/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-crafted/bor2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 16:15:40,482 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 16:15:40,485 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 16:15:40,520 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 16:15:40,520 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 16:15:40,522 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 16:15:40,542 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 16:15:40,550 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 16:15:40,552 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 16:15:40,553 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 16:15:40,554 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 16:15:40,556 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 16:15:40,556 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 16:15:40,557 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 16:15:40,559 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 16:15:40,560 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 16:15:40,561 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 16:15:40,562 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 16:15:40,564 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 16:15:40,566 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 16:15:40,568 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 16:15:40,569 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 16:15:40,571 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 16:15:40,572 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 16:15:40,576 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-15 16:15:40,580 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-15 16:15:40,581 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-15 16:15:40,582 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-15 16:15:40,583 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-15 16:15:40,584 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-15 16:15:40,585 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-15 16:15:40,585 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-15 16:15:40,586 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-15 16:15:40,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 16:15:40,587 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 16:15:40,588 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 16:15:40,593 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-15 16:15:40,648 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 16:15:40,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 16:15:40,649 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 16:15:40,649 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 16:15:40,651 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 16:15:40,651 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 16:15:40,652 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 16:15:40,652 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 16:15:40,654 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 16:15:40,654 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 16:15:40,655 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 16:15:40,655 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 16:15:40,655 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 16:15:40,656 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 16:15:40,656 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 16:15:40,656 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 16:15:40,656 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 16:15:40,656 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 16:15:40,656 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 16:15:40,657 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 16:15:40,657 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 16:15:40,657 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 16:15:40,657 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 16:15:40,658 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 16:15:40,658 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 16:15:40,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 16:15:40,658 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 16:15:40,658 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 16:15:40,659 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 16:15:40,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 16:15:40,659 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 16:15:41,064 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 16:15:41,095 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 16:15:41,098 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 16:15:41,100 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 16:15:41,100 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 16:15:41,102 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/bor2.i [2022-10-15 16:15:41,197 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9b2b8f9f/7b827d24b6f848d3bd7d50f1f91dc012/FLAG7dbe641ec [2022-10-15 16:15:41,887 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 16:15:41,887 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/bor2.i [2022-10-15 16:15:41,897 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9b2b8f9f/7b827d24b6f848d3bd7d50f1f91dc012/FLAG7dbe641ec [2022-10-15 16:15:42,256 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9b2b8f9f/7b827d24b6f848d3bd7d50f1f91dc012 [2022-10-15 16:15:42,261 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 16:15:42,270 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 16:15:42,274 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 16:15:42,275 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 16:15:42,279 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 16:15:42,281 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:15:42" (1/1) ... [2022-10-15 16:15:42,282 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63513eb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:15:42, skipping insertion in model container [2022-10-15 16:15:42,283 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:15:42" (1/1) ... [2022-10-15 16:15:42,291 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 16:15:42,314 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 16:15:42,507 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/bor2.i[1291,1304] [2022-10-15 16:15:42,511 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 16:15:42,521 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 16:15:42,548 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/bor2.i[1291,1304] [2022-10-15 16:15:42,550 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 16:15:42,569 INFO L208 MainTranslator]: Completed translation [2022-10-15 16:15:42,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:15:42 WrapperNode [2022-10-15 16:15:42,570 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 16:15:42,571 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 16:15:42,572 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 16:15:42,572 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 16:15:42,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:15:42" (1/1) ... [2022-10-15 16:15:42,593 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:15:42" (1/1) ... [2022-10-15 16:15:42,619 INFO L138 Inliner]: procedures = 16, calls = 31, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 74 [2022-10-15 16:15:42,620 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 16:15:42,620 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 16:15:42,621 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 16:15:42,621 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 16:15:42,635 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:15:42" (1/1) ... [2022-10-15 16:15:42,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:15:42" (1/1) ... [2022-10-15 16:15:42,639 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:15:42" (1/1) ... [2022-10-15 16:15:42,639 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:15:42" (1/1) ... [2022-10-15 16:15:42,647 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:15:42" (1/1) ... [2022-10-15 16:15:42,659 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:15:42" (1/1) ... [2022-10-15 16:15:42,661 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:15:42" (1/1) ... [2022-10-15 16:15:42,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:15:42" (1/1) ... [2022-10-15 16:15:42,668 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 16:15:42,672 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 16:15:42,672 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 16:15:42,673 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 16:15:42,674 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:15:42" (1/1) ... [2022-10-15 16:15:42,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 16:15:42,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:15:42,729 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-15 16:15:42,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-15 16:15:42,811 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 16:15:42,811 INFO L130 BoogieDeclarations]: Found specification of procedure bor [2022-10-15 16:15:42,812 INFO L138 BoogieDeclarations]: Found implementation of procedure bor [2022-10-15 16:15:42,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 16:15:42,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 16:15:42,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 16:15:42,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 16:15:42,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 16:15:42,813 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 16:15:42,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 16:15:42,907 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 16:15:42,910 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 16:15:43,232 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 16:15:43,241 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 16:15:43,241 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-10-15 16:15:43,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:15:43 BoogieIcfgContainer [2022-10-15 16:15:43,244 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 16:15:43,253 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 16:15:43,253 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 16:15:43,261 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 16:15:43,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 04:15:42" (1/3) ... [2022-10-15 16:15:43,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54e8708 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:15:43, skipping insertion in model container [2022-10-15 16:15:43,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:15:42" (2/3) ... [2022-10-15 16:15:43,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54e8708 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:15:43, skipping insertion in model container [2022-10-15 16:15:43,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:15:43" (3/3) ... [2022-10-15 16:15:43,270 INFO L112 eAbstractionObserver]: Analyzing ICFG bor2.i [2022-10-15 16:15:43,327 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 16:15:43,328 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2022-10-15 16:15:43,446 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 16:15:43,460 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;@5e1acc0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 16:15:43,460 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2022-10-15 16:15:43,477 INFO L276 IsEmpty]: Start isEmpty. Operand has 73 states, 42 states have (on average 1.880952380952381) internal successors, (79), 68 states have internal predecessors, (79), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 16:15:43,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 16:15:43,494 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:15:43,495 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 16:15:43,496 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [borErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-10-15 16:15:43,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:15:43,506 INFO L85 PathProgramCache]: Analyzing trace with hash 2403397, now seen corresponding path program 1 times [2022-10-15 16:15:43,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:15:43,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630235908] [2022-10-15 16:15:43,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:15:43,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:15:43,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:15:43,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:15:43,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:15:43,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630235908] [2022-10-15 16:15:43,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630235908] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:15:43,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:15:43,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 16:15:43,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050021815] [2022-10-15 16:15:43,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:15:43,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 16:15:43,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:15:43,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 16:15:43,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 16:15:43,839 INFO L87 Difference]: Start difference. First operand has 73 states, 42 states have (on average 1.880952380952381) internal successors, (79), 68 states have internal predecessors, (79), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:15:43,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:15:43,940 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2022-10-15 16:15:43,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 16:15:43,943 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-15 16:15:43,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:15:43,954 INFO L225 Difference]: With dead ends: 64 [2022-10-15 16:15:43,954 INFO L226 Difference]: Without dead ends: 62 [2022-10-15 16:15:43,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 16:15:43,961 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 34 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:15:43,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 73 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:15:43,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-10-15 16:15:44,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-10-15 16:15:44,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 41 states have (on average 1.5609756097560976) internal successors, (64), 57 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 16:15:44,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2022-10-15 16:15:44,022 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 4 [2022-10-15 16:15:44,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:15:44,023 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2022-10-15 16:15:44,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:15:44,024 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2022-10-15 16:15:44,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 16:15:44,025 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:15:44,025 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 16:15:44,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 16:15:44,026 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [borErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-10-15 16:15:44,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:15:44,028 INFO L85 PathProgramCache]: Analyzing trace with hash 2403398, now seen corresponding path program 1 times [2022-10-15 16:15:44,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:15:44,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101104135] [2022-10-15 16:15:44,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:15:44,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:15:44,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:15:44,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:15:44,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:15:44,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101104135] [2022-10-15 16:15:44,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101104135] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:15:44,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:15:44,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 16:15:44,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97186568] [2022-10-15 16:15:44,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:15:44,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 16:15:44,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:15:44,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 16:15:44,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 16:15:44,259 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:15:44,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:15:44,349 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2022-10-15 16:15:44,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 16:15:44,351 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-15 16:15:44,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:15:44,352 INFO L225 Difference]: With dead ends: 66 [2022-10-15 16:15:44,355 INFO L226 Difference]: Without dead ends: 66 [2022-10-15 16:15:44,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 16:15:44,357 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 2 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:15:44,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 104 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:15:44,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-10-15 16:15:44,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-10-15 16:15:44,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 43 states have (on average 1.5348837209302326) internal successors, (66), 59 states have internal predecessors, (66), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 16:15:44,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2022-10-15 16:15:44,384 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 4 [2022-10-15 16:15:44,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:15:44,384 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2022-10-15 16:15:44,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:15:44,385 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2022-10-15 16:15:44,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-15 16:15:44,386 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:15:44,386 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-10-15 16:15:44,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 16:15:44,387 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [borErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-10-15 16:15:44,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:15:44,388 INFO L85 PathProgramCache]: Analyzing trace with hash -909504311, now seen corresponding path program 1 times [2022-10-15 16:15:44,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:15:44,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036773695] [2022-10-15 16:15:44,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:15:44,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:15:44,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:15:44,573 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 16:15:44,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:15:44,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036773695] [2022-10-15 16:15:44,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036773695] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:15:44,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072599347] [2022-10-15 16:15:44,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:15:44,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:15:44,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:15:44,591 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:15:44,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-15 16:15:44,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:15:44,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-15 16:15:44,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:15:44,789 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 16:15:44,852 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 16:15:44,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:15:44,949 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 16:15:44,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072599347] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:15:44,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:15:44,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-10-15 16:15:44,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748713754] [2022-10-15 16:15:44,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:15:44,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-15 16:15:44,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:15:44,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-15 16:15:44,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-10-15 16:15:44,958 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:15:45,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:15:45,324 INFO L93 Difference]: Finished difference Result 140 states and 158 transitions. [2022-10-15 16:15:45,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 16:15:45,325 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-10-15 16:15:45,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:15:45,327 INFO L225 Difference]: With dead ends: 140 [2022-10-15 16:15:45,327 INFO L226 Difference]: Without dead ends: 140 [2022-10-15 16:15:45,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-10-15 16:15:45,332 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 98 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 16:15:45,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 200 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 16:15:45,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-10-15 16:15:45,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 76. [2022-10-15 16:15:45,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 55 states have (on average 1.4545454545454546) internal successors, (80), 71 states have internal predecessors, (80), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 16:15:45,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2022-10-15 16:15:45,363 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 8 [2022-10-15 16:15:45,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:15:45,363 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2022-10-15 16:15:45,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:15:45,364 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2022-10-15 16:15:45,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-10-15 16:15:45,364 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:15:45,364 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-15 16:15:45,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-15 16:15:45,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:15:45,581 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting borErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [borErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-10-15 16:15:45,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:15:45,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1167864941, now seen corresponding path program 1 times [2022-10-15 16:15:45,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:15:45,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297827115] [2022-10-15 16:15:45,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:15:45,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:15:45,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:15:45,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-15 16:15:45,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:15:45,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297827115] [2022-10-15 16:15:45,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297827115] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:15:45,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:15:45,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-15 16:15:45,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945853188] [2022-10-15 16:15:45,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:15:45,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-15 16:15:45,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:15:45,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-15 16:15:45,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-15 16:15:45,750 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 16:15:45,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:15:45,849 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2022-10-15 16:15:45,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-15 16:15:45,850 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 14 [2022-10-15 16:15:45,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:15:45,851 INFO L225 Difference]: With dead ends: 73 [2022-10-15 16:15:45,851 INFO L226 Difference]: Without dead ends: 73 [2022-10-15 16:15:45,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-15 16:15:45,854 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 73 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:15:45,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 87 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:15:45,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-10-15 16:15:45,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-10-15 16:15:45,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 55 states have (on average 1.4) internal successors, (77), 68 states have internal predecessors, (77), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 16:15:45,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2022-10-15 16:15:45,863 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 14 [2022-10-15 16:15:45,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:15:45,863 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2022-10-15 16:15:45,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 16:15:45,864 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2022-10-15 16:15:45,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-10-15 16:15:45,864 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:15:45,865 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-15 16:15:45,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-15 16:15:45,865 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting borErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [borErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-10-15 16:15:45,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:15:45,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1167864940, now seen corresponding path program 1 times [2022-10-15 16:15:45,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:15:45,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241657674] [2022-10-15 16:15:45,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:15:45,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:15:45,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:15:45,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:15:45,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:15:45,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241657674] [2022-10-15 16:15:45,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241657674] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:15:45,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80501934] [2022-10-15 16:15:45,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:15:45,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:15:45,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:15:45,941 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:15:45,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-15 16:15:45,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:15:46,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-15 16:15:46,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:15:46,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:15:46,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:15:46,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:15:46,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80501934] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:15:46,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:15:46,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-10-15 16:15:46,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376729934] [2022-10-15 16:15:46,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:15:46,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-15 16:15:46,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:15:46,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-15 16:15:46,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-10-15 16:15:46,075 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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 16:15:46,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:15:46,118 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2022-10-15 16:15:46,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-15 16:15:46,119 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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 14 [2022-10-15 16:15:46,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:15:46,120 INFO L225 Difference]: With dead ends: 81 [2022-10-15 16:15:46,121 INFO L226 Difference]: Without dead ends: 81 [2022-10-15 16:15:46,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-10-15 16:15:46,122 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 30 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 16:15:46,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 189 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 16:15:46,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-10-15 16:15:46,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2022-10-15 16:15:46,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.3387096774193548) internal successors, (83), 75 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 16:15:46,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2022-10-15 16:15:46,131 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 14 [2022-10-15 16:15:46,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:15:46,132 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2022-10-15 16:15:46,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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 16:15:46,132 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2022-10-15 16:15:46,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-15 16:15:46,133 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:15:46,133 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1] [2022-10-15 16:15:46,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-15 16:15:46,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:15:46,347 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [borErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-10-15 16:15:46,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:15:46,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1712678226, now seen corresponding path program 2 times [2022-10-15 16:15:46,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:15:46,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723166962] [2022-10-15 16:15:46,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:15:46,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:15:46,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:15:46,642 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:15:46,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:15:46,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723166962] [2022-10-15 16:15:46,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723166962] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:15:46,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685203531] [2022-10-15 16:15:46,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 16:15:46,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:15:46,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:15:46,644 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:15:46,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-15 16:15:46,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 16:15:46,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:15:46,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-15 16:15:46,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:15:46,732 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 16:15:47,017 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:15:47,018 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 16:15:47,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685203531] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:15:47,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 16:15:47,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2022-10-15 16:15:47,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374011285] [2022-10-15 16:15:47,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:15:47,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-15 16:15:47,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:15:47,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-15 16:15:47,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-10-15 16:15:47,022 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:15:47,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:15:47,134 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2022-10-15 16:15:47,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-15 16:15:47,136 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 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 20 [2022-10-15 16:15:47,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:15:47,139 INFO L225 Difference]: With dead ends: 73 [2022-10-15 16:15:47,140 INFO L226 Difference]: Without dead ends: 73 [2022-10-15 16:15:47,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-10-15 16:15:47,145 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 77 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:15:47,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 86 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:15:47,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-10-15 16:15:47,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-10-15 16:15:47,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 68 states have internal predecessors, (75), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 16:15:47,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2022-10-15 16:15:47,167 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 20 [2022-10-15 16:15:47,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:15:47,168 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2022-10-15 16:15:47,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:15:47,168 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2022-10-15 16:15:47,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-10-15 16:15:47,174 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:15:47,174 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2022-10-15 16:15:47,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-15 16:15:47,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:15:47,375 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting borErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [borErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-10-15 16:15:47,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:15:47,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1271290464, now seen corresponding path program 2 times [2022-10-15 16:15:47,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:15:47,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756469147] [2022-10-15 16:15:47,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:15:47,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:15:47,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:15:47,512 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:15:47,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:15:47,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756469147] [2022-10-15 16:15:47,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756469147] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:15:47,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447793516] [2022-10-15 16:15:47,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 16:15:47,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:15:47,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:15:47,514 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:15:47,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-15 16:15:47,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 16:15:47,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:15:47,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-15 16:15:47,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:15:47,586 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 16:15:47,759 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-10-15 16:15:47,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 16:15:47,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447793516] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:15:47,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 16:15:47,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 12 [2022-10-15 16:15:47,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732203101] [2022-10-15 16:15:47,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:15:47,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-15 16:15:47,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:15:47,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-15 16:15:47,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-10-15 16:15:47,763 INFO L87 Difference]: Start difference. First operand 73 states and 81 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 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 16:15:47,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:15:47,857 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2022-10-15 16:15:47,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-15 16:15:47,857 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 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 30 [2022-10-15 16:15:47,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:15:47,858 INFO L225 Difference]: With dead ends: 72 [2022-10-15 16:15:47,859 INFO L226 Difference]: Without dead ends: 72 [2022-10-15 16:15:47,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-10-15 16:15:47,860 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 64 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:15:47,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 90 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:15:47,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-10-15 16:15:47,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-10-15 16:15:47,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 67 states have internal predecessors, (74), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 16:15:47,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2022-10-15 16:15:47,867 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 30 [2022-10-15 16:15:47,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:15:47,868 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2022-10-15 16:15:47,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 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 16:15:47,868 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2022-10-15 16:15:47,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-10-15 16:15:47,869 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:15:47,869 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:15:47,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-15 16:15:48,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:15:48,083 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting borErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [borErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-10-15 16:15:48,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:15:48,084 INFO L85 PathProgramCache]: Analyzing trace with hash 7347753, now seen corresponding path program 1 times [2022-10-15 16:15:48,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:15:48,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908729521] [2022-10-15 16:15:48,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:15:48,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:15:48,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:15:48,217 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:15:48,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:15:48,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908729521] [2022-10-15 16:15:48,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908729521] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:15:48,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94723433] [2022-10-15 16:15:48,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:15:48,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:15:48,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:15:48,219 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:15:48,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-15 16:15:48,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:15:48,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-15 16:15:48,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:15:48,360 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:15:48,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:15:48,504 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:15:48,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94723433] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:15:48,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:15:48,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-10-15 16:15:48,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714652526] [2022-10-15 16:15:48,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:15:48,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-15 16:15:48,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:15:48,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-15 16:15:48,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-15 16:15:48,508 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 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 16:15:48,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:15:48,586 INFO L93 Difference]: Finished difference Result 104 states and 112 transitions. [2022-10-15 16:15:48,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-15 16:15:48,586 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 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 33 [2022-10-15 16:15:48,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:15:48,587 INFO L225 Difference]: With dead ends: 104 [2022-10-15 16:15:48,588 INFO L226 Difference]: Without dead ends: 104 [2022-10-15 16:15:48,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-15 16:15:48,589 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 63 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:15:48,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 123 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:15:48,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-10-15 16:15:48,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-10-15 16:15:48,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 94 states have (on average 1.127659574468085) internal successors, (106), 99 states have internal predecessors, (106), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 16:15:48,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2022-10-15 16:15:48,597 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 33 [2022-10-15 16:15:48,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:15:48,597 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2022-10-15 16:15:48,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 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 16:15:48,598 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2022-10-15 16:15:48,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-10-15 16:15:48,600 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:15:48,600 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:15:48,640 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 16:15:48,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:15:48,814 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting borErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [borErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-10-15 16:15:48,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:15:48,815 INFO L85 PathProgramCache]: Analyzing trace with hash 127965969, now seen corresponding path program 2 times [2022-10-15 16:15:48,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:15:48,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377157926] [2022-10-15 16:15:48,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:15:48,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:15:48,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:15:49,212 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:15:49,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:15:49,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377157926] [2022-10-15 16:15:49,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377157926] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:15:49,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550564121] [2022-10-15 16:15:49,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 16:15:49,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:15:49,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:15:49,215 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:15:49,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-15 16:15:49,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 16:15:49,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:15:49,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-15 16:15:49,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:15:49,290 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 16:15:49,611 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-10-15 16:15:49,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 16:15:49,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550564121] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:15:49,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 16:15:49,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [17] total 22 [2022-10-15 16:15:49,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455129497] [2022-10-15 16:15:49,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:15:49,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-15 16:15:49,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:15:49,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-15 16:15:49,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2022-10-15 16:15:49,614 INFO L87 Difference]: Start difference. First operand 104 states and 112 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:15:49,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:15:49,764 INFO L93 Difference]: Finished difference Result 113 states and 125 transitions. [2022-10-15 16:15:49,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-15 16:15:49,764 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-10-15 16:15:49,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:15:49,766 INFO L225 Difference]: With dead ends: 113 [2022-10-15 16:15:49,766 INFO L226 Difference]: Without dead ends: 113 [2022-10-15 16:15:49,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2022-10-15 16:15:49,767 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 99 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:15:49,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 115 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:15:49,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-10-15 16:15:49,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 107. [2022-10-15 16:15:49,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 97 states have (on average 1.1237113402061856) internal successors, (109), 102 states have internal predecessors, (109), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 16:15:49,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 115 transitions. [2022-10-15 16:15:49,774 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 115 transitions. Word has length 65 [2022-10-15 16:15:49,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:15:49,775 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 115 transitions. [2022-10-15 16:15:49,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:15:49,775 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 115 transitions. [2022-10-15 16:15:49,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-10-15 16:15:49,777 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:15:49,777 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:15:49,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-15 16:15:49,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:15:49,991 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting borErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [borErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-10-15 16:15:49,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:15:49,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1803950425, now seen corresponding path program 1 times [2022-10-15 16:15:49,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:15:49,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528025493] [2022-10-15 16:15:49,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:15:49,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:15:50,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:15:50,471 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 16:15:50,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:15:50,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528025493] [2022-10-15 16:15:50,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528025493] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:15:50,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952076095] [2022-10-15 16:15:50,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:15:50,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:15:50,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:15:50,476 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:15:50,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-15 16:15:50,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:15:50,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-15 16:15:50,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:15:50,698 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 16:15:50,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:15:51,111 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 16:15:51,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952076095] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:15:51,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:15:51,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-10-15 16:15:51,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022242252] [2022-10-15 16:15:51,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:15:51,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-10-15 16:15:51,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:15:51,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-10-15 16:15:51,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-10-15 16:15:51,115 INFO L87 Difference]: Start difference. First operand 107 states and 115 transitions. Second operand has 33 states, 33 states have (on average 4.0) internal successors, (132), 33 states have internal predecessors, (132), 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 16:15:51,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:15:51,260 INFO L93 Difference]: Finished difference Result 171 states and 179 transitions. [2022-10-15 16:15:51,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-10-15 16:15:51,261 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.0) internal successors, (132), 33 states have internal predecessors, (132), 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 71 [2022-10-15 16:15:51,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:15:51,263 INFO L225 Difference]: With dead ends: 171 [2022-10-15 16:15:51,263 INFO L226 Difference]: Without dead ends: 171 [2022-10-15 16:15:51,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-10-15 16:15:51,265 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 90 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:15:51,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 351 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:15:51,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-10-15 16:15:51,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-10-15 16:15:51,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 161 states have (on average 1.0745341614906831) internal successors, (173), 166 states have internal predecessors, (173), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 16:15:51,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 179 transitions. [2022-10-15 16:15:51,272 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 179 transitions. Word has length 71 [2022-10-15 16:15:51,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:15:51,273 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 179 transitions. [2022-10-15 16:15:51,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.0) internal successors, (132), 33 states have internal predecessors, (132), 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 16:15:51,273 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 179 transitions. [2022-10-15 16:15:51,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-10-15 16:15:51,276 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:15:51,276 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:15:51,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-15 16:15:51,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:15:51,492 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting borErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [borErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-10-15 16:15:51,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:15:51,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1661495511, now seen corresponding path program 2 times [2022-10-15 16:15:51,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:15:51,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097532894] [2022-10-15 16:15:51,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:15:51,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:15:51,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:15:53,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 16:15:53,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:15:53,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097532894] [2022-10-15 16:15:53,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097532894] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:15:53,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017439983] [2022-10-15 16:15:53,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 16:15:53,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:15:53,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:15:53,047 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:15:53,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-15 16:15:53,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 16:15:53,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:15:53,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 32 conjunts are in the unsatisfiable core [2022-10-15 16:15:53,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:15:53,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 16:15:53,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:15:54,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 16:15:54,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017439983] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:15:54,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:15:54,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2022-10-15 16:15:54,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919765567] [2022-10-15 16:15:54,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:15:54,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-10-15 16:15:54,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:15:54,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-10-15 16:15:54,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-10-15 16:15:54,814 INFO L87 Difference]: Start difference. First operand 171 states and 179 transitions. Second operand has 65 states, 65 states have (on average 4.0) internal successors, (260), 65 states have internal predecessors, (260), 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 16:15:55,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:15:55,144 INFO L93 Difference]: Finished difference Result 299 states and 307 transitions. [2022-10-15 16:15:55,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-10-15 16:15:55,145 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 4.0) internal successors, (260), 65 states have internal predecessors, (260), 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 135 [2022-10-15 16:15:55,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:15:55,148 INFO L225 Difference]: With dead ends: 299 [2022-10-15 16:15:55,149 INFO L226 Difference]: Without dead ends: 299 [2022-10-15 16:15:55,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-10-15 16:15:55,153 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 279 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 16:15:55,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 382 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 16:15:55,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-10-15 16:15:55,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2022-10-15 16:15:55,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 289 states have (on average 1.041522491349481) internal successors, (301), 294 states have internal predecessors, (301), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 16:15:55,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 307 transitions. [2022-10-15 16:15:55,163 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 307 transitions. Word has length 135 [2022-10-15 16:15:55,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:15:55,164 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 307 transitions. [2022-10-15 16:15:55,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 4.0) internal successors, (260), 65 states have internal predecessors, (260), 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 16:15:55,165 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 307 transitions. [2022-10-15 16:15:55,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-10-15 16:15:55,181 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:15:55,181 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 62, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:15:55,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-15 16:15:55,396 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,SelfDestructingSolverStorable10 [2022-10-15 16:15:55,397 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting borErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [borErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-10-15 16:15:55,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:15:55,399 INFO L85 PathProgramCache]: Analyzing trace with hash -682159415, now seen corresponding path program 3 times [2022-10-15 16:15:55,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:15:55,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229902624] [2022-10-15 16:15:55,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:15:55,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:15:55,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:16:00,416 INFO L134 CoverageAnalysis]: Checked inductivity of 7628 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 16:16:00,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:16:00,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229902624] [2022-10-15 16:16:00,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229902624] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:16:00,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092820706] [2022-10-15 16:16:00,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 16:16:00,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:16:00,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:16:00,419 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:16:00,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-15 16:16:00,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-15 16:16:00,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:16:00,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjunts are in the unsatisfiable core [2022-10-15 16:16:00,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:16:00,962 INFO L134 CoverageAnalysis]: Checked inductivity of 7628 backedges. 184 proven. 2 refuted. 0 times theorem prover too weak. 7442 trivial. 0 not checked. [2022-10-15 16:16:00,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:16:01,533 INFO L134 CoverageAnalysis]: Checked inductivity of 7628 backedges. 184 proven. 2 refuted. 0 times theorem prover too weak. 7442 trivial. 0 not checked. [2022-10-15 16:16:01,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092820706] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:16:01,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:16:01,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 9, 9] total 81 [2022-10-15 16:16:01,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514489662] [2022-10-15 16:16:01,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:16:01,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-10-15 16:16:01,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:16:01,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-10-15 16:16:01,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2267, Invalid=4213, Unknown=0, NotChecked=0, Total=6480 [2022-10-15 16:16:01,541 INFO L87 Difference]: Start difference. First operand 299 states and 307 transitions. Second operand has 81 states, 79 states have (on average 3.7468354430379747) internal successors, (296), 79 states have internal predecessors, (296), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:16:06,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:16:06,248 INFO L93 Difference]: Finished difference Result 364 states and 401 transitions. [2022-10-15 16:16:06,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-10-15 16:16:06,249 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 79 states have (on average 3.7468354430379747) internal successors, (296), 79 states have internal predecessors, (296), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 263 [2022-10-15 16:16:06,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:16:06,254 INFO L225 Difference]: With dead ends: 364 [2022-10-15 16:16:06,254 INFO L226 Difference]: Without dead ends: 364 [2022-10-15 16:16:06,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 662 GetRequests, 512 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3607 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=6951, Invalid=16001, Unknown=0, NotChecked=0, Total=22952 [2022-10-15 16:16:06,263 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 1070 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1070 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-15 16:16:06,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1070 Valid, 467 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-15 16:16:06,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-10-15 16:16:06,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 328. [2022-10-15 16:16:06,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 319 states have (on average 1.078369905956113) internal successors, (344), 323 states have internal predecessors, (344), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 16:16:06,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 350 transitions. [2022-10-15 16:16:06,275 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 350 transitions. Word has length 263 [2022-10-15 16:16:06,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:16:06,276 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 350 transitions. [2022-10-15 16:16:06,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 79 states have (on average 3.7468354430379747) internal successors, (296), 79 states have internal predecessors, (296), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:16:06,277 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 350 transitions. [2022-10-15 16:16:06,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2022-10-15 16:16:06,281 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:16:06,281 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 63, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:16:06,311 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 16:16:06,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:16:06,495 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting borErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [borErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-10-15 16:16:06,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:16:06,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1689319170, now seen corresponding path program 4 times [2022-10-15 16:16:06,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:16:06,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212027551] [2022-10-15 16:16:06,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:16:06,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:16:06,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:16:10,900 INFO L134 CoverageAnalysis]: Checked inductivity of 7919 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-10-15 16:16:10,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:16:10,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212027551] [2022-10-15 16:16:10,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212027551] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:16:10,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966444845] [2022-10-15 16:16:10,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-15 16:16:10,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:16:10,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:16:10,903 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:16:10,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-15 16:16:27,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-15 16:16:27,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:16:27,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 65 conjunts are in the unsatisfiable core [2022-10-15 16:16:27,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:16:27,649 INFO L134 CoverageAnalysis]: Checked inductivity of 7919 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-10-15 16:16:27,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:16:33,421 INFO L134 CoverageAnalysis]: Checked inductivity of 7919 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-10-15 16:16:33,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966444845] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:16:33,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:16:33,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 131 [2022-10-15 16:16:33,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488518117] [2022-10-15 16:16:33,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:16:33,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-10-15 16:16:33,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:16:33,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-10-15 16:16:33,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2022-10-15 16:16:33,431 INFO L87 Difference]: Start difference. First operand 328 states and 350 transitions. Second operand has 131 states, 131 states have (on average 4.0) internal successors, (524), 131 states have internal predecessors, (524), 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 16:16:34,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:16:34,433 INFO L93 Difference]: Finished difference Result 588 states and 610 transitions. [2022-10-15 16:16:34,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-10-15 16:16:34,438 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 4.0) internal successors, (524), 131 states have internal predecessors, (524), 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 285 [2022-10-15 16:16:34,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:16:34,442 INFO L225 Difference]: With dead ends: 588 [2022-10-15 16:16:34,442 INFO L226 Difference]: Without dead ends: 588 [2022-10-15 16:16:34,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 634 GetRequests, 505 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2022-10-15 16:16:34,447 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 384 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-15 16:16:34,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 599 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-15 16:16:34,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-10-15 16:16:34,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 588. [2022-10-15 16:16:34,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 579 states have (on average 1.0431778929188256) internal successors, (604), 583 states have internal predecessors, (604), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 16:16:34,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 610 transitions. [2022-10-15 16:16:34,462 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 610 transitions. Word has length 285 [2022-10-15 16:16:34,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:16:34,462 INFO L495 AbstractCegarLoop]: Abstraction has 588 states and 610 transitions. [2022-10-15 16:16:34,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 4.0) internal successors, (524), 131 states have internal predecessors, (524), 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 16:16:34,463 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 610 transitions. [2022-10-15 16:16:34,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2022-10-15 16:16:34,475 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:16:34,476 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 128, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:16:34,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-15 16:16:34,676 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,SelfDestructingSolverStorable12 [2022-10-15 16:16:34,677 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting borErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [borErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, borErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-10-15 16:16:34,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:16:34,678 INFO L85 PathProgramCache]: Analyzing trace with hash -968854245, now seen corresponding path program 5 times [2022-10-15 16:16:34,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:16:34,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043224725] [2022-10-15 16:16:34,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:16:34,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:16:35,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat