/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/termination-recursive-malloc/rec_strcopy_malloc2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 18:00:33,912 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 18:00:33,916 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 18:00:33,977 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 18:00:33,978 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 18:00:33,983 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 18:00:33,987 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 18:00:34,000 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 18:00:34,006 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 18:00:34,010 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 18:00:34,012 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 18:00:34,015 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 18:00:34,016 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 18:00:34,022 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 18:00:34,023 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 18:00:34,026 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 18:00:34,028 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 18:00:34,030 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 18:00:34,034 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 18:00:34,042 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 18:00:34,046 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 18:00:34,048 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 18:00:34,050 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 18:00:34,053 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 18:00:34,064 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-15 18:00:34,095 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 18:00:34,096 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 18:00:34,096 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 18:00:34,098 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-15 18:00:34,146 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 18:00:34,147 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 18:00:34,148 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 18:00:34,148 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 18:00:34,150 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 18:00:34,150 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 18:00:34,153 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 18:00:34,153 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 18:00:34,153 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 18:00:34,154 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 18:00:34,155 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 18:00:34,155 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 18:00:34,155 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 18:00:34,155 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 18:00:34,156 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 18:00:34,156 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 18:00:34,156 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 18:00:34,156 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 18:00:34,156 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 18:00:34,157 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 18:00:34,157 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 18:00:34,157 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 18:00:34,157 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 18:00:34,157 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 18:00:34,158 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 18:00:34,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 18:00:34,158 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 18:00:34,159 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 18:00:34,159 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 18:00:34,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 18:00:34,159 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 18:00:34,572 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 18:00:34,601 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 18:00:34,604 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 18:00:34,607 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 18:00:34,608 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 18:00:34,609 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-recursive-malloc/rec_strcopy_malloc2.i [2022-10-15 18:00:34,693 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c587164a/be811bb7662a4b67ad7a06ccabdee226/FLAGcc72f20e2 [2022-10-15 18:00:35,301 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 18:00:35,302 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-recursive-malloc/rec_strcopy_malloc2.i [2022-10-15 18:00:35,309 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c587164a/be811bb7662a4b67ad7a06ccabdee226/FLAGcc72f20e2 [2022-10-15 18:00:35,655 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c587164a/be811bb7662a4b67ad7a06ccabdee226 [2022-10-15 18:00:35,659 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 18:00:35,666 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 18:00:35,668 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 18:00:35,668 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 18:00:35,672 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 18:00:35,673 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 06:00:35" (1/1) ... [2022-10-15 18:00:35,675 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79f8dde9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:00:35, skipping insertion in model container [2022-10-15 18:00:35,675 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 06:00:35" (1/1) ... [2022-10-15 18:00:35,684 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 18:00:35,705 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 18:00:35,874 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 18:00:35,885 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 18:00:35,905 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 18:00:35,922 INFO L208 MainTranslator]: Completed translation [2022-10-15 18:00:35,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:00:35 WrapperNode [2022-10-15 18:00:35,923 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 18:00:35,924 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 18:00:35,924 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 18:00:35,924 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 18:00:35,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:00:35" (1/1) ... [2022-10-15 18:00:35,944 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:00:35" (1/1) ... [2022-10-15 18:00:35,978 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 42 [2022-10-15 18:00:35,979 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 18:00:35,980 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 18:00:35,981 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 18:00:35,981 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 18:00:35,992 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:00:35" (1/1) ... [2022-10-15 18:00:35,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:00:35" (1/1) ... [2022-10-15 18:00:36,011 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:00:35" (1/1) ... [2022-10-15 18:00:36,012 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:00:35" (1/1) ... [2022-10-15 18:00:36,022 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:00:35" (1/1) ... [2022-10-15 18:00:36,032 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:00:35" (1/1) ... [2022-10-15 18:00:36,034 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:00:35" (1/1) ... [2022-10-15 18:00:36,037 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:00:35" (1/1) ... [2022-10-15 18:00:36,042 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 18:00:36,045 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 18:00:36,045 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 18:00:36,046 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 18:00:36,048 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:00:35" (1/1) ... [2022-10-15 18:00:36,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 18:00:36,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:00:36,084 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-15 18:00:36,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-15 18:00:36,143 INFO L130 BoogieDeclarations]: Found specification of procedure rec_strcopy_helper [2022-10-15 18:00:36,143 INFO L138 BoogieDeclarations]: Found implementation of procedure rec_strcopy_helper [2022-10-15 18:00:36,143 INFO L130 BoogieDeclarations]: Found specification of procedure rec_cstrlen [2022-10-15 18:00:36,144 INFO L138 BoogieDeclarations]: Found implementation of procedure rec_cstrlen [2022-10-15 18:00:36,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 18:00:36,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-15 18:00:36,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 18:00:36,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 18:00:36,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 18:00:36,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 18:00:36,233 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 18:00:36,236 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 18:00:36,598 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 18:00:36,614 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 18:00:36,615 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-10-15 18:00:36,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 06:00:36 BoogieIcfgContainer [2022-10-15 18:00:36,617 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 18:00:36,620 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 18:00:36,620 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 18:00:36,624 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 18:00:36,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 06:00:35" (1/3) ... [2022-10-15 18:00:36,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d605990 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 06:00:36, skipping insertion in model container [2022-10-15 18:00:36,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:00:35" (2/3) ... [2022-10-15 18:00:36,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d605990 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 06:00:36, skipping insertion in model container [2022-10-15 18:00:36,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 06:00:36" (3/3) ... [2022-10-15 18:00:36,628 INFO L112 eAbstractionObserver]: Analyzing ICFG rec_strcopy_malloc2.i [2022-10-15 18:00:36,651 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 18:00:36,652 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2022-10-15 18:00:36,713 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 18:00:36,724 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;@3259295b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 18:00:36,725 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2022-10-15 18:00:36,731 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 48 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-15 18:00:36,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-10-15 18:00:36,739 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:00:36,740 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-10-15 18:00:36,741 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-15 18:00:36,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:00:36,749 INFO L85 PathProgramCache]: Analyzing trace with hash 46825623, now seen corresponding path program 1 times [2022-10-15 18:00:36,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:00:36,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018448801] [2022-10-15 18:00:36,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:00:36,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:00:36,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:37,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:00:37,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:00:37,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018448801] [2022-10-15 18:00:37,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018448801] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:00:37,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:00:37,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:00:37,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771013765] [2022-10-15 18:00:37,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:00:37,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:00:37,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:00:37,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:00:37,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:00:37,137 INFO L87 Difference]: Start difference. First operand has 54 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 48 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:00:37,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:00:37,217 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2022-10-15 18:00:37,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:00:37,221 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2022-10-15 18:00:37,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:00:37,234 INFO L225 Difference]: With dead ends: 53 [2022-10-15 18:00:37,234 INFO L226 Difference]: Without dead ends: 51 [2022-10-15 18:00:37,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:00:37,247 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 11 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:00:37,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 76 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:00:37,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-10-15 18:00:37,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-10-15 18:00:37,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 45 states have internal predecessors, (47), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-15 18:00:37,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2022-10-15 18:00:37,315 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 5 [2022-10-15 18:00:37,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:00:37,316 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2022-10-15 18:00:37,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:00:37,322 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2022-10-15 18:00:37,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-10-15 18:00:37,323 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:00:37,323 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-10-15 18:00:37,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 18:00:37,325 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-15 18:00:37,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:00:37,326 INFO L85 PathProgramCache]: Analyzing trace with hash 46825624, now seen corresponding path program 1 times [2022-10-15 18:00:37,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:00:37,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846654146] [2022-10-15 18:00:37,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:00:37,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:00:37,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:37,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:00:37,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:00:37,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846654146] [2022-10-15 18:00:37,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846654146] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:00:37,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:00:37,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-15 18:00:37,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230289751] [2022-10-15 18:00:37,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:00:37,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 18:00:37,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:00:37,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 18:00:37,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-15 18:00:37,497 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:00:37,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:00:37,574 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2022-10-15 18:00:37,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 18:00:37,575 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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 5 [2022-10-15 18:00:37,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:00:37,576 INFO L225 Difference]: With dead ends: 50 [2022-10-15 18:00:37,577 INFO L226 Difference]: Without dead ends: 50 [2022-10-15 18:00:37,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 18:00:37,582 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 22 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:00:37,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 118 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:00:37,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-10-15 18:00:37,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-10-15 18:00:37,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 44 states have internal predecessors, (46), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-15 18:00:37,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-10-15 18:00:37,606 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 5 [2022-10-15 18:00:37,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:00:37,606 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-10-15 18:00:37,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:00:37,607 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-10-15 18:00:37,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-15 18:00:37,610 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:00:37,610 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:00:37,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 18:00:37,611 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting rec_cstrlenErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-15 18:00:37,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:00:37,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1718624304, now seen corresponding path program 1 times [2022-10-15 18:00:37,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:00:37,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660833331] [2022-10-15 18:00:37,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:00:37,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:00:37,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:37,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:00:37,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:00:37,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660833331] [2022-10-15 18:00:37,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660833331] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:00:37,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:00:37,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-15 18:00:37,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643412747] [2022-10-15 18:00:37,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:00:37,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-15 18:00:37,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:00:37,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-15 18:00:37,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-15 18:00:37,846 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 7 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:00:38,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:00:38,105 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2022-10-15 18:00:38,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-15 18:00:38,106 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-10-15 18:00:38,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:00:38,108 INFO L225 Difference]: With dead ends: 49 [2022-10-15 18:00:38,108 INFO L226 Difference]: Without dead ends: 49 [2022-10-15 18:00:38,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-10-15 18:00:38,111 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 37 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 18:00:38,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 146 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 18:00:38,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-10-15 18:00:38,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-10-15 18:00:38,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 43 states have internal predecessors, (45), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-15 18:00:38,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2022-10-15 18:00:38,121 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 10 [2022-10-15 18:00:38,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:00:38,124 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2022-10-15 18:00:38,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:00:38,125 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2022-10-15 18:00:38,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-15 18:00:38,126 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:00:38,126 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:00:38,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-15 18:00:38,126 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting rec_cstrlenErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-15 18:00:38,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:00:38,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1718624303, now seen corresponding path program 1 times [2022-10-15 18:00:38,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:00:38,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694340385] [2022-10-15 18:00:38,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:00:38,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:00:38,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:38,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:00:38,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:00:38,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694340385] [2022-10-15 18:00:38,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694340385] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:00:38,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:00:38,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-15 18:00:38,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210573313] [2022-10-15 18:00:38,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:00:38,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-15 18:00:38,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:00:38,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-15 18:00:38,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-10-15 18:00:38,485 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 8 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:00:38,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:00:38,715 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2022-10-15 18:00:38,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-15 18:00:38,716 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 8 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-10-15 18:00:38,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:00:38,720 INFO L225 Difference]: With dead ends: 56 [2022-10-15 18:00:38,723 INFO L226 Difference]: Without dead ends: 56 [2022-10-15 18:00:38,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-10-15 18:00:38,737 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 36 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:00:38,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 250 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:00:38,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-10-15 18:00:38,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-10-15 18:00:38,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 34 states have (on average 1.5) internal successors, (51), 48 states have internal predecessors, (51), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-15 18:00:38,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2022-10-15 18:00:38,769 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 10 [2022-10-15 18:00:38,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:00:38,770 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2022-10-15 18:00:38,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 8 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:00:38,771 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2022-10-15 18:00:38,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-10-15 18:00:38,772 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:00:38,772 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:00:38,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-15 18:00:38,773 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting rec_cstrlenErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-15 18:00:38,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:00:38,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1945398020, now seen corresponding path program 1 times [2022-10-15 18:00:38,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:00:38,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330662086] [2022-10-15 18:00:38,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:00:38,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:00:38,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:39,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:00:39,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:00:39,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330662086] [2022-10-15 18:00:39,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330662086] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:00:39,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:00:39,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-10-15 18:00:39,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089162883] [2022-10-15 18:00:39,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:00:39,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-15 18:00:39,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:00:39,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-15 18:00:39,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-10-15 18:00:39,118 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:00:39,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:00:39,306 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2022-10-15 18:00:39,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-15 18:00:39,307 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-10-15 18:00:39,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:00:39,309 INFO L225 Difference]: With dead ends: 84 [2022-10-15 18:00:39,309 INFO L226 Difference]: Without dead ends: 84 [2022-10-15 18:00:39,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-10-15 18:00:39,311 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 50 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:00:39,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 387 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:00:39,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-10-15 18:00:39,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2022-10-15 18:00:39,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 57 states have internal predecessors, (59), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-15 18:00:39,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2022-10-15 18:00:39,328 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 14 [2022-10-15 18:00:39,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:00:39,328 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2022-10-15 18:00:39,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:00:39,329 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2022-10-15 18:00:39,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-10-15 18:00:39,330 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:00:39,330 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:00:39,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-15 18:00:39,330 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting rec_cstrlenErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-15 18:00:39,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:00:39,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1687232582, now seen corresponding path program 1 times [2022-10-15 18:00:39,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:00:39,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121066945] [2022-10-15 18:00:39,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:00:39,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:00:39,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:39,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:00:39,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:00:39,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121066945] [2022-10-15 18:00:39,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121066945] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:00:39,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446178591] [2022-10-15 18:00:39,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:00:39,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:00:39,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:00:39,851 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:00:39,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-15 18:00:39,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:39,922 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2022-10-15 18:00:39,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:00:40,034 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 18:00:40,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-15 18:00:40,611 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-15 18:00:40,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-10-15 18:00:40,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:00:40,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:00:41,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 11 [2022-10-15 18:00:41,377 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 22 treesize of output 20 [2022-10-15 18:00:41,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:00:41,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446178591] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:00:41,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:00:41,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 31 [2022-10-15 18:00:41,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514782299] [2022-10-15 18:00:41,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:00:41,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-10-15 18:00:41,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:00:41,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-10-15 18:00:41,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2022-10-15 18:00:41,533 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand has 32 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 5 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:00:42,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:00:42,029 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2022-10-15 18:00:42,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-15 18:00:42,030 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 5 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-10-15 18:00:42,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:00:42,032 INFO L225 Difference]: With dead ends: 75 [2022-10-15 18:00:42,033 INFO L226 Difference]: Without dead ends: 75 [2022-10-15 18:00:42,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=137, Invalid=1345, Unknown=0, NotChecked=0, Total=1482 [2022-10-15 18:00:42,035 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 24 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 18:00:42,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 992 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 269 Invalid, 0 Unknown, 171 Unchecked, 0.2s Time] [2022-10-15 18:00:42,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-10-15 18:00:42,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2022-10-15 18:00:42,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 62 states have internal predecessors, (65), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-10-15 18:00:42,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2022-10-15 18:00:42,043 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 14 [2022-10-15 18:00:42,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:00:42,044 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2022-10-15 18:00:42,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 5 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:00:42,044 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2022-10-15 18:00:42,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-15 18:00:42,045 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:00:42,046 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:00:42,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-10-15 18:00:42,260 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 18:00:42,261 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-15 18:00:42,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:00:42,263 INFO L85 PathProgramCache]: Analyzing trace with hash -139345830, now seen corresponding path program 1 times [2022-10-15 18:00:42,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:00:42,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328046999] [2022-10-15 18:00:42,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:00:42,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:00:42,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:42,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-15 18:00:42,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:42,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:00:42,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:00:42,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328046999] [2022-10-15 18:00:42,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328046999] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:00:42,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:00:42,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-15 18:00:42,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514893871] [2022-10-15 18:00:42,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:00:42,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-15 18:00:42,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:00:42,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-15 18:00:42,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-15 18:00:42,389 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-15 18:00:42,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:00:42,490 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2022-10-15 18:00:42,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-15 18:00:42,491 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-10-15 18:00:42,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:00:42,492 INFO L225 Difference]: With dead ends: 71 [2022-10-15 18:00:42,492 INFO L226 Difference]: Without dead ends: 71 [2022-10-15 18:00:42,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-10-15 18:00:42,493 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 47 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:00:42,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 133 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:00:42,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-10-15 18:00:42,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-10-15 18:00:42,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 60 states have internal predecessors, (63), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-10-15 18:00:42,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2022-10-15 18:00:42,501 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 17 [2022-10-15 18:00:42,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:00:42,501 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2022-10-15 18:00:42,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-15 18:00:42,502 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2022-10-15 18:00:42,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-15 18:00:42,503 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:00:42,503 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:00:42,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-15 18:00:42,503 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-15 18:00:42,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:00:42,504 INFO L85 PathProgramCache]: Analyzing trace with hash -139345829, now seen corresponding path program 1 times [2022-10-15 18:00:42,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:00:42,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688245272] [2022-10-15 18:00:42,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:00:42,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:00:42,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:42,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-15 18:00:42,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:42,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:00:42,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:00:42,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688245272] [2022-10-15 18:00:42,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688245272] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:00:42,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:00:42,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-10-15 18:00:42,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447608465] [2022-10-15 18:00:42,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:00:42,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-15 18:00:42,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:00:42,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-15 18:00:42,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-10-15 18:00:42,761 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-15 18:00:42,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:00:42,980 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2022-10-15 18:00:42,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-15 18:00:42,980 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-10-15 18:00:42,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:00:42,981 INFO L225 Difference]: With dead ends: 82 [2022-10-15 18:00:42,981 INFO L226 Difference]: Without dead ends: 82 [2022-10-15 18:00:42,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-10-15 18:00:42,982 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 85 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:00:42,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 211 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:00:42,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-10-15 18:00:42,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2022-10-15 18:00:42,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 54 states have (on average 1.3518518518518519) internal successors, (73), 68 states have internal predecessors, (73), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-10-15 18:00:42,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2022-10-15 18:00:42,990 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 17 [2022-10-15 18:00:42,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:00:42,991 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2022-10-15 18:00:42,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-15 18:00:42,991 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2022-10-15 18:00:42,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-15 18:00:42,992 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:00:42,992 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:00:42,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-15 18:00:42,993 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting rec_cstrlenErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-15 18:00:42,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:00:42,993 INFO L85 PathProgramCache]: Analyzing trace with hash -2061076379, now seen corresponding path program 2 times [2022-10-15 18:00:42,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:00:42,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815089952] [2022-10-15 18:00:42,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:00:42,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:00:43,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:43,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:00:43,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:00:43,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815089952] [2022-10-15 18:00:43,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815089952] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:00:43,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624043058] [2022-10-15 18:00:43,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:00:43,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:00:43,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:00:43,581 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:00:43,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-15 18:00:43,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 18:00:43,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:00:43,651 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 50 conjunts are in the unsatisfiable core [2022-10-15 18:00:43,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:00:43,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-15 18:00:44,688 INFO L356 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2022-10-15 18:00:44,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 29 [2022-10-15 18:00:44,783 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:00:44,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:00:45,782 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 29 treesize of output 25 [2022-10-15 18:00:45,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2022-10-15 18:00:45,801 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 35 treesize of output 27 [2022-10-15 18:00:45,844 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:00:45,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624043058] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:00:45,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:00:45,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 16] total 38 [2022-10-15 18:00:45,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414777324] [2022-10-15 18:00:45,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:00:45,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-10-15 18:00:45,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:00:45,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-10-15 18:00:45,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2022-10-15 18:00:45,848 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 39 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 8 states have call successors, (8), 8 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:00:46,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:00:46,993 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2022-10-15 18:00:46,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-10-15 18:00:46,994 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 8 states have call successors, (8), 8 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-10-15 18:00:46,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:00:46,996 INFO L225 Difference]: With dead ends: 79 [2022-10-15 18:00:46,996 INFO L226 Difference]: Without dead ends: 79 [2022-10-15 18:00:47,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=250, Invalid=2612, Unknown=0, NotChecked=0, Total=2862 [2022-10-15 18:00:47,003 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 4 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1050 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:00:47,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1050 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 163 Invalid, 0 Unknown, 201 Unchecked, 0.1s Time] [2022-10-15 18:00:47,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-10-15 18:00:47,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-10-15 18:00:47,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 54 states have (on average 1.3333333333333333) internal successors, (72), 67 states have internal predecessors, (72), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-10-15 18:00:47,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2022-10-15 18:00:47,025 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 18 [2022-10-15 18:00:47,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:00:47,025 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2022-10-15 18:00:47,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 8 states have call successors, (8), 8 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:00:47,029 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2022-10-15 18:00:47,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-15 18:00:47,030 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:00:47,030 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:00:47,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-15 18:00:47,245 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,SelfDestructingSolverStorable8 [2022-10-15 18:00:47,246 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-15 18:00:47,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:00:47,247 INFO L85 PathProgramCache]: Analyzing trace with hash -24753460, now seen corresponding path program 1 times [2022-10-15 18:00:47,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:00:47,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124294095] [2022-10-15 18:00:47,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:00:47,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:00:47,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:47,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-15 18:00:47,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:47,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:00:47,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:00:47,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124294095] [2022-10-15 18:00:47,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124294095] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:00:47,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:00:47,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-15 18:00:47,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050072261] [2022-10-15 18:00:47,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:00:47,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-15 18:00:47,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:00:47,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-15 18:00:47,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-15 18:00:47,310 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-15 18:00:47,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:00:47,362 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2022-10-15 18:00:47,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-15 18:00:47,363 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-10-15 18:00:47,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:00:47,364 INFO L225 Difference]: With dead ends: 78 [2022-10-15 18:00:47,364 INFO L226 Difference]: Without dead ends: 78 [2022-10-15 18:00:47,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-15 18:00:47,365 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 27 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:00:47,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 105 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:00:47,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-10-15 18:00:47,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-10-15 18:00:47,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 66 states have internal predecessors, (70), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-10-15 18:00:47,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2022-10-15 18:00:47,371 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 18 [2022-10-15 18:00:47,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:00:47,371 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2022-10-15 18:00:47,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-15 18:00:47,375 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2022-10-15 18:00:47,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-15 18:00:47,376 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:00:47,376 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:00:47,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-10-15 18:00:47,376 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting rec_strcopy_helperErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-15 18:00:47,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:00:47,378 INFO L85 PathProgramCache]: Analyzing trace with hash -24753459, now seen corresponding path program 1 times [2022-10-15 18:00:47,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:00:47,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810611753] [2022-10-15 18:00:47,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:00:47,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:00:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:47,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-15 18:00:47,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:47,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:00:47,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:00:47,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810611753] [2022-10-15 18:00:47,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810611753] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:00:47,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:00:47,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-15 18:00:47,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912503965] [2022-10-15 18:00:47,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:00:47,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-15 18:00:47,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:00:47,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-15 18:00:47,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-15 18:00:47,567 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand has 7 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-15 18:00:47,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:00:47,631 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2022-10-15 18:00:47,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-15 18:00:47,632 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-10-15 18:00:47,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:00:47,633 INFO L225 Difference]: With dead ends: 111 [2022-10-15 18:00:47,633 INFO L226 Difference]: Without dead ends: 111 [2022-10-15 18:00:47,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-10-15 18:00:47,634 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 29 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:00:47,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 227 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:00:47,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-10-15 18:00:47,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 91. [2022-10-15 18:00:47,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 77 states have internal predecessors, (80), 10 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2022-10-15 18:00:47,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2022-10-15 18:00:47,641 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 18 [2022-10-15 18:00:47,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:00:47,642 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2022-10-15 18:00:47,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-15 18:00:47,642 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2022-10-15 18:00:47,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-10-15 18:00:47,643 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:00:47,643 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:00:47,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-10-15 18:00:47,644 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-15 18:00:47,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:00:47,644 INFO L85 PathProgramCache]: Analyzing trace with hash 237065990, now seen corresponding path program 1 times [2022-10-15 18:00:47,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:00:47,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089179881] [2022-10-15 18:00:47,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:00:47,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:00:47,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:47,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-15 18:00:47,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:47,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:00:47,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:00:47,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089179881] [2022-10-15 18:00:47,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089179881] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:00:47,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:00:47,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-10-15 18:00:47,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369416306] [2022-10-15 18:00:47,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:00:47,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-10-15 18:00:47,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:00:47,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-10-15 18:00:47,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-10-15 18:00:47,928 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand has 13 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-15 18:00:48,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:00:48,174 INFO L93 Difference]: Finished difference Result 94 states and 103 transitions. [2022-10-15 18:00:48,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-15 18:00:48,177 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-10-15 18:00:48,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:00:48,180 INFO L225 Difference]: With dead ends: 94 [2022-10-15 18:00:48,181 INFO L226 Difference]: Without dead ends: 94 [2022-10-15 18:00:48,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-10-15 18:00:48,182 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 32 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:00:48,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 304 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:00:48,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-10-15 18:00:48,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2022-10-15 18:00:48,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 63 states have (on average 1.253968253968254) internal successors, (79), 76 states have internal predecessors, (79), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-10-15 18:00:48,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 98 transitions. [2022-10-15 18:00:48,190 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 98 transitions. Word has length 24 [2022-10-15 18:00:48,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:00:48,190 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 98 transitions. [2022-10-15 18:00:48,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-15 18:00:48,190 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 98 transitions. [2022-10-15 18:00:48,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-15 18:00:48,195 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:00:48,195 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:00:48,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-10-15 18:00:48,196 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting rec_strcopy_helperErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-15 18:00:48,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:00:48,196 INFO L85 PathProgramCache]: Analyzing trace with hash -105976886, now seen corresponding path program 1 times [2022-10-15 18:00:48,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:00:48,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685405220] [2022-10-15 18:00:48,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:00:48,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:00:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:48,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-15 18:00:48,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:48,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 18:00:48,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:48,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-15 18:00:48,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:00:48,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685405220] [2022-10-15 18:00:48,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685405220] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:00:48,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238353273] [2022-10-15 18:00:48,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:00:48,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:00:48,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:00:48,429 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:00:48,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-15 18:00:48,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:48,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 18 conjunts are in the unsatisfiable core [2022-10-15 18:00:48,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:00:48,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 18:00:48,562 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-15 18:00:48,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:00:48,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238353273] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:00:48,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:00:48,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 10 [2022-10-15 18:00:48,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185518389] [2022-10-15 18:00:48,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:00:48,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-15 18:00:48,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:00:48,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-15 18:00:48,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-10-15 18:00:48,565 INFO L87 Difference]: Start difference. First operand 90 states and 98 transitions. Second operand has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-15 18:00:48,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:00:48,653 INFO L93 Difference]: Finished difference Result 110 states and 117 transitions. [2022-10-15 18:00:48,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-15 18:00:48,654 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-10-15 18:00:48,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:00:48,655 INFO L225 Difference]: With dead ends: 110 [2022-10-15 18:00:48,655 INFO L226 Difference]: Without dead ends: 110 [2022-10-15 18:00:48,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-10-15 18:00:48,656 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 29 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:00:48,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 407 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:00:48,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-10-15 18:00:48,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 90. [2022-10-15 18:00:48,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 76 states have internal predecessors, (78), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-10-15 18:00:48,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2022-10-15 18:00:48,663 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 25 [2022-10-15 18:00:48,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:00:48,663 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2022-10-15 18:00:48,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-15 18:00:48,663 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2022-10-15 18:00:48,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-10-15 18:00:48,664 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:00:48,664 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:00:48,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-15 18:00:48,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:00:48,879 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-15 18:00:48,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:00:48,880 INFO L85 PathProgramCache]: Analyzing trace with hash 229070764, now seen corresponding path program 1 times [2022-10-15 18:00:48,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:00:48,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263076661] [2022-10-15 18:00:48,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:00:48,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:00:48,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:48,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-15 18:00:48,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:48,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-10-15 18:00:48,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:48,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:00:48,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:00:48,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263076661] [2022-10-15 18:00:48,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263076661] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:00:48,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:00:48,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-15 18:00:48,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630609093] [2022-10-15 18:00:48,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:00:48,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-15 18:00:48,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:00:48,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-15 18:00:48,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-15 18:00:48,950 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-15 18:00:48,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:00:48,999 INFO L93 Difference]: Finished difference Result 89 states and 96 transitions. [2022-10-15 18:00:49,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 18:00:49,000 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-10-15 18:00:49,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:00:49,001 INFO L225 Difference]: With dead ends: 89 [2022-10-15 18:00:49,001 INFO L226 Difference]: Without dead ends: 89 [2022-10-15 18:00:49,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-10-15 18:00:49,002 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 55 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:00:49,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 117 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:00:49,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-10-15 18:00:49,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-10-15 18:00:49,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 75 states have internal predecessors, (77), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-10-15 18:00:49,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 96 transitions. [2022-10-15 18:00:49,008 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 96 transitions. Word has length 26 [2022-10-15 18:00:49,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:00:49,009 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 96 transitions. [2022-10-15 18:00:49,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-15 18:00:49,009 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 96 transitions. [2022-10-15 18:00:49,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-10-15 18:00:49,010 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:00:49,010 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:00:49,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-10-15 18:00:49,010 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-15 18:00:49,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:00:49,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1488740834, now seen corresponding path program 1 times [2022-10-15 18:00:49,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:00:49,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665685320] [2022-10-15 18:00:49,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:00:49,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:00:49,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:49,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-15 18:00:49,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:49,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-10-15 18:00:49,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:49,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:00:49,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:00:49,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665685320] [2022-10-15 18:00:49,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665685320] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:00:49,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:00:49,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-15 18:00:49,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582879078] [2022-10-15 18:00:49,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:00:49,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-15 18:00:49,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:00:49,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-15 18:00:49,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-15 18:00:49,091 INFO L87 Difference]: Start difference. First operand 89 states and 96 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-15 18:00:49,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:00:49,160 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2022-10-15 18:00:49,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 18:00:49,161 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2022-10-15 18:00:49,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:00:49,163 INFO L225 Difference]: With dead ends: 88 [2022-10-15 18:00:49,163 INFO L226 Difference]: Without dead ends: 88 [2022-10-15 18:00:49,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-10-15 18:00:49,165 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 51 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:00:49,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 95 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:00:49,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-10-15 18:00:49,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-10-15 18:00:49,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 74 states have internal predecessors, (76), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-10-15 18:00:49,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2022-10-15 18:00:49,172 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 27 [2022-10-15 18:00:49,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:00:49,172 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2022-10-15 18:00:49,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-15 18:00:49,172 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2022-10-15 18:00:49,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-10-15 18:00:49,177 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:00:49,177 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:00:49,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-10-15 18:00:49,178 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-15 18:00:49,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:00:49,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1093674478, now seen corresponding path program 1 times [2022-10-15 18:00:49,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:00:49,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066490829] [2022-10-15 18:00:49,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:00:49,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:00:49,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:49,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-15 18:00:49,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:49,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-10-15 18:00:49,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:49,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:00:49,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:00:49,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066490829] [2022-10-15 18:00:49,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066490829] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:00:49,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:00:49,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-15 18:00:49,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640826295] [2022-10-15 18:00:49,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:00:49,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-15 18:00:49,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:00:49,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-15 18:00:49,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-10-15 18:00:49,280 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-15 18:00:49,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:00:49,381 INFO L93 Difference]: Finished difference Result 87 states and 94 transitions. [2022-10-15 18:00:49,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-15 18:00:49,382 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-10-15 18:00:49,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:00:49,383 INFO L225 Difference]: With dead ends: 87 [2022-10-15 18:00:49,383 INFO L226 Difference]: Without dead ends: 87 [2022-10-15 18:00:49,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-10-15 18:00:49,384 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 43 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:00:49,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 112 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:00:49,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-10-15 18:00:49,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-10-15 18:00:49,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 63 states have (on average 1.1904761904761905) internal successors, (75), 73 states have internal predecessors, (75), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-10-15 18:00:49,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 94 transitions. [2022-10-15 18:00:49,395 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 94 transitions. Word has length 28 [2022-10-15 18:00:49,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:00:49,395 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 94 transitions. [2022-10-15 18:00:49,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-15 18:00:49,395 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 94 transitions. [2022-10-15 18:00:49,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-10-15 18:00:49,396 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:00:49,396 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:00:49,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-10-15 18:00:49,397 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-15 18:00:49,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:00:49,397 INFO L85 PathProgramCache]: Analyzing trace with hash -455829472, now seen corresponding path program 1 times [2022-10-15 18:00:49,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:00:49,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416020382] [2022-10-15 18:00:49,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:00:49,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:00:49,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:49,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-15 18:00:49,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:49,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-10-15 18:00:49,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:49,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:00:49,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:00:49,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416020382] [2022-10-15 18:00:49,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416020382] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:00:49,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:00:49,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-15 18:00:49,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202616303] [2022-10-15 18:00:49,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:00:49,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-15 18:00:49,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:00:49,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-15 18:00:49,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-15 18:00:49,458 INFO L87 Difference]: Start difference. First operand 87 states and 94 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-15 18:00:49,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:00:49,508 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2022-10-15 18:00:49,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 18:00:49,508 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-10-15 18:00:49,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:00:49,509 INFO L225 Difference]: With dead ends: 86 [2022-10-15 18:00:49,509 INFO L226 Difference]: Without dead ends: 86 [2022-10-15 18:00:49,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-10-15 18:00:49,510 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 37 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:00:49,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 122 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:00:49,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-10-15 18:00:49,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-10-15 18:00:49,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 63 states have (on average 1.1746031746031746) internal successors, (74), 72 states have internal predecessors, (74), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-10-15 18:00:49,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2022-10-15 18:00:49,516 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 29 [2022-10-15 18:00:49,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:00:49,517 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2022-10-15 18:00:49,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-15 18:00:49,517 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2022-10-15 18:00:49,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-10-15 18:00:49,518 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:00:49,518 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:00:49,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-10-15 18:00:49,518 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-15 18:00:49,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:00:49,519 INFO L85 PathProgramCache]: Analyzing trace with hash 937068099, now seen corresponding path program 1 times [2022-10-15 18:00:49,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:00:49,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097940138] [2022-10-15 18:00:49,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:00:49,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:00:49,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:49,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-15 18:00:49,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:50,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 18:00:50,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:50,080 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 18:00:50,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:00:50,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097940138] [2022-10-15 18:00:50,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097940138] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:00:50,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027534139] [2022-10-15 18:00:50,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:00:50,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:00:50,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:00:50,085 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:00:50,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-15 18:00:50,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:50,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 52 conjunts are in the unsatisfiable core [2022-10-15 18:00:50,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:00:50,166 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 18:00:50,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 18:00:50,593 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-15 18:00:50,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-10-15 18:00:50,607 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-15 18:00:50,608 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-15 18:00:50,789 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 18:00:50,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:00:51,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027534139] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:00:51,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 18:00:51,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2022-10-15 18:00:51,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809431751] [2022-10-15 18:00:51,281 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 18:00:51,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-10-15 18:00:51,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:00:51,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-10-15 18:00:51,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1434, Unknown=0, NotChecked=0, Total=1560 [2022-10-15 18:00:51,284 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand has 32 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 25 states have internal predecessors, (43), 7 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-15 18:00:51,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:00:51,898 INFO L93 Difference]: Finished difference Result 132 states and 143 transitions. [2022-10-15 18:00:51,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-15 18:00:51,899 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 25 states have internal predecessors, (43), 7 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 31 [2022-10-15 18:00:51,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:00:51,900 INFO L225 Difference]: With dead ends: 132 [2022-10-15 18:00:51,900 INFO L226 Difference]: Without dead ends: 132 [2022-10-15 18:00:51,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=222, Invalid=2328, Unknown=0, NotChecked=0, Total=2550 [2022-10-15 18:00:51,903 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 105 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 18:00:51,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 778 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 449 Invalid, 0 Unknown, 54 Unchecked, 0.3s Time] [2022-10-15 18:00:51,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-10-15 18:00:51,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 111. [2022-10-15 18:00:51,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 81 states have (on average 1.1728395061728396) internal successors, (95), 93 states have internal predecessors, (95), 12 states have call successors, (12), 9 states have call predecessors, (12), 12 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2022-10-15 18:00:51,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 122 transitions. [2022-10-15 18:00:51,910 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 122 transitions. Word has length 31 [2022-10-15 18:00:51,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:00:51,910 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 122 transitions. [2022-10-15 18:00:51,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 25 states have internal predecessors, (43), 7 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-15 18:00:51,910 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 122 transitions. [2022-10-15 18:00:51,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-10-15 18:00:51,911 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:00:51,911 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:00:51,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-15 18:00:52,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-10-15 18:00:52,125 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-15 18:00:52,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:00:52,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1245811664, now seen corresponding path program 1 times [2022-10-15 18:00:52,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:00:52,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119086545] [2022-10-15 18:00:52,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:00:52,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:00:52,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:52,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-15 18:00:52,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:52,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-10-15 18:00:52,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:52,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:00:52,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:00:52,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119086545] [2022-10-15 18:00:52,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119086545] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:00:52,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:00:52,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-15 18:00:52,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936168349] [2022-10-15 18:00:52,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:00:52,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-15 18:00:52,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:00:52,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-15 18:00:52,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-15 18:00:52,222 INFO L87 Difference]: Start difference. First operand 111 states and 122 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-15 18:00:52,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:00:52,296 INFO L93 Difference]: Finished difference Result 110 states and 121 transitions. [2022-10-15 18:00:52,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 18:00:52,297 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2022-10-15 18:00:52,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:00:52,299 INFO L225 Difference]: With dead ends: 110 [2022-10-15 18:00:52,299 INFO L226 Difference]: Without dead ends: 110 [2022-10-15 18:00:52,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-10-15 18:00:52,301 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 33 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:00:52,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 104 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:00:52,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-10-15 18:00:52,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-10-15 18:00:52,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 81 states have (on average 1.1604938271604939) internal successors, (94), 92 states have internal predecessors, (94), 12 states have call successors, (12), 9 states have call predecessors, (12), 12 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2022-10-15 18:00:52,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2022-10-15 18:00:52,311 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 30 [2022-10-15 18:00:52,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:00:52,311 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2022-10-15 18:00:52,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-15 18:00:52,311 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2022-10-15 18:00:52,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-10-15 18:00:52,313 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:00:52,313 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:00:52,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-10-15 18:00:52,313 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting rec_strcopy_helperErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-15 18:00:52,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:00:52,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1015660059, now seen corresponding path program 1 times [2022-10-15 18:00:52,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:00:52,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403315048] [2022-10-15 18:00:52,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:00:52,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:00:52,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:52,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-15 18:00:52,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:52,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 18:00:52,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:52,612 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-15 18:00:52,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:00:52,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403315048] [2022-10-15 18:00:52,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403315048] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:00:52,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625493206] [2022-10-15 18:00:52,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:00:52,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:00:52,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:00:52,614 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:00:52,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-15 18:00:52,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:52,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 24 conjunts are in the unsatisfiable core [2022-10-15 18:00:52,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:00:52,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 18:00:52,846 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-15 18:00:52,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:00:53,122 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-15 18:00:53,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625493206] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:00:53,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:00:53,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 23 [2022-10-15 18:00:53,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561746545] [2022-10-15 18:00:53,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:00:53,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-10-15 18:00:53,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:00:53,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-10-15 18:00:53,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-10-15 18:00:53,125 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 24 states, 20 states have (on average 2.2) internal successors, (44), 15 states have internal predecessors, (44), 6 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-15 18:00:53,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:00:53,409 INFO L93 Difference]: Finished difference Result 136 states and 147 transitions. [2022-10-15 18:00:53,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-15 18:00:53,411 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 2.2) internal successors, (44), 15 states have internal predecessors, (44), 6 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2022-10-15 18:00:53,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:00:53,413 INFO L225 Difference]: With dead ends: 136 [2022-10-15 18:00:53,413 INFO L226 Difference]: Without dead ends: 136 [2022-10-15 18:00:53,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-10-15 18:00:53,414 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 72 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 18:00:53,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 723 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 18:00:53,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-10-15 18:00:53,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 119. [2022-10-15 18:00:53,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 88 states have (on average 1.1704545454545454) internal successors, (103), 100 states have internal predecessors, (103), 13 states have call successors, (13), 10 states have call predecessors, (13), 13 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2022-10-15 18:00:53,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 132 transitions. [2022-10-15 18:00:53,421 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 132 transitions. Word has length 32 [2022-10-15 18:00:53,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:00:53,421 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 132 transitions. [2022-10-15 18:00:53,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 2.2) internal successors, (44), 15 states have internal predecessors, (44), 6 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-15 18:00:53,421 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 132 transitions. [2022-10-15 18:00:53,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-10-15 18:00:53,422 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:00:53,422 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:00:53,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-15 18:00:53,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:00:53,637 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-15 18:00:53,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:00:53,638 INFO L85 PathProgramCache]: Analyzing trace with hash 34544162, now seen corresponding path program 1 times [2022-10-15 18:00:53,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:00:53,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163624721] [2022-10-15 18:00:53,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:00:53,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:00:53,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:53,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-15 18:00:53,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:53,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-10-15 18:00:53,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:53,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:00:53,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:00:53,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163624721] [2022-10-15 18:00:53,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163624721] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:00:53,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:00:53,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-10-15 18:00:53,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131878402] [2022-10-15 18:00:53,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:00:53,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-15 18:00:53,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:00:53,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-15 18:00:53,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-10-15 18:00:53,798 INFO L87 Difference]: Start difference. First operand 119 states and 132 transitions. Second operand has 10 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-15 18:00:53,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:00:53,990 INFO L93 Difference]: Finished difference Result 118 states and 131 transitions. [2022-10-15 18:00:53,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-15 18:00:53,991 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2022-10-15 18:00:53,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:00:53,992 INFO L225 Difference]: With dead ends: 118 [2022-10-15 18:00:53,992 INFO L226 Difference]: Without dead ends: 118 [2022-10-15 18:00:53,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-10-15 18:00:53,994 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 40 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:00:53,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 131 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:00:53,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-10-15 18:00:53,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2022-10-15 18:00:54,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 88 states have (on average 1.1590909090909092) internal successors, (102), 99 states have internal predecessors, (102), 13 states have call successors, (13), 10 states have call predecessors, (13), 13 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2022-10-15 18:00:54,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 131 transitions. [2022-10-15 18:00:54,001 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 131 transitions. Word has length 31 [2022-10-15 18:00:54,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:00:54,001 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 131 transitions. [2022-10-15 18:00:54,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-15 18:00:54,001 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 131 transitions. [2022-10-15 18:00:54,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-10-15 18:00:54,002 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:00:54,002 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:00:54,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-10-15 18:00:54,003 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-15 18:00:54,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:00:54,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1070869107, now seen corresponding path program 1 times [2022-10-15 18:00:54,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:00:54,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595555261] [2022-10-15 18:00:54,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:00:54,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:00:54,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:54,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-15 18:00:54,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:54,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-10-15 18:00:54,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:54,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:00:54,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:00:54,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595555261] [2022-10-15 18:00:54,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595555261] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:00:54,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:00:54,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-10-15 18:00:54,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721048119] [2022-10-15 18:00:54,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:00:54,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-15 18:00:54,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:00:54,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-15 18:00:54,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-10-15 18:00:54,277 INFO L87 Difference]: Start difference. First operand 118 states and 131 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-15 18:00:54,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:00:54,566 INFO L93 Difference]: Finished difference Result 117 states and 130 transitions. [2022-10-15 18:00:54,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-15 18:00:54,566 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2022-10-15 18:00:54,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:00:54,567 INFO L225 Difference]: With dead ends: 117 [2022-10-15 18:00:54,567 INFO L226 Difference]: Without dead ends: 76 [2022-10-15 18:00:54,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-10-15 18:00:54,568 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 28 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:00:54,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 157 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:00:54,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-10-15 18:00:54,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2022-10-15 18:00:54,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 55 states have internal predecessors, (59), 9 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-10-15 18:00:54,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2022-10-15 18:00:54,573 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 32 [2022-10-15 18:00:54,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:00:54,573 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2022-10-15 18:00:54,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-15 18:00:54,573 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2022-10-15 18:00:54,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-10-15 18:00:54,574 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:00:54,574 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:00:54,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-10-15 18:00:54,574 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-15 18:00:54,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:00:54,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1379702746, now seen corresponding path program 2 times [2022-10-15 18:00:54,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:00:54,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081299101] [2022-10-15 18:00:54,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:00:54,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:00:54,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:54,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-15 18:00:55,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:55,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 18:00:55,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:55,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 18:00:55,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:55,196 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-15 18:00:55,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:00:55,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081299101] [2022-10-15 18:00:55,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081299101] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:00:55,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377364138] [2022-10-15 18:00:55,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:00:55,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:00:55,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:00:55,199 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:00:55,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-15 18:00:55,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 18:00:55,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:00:55,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 53 conjunts are in the unsatisfiable core [2022-10-15 18:00:55,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:00:55,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 18:00:55,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:00:55,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-10-15 18:00:55,729 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-15 18:00:55,730 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-15 18:00:55,906 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-15 18:00:55,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:00:56,394 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 27 treesize of output 23 [2022-10-15 18:00:56,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377364138] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:00:56,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 18:00:56,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2022-10-15 18:00:56,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315183878] [2022-10-15 18:00:56,462 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 18:00:56,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-10-15 18:00:56,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:00:56,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-10-15 18:00:56,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1572, Unknown=0, NotChecked=0, Total=1722 [2022-10-15 18:00:56,464 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 34 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 27 states have internal predecessors, (54), 9 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-15 18:00:56,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:00:56,904 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2022-10-15 18:00:56,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-10-15 18:00:56,904 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 27 states have internal predecessors, (54), 9 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 38 [2022-10-15 18:00:56,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:00:56,905 INFO L225 Difference]: With dead ends: 82 [2022-10-15 18:00:56,905 INFO L226 Difference]: Without dead ends: 82 [2022-10-15 18:00:56,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=228, Invalid=2222, Unknown=0, NotChecked=0, Total=2450 [2022-10-15 18:00:56,907 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 49 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 18:00:56,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 372 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 334 Invalid, 0 Unknown, 56 Unchecked, 0.2s Time] [2022-10-15 18:00:56,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-10-15 18:00:56,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 53. [2022-10-15 18:00:56,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 40 states have (on average 1.125) internal successors, (45), 42 states have internal predecessors, (45), 7 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-15 18:00:56,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2022-10-15 18:00:56,911 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 38 [2022-10-15 18:00:56,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:00:56,911 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2022-10-15 18:00:56,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 27 states have internal predecessors, (54), 9 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-15 18:00:56,912 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2022-10-15 18:00:56,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-10-15 18:00:56,912 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:00:56,912 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:00:56,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-15 18:00:57,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:00:57,126 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-15 18:00:57,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:00:57,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1016175646, now seen corresponding path program 3 times [2022-10-15 18:00:57,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:00:57,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844023317] [2022-10-15 18:00:57,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:00:57,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:00:57,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:57,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-15 18:00:57,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:57,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 18:00:57,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:00:57,888 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 18:00:57,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:00:57,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844023317] [2022-10-15 18:00:57,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844023317] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:00:57,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672286817] [2022-10-15 18:00:57,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 18:00:57,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:00:57,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:00:57,891 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:00:57,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-15 18:00:57,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-10-15 18:00:57,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:00:57,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 78 conjunts are in the unsatisfiable core [2022-10-15 18:00:57,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:00:58,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 18:00:58,009 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 18:00:58,548 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-15 18:00:58,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-10-15 18:00:58,570 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-15 18:00:58,570 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-15 18:00:58,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-10-15 18:00:58,986 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-10-15 18:00:59,070 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-15 18:00:59,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-10-15 18:00:59,289 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 18:00:59,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:00:59,700 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_rec_strcopy_helper_~source.offset_15 Int) (v_ArrVal_236 (Array Int Int))) (or (not (<= v_rec_strcopy_helper_~source.offset_15 |c_rec_strcopy_helper_#in~source.offset|)) (<= (+ v_rec_strcopy_helper_~source.offset_15 2) (select |c_#length| |c_rec_strcopy_helper_#in~source.base|)) (= (select (select (store |c_#memory_int| |c_rec_strcopy_helper_#in~dest.base| v_ArrVal_236) |c_rec_strcopy_helper_#in~source.base|) v_rec_strcopy_helper_~source.offset_15) 0) (not (<= 0 v_rec_strcopy_helper_~source.offset_15)))) is different from false [2022-10-15 18:00:59,749 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_rec_strcopy_helper_~source.offset_15 Int) (v_ArrVal_236 (Array Int Int))) (or (<= (+ v_rec_strcopy_helper_~source.offset_15 2) (select |c_#length| c_rec_strcopy_helper_~source.base)) (< (+ c_rec_strcopy_helper_~source.offset 1) v_rec_strcopy_helper_~source.offset_15) (= (select (select (store |c_#memory_int| c_rec_strcopy_helper_~dest.base v_ArrVal_236) c_rec_strcopy_helper_~source.base) v_rec_strcopy_helper_~source.offset_15) 0) (not (<= 0 v_rec_strcopy_helper_~source.offset_15)))) is different from false [2022-10-15 18:00:59,839 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_rec_strcopy_helper_~source.offset_15 Int) (v_ArrVal_236 (Array Int Int))) (or (<= (+ v_rec_strcopy_helper_~source.offset_15 2) (select |c_#length| |c_rec_strcopy_helper_#in~source.base|)) (= (select (select (store |c_#memory_int| |c_rec_strcopy_helper_#in~dest.base| v_ArrVal_236) |c_rec_strcopy_helper_#in~source.base|) v_rec_strcopy_helper_~source.offset_15) 0) (< (+ 1 |c_rec_strcopy_helper_#in~source.offset|) v_rec_strcopy_helper_~source.offset_15) (not (<= 0 v_rec_strcopy_helper_~source.offset_15)))) is different from false [2022-10-15 18:00:59,858 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_rec_strcopy_helper_~source.offset_15 Int) (v_ArrVal_236 (Array Int Int))) (or (< (+ |c_ULTIMATE.start_rec_strcopy_~source#1.offset| 1) v_rec_strcopy_helper_~source.offset_15) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_rec_strcopy_~copyAlloc~0#1.base| v_ArrVal_236) |c_ULTIMATE.start_rec_strcopy_~source#1.base|) v_rec_strcopy_helper_~source.offset_15) 0) (<= (+ v_rec_strcopy_helper_~source.offset_15 2) (select |c_#length| |c_ULTIMATE.start_rec_strcopy_~source#1.base|)) (not (<= 0 v_rec_strcopy_helper_~source.offset_15)))) is different from false [2022-10-15 18:00:59,880 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_234 Int) (|v_ULTIMATE.start_rec_strcopy_~copyAlloc~0#1.base_11| Int) (v_rec_strcopy_helper_~source.offset_15 Int) (v_ArrVal_236 (Array Int Int))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_rec_strcopy_~copyAlloc~0#1.base_11|) 0)) (< (+ |c_ULTIMATE.start_rec_strcopy_~source#1.offset| 1) v_rec_strcopy_helper_~source.offset_15) (= (select (select (store |c_#memory_int| |v_ULTIMATE.start_rec_strcopy_~copyAlloc~0#1.base_11| v_ArrVal_236) |c_ULTIMATE.start_rec_strcopy_~source#1.base|) v_rec_strcopy_helper_~source.offset_15) 0) (<= (+ v_rec_strcopy_helper_~source.offset_15 2) (select (store |c_#length| |v_ULTIMATE.start_rec_strcopy_~copyAlloc~0#1.base_11| v_ArrVal_234) |c_ULTIMATE.start_rec_strcopy_~source#1.base|)) (not (<= 0 v_rec_strcopy_helper_~source.offset_15)))) is different from false [2022-10-15 18:00:59,992 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-15 18:00:59,992 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-10-15 18:01:00,003 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 9 treesize of output 7 [2022-10-15 18:01:00,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672286817] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:01:00,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 18:01:00,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23] total 40 [2022-10-15 18:01:00,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283974248] [2022-10-15 18:01:00,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 18:01:00,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-10-15 18:01:00,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:01:00,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-10-15 18:01:00,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2016, Unknown=9, NotChecked=470, Total=2652 [2022-10-15 18:01:00,174 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 40 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 32 states have internal predecessors, (59), 10 states have call successors, (10), 8 states have call predecessors, (10), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-15 18:01:01,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:01:01,146 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2022-10-15 18:01:01,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-10-15 18:01:01,147 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 32 states have internal predecessors, (59), 10 states have call successors, (10), 8 states have call predecessors, (10), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 38 [2022-10-15 18:01:01,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:01:01,149 INFO L225 Difference]: With dead ends: 81 [2022-10-15 18:01:01,149 INFO L226 Difference]: Without dead ends: 61 [2022-10-15 18:01:01,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=283, Invalid=3759, Unknown=10, NotChecked=640, Total=4692 [2022-10-15 18:01:01,152 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 20 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:01:01,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 282 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 124 Unchecked, 0.1s Time] [2022-10-15 18:01:01,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-10-15 18:01:01,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2022-10-15 18:01:01,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 40 states have (on average 1.1) internal successors, (44), 42 states have internal predecessors, (44), 7 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-15 18:01:01,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2022-10-15 18:01:01,160 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 38 [2022-10-15 18:01:01,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:01:01,160 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2022-10-15 18:01:01,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 32 states have internal predecessors, (59), 10 states have call successors, (10), 8 states have call predecessors, (10), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-15 18:01:01,160 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2022-10-15 18:01:01,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-10-15 18:01:01,162 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:01:01,162 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:01:01,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-15 18:01:01,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:01:01,366 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-15 18:01:01,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:01:01,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1237050023, now seen corresponding path program 4 times [2022-10-15 18:01:01,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:01:01,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053625191] [2022-10-15 18:01:01,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:01:01,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:01:01,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:01:01,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-15 18:01:01,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:01:02,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 18:01:02,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:01:02,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 18:01:02,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:01:02,186 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-15 18:01:02,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:01:02,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053625191] [2022-10-15 18:01:02,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053625191] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:01:02,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860333994] [2022-10-15 18:01:02,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-15 18:01:02,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:01:02,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:01:02,188 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:01:02,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-15 18:01:02,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-15 18:01:02,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:01:02,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 68 conjunts are in the unsatisfiable core [2022-10-15 18:01:02,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:01:02,653 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-15 18:01:02,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-10-15 18:01:02,667 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-15 18:01:02,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-15 18:01:03,033 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:01:03,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:01:03,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-15 18:01:03,646 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 13 treesize of output 9 [2022-10-15 18:01:03,653 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-15 18:01:03,653 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-10-15 18:01:03,868 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-15 18:01:03,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-10-15 18:01:03,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860333994] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:01:03,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 18:01:03,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2022-10-15 18:01:03,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175844285] [2022-10-15 18:01:03,957 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 18:01:03,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-10-15 18:01:03,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:01:03,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-10-15 18:01:03,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=2189, Unknown=0, NotChecked=0, Total=2352 [2022-10-15 18:01:03,959 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 38 states, 33 states have (on average 2.0) internal successors, (66), 29 states have internal predecessors, (66), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-15 18:01:04,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:01:04,947 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2022-10-15 18:01:04,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-10-15 18:01:04,954 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 33 states have (on average 2.0) internal successors, (66), 29 states have internal predecessors, (66), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 45 [2022-10-15 18:01:04,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:01:04,955 INFO L225 Difference]: With dead ends: 71 [2022-10-15 18:01:04,955 INFO L226 Difference]: Without dead ends: 71 [2022-10-15 18:01:04,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=305, Invalid=3355, Unknown=0, NotChecked=0, Total=3660 [2022-10-15 18:01:04,958 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 69 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-15 18:01:04,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 401 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 638 Invalid, 0 Unknown, 42 Unchecked, 0.4s Time] [2022-10-15 18:01:04,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-10-15 18:01:04,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 60. [2022-10-15 18:01:04,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 46 states have (on average 1.108695652173913) internal successors, (51), 48 states have internal predecessors, (51), 8 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-15 18:01:04,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2022-10-15 18:01:04,970 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 45 [2022-10-15 18:01:04,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:01:04,970 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2022-10-15 18:01:04,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 33 states have (on average 2.0) internal successors, (66), 29 states have internal predecessors, (66), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-15 18:01:04,971 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2022-10-15 18:01:04,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-10-15 18:01:04,971 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:01:04,972 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:01:05,013 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 18:01:05,173 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,SelfDestructingSolverStorable24 [2022-10-15 18:01:05,174 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting rec_strcopy_helperErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-15 18:01:05,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:01:05,175 INFO L85 PathProgramCache]: Analyzing trace with hash -306155007, now seen corresponding path program 2 times [2022-10-15 18:01:05,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:01:05,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823119079] [2022-10-15 18:01:05,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:01:05,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:01:05,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:01:05,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-15 18:01:05,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:01:05,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 18:01:05,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:01:05,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 18:01:05,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:01:05,579 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-10-15 18:01:05,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:01:05,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823119079] [2022-10-15 18:01:05,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823119079] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:01:05,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225819089] [2022-10-15 18:01:05,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:01:05,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:01:05,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:01:05,584 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:01:05,595 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 18:01:05,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 18:01:05,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:01:05,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 34 conjunts are in the unsatisfiable core [2022-10-15 18:01:05,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:01:05,739 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 18:01:05,956 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-10-15 18:01:05,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:01:06,442 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-10-15 18:01:06,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225819089] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:01:06,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:01:06,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 31 [2022-10-15 18:01:06,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888275505] [2022-10-15 18:01:06,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:01:06,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-10-15 18:01:06,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:01:06,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-10-15 18:01:06,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2022-10-15 18:01:06,444 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 32 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 19 states have internal predecessors, (64), 9 states have call successors, (11), 10 states have call predecessors, (11), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-15 18:01:06,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:01:06,741 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2022-10-15 18:01:06,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-15 18:01:06,743 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 19 states have internal predecessors, (64), 9 states have call successors, (11), 10 states have call predecessors, (11), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 46 [2022-10-15 18:01:06,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:01:06,744 INFO L225 Difference]: With dead ends: 70 [2022-10-15 18:01:06,745 INFO L226 Difference]: Without dead ends: 70 [2022-10-15 18:01:06,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 73 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2022-10-15 18:01:06,746 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 85 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 18:01:06,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 402 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 18:01:06,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-10-15 18:01:06,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 60. [2022-10-15 18:01:06,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 48 states have internal predecessors, (50), 8 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-15 18:01:06,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-10-15 18:01:06,752 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 46 [2022-10-15 18:01:06,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:01:06,752 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-10-15 18:01:06,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 19 states have internal predecessors, (64), 9 states have call successors, (11), 10 states have call predecessors, (11), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-15 18:01:06,752 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-10-15 18:01:06,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-10-15 18:01:06,753 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:01:06,753 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:01:06,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-15 18:01:06,964 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,SelfDestructingSolverStorable25 [2022-10-15 18:01:06,964 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-15 18:01:06,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:01:06,965 INFO L85 PathProgramCache]: Analyzing trace with hash -72988870, now seen corresponding path program 5 times [2022-10-15 18:01:06,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:01:06,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323875145] [2022-10-15 18:01:06,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:01:06,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:01:07,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:01:08,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-15 18:01:08,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:01:08,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 18:01:08,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:01:08,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 18:01:08,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:01:08,439 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-15 18:01:08,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:01:08,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323875145] [2022-10-15 18:01:08,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323875145] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:01:08,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50117570] [2022-10-15 18:01:08,440 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-10-15 18:01:08,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:01:08,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:01:08,441 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 18:01:08,443 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 18:01:08,532 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-10-15 18:01:08,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:01:08,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 108 conjunts are in the unsatisfiable core [2022-10-15 18:01:08,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:01:08,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 18:01:09,142 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-15 18:01:09,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-15 18:01:09,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-10-15 18:01:09,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-10-15 18:01:09,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-10-15 18:01:09,730 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-10-15 18:01:09,801 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-10-15 18:01:09,863 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:01:09,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:01:10,955 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_rec_strcopy_~source#1.offset| 2))) (and (or (<= 0 (+ |c_ULTIMATE.start_rec_strcopy_~source#1.offset| 3)) (forall ((|v_ULTIMATE.start_rec_strcopy_~copyAlloc~0#1.base_14| Int) (v_ArrVal_307 (Array Int Int))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_rec_strcopy_~copyAlloc~0#1.base_14|) 0)) (= (select (select (store |c_#memory_int| |v_ULTIMATE.start_rec_strcopy_~copyAlloc~0#1.base_14| v_ArrVal_307) |c_ULTIMATE.start_rec_strcopy_~source#1.base|) .cse0) 0)))) (forall ((|v_ULTIMATE.start_rec_strcopy_~copyAlloc~0#1.base_14| Int) (v_ArrVal_307 (Array Int Int))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_rec_strcopy_~copyAlloc~0#1.base_14|) 0)) (forall ((v_ArrVal_304 Int)) (<= (+ |c_ULTIMATE.start_rec_strcopy_~source#1.offset| 4) (select (store |c_#length| |v_ULTIMATE.start_rec_strcopy_~copyAlloc~0#1.base_14| v_ArrVal_304) |c_ULTIMATE.start_rec_strcopy_~source#1.base|))) (= (select (select (store |c_#memory_int| |v_ULTIMATE.start_rec_strcopy_~copyAlloc~0#1.base_14| v_ArrVal_307) |c_ULTIMATE.start_rec_strcopy_~source#1.base|) .cse0) 0))))) is different from false [2022-10-15 18:01:11,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 91 treesize of output 73 [2022-10-15 18:01:11,119 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 52 treesize of output 48 [2022-10-15 18:01:11,127 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-10-15 18:01:11,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 1 [2022-10-15 18:01:11,154 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 2 |c_rec_cstrlen_#in~s.offset|))) (and (or (forall ((|v_ULTIMATE.start_rec_strcopy_~copyAlloc~0#1.base_14| Int) (v_ArrVal_307 (Array Int Int))) (or (= (select (select (store |c_#memory_int| |v_ULTIMATE.start_rec_strcopy_~copyAlloc~0#1.base_14| v_ArrVal_307) |c_rec_cstrlen_#in~s.base|) .cse0) 0) (not (= (select |c_#valid| |v_ULTIMATE.start_rec_strcopy_~copyAlloc~0#1.base_14|) 0)))) (<= 0 (+ 3 |c_rec_cstrlen_#in~s.offset|))) (forall ((|v_ULTIMATE.start_rec_strcopy_~copyAlloc~0#1.base_14| Int) (v_ArrVal_307 (Array Int Int))) (or (= (select (select (store |c_#memory_int| |v_ULTIMATE.start_rec_strcopy_~copyAlloc~0#1.base_14| v_ArrVal_307) |c_rec_cstrlen_#in~s.base|) .cse0) 0) (not (= (select |c_#valid| |v_ULTIMATE.start_rec_strcopy_~copyAlloc~0#1.base_14|) 0)) (forall ((v_ArrVal_304 Int)) (<= (+ 4 |c_rec_cstrlen_#in~s.offset|) (select (store |c_#length| |v_ULTIMATE.start_rec_strcopy_~copyAlloc~0#1.base_14| v_ArrVal_304) |c_rec_cstrlen_#in~s.base|))))))) is different from false [2022-10-15 18:01:11,308 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-15 18:01:11,308 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 84 [2022-10-15 18:01:11,318 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 68 treesize of output 64 [2022-10-15 18:01:11,324 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 64 treesize of output 60 [2022-10-15 18:01:11,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50117570] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:01:11,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 18:01:11,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2022-10-15 18:01:11,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211773139] [2022-10-15 18:01:11,606 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 18:01:11,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-10-15 18:01:11,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:01:11,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-10-15 18:01:11,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=2975, Unknown=3, NotChecked=222, Total=3422 [2022-10-15 18:01:11,608 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 44 states, 39 states have (on average 2.0) internal successors, (78), 34 states have internal predecessors, (78), 14 states have call successors, (14), 10 states have call predecessors, (14), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-15 18:01:13,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:01:13,829 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2022-10-15 18:01:13,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-10-15 18:01:13,829 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 2.0) internal successors, (78), 34 states have internal predecessors, (78), 14 states have call successors, (14), 10 states have call predecessors, (14), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 52 [2022-10-15 18:01:13,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:01:13,830 INFO L225 Difference]: With dead ends: 109 [2022-10-15 18:01:13,830 INFO L226 Difference]: Without dead ends: 81 [2022-10-15 18:01:13,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1232 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=537, Invalid=6110, Unknown=3, NotChecked=322, Total=6972 [2022-10-15 18:01:13,833 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 63 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-15 18:01:13,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 470 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 834 Invalid, 0 Unknown, 219 Unchecked, 0.6s Time] [2022-10-15 18:01:13,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-10-15 18:01:13,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 69. [2022-10-15 18:01:13,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 56 states have internal predecessors, (58), 9 states have call successors, (9), 8 states have call predecessors, (9), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-10-15 18:01:13,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2022-10-15 18:01:13,838 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 52 [2022-10-15 18:01:13,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:01:13,839 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2022-10-15 18:01:13,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 2.0) internal successors, (78), 34 states have internal predecessors, (78), 14 states have call successors, (14), 10 states have call predecessors, (14), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-15 18:01:13,839 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2022-10-15 18:01:13,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-10-15 18:01:13,839 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:01:13,840 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:01:13,867 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 18:01:14,044 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,SelfDestructingSolverStorable26 [2022-10-15 18:01:14,045 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting rec_strcopy_helperErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-15 18:01:14,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:01:14,046 INFO L85 PathProgramCache]: Analyzing trace with hash -36397797, now seen corresponding path program 3 times [2022-10-15 18:01:14,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:01:14,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355313698] [2022-10-15 18:01:14,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:01:14,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:01:14,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:01:14,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-15 18:01:14,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:01:14,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 18:01:14,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:01:14,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 18:01:14,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:01:14,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 18:01:14,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:01:14,647 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 7 proven. 38 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-15 18:01:14,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:01:14,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355313698] [2022-10-15 18:01:14,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355313698] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:01:14,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358725897] [2022-10-15 18:01:14,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 18:01:14,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:01:14,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:01:14,651 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 18:01:14,672 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 18:01:14,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-10-15 18:01:14,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:01:14,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 40 conjunts are in the unsatisfiable core [2022-10-15 18:01:14,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:01:14,829 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 18:01:15,224 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-15 18:01:15,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:01:16,095 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-15 18:01:16,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358725897] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:01:16,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:01:16,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 40 [2022-10-15 18:01:16,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250564436] [2022-10-15 18:01:16,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:01:16,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-10-15 18:01:16,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:01:16,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-10-15 18:01:16,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1486, Unknown=0, NotChecked=0, Total=1640 [2022-10-15 18:01:16,098 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 41 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 24 states have internal predecessors, (87), 13 states have call successors, (14), 13 states have call predecessors, (14), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2022-10-15 18:01:16,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:01:16,717 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2022-10-15 18:01:16,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-10-15 18:01:16,722 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 24 states have internal predecessors, (87), 13 states have call successors, (14), 13 states have call predecessors, (14), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) Word has length 60 [2022-10-15 18:01:16,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:01:16,723 INFO L225 Difference]: With dead ends: 80 [2022-10-15 18:01:16,723 INFO L226 Difference]: Without dead ends: 80 [2022-10-15 18:01:16,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 97 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=238, Invalid=2018, Unknown=0, NotChecked=0, Total=2256 [2022-10-15 18:01:16,725 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 147 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 18:01:16,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 587 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 18:01:16,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-10-15 18:01:16,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2022-10-15 18:01:16,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 56 states have internal predecessors, (57), 9 states have call successors, (9), 8 states have call predecessors, (9), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-10-15 18:01:16,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2022-10-15 18:01:16,729 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 60 [2022-10-15 18:01:16,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:01:16,730 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2022-10-15 18:01:16,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 24 states have internal predecessors, (87), 13 states have call successors, (14), 13 states have call predecessors, (14), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2022-10-15 18:01:16,730 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2022-10-15 18:01:16,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-10-15 18:01:16,731 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:01:16,731 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:01:16,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-10-15 18:01:16,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-10-15 18:01:16,944 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-15 18:01:16,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:01:16,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1206896940, now seen corresponding path program 6 times [2022-10-15 18:01:16,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:01:16,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58928658] [2022-10-15 18:01:16,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:01:16,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:01:16,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:01:18,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-15 18:01:18,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:01:18,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 18:01:18,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:01:18,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 18:01:18,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:01:18,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-15 18:01:18,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:01:18,891 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 10 proven. 65 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-10-15 18:01:18,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:01:18,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58928658] [2022-10-15 18:01:18,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58928658] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:01:18,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667838138] [2022-10-15 18:01:18,892 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-10-15 18:01:18,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:01:18,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:01:18,894 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:01:18,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-10-15 18:01:19,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-10-15 18:01:19,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:01:19,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 148 conjunts are in the unsatisfiable core [2022-10-15 18:01:19,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:01:19,039 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 18:01:19,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-15 18:01:20,513 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-15 18:01:20,514 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-10-15 18:01:20,557 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-15 18:01:20,558 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-15 18:01:20,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-10-15 18:01:21,248 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-10-15 18:01:21,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-10-15 18:01:21,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-10-15 18:01:22,013 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-15 18:01:22,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-10-15 18:01:22,317 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 25 proven. 53 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-15 18:01:22,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:01:24,201 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-15 18:01:24,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-10-15 18:01:24,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667838138] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:01:24,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 18:01:24,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 29] total 54 [2022-10-15 18:01:24,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957688424] [2022-10-15 18:01:24,332 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 18:01:24,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-10-15 18:01:24,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:01:24,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-10-15 18:01:24,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=4757, Unknown=9, NotChecked=0, Total=5112 [2022-10-15 18:01:24,334 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 55 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 41 states have internal predecessors, (95), 16 states have call successors, (16), 13 states have call predecessors, (16), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-10-15 18:01:25,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:01:25,257 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2022-10-15 18:01:25,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-10-15 18:01:25,258 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 41 states have internal predecessors, (95), 16 states have call successors, (16), 13 states have call predecessors, (16), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 66 [2022-10-15 18:01:25,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:01:25,259 INFO L225 Difference]: With dead ends: 88 [2022-10-15 18:01:25,259 INFO L226 Difference]: Without dead ends: 88 [2022-10-15 18:01:25,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1627 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=432, Invalid=6039, Unknown=9, NotChecked=0, Total=6480 [2022-10-15 18:01:25,262 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 42 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 324 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 18:01:25,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 793 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 262 Invalid, 0 Unknown, 324 Unchecked, 0.2s Time] [2022-10-15 18:01:25,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-10-15 18:01:25,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 76. [2022-10-15 18:01:25,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 62 states have internal predecessors, (64), 10 states have call successors, (10), 9 states have call predecessors, (10), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-10-15 18:01:25,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2022-10-15 18:01:25,267 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 66 [2022-10-15 18:01:25,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:01:25,267 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2022-10-15 18:01:25,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 41 states have internal predecessors, (95), 16 states have call successors, (16), 13 states have call predecessors, (16), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-10-15 18:01:25,268 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2022-10-15 18:01:25,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-10-15 18:01:25,268 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:01:25,268 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:01:25,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-10-15 18:01:25,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-10-15 18:01:25,484 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting rec_strcopy_helperErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-10-15 18:01:25,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:01:25,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1240900468, now seen corresponding path program 4 times [2022-10-15 18:01:25,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:01:25,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691109557] [2022-10-15 18:01:25,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:01:25,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:01:25,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat