/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/standard_init9_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 18:12:43,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 18:12:43,411 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 18:12:43,467 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 18:12:43,468 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 18:12:43,473 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 18:12:43,495 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 18:12:43,503 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 18:12:43,509 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 18:12:43,512 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 18:12:43,514 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 18:12:43,519 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 18:12:43,520 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 18:12:43,527 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 18:12:43,529 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 18:12:43,531 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 18:12:43,532 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 18:12:43,533 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 18:12:43,535 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 18:12:43,538 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 18:12:43,540 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 18:12:43,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 18:12:43,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 18:12:43,545 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 18:12:43,550 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-15 18:12:43,562 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 18:12:43,564 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 18:12:43,565 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 18:12:43,567 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-15 18:12:43,597 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 18:12:43,598 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 18:12:43,598 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 18:12:43,599 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 18:12:43,602 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 18:12:43,602 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 18:12:43,603 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 18:12:43,604 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 18:12:43,604 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 18:12:43,604 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 18:12:43,604 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 18:12:43,605 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 18:12:43,605 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 18:12:43,605 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 18:12:43,606 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 18:12:43,606 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 18:12:43,606 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 18:12:43,606 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 18:12:43,607 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 18:12:43,607 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 18:12:43,607 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 18:12:43,608 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 18:12:43,608 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 18:12:43,608 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 18:12:43,608 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 18:12:43,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 18:12:43,609 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 18:12:43,609 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 18:12:43,610 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 18:12:43,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 18:12:43,610 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 18:12:44,052 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 18:12:44,094 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 18:12:44,099 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 18:12:44,101 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 18:12:44,102 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 18:12:44,104 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_init9_ground-2.i [2022-10-15 18:12:44,184 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/313560c7b/3ae9c9a2867e4312994fd6ef8dd57647/FLAG2ff3439df [2022-10-15 18:12:44,894 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 18:12:44,895 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init9_ground-2.i [2022-10-15 18:12:44,908 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/313560c7b/3ae9c9a2867e4312994fd6ef8dd57647/FLAG2ff3439df [2022-10-15 18:12:45,291 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/313560c7b/3ae9c9a2867e4312994fd6ef8dd57647 [2022-10-15 18:12:45,295 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 18:12:45,303 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 18:12:45,310 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 18:12:45,311 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 18:12:45,316 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 18:12:45,318 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 06:12:45" (1/1) ... [2022-10-15 18:12:45,320 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6757847f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:12:45, skipping insertion in model container [2022-10-15 18:12:45,320 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 06:12:45" (1/1) ... [2022-10-15 18:12:45,329 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 18:12:45,357 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 18:12:45,622 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init9_ground-2.i[816,829] [2022-10-15 18:12:45,670 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 18:12:45,692 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 18:12:45,711 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init9_ground-2.i[816,829] [2022-10-15 18:12:45,751 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 18:12:45,785 INFO L208 MainTranslator]: Completed translation [2022-10-15 18:12:45,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:12:45 WrapperNode [2022-10-15 18:12:45,789 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 18:12:45,794 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 18:12:45,795 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 18:12:45,796 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 18:12:45,805 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:12:45" (1/1) ... [2022-10-15 18:12:45,825 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:12:45" (1/1) ... [2022-10-15 18:12:45,860 INFO L138 Inliner]: procedures = 15, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2022-10-15 18:12:45,861 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 18:12:45,862 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 18:12:45,862 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 18:12:45,862 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 18:12:45,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:12:45" (1/1) ... [2022-10-15 18:12:45,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:12:45" (1/1) ... [2022-10-15 18:12:45,874 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:12:45" (1/1) ... [2022-10-15 18:12:45,874 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:12:45" (1/1) ... [2022-10-15 18:12:45,881 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:12:45" (1/1) ... [2022-10-15 18:12:45,888 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:12:45" (1/1) ... [2022-10-15 18:12:45,890 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:12:45" (1/1) ... [2022-10-15 18:12:45,891 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:12:45" (1/1) ... [2022-10-15 18:12:45,894 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 18:12:45,895 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 18:12:45,895 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 18:12:45,895 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 18:12:45,896 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:12:45" (1/1) ... [2022-10-15 18:12:45,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 18:12:45,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:12:45,935 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-15 18:12:45,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-15 18:12:45,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 18:12:45,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 18:12:45,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 18:12:45,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 18:12:45,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 18:12:45,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 18:12:45,998 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 18:12:45,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 18:12:46,078 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 18:12:46,080 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 18:12:46,438 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 18:12:46,449 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 18:12:46,449 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-10-15 18:12:46,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 06:12:46 BoogieIcfgContainer [2022-10-15 18:12:46,453 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 18:12:46,458 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 18:12:46,458 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 18:12:46,463 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 18:12:46,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 06:12:45" (1/3) ... [2022-10-15 18:12:46,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a97d1c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 06:12:46, skipping insertion in model container [2022-10-15 18:12:46,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:12:45" (2/3) ... [2022-10-15 18:12:46,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a97d1c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 06:12:46, skipping insertion in model container [2022-10-15 18:12:46,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 06:12:46" (3/3) ... [2022-10-15 18:12:46,467 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_init9_ground-2.i [2022-10-15 18:12:46,496 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 18:12:46,497 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2022-10-15 18:12:46,603 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 18:12:46,620 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;@4c31d2c3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 18:12:46,621 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2022-10-15 18:12:46,628 INFO L276 IsEmpty]: Start isEmpty. Operand has 71 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 70 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:46,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 18:12:46,645 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:12:46,646 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 18:12:46,648 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 18:12:46,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:12:46,664 INFO L85 PathProgramCache]: Analyzing trace with hash 925797, now seen corresponding path program 1 times [2022-10-15 18:12:46,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:12:46,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803865866] [2022-10-15 18:12:46,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:12:46,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:12:46,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:12:47,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:12:47,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:12:47,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803865866] [2022-10-15 18:12:47,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803865866] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:12:47,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:12:47,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:12:47,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012763694] [2022-10-15 18:12:47,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:12:47,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:12:47,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:12:47,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:12:47,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:12:47,081 INFO L87 Difference]: Start difference. First operand has 71 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 70 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:47,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:12:47,192 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2022-10-15 18:12:47,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:12:47,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-15 18:12:47,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:12:47,205 INFO L225 Difference]: With dead ends: 61 [2022-10-15 18:12:47,206 INFO L226 Difference]: Without dead ends: 59 [2022-10-15 18:12:47,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:12:47,213 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 63 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:12:47,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 50 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:12:47,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-10-15 18:12:47,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-10-15 18:12:47,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.446808510638298) internal successors, (68), 58 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:47,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2022-10-15 18:12:47,264 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 4 [2022-10-15 18:12:47,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:12:47,264 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2022-10-15 18:12:47,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:47,265 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2022-10-15 18:12:47,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 18:12:47,265 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:12:47,266 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 18:12:47,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 18:12:47,266 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 18:12:47,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:12:47,268 INFO L85 PathProgramCache]: Analyzing trace with hash 925798, now seen corresponding path program 1 times [2022-10-15 18:12:47,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:12:47,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988165537] [2022-10-15 18:12:47,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:12:47,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:12:47,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:12:47,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:12:47,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:12:47,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988165537] [2022-10-15 18:12:47,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988165537] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:12:47,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:12:47,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:12:47,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213208311] [2022-10-15 18:12:47,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:12:47,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:12:47,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:12:47,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:12:47,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:12:47,395 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:47,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:12:47,505 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2022-10-15 18:12:47,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:12:47,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-15 18:12:47,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:12:47,507 INFO L225 Difference]: With dead ends: 62 [2022-10-15 18:12:47,508 INFO L226 Difference]: Without dead ends: 62 [2022-10-15 18:12:47,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:12:47,510 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:12:47,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 75 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:12:47,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-10-15 18:12:47,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2022-10-15 18:12:47,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 49 states have (on average 1.4285714285714286) internal successors, (70), 60 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:47,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2022-10-15 18:12:47,521 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 4 [2022-10-15 18:12:47,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:12:47,522 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2022-10-15 18:12:47,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:47,522 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2022-10-15 18:12:47,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-15 18:12:47,523 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:12:47,523 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2022-10-15 18:12:47,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 18:12:47,524 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 18:12:47,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:12:47,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1810599630, now seen corresponding path program 1 times [2022-10-15 18:12:47,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:12:47,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940716316] [2022-10-15 18:12:47,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:12:47,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:12:47,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:12:47,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:12:47,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:12:47,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940716316] [2022-10-15 18:12:47,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940716316] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:12:47,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171585660] [2022-10-15 18:12:47,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:12:47,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:12:47,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:12:47,719 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:12:47,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-15 18:12:47,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:12:47,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-15 18:12:47,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:12:47,919 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 18:12:47,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:12:47,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:12:48,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:12:48,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171585660] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:12:48,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:12:48,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-10-15 18:12:48,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298510989] [2022-10-15 18:12:48,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:12:48,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-15 18:12:48,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:12:48,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-15 18:12:48,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-10-15 18:12:48,065 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:48,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:12:48,304 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2022-10-15 18:12:48,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 18:12:48,305 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-15 18:12:48,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:12:48,308 INFO L225 Difference]: With dead ends: 72 [2022-10-15 18:12:48,308 INFO L226 Difference]: Without dead ends: 72 [2022-10-15 18:12:48,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-10-15 18:12:48,311 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 8 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 18:12:48,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 86 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 18:12:48,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-10-15 18:12:48,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2022-10-15 18:12:48,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 58 states have (on average 1.396551724137931) internal successors, (81), 69 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:48,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2022-10-15 18:12:48,322 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 7 [2022-10-15 18:12:48,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:12:48,323 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2022-10-15 18:12:48,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:48,324 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2022-10-15 18:12:48,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-15 18:12:48,324 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:12:48,325 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-15 18:12:48,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-15 18:12:48,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:12:48,540 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 18:12:48,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:12:48,542 INFO L85 PathProgramCache]: Analyzing trace with hash -65957008, now seen corresponding path program 1 times [2022-10-15 18:12:48,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:12:48,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837322933] [2022-10-15 18:12:48,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:12:48,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:12:48,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:12:48,778 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-15 18:12:48,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:12:48,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837322933] [2022-10-15 18:12:48,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837322933] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:12:48,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:12:48,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-15 18:12:48,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878857974] [2022-10-15 18:12:48,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:12:48,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 18:12:48,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:12:48,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 18:12:48,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 18:12:48,782 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:48,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:12:48,962 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2022-10-15 18:12:48,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 18:12:48,963 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-10-15 18:12:48,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:12:48,969 INFO L225 Difference]: With dead ends: 94 [2022-10-15 18:12:48,969 INFO L226 Difference]: Without dead ends: 94 [2022-10-15 18:12:48,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 18:12:48,979 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 71 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 18:12:48,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 40 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 18:12:48,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-10-15 18:12:48,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 86. [2022-10-15 18:12:49,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 74 states have (on average 1.3108108108108107) internal successors, (97), 85 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:49,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 97 transitions. [2022-10-15 18:12:49,006 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 97 transitions. Word has length 12 [2022-10-15 18:12:49,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:12:49,007 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 97 transitions. [2022-10-15 18:12:49,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:49,007 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 97 transitions. [2022-10-15 18:12:49,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-15 18:12:49,008 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:12:49,008 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:12:49,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-15 18:12:49,011 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 18:12:49,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:12:49,013 INFO L85 PathProgramCache]: Analyzing trace with hash -2125198987, now seen corresponding path program 1 times [2022-10-15 18:12:49,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:12:49,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412559287] [2022-10-15 18:12:49,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:12:49,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:12:49,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:12:49,130 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:12:49,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:12:49,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412559287] [2022-10-15 18:12:49,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412559287] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:12:49,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045983923] [2022-10-15 18:12:49,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:12:49,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:12:49,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:12:49,133 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:12:49,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-15 18:12:49,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:12:49,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-15 18:12:49,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:12:49,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:12:49,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:12:49,291 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:12:49,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045983923] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:12:49,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:12:49,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-10-15 18:12:49,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100225056] [2022-10-15 18:12:49,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:12:49,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-15 18:12:49,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:12:49,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-15 18:12:49,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-10-15 18:12:49,298 INFO L87 Difference]: Start difference. First operand 86 states and 97 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:49,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:12:49,691 INFO L93 Difference]: Finished difference Result 236 states and 245 transitions. [2022-10-15 18:12:49,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-15 18:12:49,692 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-10-15 18:12:49,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:12:49,695 INFO L225 Difference]: With dead ends: 236 [2022-10-15 18:12:49,695 INFO L226 Difference]: Without dead ends: 236 [2022-10-15 18:12:49,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 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 18:12:49,699 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 190 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 18:12:49,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 102 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 18:12:49,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-10-15 18:12:49,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 203. [2022-10-15 18:12:49,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 191 states have (on average 1.2827225130890052) internal successors, (245), 202 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:49,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 245 transitions. [2022-10-15 18:12:49,716 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 245 transitions. Word has length 15 [2022-10-15 18:12:49,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:12:49,716 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 245 transitions. [2022-10-15 18:12:49,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:49,717 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 245 transitions. [2022-10-15 18:12:49,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-10-15 18:12:49,717 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:12:49,718 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1] [2022-10-15 18:12:49,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-15 18:12:49,927 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 18:12:49,928 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 18:12:49,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:12:49,930 INFO L85 PathProgramCache]: Analyzing trace with hash -278008218, now seen corresponding path program 2 times [2022-10-15 18:12:49,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:12:49,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635425652] [2022-10-15 18:12:49,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:12:49,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:12:49,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:12:50,135 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:12:50,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:12:50,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635425652] [2022-10-15 18:12:50,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635425652] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:12:50,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537907985] [2022-10-15 18:12:50,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:12:50,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:12:50,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:12:50,138 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:12:50,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-15 18:12:50,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 18:12:50,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:12:50,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-15 18:12:50,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:12:50,219 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 18:12:50,404 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:12:50,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:12:50,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537907985] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:12:50,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:12:50,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2022-10-15 18:12:50,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448039711] [2022-10-15 18:12:50,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:12:50,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-15 18:12:50,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:12:50,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-15 18:12:50,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-10-15 18:12:50,407 INFO L87 Difference]: Start difference. First operand 203 states and 245 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:50,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:12:50,768 INFO L93 Difference]: Finished difference Result 202 states and 227 transitions. [2022-10-15 18:12:50,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-15 18:12:50,769 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-10-15 18:12:50,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:12:50,770 INFO L225 Difference]: With dead ends: 202 [2022-10-15 18:12:50,770 INFO L226 Difference]: Without dead ends: 202 [2022-10-15 18:12:50,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-10-15 18:12:50,772 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 151 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 18:12:50,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 31 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 18:12:50,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-10-15 18:12:50,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2022-10-15 18:12:50,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 191 states have (on average 1.1884816753926701) internal successors, (227), 201 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:50,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 227 transitions. [2022-10-15 18:12:50,785 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 227 transitions. Word has length 16 [2022-10-15 18:12:50,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:12:50,786 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 227 transitions. [2022-10-15 18:12:50,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:50,786 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 227 transitions. [2022-10-15 18:12:50,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-10-15 18:12:50,787 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:12:50,787 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:12:50,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-15 18:12:51,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:12:51,003 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 18:12:51,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:12:51,004 INFO L85 PathProgramCache]: Analyzing trace with hash -2086175883, now seen corresponding path program 2 times [2022-10-15 18:12:51,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:12:51,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053808268] [2022-10-15 18:12:51,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:12:51,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:12:51,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:12:51,192 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:12:51,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:12:51,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053808268] [2022-10-15 18:12:51,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053808268] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:12:51,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456968143] [2022-10-15 18:12:51,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:12:51,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:12:51,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:12:51,195 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:12:51,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-15 18:12:51,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 18:12:51,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:12:51,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-15 18:12:51,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:12:51,320 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:12:51,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:12:51,430 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:12:51,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456968143] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:12:51,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:12:51,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-10-15 18:12:51,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949100930] [2022-10-15 18:12:51,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:12:51,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-15 18:12:51,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:12:51,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-15 18:12:51,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-15 18:12:51,436 INFO L87 Difference]: Start difference. First operand 202 states and 227 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:52,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:12:52,247 INFO L93 Difference]: Finished difference Result 434 states and 443 transitions. [2022-10-15 18:12:52,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-15 18:12:52,248 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-10-15 18:12:52,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:12:52,251 INFO L225 Difference]: With dead ends: 434 [2022-10-15 18:12:52,251 INFO L226 Difference]: Without dead ends: 434 [2022-10-15 18:12:52,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-15 18:12:52,253 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 740 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 740 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-15 18:12:52,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [740 Valid, 74 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-15 18:12:52,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-10-15 18:12:52,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 418. [2022-10-15 18:12:52,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 407 states have (on average 1.0884520884520885) internal successors, (443), 417 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:52,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 443 transitions. [2022-10-15 18:12:52,274 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 443 transitions. Word has length 27 [2022-10-15 18:12:52,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:12:52,275 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 443 transitions. [2022-10-15 18:12:52,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:52,275 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 443 transitions. [2022-10-15 18:12:52,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-10-15 18:12:52,277 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:12:52,277 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:12:52,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-15 18:12:52,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:12:52,492 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 18:12:52,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:12:52,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1979539317, now seen corresponding path program 3 times [2022-10-15 18:12:52,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:12:52,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894553207] [2022-10-15 18:12:52,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:12:52,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:12:52,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:12:52,927 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:12:52,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:12:52,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894553207] [2022-10-15 18:12:52,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894553207] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:12:52,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604643563] [2022-10-15 18:12:52,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 18:12:52,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:12:52,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:12:52,933 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:12:52,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-15 18:12:53,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-15 18:12:53,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:12:53,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-15 18:12:53,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:12:53,032 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 18:12:53,297 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-10-15 18:12:53,298 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:12:53,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604643563] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:12:53,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:12:53,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [17] total 21 [2022-10-15 18:12:53,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029167702] [2022-10-15 18:12:53,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:12:53,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-15 18:12:53,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:12:53,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-15 18:12:53,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2022-10-15 18:12:53,301 INFO L87 Difference]: Start difference. First operand 418 states and 443 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:53,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:12:53,436 INFO L93 Difference]: Finished difference Result 410 states and 419 transitions. [2022-10-15 18:12:53,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-15 18:12:53,437 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 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 51 [2022-10-15 18:12:53,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:12:53,439 INFO L225 Difference]: With dead ends: 410 [2022-10-15 18:12:53,440 INFO L226 Difference]: Without dead ends: 410 [2022-10-15 18:12:53,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2022-10-15 18:12:53,441 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 86 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:12:53,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 31 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:12:53,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-10-15 18:12:53,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 410. [2022-10-15 18:12:53,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 407 states have (on average 1.0294840294840295) internal successors, (419), 409 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:53,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 419 transitions. [2022-10-15 18:12:53,455 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 419 transitions. Word has length 51 [2022-10-15 18:12:53,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:12:53,455 INFO L495 AbstractCegarLoop]: Abstraction has 410 states and 419 transitions. [2022-10-15 18:12:53,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:53,456 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 419 transitions. [2022-10-15 18:12:53,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2022-10-15 18:12:53,465 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:12:53,466 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 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 18:12:53,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-15 18:12:53,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:12:53,682 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 18:12:53,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:12:53,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1623679840, now seen corresponding path program 1 times [2022-10-15 18:12:53,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:12:53,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956091025] [2022-10-15 18:12:53,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:12:53,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:12:53,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:12:55,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2583 trivial. 0 not checked. [2022-10-15 18:12:55,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:12:55,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956091025] [2022-10-15 18:12:55,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956091025] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:12:55,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:12:55,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-15 18:12:55,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030353684] [2022-10-15 18:12:55,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:12:55,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 18:12:55,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:12:55,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 18:12:55,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 18:12:55,626 INFO L87 Difference]: Start difference. First operand 410 states and 419 transitions. Second operand has 4 states, 3 states have (on average 16.333333333333332) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:55,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:12:55,660 INFO L93 Difference]: Finished difference Result 418 states and 427 transitions. [2022-10-15 18:12:55,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 18:12:55,660 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 16.333333333333332) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 400 [2022-10-15 18:12:55,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:12:55,664 INFO L225 Difference]: With dead ends: 418 [2022-10-15 18:12:55,665 INFO L226 Difference]: Without dead ends: 418 [2022-10-15 18:12:55,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 18:12:55,666 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 24 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:12:55,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 86 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:12:55,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-10-15 18:12:55,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 412. [2022-10-15 18:12:55,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 409 states have (on average 1.0293398533007334) internal successors, (421), 411 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:55,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 421 transitions. [2022-10-15 18:12:55,677 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 421 transitions. Word has length 400 [2022-10-15 18:12:55,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:12:55,678 INFO L495 AbstractCegarLoop]: Abstraction has 412 states and 421 transitions. [2022-10-15 18:12:55,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 16.333333333333332) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:55,679 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 421 transitions. [2022-10-15 18:12:55,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2022-10-15 18:12:55,685 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:12:55,686 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 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 18:12:55,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-15 18:12:55,686 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 18:12:55,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:12:55,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1124319541, now seen corresponding path program 1 times [2022-10-15 18:12:55,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:12:55,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039916905] [2022-10-15 18:12:55,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:12:55,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:12:55,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:12:57,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2296 trivial. 0 not checked. [2022-10-15 18:12:57,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:12:57,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039916905] [2022-10-15 18:12:57,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039916905] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:12:57,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765607461] [2022-10-15 18:12:57,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:12:57,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:12:57,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:12:57,417 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:12:57,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-15 18:12:57,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:12:57,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 1463 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-15 18:12:57,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:12:57,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2296 trivial. 0 not checked. [2022-10-15 18:12:57,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:12:58,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2296 trivial. 0 not checked. [2022-10-15 18:12:58,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765607461] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:12:58,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:12:58,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-10-15 18:12:58,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586489593] [2022-10-15 18:12:58,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:12:58,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-10-15 18:12:58,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:12:58,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-10-15 18:12:58,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-10-15 18:12:58,278 INFO L87 Difference]: Start difference. First operand 412 states and 421 transitions. Second operand has 33 states, 33 states have (on average 4.212121212121212) internal successors, (139), 33 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:59,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:12:59,940 INFO L93 Difference]: Finished difference Result 844 states and 853 transitions. [2022-10-15 18:12:59,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-10-15 18:12:59,941 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.212121212121212) internal successors, (139), 33 states have internal predecessors, (139), 0 states have call successors, (0), 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 403 [2022-10-15 18:12:59,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:12:59,953 INFO L225 Difference]: With dead ends: 844 [2022-10-15 18:12:59,953 INFO L226 Difference]: Without dead ends: 844 [2022-10-15 18:12:59,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 821 GetRequests, 790 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-10-15 18:12:59,959 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1820 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 1037 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1820 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 1883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1037 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-10-15 18:12:59,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1820 Valid, 74 Invalid, 1883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1037 Valid, 846 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-10-15 18:12:59,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2022-10-15 18:12:59,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 844. [2022-10-15 18:12:59,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 841 states have (on average 1.014268727705113) internal successors, (853), 843 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:59,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 853 transitions. [2022-10-15 18:12:59,983 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 853 transitions. Word has length 403 [2022-10-15 18:12:59,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:12:59,983 INFO L495 AbstractCegarLoop]: Abstraction has 844 states and 853 transitions. [2022-10-15 18:12:59,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.212121212121212) internal successors, (139), 33 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:12:59,984 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 853 transitions. [2022-10-15 18:13:00,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 836 [2022-10-15 18:13:00,008 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:13:00,009 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 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 18:13:00,054 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 18:13:00,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:13:00,224 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 18:13:00,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:13:00,226 INFO L85 PathProgramCache]: Analyzing trace with hash -34239797, now seen corresponding path program 2 times [2022-10-15 18:13:00,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:13:00,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194004732] [2022-10-15 18:13:00,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:13:00,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:13:00,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:13:05,825 INFO L134 CoverageAnalysis]: Checked inductivity of 12015 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 10680 trivial. 0 not checked. [2022-10-15 18:13:05,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:13:05,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194004732] [2022-10-15 18:13:05,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194004732] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:13:05,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775988356] [2022-10-15 18:13:05,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:13:05,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:13:05,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:13:05,828 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:13:05,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-15 18:13:06,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 18:13:06,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:13:06,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 3047 conjuncts, 32 conjunts are in the unsatisfiable core [2022-10-15 18:13:06,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:13:06,687 INFO L134 CoverageAnalysis]: Checked inductivity of 12015 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 10680 trivial. 0 not checked. [2022-10-15 18:13:06,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:13:08,234 INFO L134 CoverageAnalysis]: Checked inductivity of 12015 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 10680 trivial. 0 not checked. [2022-10-15 18:13:08,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775988356] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:13:08,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:13:08,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2022-10-15 18:13:08,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130482059] [2022-10-15 18:13:08,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:13:08,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-10-15 18:13:08,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:13:08,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-10-15 18:13:08,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-10-15 18:13:08,244 INFO L87 Difference]: Start difference. First operand 844 states and 853 transitions. Second operand has 65 states, 65 states have (on average 3.6153846153846154) internal successors, (235), 65 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:13:13,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:13:13,018 INFO L93 Difference]: Finished difference Result 1708 states and 1717 transitions. [2022-10-15 18:13:13,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-10-15 18:13:13,018 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.6153846153846154) internal successors, (235), 65 states have internal predecessors, (235), 0 states have call successors, (0), 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 835 [2022-10-15 18:13:13,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:13:13,024 INFO L225 Difference]: With dead ends: 1708 [2022-10-15 18:13:13,025 INFO L226 Difference]: Without dead ends: 1708 [2022-10-15 18:13:13,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1701 GetRequests, 1638 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-10-15 18:13:13,028 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 4346 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 1701 mSolverCounterSat, 2382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4346 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 4083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2382 IncrementalHoareTripleChecker+Valid, 1701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-10-15 18:13:13,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4346 Valid, 60 Invalid, 4083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2382 Valid, 1701 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-10-15 18:13:13,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2022-10-15 18:13:13,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1708. [2022-10-15 18:13:13,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1705 states have (on average 1.0070381231671555) internal successors, (1717), 1707 states have internal predecessors, (1717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:13:13,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 1717 transitions. [2022-10-15 18:13:13,060 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 1717 transitions. Word has length 835 [2022-10-15 18:13:13,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:13:13,060 INFO L495 AbstractCegarLoop]: Abstraction has 1708 states and 1717 transitions. [2022-10-15 18:13:13,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.6153846153846154) internal successors, (235), 65 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:13:13,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 1717 transitions. [2022-10-15 18:13:13,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1700 [2022-10-15 18:13:13,123 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:13:13,124 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 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 18:13:13,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-15 18:13:13,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:13:13,325 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-15 18:13:13,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:13:13,327 INFO L85 PathProgramCache]: Analyzing trace with hash -79682869, now seen corresponding path program 3 times [2022-10-15 18:13:13,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:13:13,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005291409] [2022-10-15 18:13:13,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:13:13,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:13:14,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:13:29,549 INFO L134 CoverageAnalysis]: Checked inductivity of 51615 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 45880 trivial. 0 not checked. [2022-10-15 18:13:29,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:13:29,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005291409] [2022-10-15 18:13:29,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005291409] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:13:29,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103256578] [2022-10-15 18:13:29,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 18:13:29,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:13:29,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:13:29,552 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:13:29,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process