/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-cav19/array_init_pair_sum_const.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 23:50:20,029 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 23:50:20,033 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 23:50:20,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-10-15 23:50:20,103 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 23:50:20,104 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 23:50:20,106 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 23:50:20,107 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 23:50:20,109 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 23:50:20,110 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 23:50:20,112 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 23:50:20,115 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 23:50:20,117 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 23:50:20,119 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 23:50:20,120 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 23:50:20,122 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 23:50:20,127 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-15 23:50:20,147 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 23:50:20,148 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 23:50:20,149 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 23:50:20,151 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 23:50:20,210 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 23:50:20,210 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 23:50:20,211 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 23:50:20,211 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 23:50:20,214 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 23:50:20,214 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 23:50:20,217 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 23:50:20,217 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 23:50:20,217 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 23:50:20,218 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 23:50:20,219 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 23:50:20,219 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 23:50:20,219 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 23:50:20,220 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 23:50:20,220 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 23:50:20,220 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 23:50:20,220 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 23:50:20,220 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 23:50:20,221 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 23:50:20,221 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 23:50:20,221 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 23:50:20,221 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 23:50:20,221 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 23:50:20,222 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 23:50:20,222 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 23:50:20,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 23:50:20,222 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 23:50:20,223 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 23:50:20,223 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 23:50:20,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 23:50:20,224 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 23:50:20,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 23:50:20,742 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 23:50:20,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 23:50:20,749 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 23:50:20,749 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 23:50:20,751 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_init_pair_sum_const.c [2022-10-15 23:50:20,847 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/856a3fc8c/1a0e2202c5244123b1b8deb42654cafa/FLAG0560a5dcc [2022-10-15 23:50:21,540 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 23:50:21,541 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_pair_sum_const.c [2022-10-15 23:50:21,550 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/856a3fc8c/1a0e2202c5244123b1b8deb42654cafa/FLAG0560a5dcc [2022-10-15 23:50:21,899 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/856a3fc8c/1a0e2202c5244123b1b8deb42654cafa [2022-10-15 23:50:21,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 23:50:21,913 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 23:50:21,917 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 23:50:21,918 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 23:50:21,924 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 23:50:21,926 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 11:50:21" (1/1) ... [2022-10-15 23:50:21,928 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@204c543f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:50:21, skipping insertion in model container [2022-10-15 23:50:21,928 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 11:50:21" (1/1) ... [2022-10-15 23:50:21,940 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 23:50:21,959 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 23:50:22,158 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_pair_sum_const.c[416,429] [2022-10-15 23:50:22,189 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 23:50:22,205 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 23:50:22,232 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_pair_sum_const.c[416,429] [2022-10-15 23:50:22,260 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 23:50:22,283 INFO L208 MainTranslator]: Completed translation [2022-10-15 23:50:22,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:50:22 WrapperNode [2022-10-15 23:50:22,287 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 23:50:22,293 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 23:50:22,294 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 23:50:22,295 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 23:50:22,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:50:22" (1/1) ... [2022-10-15 23:50:22,329 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:50:22" (1/1) ... [2022-10-15 23:50:22,367 INFO L138 Inliner]: procedures = 14, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2022-10-15 23:50:22,368 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 23:50:22,370 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 23:50:22,371 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 23:50:22,371 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 23:50:22,387 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:50:22" (1/1) ... [2022-10-15 23:50:22,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:50:22" (1/1) ... [2022-10-15 23:50:22,394 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:50:22" (1/1) ... [2022-10-15 23:50:22,395 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:50:22" (1/1) ... [2022-10-15 23:50:22,418 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:50:22" (1/1) ... [2022-10-15 23:50:22,425 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:50:22" (1/1) ... [2022-10-15 23:50:22,434 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:50:22" (1/1) ... [2022-10-15 23:50:22,442 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:50:22" (1/1) ... [2022-10-15 23:50:22,447 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 23:50:22,449 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 23:50:22,449 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 23:50:22,449 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 23:50:22,451 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:50:22" (1/1) ... [2022-10-15 23:50:22,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 23:50:22,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 23:50:22,498 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 23:50:22,534 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 23:50:22,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 23:50:22,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 23:50:22,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 23:50:22,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 23:50:22,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 23:50:22,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 23:50:22,638 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 23:50:22,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 23:50:22,756 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 23:50:22,760 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 23:50:23,035 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 23:50:23,044 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 23:50:23,044 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-10-15 23:50:23,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 11:50:23 BoogieIcfgContainer [2022-10-15 23:50:23,047 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 23:50:23,051 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 23:50:23,051 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 23:50:23,056 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 23:50:23,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 11:50:21" (1/3) ... [2022-10-15 23:50:23,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@191b60e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 11:50:23, skipping insertion in model container [2022-10-15 23:50:23,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:50:22" (2/3) ... [2022-10-15 23:50:23,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@191b60e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 11:50:23, skipping insertion in model container [2022-10-15 23:50:23,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 11:50:23" (3/3) ... [2022-10-15 23:50:23,060 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_pair_sum_const.c [2022-10-15 23:50:23,101 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 23:50:23,101 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2022-10-15 23:50:23,203 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 23:50:23,213 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;@48b4420b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 23:50:23,213 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2022-10-15 23:50:23,219 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 24 states have (on average 1.875) internal successors, (45), 38 states have internal predecessors, (45), 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 23:50:23,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 23:50:23,229 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:50:23,230 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 23:50:23,231 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 23:50:23,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:50:23,239 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2022-10-15 23:50:23,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:50:23,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993962158] [2022-10-15 23:50:23,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:23,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:50:23,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:23,942 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 23:50:23,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:50:23,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993962158] [2022-10-15 23:50:23,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993962158] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 23:50:23,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 23:50:23,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 23:50:23,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252235443] [2022-10-15 23:50:23,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 23:50:23,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 23:50:23,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 23:50:23,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 23:50:23,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 23:50:23,998 INFO L87 Difference]: Start difference. First operand has 39 states, 24 states have (on average 1.875) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:24,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 23:50:24,068 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2022-10-15 23:50:24,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 23:50:24,071 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 23:50:24,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 23:50:24,082 INFO L225 Difference]: With dead ends: 37 [2022-10-15 23:50:24,082 INFO L226 Difference]: Without dead ends: 35 [2022-10-15 23:50:24,085 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 23:50:24,090 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 32 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 23:50:24,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 27 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 23:50:24,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-10-15 23:50:24,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-10-15 23:50:24,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.608695652173913) internal successors, (37), 34 states have internal predecessors, (37), 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 23:50:24,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2022-10-15 23:50:24,142 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 4 [2022-10-15 23:50:24,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 23:50:24,143 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2022-10-15 23:50:24,143 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 23:50:24,144 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2022-10-15 23:50:24,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 23:50:24,144 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:50:24,144 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 23:50:24,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 23:50:24,145 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 23:50:24,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:50:24,147 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2022-10-15 23:50:24,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:50:24,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465479228] [2022-10-15 23:50:24,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:24,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:50:24,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:24,511 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 23:50:24,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:50:24,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465479228] [2022-10-15 23:50:24,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465479228] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 23:50:24,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 23:50:24,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-15 23:50:24,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097416152] [2022-10-15 23:50:24,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 23:50:24,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 23:50:24,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 23:50:24,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 23:50:24,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 23:50:24,518 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 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 23:50:24,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 23:50:24,619 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2022-10-15 23:50:24,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 23:50:24,620 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 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 23:50:24,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 23:50:24,621 INFO L225 Difference]: With dead ends: 53 [2022-10-15 23:50:24,621 INFO L226 Difference]: Without dead ends: 53 [2022-10-15 23:50:24,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 23:50:24,624 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 31 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 23:50:24,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 34 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 23:50:24,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-10-15 23:50:24,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 40. [2022-10-15 23:50:24,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:24,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2022-10-15 23:50:24,635 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 4 [2022-10-15 23:50:24,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 23:50:24,636 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2022-10-15 23:50:24,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 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 23:50:24,636 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2022-10-15 23:50:24,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-10-15 23:50:24,637 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:50:24,637 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-10-15 23:50:24,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 23:50:24,638 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 23:50:24,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:50:24,640 INFO L85 PathProgramCache]: Analyzing trace with hash 28698700, now seen corresponding path program 1 times [2022-10-15 23:50:24,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:50:24,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065949732] [2022-10-15 23:50:24,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:24,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:50:24,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:24,822 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 23:50:24,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:50:24,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065949732] [2022-10-15 23:50:24,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065949732] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 23:50:24,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 23:50:24,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-15 23:50:24,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389695802] [2022-10-15 23:50:24,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 23:50:24,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 23:50:24,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 23:50:24,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 23:50:24,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 23:50:24,827 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:24,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 23:50:24,920 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2022-10-15 23:50:24,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 23:50:24,921 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-10-15 23:50:24,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 23:50:24,923 INFO L225 Difference]: With dead ends: 40 [2022-10-15 23:50:24,923 INFO L226 Difference]: Without dead ends: 40 [2022-10-15 23:50:24,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 23:50:24,926 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 4 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 23:50:24,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 50 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 23:50:24,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-10-15 23:50:24,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2022-10-15 23:50:24,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 37 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:24,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2022-10-15 23:50:24,935 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 5 [2022-10-15 23:50:24,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 23:50:24,935 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2022-10-15 23:50:24,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:24,936 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2022-10-15 23:50:24,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-10-15 23:50:24,936 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:50:24,937 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-10-15 23:50:24,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-15 23:50:24,937 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 23:50:24,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:50:24,950 INFO L85 PathProgramCache]: Analyzing trace with hash 28698699, now seen corresponding path program 1 times [2022-10-15 23:50:24,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:50:24,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994029233] [2022-10-15 23:50:24,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:24,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:50:24,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:25,073 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 23:50:25,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:50:25,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994029233] [2022-10-15 23:50:25,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994029233] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 23:50:25,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 23:50:25,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 23:50:25,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553988211] [2022-10-15 23:50:25,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 23:50:25,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 23:50:25,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 23:50:25,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 23:50:25,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 23:50:25,077 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:25,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 23:50:25,105 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2022-10-15 23:50:25,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 23:50:25,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-10-15 23:50:25,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 23:50:25,107 INFO L225 Difference]: With dead ends: 36 [2022-10-15 23:50:25,107 INFO L226 Difference]: Without dead ends: 36 [2022-10-15 23:50:25,107 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 23:50:25,109 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 23:50:25,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 24 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 23:50:25,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-10-15 23:50:25,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-10-15 23:50:25,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 35 states have internal predecessors, (38), 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 23:50:25,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-10-15 23:50:25,118 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 5 [2022-10-15 23:50:25,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 23:50:25,119 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-10-15 23:50:25,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:25,119 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-10-15 23:50:25,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-15 23:50:25,120 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:50:25,120 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-10-15 23:50:25,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-15 23:50:25,121 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 23:50:25,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:50:25,122 INFO L85 PathProgramCache]: Analyzing trace with hash 264437835, now seen corresponding path program 1 times [2022-10-15 23:50:25,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:50:25,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653932406] [2022-10-15 23:50:25,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:25,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:50:25,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:25,504 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 23:50:25,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:50:25,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653932406] [2022-10-15 23:50:25,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653932406] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 23:50:25,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009371351] [2022-10-15 23:50:25,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:25,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 23:50:25,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 23:50:25,515 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 23:50:25,535 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 23:50:25,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:25,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjunts are in the unsatisfiable core [2022-10-15 23:50:25,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 23:50:25,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 23:50:25,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 23:50:25,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 23:50:25,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-10-15 23:50:25,748 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-15 23:50:25,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-10-15 23:50:25,827 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 23:50:25,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 23:50:25,946 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 23:50:25,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009371351] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 23:50:25,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 23:50:25,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2022-10-15 23:50:25,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992043641] [2022-10-15 23:50:25,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 23:50:25,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-15 23:50:25,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 23:50:25,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-15 23:50:25,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-10-15 23:50:25,951 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:26,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 23:50:26,366 INFO L93 Difference]: Finished difference Result 138 states and 151 transitions. [2022-10-15 23:50:26,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-15 23:50:26,367 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-10-15 23:50:26,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 23:50:26,371 INFO L225 Difference]: With dead ends: 138 [2022-10-15 23:50:26,371 INFO L226 Difference]: Without dead ends: 138 [2022-10-15 23:50:26,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-10-15 23:50:26,373 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 127 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 23:50:26,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 86 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 23:50:26,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-10-15 23:50:26,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 69. [2022-10-15 23:50:26,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 59 states have (on average 1.5084745762711864) internal successors, (89), 68 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:26,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 89 transitions. [2022-10-15 23:50:26,391 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 89 transitions. Word has length 8 [2022-10-15 23:50:26,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 23:50:26,392 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 89 transitions. [2022-10-15 23:50:26,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:26,393 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 89 transitions. [2022-10-15 23:50:26,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-15 23:50:26,394 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:50:26,394 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2022-10-15 23:50:26,443 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 23:50:26,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 23:50:26,609 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 23:50:26,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:50:26,611 INFO L85 PathProgramCache]: Analyzing trace with hash -392361753, now seen corresponding path program 1 times [2022-10-15 23:50:26,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:50:26,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683982271] [2022-10-15 23:50:26,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:26,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:50:26,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:26,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 23:50:26,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:50:26,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683982271] [2022-10-15 23:50:26,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683982271] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 23:50:26,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601359321] [2022-10-15 23:50:26,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:26,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 23:50:26,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 23:50:26,826 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 23:50:26,834 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 23:50:26,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:26,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-15 23:50:26,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 23:50:26,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 23:50:26,961 INFO L356 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-10-15 23:50:26,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2022-10-15 23:50:26,978 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2022-10-15 23:50:27,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 23:50:27,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 23:50:27,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 23:50:27,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601359321] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 23:50:27,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 23:50:27,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2022-10-15 23:50:27,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396223541] [2022-10-15 23:50:27,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 23:50:27,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-15 23:50:27,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 23:50:27,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-15 23:50:27,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-10-15 23:50:27,193 INFO L87 Difference]: Start difference. First operand 69 states and 89 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 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 23:50:27,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 23:50:27,359 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2022-10-15 23:50:27,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 23:50:27,360 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 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 9 [2022-10-15 23:50:27,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 23:50:27,361 INFO L225 Difference]: With dead ends: 58 [2022-10-15 23:50:27,361 INFO L226 Difference]: Without dead ends: 58 [2022-10-15 23:50:27,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-10-15 23:50:27,363 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 14 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 23:50:27,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 52 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 23:50:27,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-10-15 23:50:27,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-10-15 23:50:27,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 56 states have internal predecessors, (66), 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 23:50:27,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2022-10-15 23:50:27,371 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 9 [2022-10-15 23:50:27,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 23:50:27,371 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2022-10-15 23:50:27,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 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 23:50:27,372 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2022-10-15 23:50:27,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-15 23:50:27,373 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:50:27,373 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 23:50:27,419 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 23:50:27,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-10-15 23:50:27,587 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 23:50:27,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:50:27,588 INFO L85 PathProgramCache]: Analyzing trace with hash -505645816, now seen corresponding path program 1 times [2022-10-15 23:50:27,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:50:27,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100801530] [2022-10-15 23:50:27,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:27,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:50:27,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:27,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 23:50:27,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:50:27,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100801530] [2022-10-15 23:50:27,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100801530] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 23:50:27,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481540129] [2022-10-15 23:50:27,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:27,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 23:50:27,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 23:50:27,731 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 23:50:27,736 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 23:50:27,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:27,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-15 23:50:27,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 23:50:27,874 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 23:50:27,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 23:50:27,929 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 23:50:27,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481540129] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 23:50:27,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 23:50:27,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2022-10-15 23:50:27,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835712973] [2022-10-15 23:50:27,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 23:50:27,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-15 23:50:27,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 23:50:27,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-15 23:50:27,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-10-15 23:50:27,952 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 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 23:50:28,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 23:50:28,201 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2022-10-15 23:50:28,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-15 23:50:28,202 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-10-15 23:50:28,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 23:50:28,203 INFO L225 Difference]: With dead ends: 66 [2022-10-15 23:50:28,203 INFO L226 Difference]: Without dead ends: 66 [2022-10-15 23:50:28,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2022-10-15 23:50:28,205 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 100 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 23:50:28,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 49 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 23:50:28,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-10-15 23:50:28,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2022-10-15 23:50:28,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 56 states have internal predecessors, (63), 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 23:50:28,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2022-10-15 23:50:28,212 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 15 [2022-10-15 23:50:28,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 23:50:28,212 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2022-10-15 23:50:28,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 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 23:50:28,213 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2022-10-15 23:50:28,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-15 23:50:28,214 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:50:28,214 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1] [2022-10-15 23:50:28,255 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 23:50:28,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 23:50:28,430 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 23:50:28,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:50:28,431 INFO L85 PathProgramCache]: Analyzing trace with hash -865246886, now seen corresponding path program 2 times [2022-10-15 23:50:28,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:50:28,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781587618] [2022-10-15 23:50:28,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:28,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:50:28,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:28,893 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 23:50:28,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:50:28,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781587618] [2022-10-15 23:50:28,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781587618] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 23:50:28,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242998788] [2022-10-15 23:50:28,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 23:50:28,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 23:50:28,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 23:50:28,900 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 23:50:28,908 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 23:50:28,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 23:50:28,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 23:50:28,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 18 conjunts are in the unsatisfiable core [2022-10-15 23:50:28,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 23:50:29,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 23:50:29,051 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-10-15 23:50:29,052 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 24 [2022-10-15 23:50:29,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-15 23:50:29,364 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 23:50:29,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 23:50:29,888 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 23:50:29,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242998788] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 23:50:29,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 23:50:29,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2022-10-15 23:50:29,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898892394] [2022-10-15 23:50:29,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 23:50:29,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-10-15 23:50:29,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 23:50:29,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-10-15 23:50:29,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2022-10-15 23:50:29,892 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 19 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 19 states have internal predecessors, (57), 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 23:50:30,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 23:50:30,645 INFO L93 Difference]: Finished difference Result 124 states and 134 transitions. [2022-10-15 23:50:30,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-15 23:50:30,646 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 19 states have internal predecessors, (57), 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 23:50:30,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 23:50:30,647 INFO L225 Difference]: With dead ends: 124 [2022-10-15 23:50:30,647 INFO L226 Difference]: Without dead ends: 124 [2022-10-15 23:50:30,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=213, Invalid=543, Unknown=0, NotChecked=0, Total=756 [2022-10-15 23:50:30,649 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 175 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-15 23:50:30,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 263 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-15 23:50:30,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-10-15 23:50:30,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 55. [2022-10-15 23:50:30,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 54 states have internal predecessors, (59), 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 23:50:30,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2022-10-15 23:50:30,657 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 20 [2022-10-15 23:50:30,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 23:50:30,658 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2022-10-15 23:50:30,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 19 states have internal predecessors, (57), 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 23:50:30,659 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2022-10-15 23:50:30,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-10-15 23:50:30,659 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:50:30,660 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1] [2022-10-15 23:50:30,715 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 23:50:30,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 23:50:30,874 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 23:50:30,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:50:30,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1052849736, now seen corresponding path program 2 times [2022-10-15 23:50:30,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:50:30,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194236305] [2022-10-15 23:50:30,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:30,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:50:30,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:31,265 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 23:50:31,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:50:31,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194236305] [2022-10-15 23:50:31,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194236305] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 23:50:31,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484861787] [2022-10-15 23:50:31,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 23:50:31,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 23:50:31,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 23:50:31,268 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 23:50:31,280 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 23:50:31,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 23:50:31,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 23:50:31,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-15 23:50:31,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 23:50:31,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 23:50:31,390 INFO L356 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-10-15 23:50:31,391 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2022-10-15 23:50:31,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 94 [2022-10-15 23:50:31,605 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-10-15 23:50:31,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 23:50:31,994 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-10-15 23:50:31,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484861787] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 23:50:31,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 23:50:31,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 12 [2022-10-15 23:50:31,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360054624] [2022-10-15 23:50:31,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 23:50:31,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-10-15 23:50:31,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 23:50:31,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-10-15 23:50:31,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-10-15 23:50:31,998 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 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 23:50:32,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 23:50:32,385 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2022-10-15 23:50:32,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-15 23:50:32,385 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 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 21 [2022-10-15 23:50:32,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 23:50:32,386 INFO L225 Difference]: With dead ends: 54 [2022-10-15 23:50:32,386 INFO L226 Difference]: Without dead ends: 54 [2022-10-15 23:50:32,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2022-10-15 23:50:32,388 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 131 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 23:50:32,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 59 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 23:50:32,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-10-15 23:50:32,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2022-10-15 23:50:32,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 49 states have internal predecessors, (52), 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 23:50:32,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2022-10-15 23:50:32,399 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 21 [2022-10-15 23:50:32,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 23:50:32,400 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2022-10-15 23:50:32,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 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 23:50:32,400 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2022-10-15 23:50:32,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-10-15 23:50:32,403 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:50:32,406 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 23:50:32,446 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 23:50:32,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 23:50:32,608 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 23:50:32,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:50:32,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1987297539, now seen corresponding path program 1 times [2022-10-15 23:50:32,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:50:32,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011008602] [2022-10-15 23:50:32,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:32,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:50:32,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:32,744 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 23:50:32,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:50:32,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011008602] [2022-10-15 23:50:32,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011008602] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 23:50:32,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 23:50:32,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-15 23:50:32,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246251381] [2022-10-15 23:50:32,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 23:50:32,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 23:50:32,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 23:50:32,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 23:50:32,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 23:50:32,749 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:32,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 23:50:32,787 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2022-10-15 23:50:32,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 23:50:32,788 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-10-15 23:50:32,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 23:50:32,789 INFO L225 Difference]: With dead ends: 58 [2022-10-15 23:50:32,789 INFO L226 Difference]: Without dead ends: 58 [2022-10-15 23:50:32,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 23:50:32,791 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 23:50:32,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 29 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 23:50:32,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-10-15 23:50:32,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2022-10-15 23:50:32,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 50 states have internal predecessors, (53), 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 23:50:32,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2022-10-15 23:50:32,805 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 32 [2022-10-15 23:50:32,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 23:50:32,806 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2022-10-15 23:50:32,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:32,806 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2022-10-15 23:50:32,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-10-15 23:50:32,807 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:50:32,807 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 23:50:32,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-10-15 23:50:32,808 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 23:50:32,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:50:32,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1987342068, now seen corresponding path program 1 times [2022-10-15 23:50:32,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:50:32,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121306898] [2022-10-15 23:50:32,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:32,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:50:32,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:32,929 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 23:50:32,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:50:32,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121306898] [2022-10-15 23:50:32,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121306898] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 23:50:32,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 23:50:32,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 23:50:32,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18822422] [2022-10-15 23:50:32,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 23:50:32,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 23:50:32,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 23:50:32,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 23:50:32,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 23:50:32,932 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:32,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 23:50:32,948 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2022-10-15 23:50:32,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 23:50:32,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-10-15 23:50:32,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 23:50:32,950 INFO L225 Difference]: With dead ends: 49 [2022-10-15 23:50:32,950 INFO L226 Difference]: Without dead ends: 49 [2022-10-15 23:50:32,950 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 23:50:32,951 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 23:50:32,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 20 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 23:50:32,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-10-15 23:50:32,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-10-15 23:50:32,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 48 states have internal predecessors, (51), 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 23:50:32,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2022-10-15 23:50:32,956 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 32 [2022-10-15 23:50:32,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 23:50:32,957 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2022-10-15 23:50:32,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:32,957 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2022-10-15 23:50:32,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-10-15 23:50:32,958 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:50:32,958 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 23:50:32,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-10-15 23:50:32,959 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 23:50:32,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:50:32,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1987342069, now seen corresponding path program 1 times [2022-10-15 23:50:32,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:50:32,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294155878] [2022-10-15 23:50:32,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:32,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:50:32,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:33,193 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 23:50:33,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:50:33,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294155878] [2022-10-15 23:50:33,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294155878] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 23:50:33,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 23:50:33,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-15 23:50:33,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643493284] [2022-10-15 23:50:33,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 23:50:33,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-15 23:50:33,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 23:50:33,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-15 23:50:33,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-15 23:50:33,197 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:33,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 23:50:33,251 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2022-10-15 23:50:33,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 23:50:33,252 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-10-15 23:50:33,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 23:50:33,253 INFO L225 Difference]: With dead ends: 54 [2022-10-15 23:50:33,253 INFO L226 Difference]: Without dead ends: 54 [2022-10-15 23:50:33,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-15 23:50:33,255 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 23:50:33,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 27 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 23:50:33,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-10-15 23:50:33,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2022-10-15 23:50:33,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 48 states have (on average 1.125) internal successors, (54), 51 states have internal predecessors, (54), 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 23:50:33,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-10-15 23:50:33,259 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 32 [2022-10-15 23:50:33,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 23:50:33,260 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-10-15 23:50:33,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:33,260 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-10-15 23:50:33,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-10-15 23:50:33,261 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:50:33,261 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 23:50:33,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-10-15 23:50:33,262 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 23:50:33,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:50:33,262 INFO L85 PathProgramCache]: Analyzing trace with hash 974343818, now seen corresponding path program 1 times [2022-10-15 23:50:33,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:50:33,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815587033] [2022-10-15 23:50:33,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:33,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:50:33,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:33,382 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-10-15 23:50:33,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:50:33,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815587033] [2022-10-15 23:50:33,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815587033] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 23:50:33,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162769010] [2022-10-15 23:50:33,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:33,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 23:50:33,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 23:50:33,385 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 23:50:33,409 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 23:50:33,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:33,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-15 23:50:33,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 23:50:33,636 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 23:50:33,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 23:50:33,744 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 23:50:33,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162769010] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 23:50:33,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 23:50:33,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2022-10-15 23:50:33,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418674689] [2022-10-15 23:50:33,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 23:50:33,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-10-15 23:50:33,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 23:50:33,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-10-15 23:50:33,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=184, Unknown=0, NotChecked=0, Total=342 [2022-10-15 23:50:33,748 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 19 states have internal predecessors, (78), 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 23:50:34,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 23:50:34,242 INFO L93 Difference]: Finished difference Result 280 states and 282 transitions. [2022-10-15 23:50:34,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-15 23:50:34,243 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 19 states have internal predecessors, (78), 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 38 [2022-10-15 23:50:34,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 23:50:34,245 INFO L225 Difference]: With dead ends: 280 [2022-10-15 23:50:34,245 INFO L226 Difference]: Without dead ends: 280 [2022-10-15 23:50:34,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=284, Invalid=366, Unknown=0, NotChecked=0, Total=650 [2022-10-15 23:50:34,247 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 587 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 23:50:34,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 97 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 23:50:34,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-10-15 23:50:34,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 232. [2022-10-15 23:50:34,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 228 states have (on average 1.1842105263157894) internal successors, (270), 231 states have internal predecessors, (270), 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 23:50:34,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 270 transitions. [2022-10-15 23:50:34,257 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 270 transitions. Word has length 38 [2022-10-15 23:50:34,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 23:50:34,257 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 270 transitions. [2022-10-15 23:50:34,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 19 states have internal predecessors, (78), 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 23:50:34,258 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 270 transitions. [2022-10-15 23:50:34,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-10-15 23:50:34,260 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:50:34,260 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 23:50:34,298 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 23:50:34,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 23:50:34,474 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 23:50:34,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:50:34,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1336062813, now seen corresponding path program 1 times [2022-10-15 23:50:34,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:50:34,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701696880] [2022-10-15 23:50:34,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:34,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:50:34,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:35,065 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-15 23:50:35,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:50:35,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701696880] [2022-10-15 23:50:35,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701696880] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 23:50:35,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045196464] [2022-10-15 23:50:35,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:35,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 23:50:35,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 23:50:35,070 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 23:50:35,095 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 23:50:35,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:35,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 17 conjunts are in the unsatisfiable core [2022-10-15 23:50:35,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 23:50:35,586 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-15 23:50:35,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 23:50:36,045 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-15 23:50:36,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045196464] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 23:50:36,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 23:50:36,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 47 [2022-10-15 23:50:36,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147279274] [2022-10-15 23:50:36,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 23:50:36,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-10-15 23:50:36,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 23:50:36,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-10-15 23:50:36,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=1172, Unknown=0, NotChecked=0, Total=2162 [2022-10-15 23:50:36,050 INFO L87 Difference]: Start difference. First operand 232 states and 270 transitions. Second operand has 47 states, 47 states have (on average 3.893617021276596) internal successors, (183), 47 states have internal predecessors, (183), 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 23:50:36,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 23:50:36,293 INFO L93 Difference]: Finished difference Result 296 states and 334 transitions. [2022-10-15 23:50:36,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-10-15 23:50:36,294 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.893617021276596) internal successors, (183), 47 states have internal predecessors, (183), 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 70 [2022-10-15 23:50:36,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 23:50:36,296 INFO L225 Difference]: With dead ends: 296 [2022-10-15 23:50:36,296 INFO L226 Difference]: Without dead ends: 296 [2022-10-15 23:50:36,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=990, Invalid=1172, Unknown=0, NotChecked=0, Total=2162 [2022-10-15 23:50:36,299 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 102 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 23:50:36,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 38 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 23:50:36,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-10-15 23:50:36,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2022-10-15 23:50:36,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 292 states have (on average 1.143835616438356) internal successors, (334), 295 states have internal predecessors, (334), 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 23:50:36,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 334 transitions. [2022-10-15 23:50:36,308 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 334 transitions. Word has length 70 [2022-10-15 23:50:36,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 23:50:36,309 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 334 transitions. [2022-10-15 23:50:36,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.893617021276596) internal successors, (183), 47 states have internal predecessors, (183), 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 23:50:36,309 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 334 transitions. [2022-10-15 23:50:36,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-10-15 23:50:36,311 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:50:36,312 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 23:50:36,351 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 23:50:36,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 23:50:36,528 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 23:50:36,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:50:36,529 INFO L85 PathProgramCache]: Analyzing trace with hash -2133848845, now seen corresponding path program 2 times [2022-10-15 23:50:36,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:50:36,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975368020] [2022-10-15 23:50:36,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:36,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:50:36,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:38,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1774 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-15 23:50:38,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:50:38,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975368020] [2022-10-15 23:50:38,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975368020] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 23:50:38,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243261229] [2022-10-15 23:50:38,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 23:50:38,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 23:50:38,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 23:50:38,457 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 23:50:38,462 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 23:50:38,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 23:50:38,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 23:50:38,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-15 23:50:38,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 23:50:38,636 INFO L356 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-10-15 23:50:38,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-10-15 23:50:39,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1774 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2022-10-15 23:50:39,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 23:50:41,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1774 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2022-10-15 23:50:41,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243261229] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 23:50:41,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 23:50:41,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 4, 4] total 39 [2022-10-15 23:50:41,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995044930] [2022-10-15 23:50:41,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 23:50:41,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-10-15 23:50:41,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 23:50:41,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-10-15 23:50:41,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=937, Unknown=0, NotChecked=0, Total=1482 [2022-10-15 23:50:41,525 INFO L87 Difference]: Start difference. First operand 296 states and 334 transitions. Second operand has 39 states, 39 states have (on average 4.230769230769231) internal successors, (165), 39 states have internal predecessors, (165), 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 23:50:43,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 23:50:43,445 INFO L93 Difference]: Finished difference Result 307 states and 334 transitions. [2022-10-15 23:50:43,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-10-15 23:50:43,446 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.230769230769231) internal successors, (165), 39 states have internal predecessors, (165), 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 134 [2022-10-15 23:50:43,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 23:50:43,448 INFO L225 Difference]: With dead ends: 307 [2022-10-15 23:50:43,448 INFO L226 Difference]: Without dead ends: 307 [2022-10-15 23:50:43,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1831, Invalid=3281, Unknown=0, NotChecked=0, Total=5112 [2022-10-15 23:50:43,453 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 319 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 23:50:43,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 41 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 23:50:43,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-10-15 23:50:43,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 299. [2022-10-15 23:50:43,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 296 states have (on average 1.097972972972973) internal successors, (325), 298 states have internal predecessors, (325), 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 23:50:43,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 325 transitions. [2022-10-15 23:50:43,461 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 325 transitions. Word has length 134 [2022-10-15 23:50:43,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 23:50:43,462 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 325 transitions. [2022-10-15 23:50:43,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.230769230769231) internal successors, (165), 39 states have internal predecessors, (165), 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 23:50:43,462 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 325 transitions. [2022-10-15 23:50:43,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-10-15 23:50:43,465 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:50:43,465 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 31, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 23:50:43,504 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 23:50:43,679 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,SelfDestructingSolverStorable14 [2022-10-15 23:50:43,680 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 23:50:43,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:50:43,681 INFO L85 PathProgramCache]: Analyzing trace with hash -516335275, now seen corresponding path program 2 times [2022-10-15 23:50:43,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:50:43,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255263587] [2022-10-15 23:50:43,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:43,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:50:43,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:45,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2451 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 560 trivial. 0 not checked. [2022-10-15 23:50:45,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:50:45,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255263587] [2022-10-15 23:50:45,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255263587] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 23:50:45,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919973564] [2022-10-15 23:50:45,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 23:50:45,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 23:50:45,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 23:50:45,891 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 23:50:45,914 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 23:50:46,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 23:50:46,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 23:50:46,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-15 23:50:46,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 23:50:46,092 INFO L356 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-10-15 23:50:46,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-10-15 23:50:46,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2451 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2451 trivial. 0 not checked. [2022-10-15 23:50:46,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 23:50:46,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919973564] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 23:50:46,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 23:50:46,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [34] total 36 [2022-10-15 23:50:46,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313147127] [2022-10-15 23:50:46,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 23:50:46,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 23:50:46,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 23:50:46,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 23:50:46,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-10-15 23:50:46,873 INFO L87 Difference]: Start difference. First operand 299 states and 325 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 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 23:50:46,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 23:50:46,905 INFO L93 Difference]: Finished difference Result 301 states and 325 transitions. [2022-10-15 23:50:46,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 23:50:46,905 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 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 216 [2022-10-15 23:50:46,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 23:50:46,908 INFO L225 Difference]: With dead ends: 301 [2022-10-15 23:50:46,908 INFO L226 Difference]: Without dead ends: 301 [2022-10-15 23:50:46,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-10-15 23:50:46,910 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 24 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 23:50:46,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 25 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 23:50:46,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-10-15 23:50:46,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 299. [2022-10-15 23:50:46,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 296 states have (on average 1.0945945945945945) internal successors, (324), 298 states have internal predecessors, (324), 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 23:50:46,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 324 transitions. [2022-10-15 23:50:46,920 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 324 transitions. Word has length 216 [2022-10-15 23:50:46,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 23:50:46,921 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 324 transitions. [2022-10-15 23:50:46,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 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 23:50:46,922 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 324 transitions. [2022-10-15 23:50:46,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-10-15 23:50:46,924 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:50:46,924 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 31, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 23:50:46,964 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 23:50:47,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-10-15 23:50:47,139 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 23:50:47,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:50:47,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1866292439, now seen corresponding path program 1 times [2022-10-15 23:50:47,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:50:47,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410757308] [2022-10-15 23:50:47,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:47,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:50:47,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:49,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2451 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 560 trivial. 0 not checked. [2022-10-15 23:50:49,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:50:49,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410757308] [2022-10-15 23:50:49,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410757308] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 23:50:49,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891629217] [2022-10-15 23:50:49,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:49,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 23:50:49,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 23:50:49,212 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 23:50:49,222 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 23:50:49,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:49,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 1013 conjuncts, 34 conjunts are in the unsatisfiable core [2022-10-15 23:50:49,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 23:50:50,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2451 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 560 trivial. 0 not checked. [2022-10-15 23:50:50,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 23:50:52,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2451 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 560 trivial. 0 not checked. [2022-10-15 23:50:52,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891629217] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 23:50:52,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 23:50:52,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 98 [2022-10-15 23:50:52,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926413065] [2022-10-15 23:50:52,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 23:50:52,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-10-15 23:50:52,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 23:50:52,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-10-15 23:50:52,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4288, Invalid=5218, Unknown=0, NotChecked=0, Total=9506 [2022-10-15 23:50:52,326 INFO L87 Difference]: Start difference. First operand 299 states and 324 transitions. Second operand has 98 states, 98 states have (on average 4.010204081632653) internal successors, (393), 98 states have internal predecessors, (393), 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 23:50:52,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 23:50:52,971 INFO L93 Difference]: Finished difference Result 431 states and 456 transitions. [2022-10-15 23:50:52,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-10-15 23:50:52,972 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 4.010204081632653) internal successors, (393), 98 states have internal predecessors, (393), 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 219 [2022-10-15 23:50:52,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 23:50:52,975 INFO L225 Difference]: With dead ends: 431 [2022-10-15 23:50:52,975 INFO L226 Difference]: Without dead ends: 431 [2022-10-15 23:50:52,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3998 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4288, Invalid=5218, Unknown=0, NotChecked=0, Total=9506 [2022-10-15 23:50:52,979 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 299 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-15 23:50:52,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 95 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-15 23:50:52,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-10-15 23:50:52,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 431. [2022-10-15 23:50:52,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 428 states have (on average 1.0654205607476634) internal successors, (456), 430 states have internal predecessors, (456), 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 23:50:52,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 456 transitions. [2022-10-15 23:50:52,990 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 456 transitions. Word has length 219 [2022-10-15 23:50:52,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 23:50:52,990 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 456 transitions. [2022-10-15 23:50:52,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 4.010204081632653) internal successors, (393), 98 states have internal predecessors, (393), 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 23:50:52,991 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 456 transitions. [2022-10-15 23:50:52,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2022-10-15 23:50:52,997 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:50:52,997 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 64, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 23:50:53,039 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 23:50:53,213 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,SelfDestructingSolverStorable16 [2022-10-15 23:50:53,214 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 23:50:53,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:50:53,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1627686684, now seen corresponding path program 2 times [2022-10-15 23:50:53,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:50:53,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163013336] [2022-10-15 23:50:53,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:53,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:50:53,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:59,927 INFO L134 CoverageAnalysis]: Checked inductivity of 8688 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 560 trivial. 0 not checked. [2022-10-15 23:50:59,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:50:59,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163013336] [2022-10-15 23:50:59,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163013336] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 23:50:59,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758580023] [2022-10-15 23:50:59,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 23:50:59,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 23:50:59,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 23:50:59,929 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 23:50:59,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-10-15 23:51:00,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 23:51:00,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 23:51:00,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 1640 conjuncts, 67 conjunts are in the unsatisfiable core [2022-10-15 23:51:00,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 23:51:03,912 INFO L134 CoverageAnalysis]: Checked inductivity of 8688 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 560 trivial. 0 not checked. [2022-10-15 23:51:03,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 23:51:11,509 INFO L134 CoverageAnalysis]: Checked inductivity of 8688 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 560 trivial. 0 not checked. [2022-10-15 23:51:11,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758580023] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 23:51:11,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 23:51:11,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 197 [2022-10-15 23:51:11,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648595336] [2022-10-15 23:51:11,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 23:51:11,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 197 states [2022-10-15 23:51:11,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 23:51:11,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2022-10-15 23:51:11,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17290, Invalid=21322, Unknown=0, NotChecked=0, Total=38612 [2022-10-15 23:51:11,533 INFO L87 Difference]: Start difference. First operand 431 states and 456 transitions. Second operand has 197 states, 197 states have (on average 4.00507614213198) internal successors, (789), 197 states have internal predecessors, (789), 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 23:51:13,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 23:51:13,251 INFO L93 Difference]: Finished difference Result 695 states and 720 transitions. [2022-10-15 23:51:13,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-10-15 23:51:13,253 INFO L78 Accepts]: Start accepts. Automaton has has 197 states, 197 states have (on average 4.00507614213198) internal successors, (789), 197 states have internal predecessors, (789), 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 351 [2022-10-15 23:51:13,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 23:51:13,258 INFO L225 Difference]: With dead ends: 695 [2022-10-15 23:51:13,258 INFO L226 Difference]: Without dead ends: 695 [2022-10-15 23:51:13,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 767 GetRequests, 572 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16703 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=17290, Invalid=21322, Unknown=0, NotChecked=0, Total=38612 [2022-10-15 23:51:13,263 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 791 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-15 23:51:13,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [791 Valid, 68 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-10-15 23:51:13,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2022-10-15 23:51:13,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 695. [2022-10-15 23:51:13,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 692 states have (on average 1.0404624277456647) internal successors, (720), 694 states have internal predecessors, (720), 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 23:51:13,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 720 transitions. [2022-10-15 23:51:13,281 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 720 transitions. Word has length 351 [2022-10-15 23:51:13,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 23:51:13,281 INFO L495 AbstractCegarLoop]: Abstraction has 695 states and 720 transitions. [2022-10-15 23:51:13,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 197 states, 197 states have (on average 4.00507614213198) internal successors, (789), 197 states have internal predecessors, (789), 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 23:51:13,283 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 720 transitions. [2022-10-15 23:51:13,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 616 [2022-10-15 23:51:13,297 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:51:13,298 INFO L195 NwaCegarLoop]: trace histogram [130, 130, 130, 130, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 23:51:13,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-10-15 23:51:13,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-10-15 23:51:13,499 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 23:51:13,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:51:13,501 INFO L85 PathProgramCache]: Analyzing trace with hash -246295590, now seen corresponding path program 3 times [2022-10-15 23:51:13,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:51:13,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468570442] [2022-10-15 23:51:13,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:51:13,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:51:14,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:51:35,607 INFO L134 CoverageAnalysis]: Checked inductivity of 34230 backedges. 0 proven. 33670 refuted. 0 times theorem prover too weak. 560 trivial. 0 not checked. [2022-10-15 23:51:35,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:51:35,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468570442] [2022-10-15 23:51:35,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468570442] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 23:51:35,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798728216] [2022-10-15 23:51:35,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 23:51:35,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 23:51:35,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 23:51:35,615 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 23:51:35,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-10-15 23:51:58,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-10-15 23:51:58,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 23:51:58,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 17 conjunts are in the unsatisfiable core [2022-10-15 23:51:58,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 23:52:00,014 INFO L134 CoverageAnalysis]: Checked inductivity of 34230 backedges. 0 proven. 560 refuted. 0 times theorem prover too weak. 33670 trivial. 0 not checked. [2022-10-15 23:52:00,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 23:52:03,350 INFO L134 CoverageAnalysis]: Checked inductivity of 34230 backedges. 0 proven. 560 refuted. 0 times theorem prover too weak. 33670 trivial. 0 not checked. [2022-10-15 23:52:03,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798728216] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 23:52:03,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 23:52:03,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 18, 18] total 165 [2022-10-15 23:52:03,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758227649] [2022-10-15 23:52:03,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 23:52:03,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 165 states [2022-10-15 23:52:03,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 23:52:03,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2022-10-15 23:52:03,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13149, Invalid=13911, Unknown=0, NotChecked=0, Total=27060 [2022-10-15 23:52:03,367 INFO L87 Difference]: Start difference. First operand 695 states and 720 transitions. Second operand has 165 states, 165 states have (on average 4.36969696969697) internal successors, (721), 165 states have internal predecessors, (721), 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 23:52:51,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 23:52:51,641 INFO L93 Difference]: Finished difference Result 2774 states and 2776 transitions. [2022-10-15 23:52:51,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-10-15 23:52:51,642 INFO L78 Accepts]: Start accepts. Automaton has has 165 states, 165 states have (on average 4.36969696969697) internal successors, (721), 165 states have internal predecessors, (721), 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 615 [2022-10-15 23:52:51,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 23:52:51,657 INFO L225 Difference]: With dead ends: 2774 [2022-10-15 23:52:51,657 INFO L226 Difference]: Without dead ends: 2774 [2022-10-15 23:52:51,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1492 GetRequests, 1198 SyntacticMatches, 0 SemanticMatches, 294 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15221 ImplicationChecksByTransitivity, 25.3s TimeCoverageRelationStatistics Valid=32930, Invalid=54390, Unknown=0, NotChecked=0, Total=87320 [2022-10-15 23:52:51,666 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 11106 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 2027 mSolverCounterSat, 2001 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11106 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 4028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2001 IncrementalHoareTripleChecker+Valid, 2027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-10-15 23:52:51,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11106 Valid, 953 Invalid, 4028 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2001 Valid, 2027 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-10-15 23:52:51,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2774 states. [2022-10-15 23:52:51,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2774 to 2343. [2022-10-15 23:52:51,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2340 states have (on average 1.1247863247863248) internal successors, (2632), 2342 states have internal predecessors, (2632), 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 23:52:51,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 2632 transitions. [2022-10-15 23:52:51,723 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 2632 transitions. Word has length 615 [2022-10-15 23:52:51,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 23:52:51,724 INFO L495 AbstractCegarLoop]: Abstraction has 2343 states and 2632 transitions. [2022-10-15 23:52:51,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 165 states, 165 states have (on average 4.36969696969697) internal successors, (721), 165 states have internal predecessors, (721), 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 23:52:51,726 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 2632 transitions. [2022-10-15 23:52:51,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1472 [2022-10-15 23:52:51,788 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:52:51,789 INFO L195 NwaCegarLoop]: trace histogram [146, 146, 146, 146, 146, 146, 146, 146, 146, 146, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 23:52:51,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-10-15 23:52:51,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 23:52:51,990 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 23:52:51,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:52:51,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1293420658, now seen corresponding path program 4 times [2022-10-15 23:52:51,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:52:51,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986638676] [2022-10-15 23:52:51,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:52:51,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:52:53,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:53:35,411 INFO L134 CoverageAnalysis]: Checked inductivity of 106142 backedges. 0 proven. 42486 refuted. 0 times theorem prover too weak. 63656 trivial. 0 not checked. [2022-10-15 23:53:35,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:53:35,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986638676] [2022-10-15 23:53:35,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986638676] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 23:53:35,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776315133] [2022-10-15 23:53:35,413 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-15 23:53:35,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 23:53:35,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 23:53:35,419 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 23:53:35,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process