 transitions. Second operand has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 7 states have internal predecessors, (38), 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) [2022-10-15 17:15:55,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:15:55,132 INFO L93 Difference]: Finished difference Result 177 states and 203 transitions. [2022-10-15 17:15:55,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-15 17:15:55,132 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 7 states have internal predecessors, (38), 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 158 [2022-10-15 17:15:55,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:15:55,134 INFO L225 Difference]: With dead ends: 177 [2022-10-15 17:15:55,134 INFO L226 Difference]: Without dead ends: 177 [2022-10-15 17:15:55,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-10-15 17:15:55,135 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 24 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 17:15:55,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 72 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 17:15:55,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-10-15 17:15:55,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2022-10-15 17:15:55,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 169 states have (on average 1.165680473372781) internal successors, (197), 171 states have internal predecessors, (197), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 17:15:55,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 203 transitions. [2022-10-15 17:15:55,143 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 203 transitions. Word has length 158 [2022-10-15 17:15:55,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:15:55,144 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 203 transitions. [2022-10-15 17:15:55,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 7 states have internal predecessors, (38), 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) [2022-10-15 17:15:55,144 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 203 transitions. [2022-10-15 17:15:55,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-10-15 17:15:55,146 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:15:55,146 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 10, 10, 10, 10, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:15:55,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-15 17:15:55,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:15:55,362 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 17:15:55,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:15:55,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1026637770, now seen corresponding path program 2 times [2022-10-15 17:15:55,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:15:55,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338131615] [2022-10-15 17:15:55,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:15:55,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:15:55,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:56,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-10-15 17:15:56,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:56,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-10-15 17:15:56,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:56,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1033 backedges. 21 proven. 17 refuted. 0 times theorem prover too weak. 995 trivial. 0 not checked. [2022-10-15 17:15:56,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:15:56,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338131615] [2022-10-15 17:15:56,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338131615] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:15:56,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473091346] [2022-10-15 17:15:56,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 17:15:56,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:15:56,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:15:56,133 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:15:56,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-15 17:15:56,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 17:15:56,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:15:56,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-15 17:15:56,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:15:56,289 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 17:15:56,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1033 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 995 trivial. 0 not checked. [2022-10-15 17:15:56,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 17:15:56,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473091346] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:15:56,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 17:15:56,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 16 [2022-10-15 17:15:56,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361046812] [2022-10-15 17:15:56,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:15:56,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-15 17:15:56,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:15:56,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-15 17:15:56,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-10-15 17:15:56,790 INFO L87 Difference]: Start difference. First operand 177 states and 203 transitions. Second operand has 10 states, 9 states have (on average 5.222222222222222) internal successors, (47), 10 states have internal predecessors, (47), 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) [2022-10-15 17:15:56,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:15:56,860 INFO L93 Difference]: Finished difference Result 179 states and 205 transitions. [2022-10-15 17:15:56,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-15 17:15:56,860 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.222222222222222) internal successors, (47), 10 states have internal predecessors, (47), 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 167 [2022-10-15 17:15:56,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:15:56,862 INFO L225 Difference]: With dead ends: 179 [2022-10-15 17:15:56,863 INFO L226 Difference]: Without dead ends: 179 [2022-10-15 17:15:56,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 160 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-10-15 17:15:56,864 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 40 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:15:56,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 86 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 85 Invalid, 0 Unknown, 7 Unchecked, 0.1s Time] [2022-10-15 17:15:56,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-10-15 17:15:56,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 165. [2022-10-15 17:15:56,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 158 states have (on average 1.1582278481012658) internal successors, (183), 159 states have internal predecessors, (183), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 17:15:56,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 189 transitions. [2022-10-15 17:15:56,870 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 189 transitions. Word has length 167 [2022-10-15 17:15:56,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:15:56,871 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 189 transitions. [2022-10-15 17:15:56,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.222222222222222) internal successors, (47), 10 states have internal predecessors, (47), 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) [2022-10-15 17:15:56,871 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 189 transitions. [2022-10-15 17:15:56,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-10-15 17:15:56,874 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:15:56,874 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 10, 10, 10, 10, 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] [2022-10-15 17:15:56,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-15 17:15:57,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:15:57,088 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 17:15:57,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:15:57,089 INFO L85 PathProgramCache]: Analyzing trace with hash -597406871, now seen corresponding path program 1 times [2022-10-15 17:15:57,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:15:57,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877699372] [2022-10-15 17:15:57,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:15:57,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:15:57,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:57,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-10-15 17:15:57,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:57,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-10-15 17:15:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:57,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-10-15 17:15:57,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:57,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2042 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2022-10-15 17:15:57,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:15:57,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877699372] [2022-10-15 17:15:57,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877699372] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:15:57,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986495420] [2022-10-15 17:15:57,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:15:57,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:15:57,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:15:57,458 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:15:57,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-15 17:15:57,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:57,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-15 17:15:57,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:15:57,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2042 backedges. 850 proven. 7 refuted. 0 times theorem prover too weak. 1185 trivial. 0 not checked. [2022-10-15 17:15:57,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:15:57,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2042 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2022-10-15 17:15:57,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986495420] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:15:57,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:15:57,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-10-15 17:15:57,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171301624] [2022-10-15 17:15:57,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:15:57,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-15 17:15:57,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:15:57,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-15 17:15:57,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-10-15 17:15:57,724 INFO L87 Difference]: Start difference. First operand 165 states and 189 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 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) [2022-10-15 17:15:57,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:15:57,761 INFO L93 Difference]: Finished difference Result 185 states and 209 transitions. [2022-10-15 17:15:57,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-15 17:15:57,762 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 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 206 [2022-10-15 17:15:57,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:15:57,763 INFO L225 Difference]: With dead ends: 185 [2022-10-15 17:15:57,764 INFO L226 Difference]: Without dead ends: 185 [2022-10-15 17:15:57,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-10-15 17:15:57,765 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 24 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 17:15:57,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 121 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 17:15:57,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-10-15 17:15:57,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-10-15 17:15:57,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 178 states have (on average 1.1404494382022472) internal successors, (203), 179 states have internal predecessors, (203), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 17:15:57,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 209 transitions. [2022-10-15 17:15:57,771 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 209 transitions. Word has length 206 [2022-10-15 17:15:57,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:15:57,772 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 209 transitions. [2022-10-15 17:15:57,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 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) [2022-10-15 17:15:57,772 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 209 transitions. [2022-10-15 17:15:57,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-10-15 17:15:57,775 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:15:57,775 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 10, 10, 10, 10, 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] [2022-10-15 17:15:57,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-15 17:15:57,989 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,SelfDestructingSolverStorable12 [2022-10-15 17:15:57,990 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 17:15:57,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:15:57,991 INFO L85 PathProgramCache]: Analyzing trace with hash 2125610857, now seen corresponding path program 2 times [2022-10-15 17:15:57,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:15:57,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315294082] [2022-10-15 17:15:57,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:15:57,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:15:58,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:58,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-10-15 17:15:58,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:58,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-10-15 17:15:58,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:58,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2022-10-15 17:15:58,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:15:58,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2022-10-15 17:15:58,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:15:58,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315294082] [2022-10-15 17:15:58,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315294082] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:15:58,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313350767] [2022-10-15 17:15:58,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 17:15:58,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:15:58,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:15:58,487 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:15:58,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-15 17:15:58,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 17:15:58,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:15:58,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-15 17:15:58,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:15:58,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 850 proven. 81 refuted. 0 times theorem prover too weak. 1185 trivial. 0 not checked. [2022-10-15 17:15:58,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:15:58,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2022-10-15 17:15:58,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313350767] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:15:58,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:15:58,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2022-10-15 17:15:58,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414265774] [2022-10-15 17:15:58,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:15:58,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-15 17:15:58,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:15:58,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-15 17:15:58,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-10-15 17:15:58,845 INFO L87 Difference]: Start difference. First operand 185 states and 209 transitions. Second operand has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 12 states have internal predecessors, (86), 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) [2022-10-15 17:15:58,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:15:58,901 INFO L93 Difference]: Finished difference Result 200 states and 224 transitions. [2022-10-15 17:15:58,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-15 17:15:58,902 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 12 states have internal predecessors, (86), 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 226 [2022-10-15 17:15:58,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:15:58,904 INFO L225 Difference]: With dead ends: 200 [2022-10-15 17:15:58,904 INFO L226 Difference]: Without dead ends: 200 [2022-10-15 17:15:58,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 450 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-10-15 17:15:58,905 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 36 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 17:15:58,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 161 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 17:15:58,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-10-15 17:15:58,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2022-10-15 17:15:58,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 193 states have (on average 1.1295336787564767) internal successors, (218), 194 states have internal predecessors, (218), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 17:15:58,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 224 transitions. [2022-10-15 17:15:58,913 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 224 transitions. Word has length 226 [2022-10-15 17:15:58,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:15:58,913 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 224 transitions. [2022-10-15 17:15:58,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 12 states have internal predecessors, (86), 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) [2022-10-15 17:15:58,914 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 224 transitions. [2022-10-15 17:15:58,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-10-15 17:15:58,917 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:15:58,918 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 10, 10, 10, 10, 9, 9, 9, 9, 9, 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] [2022-10-15 17:15:58,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-15 17:15:59,132 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,SelfDestructingSolverStorable13 [2022-10-15 17:15:59,132 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 17:15:59,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:15:59,133 INFO L85 PathProgramCache]: Analyzing trace with hash 284577017, now seen corresponding path program 3 times [2022-10-15 17:15:59,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:15:59,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704889515] [2022-10-15 17:15:59,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:15:59,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:16:00,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:16:04,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-10-15 17:16:04,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:16:04,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-10-15 17:16:04,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:16:05,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2022-10-15 17:16:05,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:16:05,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2224 backedges. 0 proven. 1710 refuted. 0 times theorem prover too weak. 514 trivial. 0 not checked. [2022-10-15 17:16:05,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:16:05,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704889515] [2022-10-15 17:16:05,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704889515] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:16:05,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505329668] [2022-10-15 17:16:05,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 17:16:05,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:16:05,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:16:05,488 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:16:05,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-15 17:16:11,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-10-15 17:16:11,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:16:11,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 85 conjunts are in the unsatisfiable core [2022-10-15 17:16:11,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:16:12,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2224 backedges. 0 proven. 1710 refuted. 0 times theorem prover too weak. 514 trivial. 0 not checked. [2022-10-15 17:16:12,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:16:13,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2224 backedges. 0 proven. 1710 refuted. 0 times theorem prover too weak. 514 trivial. 0 not checked. [2022-10-15 17:16:13,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505329668] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:16:13,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:16:13,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 33 [2022-10-15 17:16:13,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610263926] [2022-10-15 17:16:13,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:16:13,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-10-15 17:16:13,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:16:13,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-10-15 17:16:13,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=974, Unknown=0, NotChecked=0, Total=1056 [2022-10-15 17:16:13,500 INFO L87 Difference]: Start difference. First operand 200 states and 224 transitions. Second operand has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 29 states have internal predecessors, (116), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-15 17:16:14,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:16:14,331 INFO L93 Difference]: Finished difference Result 689 states and 853 transitions. [2022-10-15 17:16:14,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-10-15 17:16:14,332 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 29 states have internal predecessors, (116), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 241 [2022-10-15 17:16:14,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:16:14,338 INFO L225 Difference]: With dead ends: 689 [2022-10-15 17:16:14,338 INFO L226 Difference]: Without dead ends: 689 [2022-10-15 17:16:14,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 483 SyntacticMatches, 13 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=1035, Unknown=0, NotChecked=0, Total=1122 [2022-10-15 17:16:14,340 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 81 mSDsluCounter, 3604 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 3756 SdHoareTripleChecker+Invalid, 1219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-15 17:16:14,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 3756 Invalid, 1219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-15 17:16:14,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2022-10-15 17:16:14,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 567. [2022-10-15 17:16:14,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 556 states have (on average 1.2122302158273381) internal successors, (674), 558 states have internal predecessors, (674), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-10-15 17:16:14,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 689 transitions. [2022-10-15 17:16:14,374 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 689 transitions. Word has length 241 [2022-10-15 17:16:14,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:16:14,374 INFO L495 AbstractCegarLoop]: Abstraction has 567 states and 689 transitions. [2022-10-15 17:16:14,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 29 states have internal predecessors, (116), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-15 17:16:14,375 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 689 transitions. [2022-10-15 17:16:14,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-10-15 17:16:14,380 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:16:14,380 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 29, 10, 10, 10, 10, 9, 9, 9, 9, 9, 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, 1] [2022-10-15 17:16:14,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-15 17:16:14,594 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,SelfDestructingSolverStorable14 [2022-10-15 17:16:14,594 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 17:16:14,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:16:14,595 INFO L85 PathProgramCache]: Analyzing trace with hash -395481353, now seen corresponding path program 1 times [2022-10-15 17:16:14,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:16:14,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832046104] [2022-10-15 17:16:14,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:16:14,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:16:15,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:16:23,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-10-15 17:16:23,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:16:23,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-10-15 17:16:23,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:16:24,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2022-10-15 17:16:24,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:16:25,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2224 backedges. 934 proven. 969 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2022-10-15 17:16:25,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:16:25,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832046104] [2022-10-15 17:16:25,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832046104] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:16:25,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561803397] [2022-10-15 17:16:25,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:16:25,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:16:25,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:16:25,255 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:16:25,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-10-15 17:16:25,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:16:25,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 824 conjuncts, 55 conjunts are in the unsatisfiable core [2022-10-15 17:16:25,584 INFO L286 TraceCheckSpWp]: Computing forward predicates...