/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-cav19/array_init_pair_symmetr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 16:14:37,979 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 16:14:37,982 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 16:14:38,018 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 16:14:38,018 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 16:14:38,020 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 16:14:38,022 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 16:14:38,024 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 16:14:38,027 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 16:14:38,028 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 16:14:38,029 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 16:14:38,031 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 16:14:38,031 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 16:14:38,033 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 16:14:38,037 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 16:14:38,039 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 16:14:38,042 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 16:14:38,043 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 16:14:38,047 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 16:14:38,051 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 16:14:38,058 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 16:14:38,059 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 16:14:38,073 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 16:14:38,074 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 16:14:38,077 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-15 16:14:38,099 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 16:14:38,100 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 16:14:38,100 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 16:14:38,101 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 16:14:38,137 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 16:14:38,137 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 16:14:38,138 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 16:14:38,138 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 16:14:38,139 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 16:14:38,139 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 16:14:38,140 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 16:14:38,141 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 16:14:38,141 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 16:14:38,141 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 16:14:38,141 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 16:14:38,143 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 16:14:38,143 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 16:14:38,144 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 16:14:38,144 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 16:14:38,144 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 16:14:38,144 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 16:14:38,144 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 16:14:38,145 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 16:14:38,145 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 16:14:38,145 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 16:14:38,145 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 16:14:38,146 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 16:14:38,146 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 16:14:38,146 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 16:14:38,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 16:14:38,147 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 16:14:38,147 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 16:14:38,148 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 16:14:38,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 16:14:38,148 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 16:14:38,560 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 16:14:38,587 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 16:14:38,590 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 16:14:38,592 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 16:14:38,595 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 16:14:38,596 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c [2022-10-15 16:14:38,690 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/423af9159/e1a4323c93564912b28fe75ad175d623/FLAG216adaad9 [2022-10-15 16:14:39,351 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 16:14:39,352 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c [2022-10-15 16:14:39,361 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/423af9159/e1a4323c93564912b28fe75ad175d623/FLAG216adaad9 [2022-10-15 16:14:39,689 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/423af9159/e1a4323c93564912b28fe75ad175d623 [2022-10-15 16:14:39,692 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 16:14:39,697 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 16:14:39,699 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 16:14:39,699 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 16:14:39,704 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 16:14:39,705 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:14:39" (1/1) ... [2022-10-15 16:14:39,706 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dac67f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:14:39, skipping insertion in model container [2022-10-15 16:14:39,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:14:39" (1/1) ... [2022-10-15 16:14:39,715 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 16:14:39,730 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 16:14:39,891 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-cav19/array_init_pair_symmetr.c[414,427] [2022-10-15 16:14:39,914 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 16:14:39,924 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 16:14:39,940 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-cav19/array_init_pair_symmetr.c[414,427] [2022-10-15 16:14:39,949 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 16:14:39,967 INFO L208 MainTranslator]: Completed translation [2022-10-15 16:14:39,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:14:39 WrapperNode [2022-10-15 16:14:39,967 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 16:14:39,969 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 16:14:39,969 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 16:14:39,969 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 16:14:39,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:14:39" (1/1) ... [2022-10-15 16:14:39,988 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:14:39" (1/1) ... [2022-10-15 16:14:40,013 INFO L138 Inliner]: procedures = 15, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2022-10-15 16:14:40,014 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 16:14:40,015 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 16:14:40,015 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 16:14:40,015 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 16:14:40,027 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:14:39" (1/1) ... [2022-10-15 16:14:40,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:14:39" (1/1) ... [2022-10-15 16:14:40,030 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:14:39" (1/1) ... [2022-10-15 16:14:40,031 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:14:39" (1/1) ... [2022-10-15 16:14:40,037 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:14:39" (1/1) ... [2022-10-15 16:14:40,042 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:14:39" (1/1) ... [2022-10-15 16:14:40,043 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:14:39" (1/1) ... [2022-10-15 16:14:40,045 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:14:39" (1/1) ... [2022-10-15 16:14:40,047 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 16:14:40,048 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 16:14:40,048 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 16:14:40,049 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 16:14:40,050 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:14:39" (1/1) ... [2022-10-15 16:14:40,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 16:14:40,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:14:40,094 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 16:14:40,117 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 16:14:40,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 16:14:40,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 16:14:40,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 16:14:40,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 16:14:40,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 16:14:40,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 16:14:40,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 16:14:40,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 16:14:40,315 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 16:14:40,319 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 16:14:40,745 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 16:14:40,761 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 16:14:40,765 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-10-15 16:14:40,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:14:40 BoogieIcfgContainer [2022-10-15 16:14:40,768 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 16:14:40,774 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 16:14:40,778 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 16:14:40,785 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 16:14:40,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 04:14:39" (1/3) ... [2022-10-15 16:14:40,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@602bedff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:14:40, skipping insertion in model container [2022-10-15 16:14:40,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:14:39" (2/3) ... [2022-10-15 16:14:40,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@602bedff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:14:40, skipping insertion in model container [2022-10-15 16:14:40,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:14:40" (3/3) ... [2022-10-15 16:14:40,798 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_pair_symmetr.c [2022-10-15 16:14:40,852 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 16:14:40,852 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2022-10-15 16:14:40,950 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 16:14:40,966 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;@44fa7237, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 16:14:40,966 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2022-10-15 16:14:40,980 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 40 states have internal predecessors, (48), 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 16:14:41,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-10-15 16:14:41,006 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:14:41,008 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-10-15 16:14:41,010 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 16:14:41,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:14:41,021 INFO L85 PathProgramCache]: Analyzing trace with hash 889618106, now seen corresponding path program 1 times [2022-10-15 16:14:41,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:14:41,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602429829] [2022-10-15 16:14:41,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:14:41,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:14:41,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:14:41,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:14:41,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:14:41,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602429829] [2022-10-15 16:14:41,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602429829] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:14:41,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:14:41,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-15 16:14:41,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323602644] [2022-10-15 16:14:41,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:14:41,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 16:14:41,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:14:41,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 16:14:41,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 16:14:41,540 INFO L87 Difference]: Start difference. First operand has 41 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 40 states have internal predecessors, (48), 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 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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 16:14:41,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:14:41,665 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2022-10-15 16:14:41,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 16:14:41,668 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2022-10-15 16:14:41,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:14:41,679 INFO L225 Difference]: With dead ends: 63 [2022-10-15 16:14:41,679 INFO L226 Difference]: Without dead ends: 61 [2022-10-15 16:14:41,681 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 16:14:41,686 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 61 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:14:41,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 42 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:14:41,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-10-15 16:14:41,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 41. [2022-10-15 16:14:41,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 40 states have internal predecessors, (43), 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 16:14:41,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2022-10-15 16:14:41,736 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 6 [2022-10-15 16:14:41,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:14:41,737 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2022-10-15 16:14:41,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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 16:14:41,738 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2022-10-15 16:14:41,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-10-15 16:14:41,738 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:14:41,738 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-10-15 16:14:41,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 16:14:41,739 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 16:14:41,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:14:41,740 INFO L85 PathProgramCache]: Analyzing trace with hash 889663594, now seen corresponding path program 1 times [2022-10-15 16:14:41,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:14:41,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713104393] [2022-10-15 16:14:41,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:14:41,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:14:41,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:14:42,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:14:42,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:14:42,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713104393] [2022-10-15 16:14:42,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713104393] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:14:42,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:14:42,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 16:14:42,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550960773] [2022-10-15 16:14:42,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:14:42,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 16:14:42,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:14:42,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 16:14:42,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 16:14:42,185 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 16:14:42,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:14:42,248 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2022-10-15 16:14:42,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 16:14:42,249 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2022-10-15 16:14:42,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:14:42,250 INFO L225 Difference]: With dead ends: 39 [2022-10-15 16:14:42,250 INFO L226 Difference]: Without dead ends: 39 [2022-10-15 16:14:42,254 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 16:14:42,256 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 32 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:14:42,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 26 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:14:42,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-10-15 16:14:42,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-10-15 16:14:42,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 38 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:14:42,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2022-10-15 16:14:42,274 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 6 [2022-10-15 16:14:42,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:14:42,274 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2022-10-15 16:14:42,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 16:14:42,275 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2022-10-15 16:14:42,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-10-15 16:14:42,280 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:14:42,280 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-10-15 16:14:42,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 16:14:42,281 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 16:14:42,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:14:42,282 INFO L85 PathProgramCache]: Analyzing trace with hash 889663595, now seen corresponding path program 1 times [2022-10-15 16:14:42,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:14:42,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525510394] [2022-10-15 16:14:42,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:14:42,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:14:42,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:14:42,698 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 16:14:42,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:14:42,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525510394] [2022-10-15 16:14:42,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525510394] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:14:42,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:14:42,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-15 16:14:42,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653472092] [2022-10-15 16:14:42,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:14:42,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-15 16:14:42,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:14:42,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-15 16:14:42,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-15 16:14:42,707 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 16:14:42,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:14:42,865 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2022-10-15 16:14:42,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 16:14:42,866 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2022-10-15 16:14:42,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:14:42,868 INFO L225 Difference]: With dead ends: 46 [2022-10-15 16:14:42,868 INFO L226 Difference]: Without dead ends: 46 [2022-10-15 16:14:42,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-15 16:14:42,877 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 52 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:14:42,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 54 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:14:42,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-10-15 16:14:42,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2022-10-15 16:14:42,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 41 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:14:42,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2022-10-15 16:14:42,896 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 6 [2022-10-15 16:14:42,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:14:42,896 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2022-10-15 16:14:42,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 16:14:42,897 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2022-10-15 16:14:42,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-15 16:14:42,898 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:14:42,898 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:14:42,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-15 16:14:42,899 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 16:14:42,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:14:42,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1809767629, now seen corresponding path program 1 times [2022-10-15 16:14:42,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:14:42,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465967424] [2022-10-15 16:14:42,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:14:42,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:14:42,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:14:42,984 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 16:14:42,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:14:42,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465967424] [2022-10-15 16:14:42,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465967424] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:14:42,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:14:42,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 16:14:42,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497104480] [2022-10-15 16:14:42,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:14:42,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 16:14:42,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:14:42,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 16:14:42,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 16:14:42,987 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:14:43,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:14:43,010 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2022-10-15 16:14:43,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 16:14:43,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-15 16:14:43,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:14:43,012 INFO L225 Difference]: With dead ends: 40 [2022-10-15 16:14:43,012 INFO L226 Difference]: Without dead ends: 40 [2022-10-15 16:14:43,013 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 16:14:43,014 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 16:14:43,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 26 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 16:14:43,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-10-15 16:14:43,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-10-15 16:14:43,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.4) internal successors, (42), 39 states have internal predecessors, (42), 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 16:14:43,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-10-15 16:14:43,021 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 7 [2022-10-15 16:14:43,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:14:43,022 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-10-15 16:14:43,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:14:43,023 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-10-15 16:14:43,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-15 16:14:43,023 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:14:43,023 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:14:43,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-15 16:14:43,024 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 16:14:43,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:14:43,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1809767630, now seen corresponding path program 1 times [2022-10-15 16:14:43,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:14:43,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404282867] [2022-10-15 16:14:43,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:14:43,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:14:43,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:14:43,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:14:43,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:14:43,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404282867] [2022-10-15 16:14:43,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404282867] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:14:43,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:14:43,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 16:14:43,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739840197] [2022-10-15 16:14:43,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:14:43,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 16:14:43,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:14:43,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 16:14:43,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-15 16:14:43,178 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:14:43,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:14:43,261 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2022-10-15 16:14:43,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 16:14:43,261 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-15 16:14:43,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:14:43,262 INFO L225 Difference]: With dead ends: 42 [2022-10-15 16:14:43,262 INFO L226 Difference]: Without dead ends: 42 [2022-10-15 16:14:43,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-15 16:14:43,264 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 42 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:14:43,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 38 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:14:43,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-10-15 16:14:43,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-10-15 16:14:43,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 40 states have internal predecessors, (43), 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 16:14:43,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2022-10-15 16:14:43,271 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 7 [2022-10-15 16:14:43,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:14:43,271 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2022-10-15 16:14:43,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:14:43,272 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2022-10-15 16:14:43,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-15 16:14:43,272 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:14:43,273 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:14:43,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-15 16:14:43,273 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 16:14:43,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:14:43,274 INFO L85 PathProgramCache]: Analyzing trace with hash 378249925, now seen corresponding path program 1 times [2022-10-15 16:14:43,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:14:43,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051610980] [2022-10-15 16:14:43,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:14:43,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:14:43,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:14:43,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:14:43,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:14:43,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051610980] [2022-10-15 16:14:43,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051610980] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:14:43,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549428698] [2022-10-15 16:14:43,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:14:43,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:14:43,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:14:43,415 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 16:14:43,419 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 16:14:43,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:14:43,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-15 16:14:43,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:14:43,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:14:43,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:14:43,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:14:43,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549428698] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:14:43,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:14:43,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2022-10-15 16:14:43,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812375848] [2022-10-15 16:14:43,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:14:43,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-15 16:14:43,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:14:43,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-15 16:14:43,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-10-15 16:14:43,710 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:14:44,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:14:44,040 INFO L93 Difference]: Finished difference Result 109 states and 111 transitions. [2022-10-15 16:14:44,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-15 16:14:44,041 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-10-15 16:14:44,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:14:44,042 INFO L225 Difference]: With dead ends: 109 [2022-10-15 16:14:44,042 INFO L226 Difference]: Without dead ends: 109 [2022-10-15 16:14:44,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2022-10-15 16:14:44,044 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 328 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 16:14:44,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 70 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 16:14:44,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-10-15 16:14:44,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2022-10-15 16:14:44,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 76 states have (on average 1.4342105263157894) internal successors, (109), 85 states have internal predecessors, (109), 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 16:14:44,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 109 transitions. [2022-10-15 16:14:44,056 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 109 transitions. Word has length 12 [2022-10-15 16:14:44,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:14:44,056 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 109 transitions. [2022-10-15 16:14:44,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:14:44,057 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 109 transitions. [2022-10-15 16:14:44,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-15 16:14:44,058 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:14:44,058 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-15 16:14:44,101 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 16:14:44,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-10-15 16:14:44,272 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 16:14:44,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:14:44,274 INFO L85 PathProgramCache]: Analyzing trace with hash 378295413, now seen corresponding path program 1 times [2022-10-15 16:14:44,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:14:44,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429579570] [2022-10-15 16:14:44,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:14:44,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:14:44,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:14:44,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:14:44,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:14:44,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429579570] [2022-10-15 16:14:44,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429579570] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:14:44,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173391892] [2022-10-15 16:14:44,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:14:44,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:14:44,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:14:44,563 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 16:14:44,572 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 16:14:44,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:14:44,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2022-10-15 16:14:44,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:14:44,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 16:14:44,790 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-10-15 16:14:44,792 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 24 [2022-10-15 16:14:44,808 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-15 16:14:44,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:14:44,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:14:45,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-15 16:14:45,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-15 16:14:45,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:14:45,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173391892] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:14:45,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:14:45,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 9 [2022-10-15 16:14:45,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389132003] [2022-10-15 16:14:45,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:14:45,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-15 16:14:45,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:14:45,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-15 16:14:45,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-10-15 16:14:45,164 INFO L87 Difference]: Start difference. First operand 86 states and 109 transitions. Second operand has 11 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 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 16:14:45,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:14:45,352 INFO L93 Difference]: Finished difference Result 91 states and 110 transitions. [2022-10-15 16:14:45,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-15 16:14:45,353 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 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 16:14:45,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:14:45,359 INFO L225 Difference]: With dead ends: 91 [2022-10-15 16:14:45,360 INFO L226 Difference]: Without dead ends: 91 [2022-10-15 16:14:45,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-10-15 16:14:45,364 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 73 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:14:45,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 60 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:14:45,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-10-15 16:14:45,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2022-10-15 16:14:45,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 79 states have (on average 1.3924050632911393) internal successors, (110), 88 states have internal predecessors, (110), 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 16:14:45,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 110 transitions. [2022-10-15 16:14:45,373 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 110 transitions. Word has length 12 [2022-10-15 16:14:45,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:14:45,374 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 110 transitions. [2022-10-15 16:14:45,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 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 16:14:45,375 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 110 transitions. [2022-10-15 16:14:45,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-10-15 16:14:45,375 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:14:45,375 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-10-15 16:14:45,413 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 16:14:45,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-10-15 16:14:45,590 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 16:14:45,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:14:45,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1157744124, now seen corresponding path program 1 times [2022-10-15 16:14:45,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:14:45,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918437158] [2022-10-15 16:14:45,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:14:45,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:14:45,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:14:45,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:14:45,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:14:45,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918437158] [2022-10-15 16:14:45,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918437158] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:14:45,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581550833] [2022-10-15 16:14:45,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:14:45,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:14:45,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:14:45,784 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 16:14:45,807 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 16:14:45,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:14:45,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-15 16:14:45,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:14:45,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 16:14:45,937 INFO L356 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-10-15 16:14:45,937 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2022-10-15 16:14:45,952 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 94 [2022-10-15 16:14:46,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:14:46,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:14:46,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-15 16:14:46,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:14:46,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581550833] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:14:46,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:14:46,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-10-15 16:14:46,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984114693] [2022-10-15 16:14:46,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:14:46,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-15 16:14:46,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:14:46,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-15 16:14:46,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-10-15 16:14:46,214 INFO L87 Difference]: Start difference. First operand 89 states and 110 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 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 16:14:46,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:14:46,369 INFO L93 Difference]: Finished difference Result 90 states and 109 transitions. [2022-10-15 16:14:46,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-15 16:14:46,372 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-10-15 16:14:46,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:14:46,373 INFO L225 Difference]: With dead ends: 90 [2022-10-15 16:14:46,373 INFO L226 Difference]: Without dead ends: 90 [2022-10-15 16:14:46,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-10-15 16:14:46,375 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 63 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:14:46,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 59 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:14:46,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-10-15 16:14:46,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-10-15 16:14:46,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 80 states have (on average 1.3625) internal successors, (109), 89 states have internal predecessors, (109), 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 16:14:46,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 109 transitions. [2022-10-15 16:14:46,402 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 109 transitions. Word has length 13 [2022-10-15 16:14:46,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:14:46,403 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 109 transitions. [2022-10-15 16:14:46,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 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 16:14:46,403 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 109 transitions. [2022-10-15 16:14:46,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-10-15 16:14:46,404 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:14:46,407 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1] [2022-10-15 16:14:46,446 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 16:14:46,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:14:46,609 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 16:14:46,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:14:46,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1516118931, now seen corresponding path program 2 times [2022-10-15 16:14:46,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:14:46,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627802346] [2022-10-15 16:14:46,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:14:46,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:14:46,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:14:47,273 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:14:47,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:14:47,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627802346] [2022-10-15 16:14:47,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627802346] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:14:47,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074828601] [2022-10-15 16:14:47,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 16:14:47,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:14:47,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:14:47,276 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 16:14:47,287 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 16:14:47,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 16:14:47,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:14:47,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-15 16:14:47,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:14:47,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 16:14:47,425 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-10-15 16:14:47,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 24 [2022-10-15 16:14:47,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-15 16:14:47,740 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 40 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:14:47,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:14:48,327 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 36 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:14:48,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074828601] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:14:48,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:14:48,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 19 [2022-10-15 16:14:48,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338216967] [2022-10-15 16:14:48,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:14:48,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-10-15 16:14:48,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:14:48,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-10-15 16:14:48,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2022-10-15 16:14:48,330 INFO L87 Difference]: Start difference. First operand 90 states and 109 transitions. Second operand has 20 states, 19 states have (on average 4.684210526315789) internal successors, (89), 20 states have internal predecessors, (89), 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 16:14:48,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:14:48,883 INFO L93 Difference]: Finished difference Result 158 states and 166 transitions. [2022-10-15 16:14:48,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-15 16:14:48,884 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.684210526315789) internal successors, (89), 20 states have internal predecessors, (89), 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 30 [2022-10-15 16:14:48,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:14:48,885 INFO L225 Difference]: With dead ends: 158 [2022-10-15 16:14:48,885 INFO L226 Difference]: Without dead ends: 158 [2022-10-15 16:14:48,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2022-10-15 16:14:48,887 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 658 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-15 16:14:48,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [658 Valid, 283 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-15 16:14:48,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-10-15 16:14:48,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 88. [2022-10-15 16:14:48,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 80 states have (on average 1.3125) internal successors, (105), 87 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:14:48,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 105 transitions. [2022-10-15 16:14:48,893 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 105 transitions. Word has length 30 [2022-10-15 16:14:48,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:14:48,894 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 105 transitions. [2022-10-15 16:14:48,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.684210526315789) internal successors, (89), 20 states have internal predecessors, (89), 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 16:14:48,895 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 105 transitions. [2022-10-15 16:14:48,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-10-15 16:14:48,896 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:14:48,896 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:14:48,937 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 16:14:49,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:14:49,112 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 16:14:49,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:14:49,113 INFO L85 PathProgramCache]: Analyzing trace with hash -246363542, now seen corresponding path program 1 times [2022-10-15 16:14:49,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:14:49,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829870737] [2022-10-15 16:14:49,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:14:49,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:14:49,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:14:49,323 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-15 16:14:49,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:14:49,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829870737] [2022-10-15 16:14:49,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829870737] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:14:49,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126529095] [2022-10-15 16:14:49,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:14:49,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:14:49,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:14:49,326 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 16:14:49,346 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 16:14:49,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:14:49,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-15 16:14:49,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:14:49,548 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:14:49,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:14:49,638 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:14:49,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126529095] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:14:49,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:14:49,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 17 [2022-10-15 16:14:49,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275210803] [2022-10-15 16:14:49,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:14:49,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-15 16:14:49,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:14:49,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-15 16:14:49,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2022-10-15 16:14:49,641 INFO L87 Difference]: Start difference. First operand 88 states and 105 transitions. Second operand has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:14:50,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:14:50,124 INFO L93 Difference]: Finished difference Result 255 states and 257 transitions. [2022-10-15 16:14:50,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-15 16:14:50,125 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-10-15 16:14:50,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:14:50,127 INFO L225 Difference]: With dead ends: 255 [2022-10-15 16:14:50,127 INFO L226 Difference]: Without dead ends: 255 [2022-10-15 16:14:50,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=256, Invalid=500, Unknown=0, NotChecked=0, Total=756 [2022-10-15 16:14:50,128 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 858 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 16:14:50,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [858 Valid, 129 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 16:14:50,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-10-15 16:14:50,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 192. [2022-10-15 16:14:50,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 184 states have (on average 1.3532608695652173) internal successors, (249), 191 states have internal predecessors, (249), 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 16:14:50,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 249 transitions. [2022-10-15 16:14:50,138 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 249 transitions. Word has length 31 [2022-10-15 16:14:50,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:14:50,138 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 249 transitions. [2022-10-15 16:14:50,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:14:50,139 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 249 transitions. [2022-10-15 16:14:50,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-10-15 16:14:50,140 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:14:50,140 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1] [2022-10-15 16:14:50,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-10-15 16:14:50,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-10-15 16:14:50,356 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 16:14:50,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:14:50,357 INFO L85 PathProgramCache]: Analyzing trace with hash -244953434, now seen corresponding path program 2 times [2022-10-15 16:14:50,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:14:50,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430202747] [2022-10-15 16:14:50,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:14:50,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:14:50,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:14:50,756 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:14:50,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:14:50,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430202747] [2022-10-15 16:14:50,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430202747] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:14:50,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463114921] [2022-10-15 16:14:50,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 16:14:50,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:14:50,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:14:50,758 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 16:14:50,759 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 16:14:50,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 16:14:50,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:14:50,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-15 16:14:50,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:14:50,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 16:14:50,877 INFO L356 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-10-15 16:14:50,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2022-10-15 16:14:50,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 94 [2022-10-15 16:14:51,102 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-10-15 16:14:51,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:14:51,608 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-10-15 16:14:51,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463114921] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:14:51,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:14:51,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 14 [2022-10-15 16:14:51,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712455479] [2022-10-15 16:14:51,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:14:51,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-10-15 16:14:51,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:14:51,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-10-15 16:14:51,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-10-15 16:14:51,611 INFO L87 Difference]: Start difference. First operand 192 states and 249 transitions. Second operand has 15 states, 14 states have (on average 4.0) internal successors, (56), 15 states have internal predecessors, (56), 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 16:14:52,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:14:52,021 INFO L93 Difference]: Finished difference Result 194 states and 235 transitions. [2022-10-15 16:14:52,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-15 16:14:52,021 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.0) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-10-15 16:14:52,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:14:52,023 INFO L225 Difference]: With dead ends: 194 [2022-10-15 16:14:52,023 INFO L226 Difference]: Without dead ends: 194 [2022-10-15 16:14:52,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2022-10-15 16:14:52,024 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 238 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 16:14:52,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 114 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 16:14:52,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-10-15 16:14:52,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 190. [2022-10-15 16:14:52,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 184 states have (on average 1.2717391304347827) internal successors, (234), 189 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:14:52,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 234 transitions. [2022-10-15 16:14:52,031 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 234 transitions. Word has length 31 [2022-10-15 16:14:52,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:14:52,032 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 234 transitions. [2022-10-15 16:14:52,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.0) internal successors, (56), 15 states have internal predecessors, (56), 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 16:14:52,032 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 234 transitions. [2022-10-15 16:14:52,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-10-15 16:14:52,034 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:14:52,035 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:14:52,067 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 16:14:52,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:14:52,251 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 16:14:52,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:14:52,252 INFO L85 PathProgramCache]: Analyzing trace with hash -945479807, now seen corresponding path program 1 times [2022-10-15 16:14:52,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:14:52,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710402104] [2022-10-15 16:14:52,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:14:52,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:14:52,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:14:52,424 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2022-10-15 16:14:52,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:14:52,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710402104] [2022-10-15 16:14:52,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710402104] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:14:52,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:14:52,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 16:14:52,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676215206] [2022-10-15 16:14:52,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:14:52,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 16:14:52,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:14:52,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 16:14:52,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 16:14:52,427 INFO L87 Difference]: Start difference. First operand 190 states and 234 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:14:52,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:14:52,441 INFO L93 Difference]: Finished difference Result 188 states and 215 transitions. [2022-10-15 16:14:52,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 16:14:52,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-10-15 16:14:52,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:14:52,444 INFO L225 Difference]: With dead ends: 188 [2022-10-15 16:14:52,444 INFO L226 Difference]: Without dead ends: 188 [2022-10-15 16:14:52,444 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 16:14:52,445 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 16:14:52,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 22 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 16:14:52,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-10-15 16:14:52,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2022-10-15 16:14:52,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 184 states have (on average 1.1684782608695652) internal successors, (215), 187 states have internal predecessors, (215), 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 16:14:52,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 215 transitions. [2022-10-15 16:14:52,451 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 215 transitions. Word has length 68 [2022-10-15 16:14:52,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:14:52,451 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 215 transitions. [2022-10-15 16:14:52,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:14:52,452 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 215 transitions. [2022-10-15 16:14:52,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-10-15 16:14:52,453 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:14:52,454 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:14:52,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-10-15 16:14:52,454 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 16:14:52,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:14:52,455 INFO L85 PathProgramCache]: Analyzing trace with hash -945479806, now seen corresponding path program 1 times [2022-10-15 16:14:52,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:14:52,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924814515] [2022-10-15 16:14:52,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:14:52,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:14:52,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:14:52,826 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:14:52,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:14:52,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924814515] [2022-10-15 16:14:52,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924814515] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:14:52,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977397124] [2022-10-15 16:14:52,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:14:52,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:14:52,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:14:52,829 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 16:14:52,856 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 16:14:52,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:14:52,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-15 16:14:52,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:14:53,298 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:14:53,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:14:53,575 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:14:53,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977397124] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:14:53,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:14:53,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2022-10-15 16:14:53,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517779436] [2022-10-15 16:14:53,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:14:53,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-10-15 16:14:53,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:14:53,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-10-15 16:14:53,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=753, Unknown=0, NotChecked=0, Total=1332 [2022-10-15 16:14:53,578 INFO L87 Difference]: Start difference. First operand 188 states and 215 transitions. Second operand has 37 states, 37 states have (on average 5.216216216216216) internal successors, (193), 36 states have internal predecessors, (193), 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 16:14:54,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:14:54,507 INFO L93 Difference]: Finished difference Result 485 states and 487 transitions. [2022-10-15 16:14:54,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-10-15 16:14:54,507 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.216216216216216) internal successors, (193), 36 states have internal predecessors, (193), 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 68 [2022-10-15 16:14:54,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:14:54,510 INFO L225 Difference]: With dead ends: 485 [2022-10-15 16:14:54,511 INFO L226 Difference]: Without dead ends: 485 [2022-10-15 16:14:54,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=876, Invalid=1380, Unknown=0, NotChecked=0, Total=2256 [2022-10-15 16:14:54,513 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1115 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1115 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-15 16:14:54,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1115 Valid, 239 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-15 16:14:54,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-10-15 16:14:54,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 404. [2022-10-15 16:14:54,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 400 states have (on average 1.1675) internal successors, (467), 403 states have internal predecessors, (467), 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 16:14:54,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 467 transitions. [2022-10-15 16:14:54,523 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 467 transitions. Word has length 68 [2022-10-15 16:14:54,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:14:54,524 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 467 transitions. [2022-10-15 16:14:54,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 5.216216216216216) internal successors, (193), 36 states have internal predecessors, (193), 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 16:14:54,524 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 467 transitions. [2022-10-15 16:14:54,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-10-15 16:14:54,526 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:14:54,526 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:14:54,555 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 16:14:54,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:14:54,743 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 16:14:54,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:14:54,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1291931386, now seen corresponding path program 2 times [2022-10-15 16:14:54,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:14:54,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531704353] [2022-10-15 16:14:54,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:14:54,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:14:54,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:14:56,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1408 backedges. 0 proven. 1408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:14:56,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:14:56,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531704353] [2022-10-15 16:14:56,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531704353] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:14:56,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972156018] [2022-10-15 16:14:56,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 16:14:56,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:14:56,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:14:56,241 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 16:14:56,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-15 16:14:56,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 16:14:56,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:14:56,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-15 16:14:56,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:14:56,373 INFO L356 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-10-15 16:14:56,374 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 2 case distinctions, treesize of input 12 treesize of output 27 [2022-10-15 16:14:56,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1408 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1408 trivial. 0 not checked. [2022-10-15 16:14:56,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 16:14:56,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972156018] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:14:56,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 16:14:56,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [25] total 27 [2022-10-15 16:14:56,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278991865] [2022-10-15 16:14:56,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:14:56,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-15 16:14:56,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:14:56,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-15 16:14:56,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=448, Unknown=0, NotChecked=0, Total=756 [2022-10-15 16:14:56,908 INFO L87 Difference]: Start difference. First operand 404 states and 467 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:14:56,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:14:56,995 INFO L93 Difference]: Finished difference Result 404 states and 466 transitions. [2022-10-15 16:14:56,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-15 16:14:56,996 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2022-10-15 16:14:56,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:14:56,999 INFO L225 Difference]: With dead ends: 404 [2022-10-15 16:14:56,999 INFO L226 Difference]: Without dead ends: 404 [2022-10-15 16:14:57,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=341, Invalid=529, Unknown=0, NotChecked=0, Total=870 [2022-10-15 16:14:57,001 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 71 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:14:57,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 22 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:14:57,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-10-15 16:14:57,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 404. [2022-10-15 16:14:57,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 400 states have (on average 1.165) internal successors, (466), 403 states have internal predecessors, (466), 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 16:14:57,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 466 transitions. [2022-10-15 16:14:57,017 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 466 transitions. Word has length 140 [2022-10-15 16:14:57,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:14:57,018 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 466 transitions. [2022-10-15 16:14:57,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:14:57,018 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 466 transitions. [2022-10-15 16:14:57,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-10-15 16:14:57,020 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:14:57,020 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:14:57,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-15 16:14:57,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-10-15 16:14:57,236 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 16:14:57,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:14:57,237 INFO L85 PathProgramCache]: Analyzing trace with hash -2142249120, now seen corresponding path program 1 times [2022-10-15 16:14:57,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:14:57,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618864091] [2022-10-15 16:14:57,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:14:57,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:14:57,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:14:58,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 0 proven. 1408 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-15 16:14:58,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:14:58,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618864091] [2022-10-15 16:14:58,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618864091] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:14:58,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639352976] [2022-10-15 16:14:58,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:14:58,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:14:58,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:14:58,496 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:14:58,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-15 16:14:58,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:14:58,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 25 conjunts are in the unsatisfiable core [2022-10-15 16:14:58,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:14:59,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 0 proven. 1408 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-15 16:14:59,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:15:00,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 0 proven. 1408 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-15 16:15:00,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639352976] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:15:00,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:15:00,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 72 [2022-10-15 16:15:00,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74237871] [2022-10-15 16:15:00,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:15:00,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-10-15 16:15:00,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:15:00,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-10-15 16:15:00,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2307, Invalid=2949, Unknown=0, NotChecked=0, Total=5256 [2022-10-15 16:15:00,708 INFO L87 Difference]: Start difference. First operand 404 states and 466 transitions. Second operand has 73 states, 73 states have (on average 5.6438356164383565) internal successors, (412), 72 states have internal predecessors, (412), 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 16:15:03,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:15:03,640 INFO L93 Difference]: Finished difference Result 1012 states and 1014 transitions. [2022-10-15 16:15:03,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-10-15 16:15:03,641 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 5.6438356164383565) internal successors, (412), 72 states have internal predecessors, (412), 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 146 [2022-10-15 16:15:03,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:15:03,646 INFO L225 Difference]: With dead ends: 1012 [2022-10-15 16:15:03,647 INFO L226 Difference]: Without dead ends: 1012 [2022-10-15 16:15:03,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3217 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3480, Invalid=5640, Unknown=0, NotChecked=0, Total=9120 [2022-10-15 16:15:03,651 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 3623 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3623 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 1408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:15:03,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3623 Valid, 473 Invalid, 1408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [577 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-10-15 16:15:03,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2022-10-15 16:15:03,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 836. [2022-10-15 16:15:03,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 832 states have (on average 1.1658653846153846) internal successors, (970), 835 states have internal predecessors, (970), 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 16:15:03,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 970 transitions. [2022-10-15 16:15:03,671 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 970 transitions. Word has length 146 [2022-10-15 16:15:03,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:15:03,672 INFO L495 AbstractCegarLoop]: Abstraction has 836 states and 970 transitions. [2022-10-15 16:15:03,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 5.6438356164383565) internal successors, (412), 72 states have internal predecessors, (412), 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 16:15:03,672 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 970 transitions. [2022-10-15 16:15:03,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-10-15 16:15:03,676 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:15:03,676 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:15:03,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-10-15 16:15:03,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-10-15 16:15:03,893 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 16:15:03,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:15:03,894 INFO L85 PathProgramCache]: Analyzing trace with hash -61922736, now seen corresponding path program 2 times [2022-10-15 16:15:03,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:15:03,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317502245] [2022-10-15 16:15:03,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:15:03,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:15:04,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:15:08,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6260 backedges. 0 proven. 6256 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-15 16:15:08,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:15:08,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317502245] [2022-10-15 16:15:08,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317502245] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:15:08,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139208963] [2022-10-15 16:15:08,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 16:15:08,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:15:08,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:15:08,226 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:15:08,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-15 16:15:08,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 16:15:08,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:15:08,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-15 16:15:08,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:15:08,419 INFO L356 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-10-15 16:15:08,420 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 2 case distinctions, treesize of input 12 treesize of output 27 [2022-10-15 16:15:10,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6260 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6257 trivial. 0 not checked. [2022-10-15 16:15:10,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:15:14,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6260 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6257 trivial. 0 not checked. [2022-10-15 16:15:14,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139208963] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:15:14,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:15:14,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 4, 4] total 56 [2022-10-15 16:15:14,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822850844] [2022-10-15 16:15:14,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:15:14,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-10-15 16:15:14,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:15:14,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-10-15 16:15:14,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1196, Invalid=1884, Unknown=0, NotChecked=0, Total=3080 [2022-10-15 16:15:14,507 INFO L87 Difference]: Start difference. First operand 836 states and 970 transitions. Second operand has 56 states, 56 states have (on average 5.821428571428571) internal successors, (326), 56 states have internal predecessors, (326), 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 16:15:19,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:15:19,733 INFO L93 Difference]: Finished difference Result 973 states and 978 transitions. [2022-10-15 16:15:19,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-10-15 16:15:19,734 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 5.821428571428571) internal successors, (326), 56 states have internal predecessors, (326), 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 290 [2022-10-15 16:15:19,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:15:19,740 INFO L225 Difference]: With dead ends: 973 [2022-10-15 16:15:19,740 INFO L226 Difference]: Without dead ends: 973 [2022-10-15 16:15:19,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 678 GetRequests, 573 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1602 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=4050, Invalid=7292, Unknown=0, NotChecked=0, Total=11342 [2022-10-15 16:15:19,745 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 5371 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 983 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5371 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 1632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 983 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-10-15 16:15:19,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5371 Valid, 402 Invalid, 1632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [983 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-10-15 16:15:19,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2022-10-15 16:15:19,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 860. [2022-10-15 16:15:19,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 857 states have (on average 1.060676779463244) internal successors, (909), 859 states have internal predecessors, (909), 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 16:15:19,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 909 transitions. [2022-10-15 16:15:19,818 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 909 transitions. Word has length 290 [2022-10-15 16:15:19,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:15:19,819 INFO L495 AbstractCegarLoop]: Abstraction has 860 states and 909 transitions. [2022-10-15 16:15:19,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 5.821428571428571) internal successors, (326), 56 states have internal predecessors, (326), 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 16:15:19,819 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 909 transitions. [2022-10-15 16:15:19,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2022-10-15 16:15:19,834 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:15:19,834 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:15:19,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-15 16:15:20,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-10-15 16:15:20,048 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 16:15:20,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:15:20,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1931306904, now seen corresponding path program 1 times [2022-10-15 16:15:20,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:15:20,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317905550] [2022-10-15 16:15:20,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:15:20,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:15:20,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:15:25,636 INFO L134 CoverageAnalysis]: Checked inductivity of 13066 backedges. 0 proven. 6533 refuted. 0 times theorem prover too weak. 6533 trivial. 0 not checked. [2022-10-15 16:15:25,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:15:25,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317905550] [2022-10-15 16:15:25,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317905550] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:15:25,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928098932] [2022-10-15 16:15:25,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:15:25,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:15:25,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:15:25,640 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:15:25,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-10-15 16:15:26,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:15:26,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 2579 conjuncts, 50 conjunts are in the unsatisfiable core [2022-10-15 16:15:26,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:15:28,626 INFO L134 CoverageAnalysis]: Checked inductivity of 13066 backedges. 0 proven. 6533 refuted. 0 times theorem prover too weak. 6533 trivial. 0 not checked. [2022-10-15 16:15:28,627 INFO L328 TraceCheckSpWp]: Computing backward predicates...