/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-industry-pattern/array_range_init.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 16:21:18,491 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 16:21:18,494 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 16:21:18,532 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-10-15 16:21:18,580 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 16:21:18,582 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 16:21:18,583 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 16:21:18,584 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-15 16:21:18,613 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 16:21:18,614 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 16:21:18,614 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 16:21:18,615 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 16:21:18,615 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 16:21:18,616 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 16:21:18,617 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 16:21:18,617 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 16:21:18,617 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 16:21:18,618 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 16:21:18,618 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 16:21:18,618 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 16:21:18,618 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 16:21:18,619 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 16:21:18,619 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 16:21:18,619 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 16:21:18,619 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 16:21:18,620 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 16:21:18,620 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 16:21:18,620 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 16:21:18,620 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 16:21:18,621 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 16:21:18,621 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 16:21:18,621 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 16:21:18,622 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 16:21:18,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 16:21:18,622 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 16:21:18,622 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 16:21:18,623 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 16:21:18,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 16:21:18,623 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 16:21:19,031 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 16:21:19,063 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 16:21:19,068 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 16:21:19,070 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 16:21:19,071 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 16:21:19,073 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_range_init.i [2022-10-15 16:21:19,161 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/152fb299d/5041705ed9744b9b93ba661555c495b2/FLAGffea12159 [2022-10-15 16:21:19,878 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 16:21:19,879 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_range_init.i [2022-10-15 16:21:19,890 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/152fb299d/5041705ed9744b9b93ba661555c495b2/FLAGffea12159 [2022-10-15 16:21:19,908 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/152fb299d/5041705ed9744b9b93ba661555c495b2 [2022-10-15 16:21:19,912 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 16:21:19,921 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 16:21:19,925 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 16:21:19,925 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 16:21:19,930 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 16:21:19,931 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:21:19" (1/1) ... [2022-10-15 16:21:19,933 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@640f697a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:21:19, skipping insertion in model container [2022-10-15 16:21:19,933 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:21:19" (1/1) ... [2022-10-15 16:21:19,944 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 16:21:19,961 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 16:21:20,116 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-industry-pattern/array_range_init.i[809,822] [2022-10-15 16:21:20,141 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 16:21:20,154 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 16:21:20,169 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-industry-pattern/array_range_init.i[809,822] [2022-10-15 16:21:20,173 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 16:21:20,190 INFO L208 MainTranslator]: Completed translation [2022-10-15 16:21:20,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:21:20 WrapperNode [2022-10-15 16:21:20,191 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 16:21:20,192 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 16:21:20,192 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 16:21:20,192 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 16:21:20,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:21:20" (1/1) ... [2022-10-15 16:21:20,210 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:21:20" (1/1) ... [2022-10-15 16:21:20,230 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 42 [2022-10-15 16:21:20,231 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 16:21:20,231 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 16:21:20,232 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 16:21:20,232 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 16:21:20,243 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:21:20" (1/1) ... [2022-10-15 16:21:20,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:21:20" (1/1) ... [2022-10-15 16:21:20,256 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:21:20" (1/1) ... [2022-10-15 16:21:20,256 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:21:20" (1/1) ... [2022-10-15 16:21:20,273 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:21:20" (1/1) ... [2022-10-15 16:21:20,285 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:21:20" (1/1) ... [2022-10-15 16:21:20,287 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:21:20" (1/1) ... [2022-10-15 16:21:20,288 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:21:20" (1/1) ... [2022-10-15 16:21:20,291 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 16:21:20,292 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 16:21:20,292 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 16:21:20,294 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 16:21:20,295 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:21:20" (1/1) ... [2022-10-15 16:21:20,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 16:21:20,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:21:20,347 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-15 16:21:20,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-15 16:21:20,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 16:21:20,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 16:21:20,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 16:21:20,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 16:21:20,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 16:21:20,452 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 16:21:20,564 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 16:21:20,567 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 16:21:20,863 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 16:21:20,882 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 16:21:20,883 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-10-15 16:21:20,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:21:20 BoogieIcfgContainer [2022-10-15 16:21:20,893 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 16:21:20,899 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 16:21:20,899 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 16:21:20,909 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 16:21:20,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 04:21:19" (1/3) ... [2022-10-15 16:21:20,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@223c462f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:21:20, skipping insertion in model container [2022-10-15 16:21:20,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:21:20" (2/3) ... [2022-10-15 16:21:20,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@223c462f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:21:20, skipping insertion in model container [2022-10-15 16:21:20,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:21:20" (3/3) ... [2022-10-15 16:21:20,920 INFO L112 eAbstractionObserver]: Analyzing ICFG array_range_init.i [2022-10-15 16:21:20,973 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 16:21:20,973 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-10-15 16:21:21,050 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 16:21:21,061 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;@538c17b9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 16:21:21,061 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-10-15 16:21:21,067 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:21:21,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-10-15 16:21:21,076 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:21:21,077 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-10-15 16:21:21,078 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-15 16:21:21,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:21:21,087 INFO L85 PathProgramCache]: Analyzing trace with hash 28698921, now seen corresponding path program 1 times [2022-10-15 16:21:21,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:21:21,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38184699] [2022-10-15 16:21:21,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:21:21,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:21:21,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:21:21,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:21:21,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:21:21,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38184699] [2022-10-15 16:21:21,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38184699] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:21:21,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:21:21,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-15 16:21:21,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472672818] [2022-10-15 16:21:21,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:21:21,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 16:21:21,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:21:21,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 16:21:21,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 16:21:21,403 INFO L87 Difference]: Start difference. First operand has 27 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) 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 16:21:21,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:21:21,473 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2022-10-15 16:21:21,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 16:21:21,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) 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 16:21:21,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:21:21,487 INFO L225 Difference]: With dead ends: 43 [2022-10-15 16:21:21,487 INFO L226 Difference]: Without dead ends: 41 [2022-10-15 16:21:21,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 16:21:21,494 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 16:21:21,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 33 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 16:21:21,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-10-15 16:21:21,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2022-10-15 16:21:21,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:21:21,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-10-15 16:21:21,535 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 5 [2022-10-15 16:21:21,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:21:21,535 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-10-15 16:21:21,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) 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 16:21:21,536 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-10-15 16:21:21,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-10-15 16:21:21,537 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:21:21,537 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-10-15 16:21:21,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 16:21:21,538 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-15 16:21:21,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:21:21,539 INFO L85 PathProgramCache]: Analyzing trace with hash 28698762, now seen corresponding path program 1 times [2022-10-15 16:21:21,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:21:21,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028881336] [2022-10-15 16:21:21,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:21:21,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:21:21,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:21:21,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:21:21,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:21:21,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028881336] [2022-10-15 16:21:21,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028881336] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:21:21,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:21:21,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 16:21:21,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020711719] [2022-10-15 16:21:21,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:21:21,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 16:21:21,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:21:21,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 16:21:21,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 16:21:21,822 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) 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 16:21:21,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:21:21,913 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2022-10-15 16:21:21,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 16:21:21,914 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) 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 16:21:21,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:21:21,915 INFO L225 Difference]: With dead ends: 39 [2022-10-15 16:21:21,915 INFO L226 Difference]: Without dead ends: 39 [2022-10-15 16:21:21,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 16:21:21,918 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 48 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:21:21,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 20 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:21:21,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-10-15 16:21:21,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2022-10-15 16:21:21,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:21:21,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-10-15 16:21:21,926 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 5 [2022-10-15 16:21:21,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:21:21,926 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-10-15 16:21:21,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) 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 16:21:21,927 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-10-15 16:21:21,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-10-15 16:21:21,927 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:21:21,927 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-10-15 16:21:21,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 16:21:21,928 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-15 16:21:21,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:21:21,929 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-10-15 16:21:21,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:21:21,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687573961] [2022-10-15 16:21:21,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:21:21,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:21:21,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:21:22,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:21:22,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:21:22,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687573961] [2022-10-15 16:21:22,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687573961] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:21:22,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:21:22,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 16:21:22,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500065810] [2022-10-15 16:21:22,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:21:22,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 16:21:22,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:21:22,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 16:21:22,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 16:21:22,053 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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 16:21:22,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:21:22,090 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2022-10-15 16:21:22,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 16:21:22,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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 16:21:22,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:21:22,095 INFO L225 Difference]: With dead ends: 27 [2022-10-15 16:21:22,096 INFO L226 Difference]: Without dead ends: 27 [2022-10-15 16:21:22,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 16:21:22,101 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 16:21:22,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 16 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 16:21:22,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-10-15 16:21:22,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-10-15 16:21:22,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:21:22,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-10-15 16:21:22,120 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 5 [2022-10-15 16:21:22,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:21:22,121 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-10-15 16:21:22,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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 16:21:22,122 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-10-15 16:21:22,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-15 16:21:22,122 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:21:22,125 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:21:22,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-15 16:21:22,125 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-15 16:21:22,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:21:22,126 INFO L85 PathProgramCache]: Analyzing trace with hash -334954274, now seen corresponding path program 1 times [2022-10-15 16:21:22,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:21:22,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128081323] [2022-10-15 16:21:22,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:21:22,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:21:22,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:21:22,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:21:22,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:21:22,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128081323] [2022-10-15 16:21:22,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128081323] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:21:22,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197336931] [2022-10-15 16:21:22,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:21:22,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:21:22,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:21:22,304 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:21:22,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-15 16:21:22,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:21:22,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-15 16:21:22,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:21:22,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:21:22,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:21:22,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:21:22,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197336931] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:21:22,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:21:22,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2022-10-15 16:21:22,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196255634] [2022-10-15 16:21:22,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:21:22,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-15 16:21:22,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:21:22,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-15 16:21:22,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-10-15 16:21:22,489 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:21:22,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:21:22,603 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2022-10-15 16:21:22,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 16:21:22,604 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-10-15 16:21:22,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:21:22,605 INFO L225 Difference]: With dead ends: 74 [2022-10-15 16:21:22,605 INFO L226 Difference]: Without dead ends: 74 [2022-10-15 16:21:22,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-10-15 16:21:22,608 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 78 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:21:22,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 46 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:21:22,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-10-15 16:21:22,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 55. [2022-10-15 16:21:22,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.28) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:21:22,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-10-15 16:21:22,619 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 9 [2022-10-15 16:21:22,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:21:22,620 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-10-15 16:21:22,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:21:22,620 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-10-15 16:21:22,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-15 16:21:22,621 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:21:22,621 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2022-10-15 16:21:22,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-10-15 16:21:22,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:21:22,835 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-15 16:21:22,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:21:22,837 INFO L85 PathProgramCache]: Analyzing trace with hash -334954434, now seen corresponding path program 1 times [2022-10-15 16:21:22,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:21:22,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410184765] [2022-10-15 16:21:22,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:21:22,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:21:22,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:21:23,074 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 16:21:23,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:21:23,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410184765] [2022-10-15 16:21:23,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410184765] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:21:23,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566983927] [2022-10-15 16:21:23,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:21:23,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:21:23,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:21:23,078 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:21:23,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-15 16:21:23,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:21:23,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-15 16:21:23,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:21:23,253 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 16:21:23,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:21:23,396 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 16:21:23,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566983927] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:21:23,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:21:23,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2022-10-15 16:21:23,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110570414] [2022-10-15 16:21:23,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:21:23,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-15 16:21:23,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:21:23,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-15 16:21:23,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-10-15 16:21:23,405 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:21:23,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:21:23,696 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2022-10-15 16:21:23,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-15 16:21:23,697 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 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 16:21:23,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:21:23,698 INFO L225 Difference]: With dead ends: 65 [2022-10-15 16:21:23,698 INFO L226 Difference]: Without dead ends: 65 [2022-10-15 16:21:23,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-10-15 16:21:23,701 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 172 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:21:23,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 53 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:21:23,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-10-15 16:21:23,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2022-10-15 16:21:23,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 58 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:21:23,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2022-10-15 16:21:23,710 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 9 [2022-10-15 16:21:23,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:21:23,711 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2022-10-15 16:21:23,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:21:23,712 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2022-10-15 16:21:23,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-15 16:21:23,713 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:21:23,713 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 2, 1, 1, 1, 1] [2022-10-15 16:21:23,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-15 16:21:23,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:21:23,928 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-15 16:21:23,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:21:23,929 INFO L85 PathProgramCache]: Analyzing trace with hash 2002275406, now seen corresponding path program 1 times [2022-10-15 16:21:23,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:21:23,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102348980] [2022-10-15 16:21:23,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:21:23,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:21:23,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:21:24,112 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 16:21:24,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:21:24,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102348980] [2022-10-15 16:21:24,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102348980] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:21:24,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536335192] [2022-10-15 16:21:24,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:21:24,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:21:24,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:21:24,115 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:21:24,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-15 16:21:24,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:21:24,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-15 16:21:24,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:21:24,238 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 16:21:24,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:21:24,369 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 16:21:24,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536335192] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:21:24,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:21:24,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-10-15 16:21:24,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980837489] [2022-10-15 16:21:24,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:21:24,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-15 16:21:24,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:21:24,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-15 16:21:24,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-10-15 16:21:24,373 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:21:24,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:21:24,689 INFO L93 Difference]: Finished difference Result 149 states and 152 transitions. [2022-10-15 16:21:24,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-15 16:21:24,690 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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) Word has length 25 [2022-10-15 16:21:24,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:21:24,692 INFO L225 Difference]: With dead ends: 149 [2022-10-15 16:21:24,692 INFO L226 Difference]: Without dead ends: 149 [2022-10-15 16:21:24,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-10-15 16:21:24,694 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 263 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 16:21:24,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 178 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 16:21:24,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-10-15 16:21:24,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 118. [2022-10-15 16:21:24,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 114 states have (on average 1.1842105263157894) internal successors, (135), 117 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:21:24,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 135 transitions. [2022-10-15 16:21:24,707 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 135 transitions. Word has length 25 [2022-10-15 16:21:24,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:21:24,708 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 135 transitions. [2022-10-15 16:21:24,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:21:24,708 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 135 transitions. [2022-10-15 16:21:24,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-10-15 16:21:24,710 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:21:24,710 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 10, 2, 1, 1, 1, 1] [2022-10-15 16:21:24,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-15 16:21:24,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:21:24,926 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-15 16:21:24,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:21:24,928 INFO L85 PathProgramCache]: Analyzing trace with hash 906750086, now seen corresponding path program 2 times [2022-10-15 16:21:24,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:21:24,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918264568] [2022-10-15 16:21:24,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:21:24,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:21:24,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:21:25,315 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 32 proven. 200 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 16:21:25,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:21:25,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918264568] [2022-10-15 16:21:25,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918264568] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:21:25,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813957405] [2022-10-15 16:21:25,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 16:21:25,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:21:25,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:21:25,318 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:21:25,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-15 16:21:25,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 16:21:25,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:21:25,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 23 conjunts are in the unsatisfiable core [2022-10-15 16:21:25,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:21:25,530 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 32 proven. 200 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 16:21:25,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:21:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 32 proven. 200 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 16:21:25,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813957405] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:21:25,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:21:25,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2022-10-15 16:21:25,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189055274] [2022-10-15 16:21:25,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:21:25,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-10-15 16:21:25,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:21:25,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-10-15 16:21:25,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-10-15 16:21:25,889 INFO L87 Difference]: Start difference. First operand 118 states and 135 transitions. Second operand has 24 states, 24 states have (on average 3.8333333333333335) internal successors, (92), 24 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:21:27,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:21:27,078 INFO L93 Difference]: Finished difference Result 305 states and 308 transitions. [2022-10-15 16:21:27,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-10-15 16:21:27,079 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.8333333333333335) internal successors, (92), 24 states have internal predecessors, (92), 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 49 [2022-10-15 16:21:27,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:21:27,084 INFO L225 Difference]: With dead ends: 305 [2022-10-15 16:21:27,084 INFO L226 Difference]: Without dead ends: 305 [2022-10-15 16:21:27,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-10-15 16:21:27,090 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 1059 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 1087 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1059 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-15 16:21:27,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1059 Valid, 703 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1087 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-15 16:21:27,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-10-15 16:21:27,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 238. [2022-10-15 16:21:27,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 234 states have (on average 1.1923076923076923) internal successors, (279), 237 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:21:27,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 279 transitions. [2022-10-15 16:21:27,138 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 279 transitions. Word has length 49 [2022-10-15 16:21:27,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:21:27,138 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 279 transitions. [2022-10-15 16:21:27,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.8333333333333335) internal successors, (92), 24 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:21:27,143 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 279 transitions. [2022-10-15 16:21:27,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-10-15 16:21:27,147 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:21:27,147 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 22, 22, 2, 1, 1, 1, 1] [2022-10-15 16:21:27,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-15 16:21:27,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:21:27,348 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-15 16:21:27,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:21:27,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1373743350, now seen corresponding path program 3 times [2022-10-15 16:21:27,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:21:27,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735682293] [2022-10-15 16:21:27,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:21:27,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:21:27,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:21:28,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1037 backedges. 68 proven. 968 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 16:21:28,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:21:28,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735682293] [2022-10-15 16:21:28,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735682293] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:21:28,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893796805] [2022-10-15 16:21:28,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 16:21:28,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:21:28,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:21:28,660 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:21:28,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-15 16:21:28,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-15 16:21:28,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:21:28,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-15 16:21:28,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:21:29,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1037 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2022-10-15 16:21:29,533 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 16:21:29,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893796805] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:21:29,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 16:21:29,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [25] total 30 [2022-10-15 16:21:29,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243913940] [2022-10-15 16:21:29,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:21:29,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-15 16:21:29,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:21:29,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-15 16:21:29,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=803, Unknown=0, NotChecked=0, Total=870 [2022-10-15 16:21:29,537 INFO L87 Difference]: Start difference. First operand 238 states and 279 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:21:29,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:21:29,585 INFO L93 Difference]: Finished difference Result 238 states and 278 transitions. [2022-10-15 16:21:29,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-15 16:21:29,585 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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 97 [2022-10-15 16:21:29,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:21:29,593 INFO L225 Difference]: With dead ends: 238 [2022-10-15 16:21:29,593 INFO L226 Difference]: Without dead ends: 238 [2022-10-15 16:21:29,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=803, Unknown=0, NotChecked=0, Total=870 [2022-10-15 16:21:29,596 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 24 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 16:21:29,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 16:21:29,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-10-15 16:21:29,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 236. [2022-10-15 16:21:29,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 233 states have (on average 1.184549356223176) internal successors, (276), 235 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:21:29,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 276 transitions. [2022-10-15 16:21:29,629 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 276 transitions. Word has length 97 [2022-10-15 16:21:29,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:21:29,636 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 276 transitions. [2022-10-15 16:21:29,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:21:29,636 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 276 transitions. [2022-10-15 16:21:29,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-10-15 16:21:29,638 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:21:29,640 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:21:29,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-15 16:21:29,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:21:29,855 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-15 16:21:29,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:21:29,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1824367390, now seen corresponding path program 1 times [2022-10-15 16:21:29,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:21:29,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879527577] [2022-10-15 16:21:29,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:21:29,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:21:29,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:21:30,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:21:30,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:21:30,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879527577] [2022-10-15 16:21:30,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879527577] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:21:30,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545280206] [2022-10-15 16:21:30,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:21:30,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:21:30,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:21:30,948 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:21:30,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-15 16:21:31,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:21:31,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 25 conjunts are in the unsatisfiable core [2022-10-15 16:21:31,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:21:31,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:21:31,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:21:32,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:21:32,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545280206] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:21:32,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:21:32,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2022-10-15 16:21:32,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558867895] [2022-10-15 16:21:32,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:21:32,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-10-15 16:21:32,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:21:32,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-10-15 16:21:32,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2022-10-15 16:21:32,232 INFO L87 Difference]: Start difference. First operand 236 states and 276 transitions. Second operand has 51 states, 51 states have (on average 3.9215686274509802) internal successors, (200), 51 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:21:33,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:21:33,429 INFO L93 Difference]: Finished difference Result 636 states and 641 transitions. [2022-10-15 16:21:33,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-10-15 16:21:33,430 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.9215686274509802) internal successors, (200), 51 states have internal predecessors, (200), 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 101 [2022-10-15 16:21:33,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:21:33,434 INFO L225 Difference]: With dead ends: 636 [2022-10-15 16:21:33,434 INFO L226 Difference]: Without dead ends: 632 [2022-10-15 16:21:33,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2022-10-15 16:21:33,437 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1521 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1521 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-15 16:21:33,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1521 Valid, 261 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-15 16:21:33,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-10-15 16:21:33,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 495. [2022-10-15 16:21:33,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 492 states have (on average 1.1951219512195121) internal successors, (588), 494 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:21:33,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 588 transitions. [2022-10-15 16:21:33,454 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 588 transitions. Word has length 101 [2022-10-15 16:21:33,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:21:33,454 INFO L495 AbstractCegarLoop]: Abstraction has 495 states and 588 transitions. [2022-10-15 16:21:33,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.9215686274509802) internal successors, (200), 51 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:21:33,455 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 588 transitions. [2022-10-15 16:21:33,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-10-15 16:21:33,459 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:21:33,459 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:21:33,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-15 16:21:33,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:21:33,673 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-15 16:21:33,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:21:33,675 INFO L85 PathProgramCache]: Analyzing trace with hash -949650926, now seen corresponding path program 2 times [2022-10-15 16:21:33,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:21:33,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179898891] [2022-10-15 16:21:33,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:21:33,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:21:33,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:21:37,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3984 backedges. 0 proven. 3984 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:21:37,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:21:37,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179898891] [2022-10-15 16:21:37,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179898891] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:21:37,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328046999] [2022-10-15 16:21:37,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 16:21:37,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:21:37,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:21:37,021 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:21:37,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-15 16:21:37,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 16:21:37,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:21:37,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 50 conjunts are in the unsatisfiable core [2022-10-15 16:21:37,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:21:37,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3984 backedges. 0 proven. 3984 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:21:37,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:21:40,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3984 backedges. 0 proven. 3984 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:21:40,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328046999] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:21:40,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:21:40,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2022-10-15 16:21:40,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855069403] [2022-10-15 16:21:40,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:21:40,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-10-15 16:21:40,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:21:40,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-10-15 16:21:40,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2022-10-15 16:21:40,932 INFO L87 Difference]: Start difference. First operand 495 states and 588 transitions. Second operand has 101 states, 101 states have (on average 3.9603960396039604) internal successors, (400), 101 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:21:46,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:21:46,788 INFO L93 Difference]: Finished difference Result 1464 states and 1492 transitions. [2022-10-15 16:21:46,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-10-15 16:21:46,789 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 3.9603960396039604) internal successors, (400), 101 states have internal predecessors, (400), 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 201 [2022-10-15 16:21:46,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:21:46,800 INFO L225 Difference]: With dead ends: 1464 [2022-10-15 16:21:46,801 INFO L226 Difference]: Without dead ends: 1369 [2022-10-15 16:21:46,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2022-10-15 16:21:46,807 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 3556 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 597 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3556 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 1407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 597 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-10-15 16:21:46,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3556 Valid, 512 Invalid, 1407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [597 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-10-15 16:21:46,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2022-10-15 16:21:46,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 995. [2022-10-15 16:21:46,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 992 states have (on average 1.1975806451612903) internal successors, (1188), 994 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:21:46,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1188 transitions. [2022-10-15 16:21:46,835 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1188 transitions. Word has length 201 [2022-10-15 16:21:46,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:21:46,835 INFO L495 AbstractCegarLoop]: Abstraction has 995 states and 1188 transitions. [2022-10-15 16:21:46,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 3.9603960396039604) internal successors, (400), 101 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:21:46,836 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1188 transitions. [2022-10-15 16:21:46,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2022-10-15 16:21:46,845 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:21:46,845 INFO L195 NwaCegarLoop]: trace histogram [98, 98, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:21:46,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-15 16:21:47,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:21:47,059 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-15 16:21:47,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:21:47,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1649110234, now seen corresponding path program 3 times [2022-10-15 16:21:47,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:21:47,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118986534] [2022-10-15 16:21:47,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:21:47,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:21:47,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:21:57,687 INFO L134 CoverageAnalysis]: Checked inductivity of 16709 backedges. 0 proven. 16709 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:21:57,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:21:57,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118986534] [2022-10-15 16:21:57,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118986534] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:21:57,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273283713] [2022-10-15 16:21:57,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 16:21:57,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:21:57,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:21:57,689 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:21:57,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process