/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-cav19/array_init_both_ends_multiple_sum.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 23:50:19,656 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 23:50:19,660 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 23:50:19,717 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-10-15 23:50:19,807 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-15 23:50:19,836 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 23:50:19,836 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 23:50:19,836 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 23:50:19,836 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 23:50:19,837 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 23:50:19,838 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 23:50:19,838 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 23:50:19,839 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 23:50:19,839 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 23:50:19,839 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 23:50:19,839 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 23:50:19,840 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 23:50:19,840 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 23:50:19,840 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 23:50:19,840 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 23:50:19,840 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 23:50:19,841 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 23:50:19,841 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 23:50:19,841 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 23:50:19,841 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 23:50:19,842 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 23:50:19,842 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 23:50:19,842 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 23:50:19,842 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 23:50:19,842 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 23:50:19,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 23:50:19,843 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 23:50:19,843 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 23:50:19,843 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 23:50:19,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 23:50:19,844 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 23:50:20,218 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 23:50:20,256 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 23:50:20,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 23:50:20,264 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 23:50:20,264 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 23:50:20,266 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_init_both_ends_multiple_sum.c [2022-10-15 23:50:20,343 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6109d6be3/dda9f9459a404dec943884f67d597bde/FLAGe40afc704 [2022-10-15 23:50:21,037 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 23:50:21,038 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_both_ends_multiple_sum.c [2022-10-15 23:50:21,045 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6109d6be3/dda9f9459a404dec943884f67d597bde/FLAGe40afc704 [2022-10-15 23:50:21,403 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6109d6be3/dda9f9459a404dec943884f67d597bde [2022-10-15 23:50:21,406 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 23:50:21,413 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 23:50:21,418 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 23:50:21,418 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 23:50:21,422 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 23:50:21,424 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 11:50:21" (1/1) ... [2022-10-15 23:50:21,426 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a8a519b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:50:21, skipping insertion in model container [2022-10-15 23:50:21,426 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 11:50:21" (1/1) ... [2022-10-15 23:50:21,436 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 23:50:21,454 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 23:50:21,630 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_both_ends_multiple_sum.c[424,437] [2022-10-15 23:50:21,661 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 23:50:21,675 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 23:50:21,695 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_both_ends_multiple_sum.c[424,437] [2022-10-15 23:50:21,721 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 23:50:21,740 INFO L208 MainTranslator]: Completed translation [2022-10-15 23:50:21,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:50:21 WrapperNode [2022-10-15 23:50:21,743 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 23:50:21,749 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 23:50:21,749 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 23:50:21,750 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 23:50:21,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:50:21" (1/1) ... [2022-10-15 23:50:21,771 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:50:21" (1/1) ... [2022-10-15 23:50:21,811 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 62 [2022-10-15 23:50:21,812 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 23:50:21,814 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 23:50:21,814 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 23:50:21,815 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 23:50:21,829 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:50:21" (1/1) ... [2022-10-15 23:50:21,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:50:21" (1/1) ... [2022-10-15 23:50:21,844 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:50:21" (1/1) ... [2022-10-15 23:50:21,845 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:50:21" (1/1) ... [2022-10-15 23:50:21,861 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:50:21" (1/1) ... [2022-10-15 23:50:21,874 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:50:21" (1/1) ... [2022-10-15 23:50:21,876 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:50:21" (1/1) ... [2022-10-15 23:50:21,877 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:50:21" (1/1) ... [2022-10-15 23:50:21,886 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 23:50:21,887 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 23:50:21,888 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 23:50:21,888 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 23:50:21,890 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:50:21" (1/1) ... [2022-10-15 23:50:21,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 23:50:21,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 23:50:21,938 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-15 23:50:21,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-15 23:50:22,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 23:50:22,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 23:50:22,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 23:50:22,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 23:50:22,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 23:50:22,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 23:50:22,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 23:50:22,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 23:50:22,162 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 23:50:22,165 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 23:50:22,548 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 23:50:22,560 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 23:50:22,560 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-10-15 23:50:22,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 11:50:22 BoogieIcfgContainer [2022-10-15 23:50:22,567 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 23:50:22,571 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 23:50:22,571 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 23:50:22,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 23:50:22,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 11:50:21" (1/3) ... [2022-10-15 23:50:22,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cab019d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 11:50:22, skipping insertion in model container [2022-10-15 23:50:22,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:50:21" (2/3) ... [2022-10-15 23:50:22,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cab019d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 11:50:22, skipping insertion in model container [2022-10-15 23:50:22,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 11:50:22" (3/3) ... [2022-10-15 23:50:22,587 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_both_ends_multiple_sum.c [2022-10-15 23:50:22,654 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 23:50:22,658 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-10-15 23:50:22,752 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 23:50:22,763 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;@4a8dd464, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 23:50:22,764 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2022-10-15 23:50:22,770 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:22,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 23:50:22,779 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:50:22,780 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 23:50:22,781 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-15 23:50:22,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:50:22,789 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2022-10-15 23:50:22,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:50:22,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615755729] [2022-10-15 23:50:22,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:22,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:50:22,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:23,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 23:50:23,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:50:23,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615755729] [2022-10-15 23:50:23,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615755729] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 23:50:23,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 23:50:23,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 23:50:23,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288422370] [2022-10-15 23:50:23,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 23:50:23,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 23:50:23,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 23:50:23,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 23:50:23,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 23:50:23,394 INFO L87 Difference]: Start difference. First operand has 32 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:23,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 23:50:23,460 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2022-10-15 23:50:23,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 23:50:23,469 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-15 23:50:23,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 23:50:23,479 INFO L225 Difference]: With dead ends: 30 [2022-10-15 23:50:23,479 INFO L226 Difference]: Without dead ends: 28 [2022-10-15 23:50:23,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 23:50:23,486 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 25 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 23:50:23,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 24 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 23:50:23,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-10-15 23:50:23,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-10-15 23:50:23,524 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 23:50:23,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-10-15 23:50:23,527 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 4 [2022-10-15 23:50:23,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 23:50:23,527 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-10-15 23:50:23,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:23,528 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-10-15 23:50:23,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 23:50:23,528 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:50:23,529 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 23:50:23,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 23:50:23,529 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-15 23:50:23,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:50:23,530 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2022-10-15 23:50:23,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:50:23,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959989060] [2022-10-15 23:50:23,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:23,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:50:23,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:23,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 23:50:23,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:50:23,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959989060] [2022-10-15 23:50:23,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959989060] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 23:50:23,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 23:50:23,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 23:50:23,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441689218] [2022-10-15 23:50:23,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 23:50:23,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 23:50:23,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 23:50:23,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 23:50:23,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-15 23:50:23,750 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:23,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 23:50:23,834 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2022-10-15 23:50:23,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 23:50:23,835 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-15 23:50:23,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 23:50:23,837 INFO L225 Difference]: With dead ends: 31 [2022-10-15 23:50:23,837 INFO L226 Difference]: Without dead ends: 31 [2022-10-15 23:50:23,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-15 23:50:23,840 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 32 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 23:50:23,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 25 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 23:50:23,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-10-15 23:50:23,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-10-15 23:50:23,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 29 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 23:50:23,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-10-15 23:50:23,848 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 4 [2022-10-15 23:50:23,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 23:50:23,849 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-10-15 23:50:23,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:23,849 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-10-15 23:50:23,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-15 23:50:23,850 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:50:23,850 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2022-10-15 23:50:23,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 23:50:23,851 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-15 23:50:23,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:50:23,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1809646286, now seen corresponding path program 1 times [2022-10-15 23:50:23,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:50:23,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706076868] [2022-10-15 23:50:23,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:23,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:50:23,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:24,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 23:50:24,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:50:24,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706076868] [2022-10-15 23:50:24,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706076868] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 23:50:24,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811496623] [2022-10-15 23:50:24,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:24,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 23:50:24,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 23:50:24,232 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 23:50:24,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-15 23:50:24,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:24,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjunts are in the unsatisfiable core [2022-10-15 23:50:24,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 23:50:24,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 23:50:24,416 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-15 23:50:24,427 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-15 23:50:24,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 23:50:24,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 23:50:24,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-15 23:50:24,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 23:50:24,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811496623] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 23:50:24,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 23:50:24,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 9 [2022-10-15 23:50:24,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834649349] [2022-10-15 23:50:24,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 23:50:24,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-15 23:50:24,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 23:50:24,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-15 23:50:24,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-10-15 23:50:24,656 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:24,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 23:50:24,842 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2022-10-15 23:50:24,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-15 23:50:24,842 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-15 23:50:24,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 23:50:24,845 INFO L225 Difference]: With dead ends: 41 [2022-10-15 23:50:24,845 INFO L226 Difference]: Without dead ends: 41 [2022-10-15 23:50:24,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-10-15 23:50:24,848 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 52 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 23:50:24,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 38 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 23:50:24,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-10-15 23:50:24,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2022-10-15 23:50:24,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:24,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-10-15 23:50:24,856 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 7 [2022-10-15 23:50:24,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 23:50:24,857 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-10-15 23:50:24,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:24,857 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-10-15 23:50:24,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-15 23:50:24,858 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:50:24,858 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-15 23:50:24,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-15 23:50:25,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 23:50:25,074 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-15 23:50:25,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:50:25,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1021848304, now seen corresponding path program 1 times [2022-10-15 23:50:25,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:50:25,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337429082] [2022-10-15 23:50:25,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:25,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:50:25,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:25,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-15 23:50:25,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:50:25,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337429082] [2022-10-15 23:50:25,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337429082] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 23:50:25,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 23:50:25,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 23:50:25,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235588916] [2022-10-15 23:50:25,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 23:50:25,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 23:50:25,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 23:50:25,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 23:50:25,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 23:50:25,135 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:25,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 23:50:25,153 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-10-15 23:50:25,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 23:50:25,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-10-15 23:50:25,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 23:50:25,155 INFO L225 Difference]: With dead ends: 37 [2022-10-15 23:50:25,155 INFO L226 Difference]: Without dead ends: 37 [2022-10-15 23:50:25,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 23:50:25,157 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 23:50:25,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 21 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 23:50:25,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-10-15 23:50:25,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-10-15 23:50:25,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:25,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-10-15 23:50:25,164 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 12 [2022-10-15 23:50:25,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 23:50:25,165 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-10-15 23:50:25,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:25,165 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-10-15 23:50:25,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-15 23:50:25,166 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:50:25,166 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-15 23:50:25,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-15 23:50:25,167 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-15 23:50:25,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:50:25,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1021848305, now seen corresponding path program 1 times [2022-10-15 23:50:25,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:50:25,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373414056] [2022-10-15 23:50:25,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:25,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:50:25,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:25,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 23:50:25,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:50:25,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373414056] [2022-10-15 23:50:25,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373414056] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 23:50:25,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287896527] [2022-10-15 23:50:25,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:25,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 23:50:25,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 23:50:25,258 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 23:50:25,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-15 23:50:25,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:25,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-15 23:50:25,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 23:50:25,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 23:50:25,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 23:50:25,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 23:50:25,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287896527] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 23:50:25,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 23:50:25,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-10-15 23:50:25,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314549399] [2022-10-15 23:50:25,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 23:50:25,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-10-15 23:50:25,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 23:50:25,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-10-15 23:50:25,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2022-10-15 23:50:25,439 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 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 23:50:25,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 23:50:25,680 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2022-10-15 23:50:25,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-15 23:50:25,681 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 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) Word has length 12 [2022-10-15 23:50:25,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 23:50:25,683 INFO L225 Difference]: With dead ends: 100 [2022-10-15 23:50:25,683 INFO L226 Difference]: Without dead ends: 100 [2022-10-15 23:50:25,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=140, Unknown=0, NotChecked=0, Total=240 [2022-10-15 23:50:25,685 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 229 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 23:50:25,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 35 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 23:50:25,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-10-15 23:50:25,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 84. [2022-10-15 23:50:25,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 78 states have (on average 1.3076923076923077) internal successors, (102), 83 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:25,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2022-10-15 23:50:25,696 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 12 [2022-10-15 23:50:25,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 23:50:25,697 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2022-10-15 23:50:25,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 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 23:50:25,697 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2022-10-15 23:50:25,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-10-15 23:50:25,698 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:50:25,698 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1] [2022-10-15 23:50:25,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-15 23:50:25,912 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 23:50:25,913 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-15 23:50:25,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:50:25,915 INFO L85 PathProgramCache]: Analyzing trace with hash -116849082, now seen corresponding path program 2 times [2022-10-15 23:50:25,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:50:25,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468782825] [2022-10-15 23:50:25,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:25,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:50:25,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:26,237 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 23:50:26,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:50:26,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468782825] [2022-10-15 23:50:26,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468782825] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 23:50:26,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342032052] [2022-10-15 23:50:26,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 23:50:26,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 23:50:26,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 23:50:26,242 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 23:50:26,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-15 23:50:26,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 23:50:26,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 23:50:26,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2022-10-15 23:50:26,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 23:50:26,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 23:50:26,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-15 23:50:26,365 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-15 23:50:26,617 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 23:50:26,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 23:50:27,110 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 23:50:27,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342032052] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 23:50:27,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 23:50:27,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 19 [2022-10-15 23:50:27,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269931101] [2022-10-15 23:50:27,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 23:50:27,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-10-15 23:50:27,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 23:50:27,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-10-15 23:50:27,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2022-10-15 23:50:27,116 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:27,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 23:50:27,709 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2022-10-15 23:50:27,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-15 23:50:27,710 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 20 states have internal predecessors, (47), 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 16 [2022-10-15 23:50:27,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 23:50:27,712 INFO L225 Difference]: With dead ends: 92 [2022-10-15 23:50:27,712 INFO L226 Difference]: Without dead ends: 92 [2022-10-15 23:50:27,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2022-10-15 23:50:27,714 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 300 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-15 23:50:27,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 78 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-15 23:50:27,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-10-15 23:50:27,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 82. [2022-10-15 23:50:27,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 78 states have (on average 1.205128205128205) internal successors, (94), 81 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:27,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 94 transitions. [2022-10-15 23:50:27,726 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 94 transitions. Word has length 16 [2022-10-15 23:50:27,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 23:50:27,726 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 94 transitions. [2022-10-15 23:50:27,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:27,727 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 94 transitions. [2022-10-15 23:50:27,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-10-15 23:50:27,728 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:50:27,728 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1] [2022-10-15 23:50:27,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-15 23:50:27,941 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 23:50:27,942 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-15 23:50:27,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:50:27,944 INFO L85 PathProgramCache]: Analyzing trace with hash 396169457, now seen corresponding path program 2 times [2022-10-15 23:50:27,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:50:27,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340312926] [2022-10-15 23:50:27,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:27,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:50:27,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:28,092 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 23:50:28,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:50:28,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340312926] [2022-10-15 23:50:28,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340312926] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 23:50:28,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036309841] [2022-10-15 23:50:28,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 23:50:28,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 23:50:28,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 23:50:28,096 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 23:50:28,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-15 23:50:28,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 23:50:28,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 23:50:28,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-15 23:50:28,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 23:50:28,185 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-15 23:50:28,189 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-15 23:50:28,360 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-10-15 23:50:28,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 23:50:28,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036309841] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 23:50:28,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 23:50:28,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 11 [2022-10-15 23:50:28,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734793065] [2022-10-15 23:50:28,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 23:50:28,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-15 23:50:28,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 23:50:28,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-15 23:50:28,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-10-15 23:50:28,365 INFO L87 Difference]: Start difference. First operand 82 states and 94 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:28,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 23:50:28,433 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2022-10-15 23:50:28,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-15 23:50:28,434 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 24 [2022-10-15 23:50:28,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 23:50:28,437 INFO L225 Difference]: With dead ends: 82 [2022-10-15 23:50:28,437 INFO L226 Difference]: Without dead ends: 82 [2022-10-15 23:50:28,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-10-15 23:50:28,439 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 39 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 23:50:28,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 15 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 23:50:28,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-10-15 23:50:28,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-10-15 23:50:28,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 81 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 23:50:28,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2022-10-15 23:50:28,458 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 24 [2022-10-15 23:50:28,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 23:50:28,461 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2022-10-15 23:50:28,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:28,461 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2022-10-15 23:50:28,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-10-15 23:50:28,463 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:50:28,463 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 23:50:28,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-15 23:50:28,677 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 23:50:28,678 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-15 23:50:28,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:50:28,679 INFO L85 PathProgramCache]: Analyzing trace with hash -285863884, now seen corresponding path program 1 times [2022-10-15 23:50:28,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:50:28,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357925863] [2022-10-15 23:50:28,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:28,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:50:28,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:28,836 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 23:50:28,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:50:28,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357925863] [2022-10-15 23:50:28,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357925863] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 23:50:28,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479671890] [2022-10-15 23:50:28,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:28,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 23:50:28,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 23:50:28,839 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 23:50:28,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-15 23:50:28,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:28,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-15 23:50:28,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 23:50:29,073 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 23:50:29,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 23:50:29,215 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 23:50:29,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479671890] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 23:50:29,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 23:50:29,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-10-15 23:50:29,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372717798] [2022-10-15 23:50:29,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 23:50:29,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-10-15 23:50:29,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 23:50:29,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-10-15 23:50:29,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=341, Unknown=0, NotChecked=0, Total=600 [2022-10-15 23:50:29,218 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:29,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 23:50:29,708 INFO L93 Difference]: Finished difference Result 194 states and 196 transitions. [2022-10-15 23:50:29,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-15 23:50:29,709 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 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 27 [2022-10-15 23:50:29,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 23:50:29,710 INFO L225 Difference]: With dead ends: 194 [2022-10-15 23:50:29,711 INFO L226 Difference]: Without dead ends: 194 [2022-10-15 23:50:29,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=392, Invalid=600, Unknown=0, NotChecked=0, Total=992 [2022-10-15 23:50:29,713 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 472 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 23:50:29,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 56 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 23:50:29,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-10-15 23:50:29,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 170. [2022-10-15 23:50:29,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 166 states have (on average 1.180722891566265) internal successors, (196), 169 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:29,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 196 transitions. [2022-10-15 23:50:29,741 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 196 transitions. Word has length 27 [2022-10-15 23:50:29,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 23:50:29,742 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 196 transitions. [2022-10-15 23:50:29,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:29,742 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 196 transitions. [2022-10-15 23:50:29,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-10-15 23:50:29,744 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:50:29,744 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 23:50:29,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-15 23:50:29,959 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 23:50:29,960 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-15 23:50:29,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:50:29,961 INFO L85 PathProgramCache]: Analyzing trace with hash -997997516, now seen corresponding path program 2 times [2022-10-15 23:50:29,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:50:29,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466018189] [2022-10-15 23:50:29,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:29,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:50:29,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:30,409 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 23:50:30,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:50:30,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466018189] [2022-10-15 23:50:30,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466018189] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 23:50:30,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842925062] [2022-10-15 23:50:30,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 23:50:30,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 23:50:30,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 23:50:30,412 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 23:50:30,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-15 23:50:30,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 23:50:30,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 23:50:30,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 17 conjunts are in the unsatisfiable core [2022-10-15 23:50:30,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 23:50:30,847 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 23:50:30,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 23:50:31,326 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 23:50:31,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842925062] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 23:50:31,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 23:50:31,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 48 [2022-10-15 23:50:31,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076159280] [2022-10-15 23:50:31,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 23:50:31,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-10-15 23:50:31,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 23:50:31,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-10-15 23:50:31,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1027, Invalid=1325, Unknown=0, NotChecked=0, Total=2352 [2022-10-15 23:50:31,331 INFO L87 Difference]: Start difference. First operand 170 states and 196 transitions. Second operand has 49 states, 49 states have (on average 2.836734693877551) internal successors, (139), 48 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:32,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 23:50:32,651 INFO L93 Difference]: Finished difference Result 402 states and 404 transitions. [2022-10-15 23:50:32,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-10-15 23:50:32,652 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.836734693877551) internal successors, (139), 48 states have internal predecessors, (139), 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 51 [2022-10-15 23:50:32,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 23:50:32,654 INFO L225 Difference]: With dead ends: 402 [2022-10-15 23:50:32,654 INFO L226 Difference]: Without dead ends: 402 [2022-10-15 23:50:32,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1552, Invalid=2480, Unknown=0, NotChecked=0, Total=4032 [2022-10-15 23:50:32,658 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 926 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 926 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-15 23:50:32,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [926 Valid, 113 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-15 23:50:32,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-10-15 23:50:32,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 346. [2022-10-15 23:50:32,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 342 states have (on average 1.1812865497076024) internal successors, (404), 345 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:32,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 404 transitions. [2022-10-15 23:50:32,672 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 404 transitions. Word has length 51 [2022-10-15 23:50:32,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 23:50:32,672 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 404 transitions. [2022-10-15 23:50:32,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.836734693877551) internal successors, (139), 48 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:32,673 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 404 transitions. [2022-10-15 23:50:32,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-10-15 23:50:32,675 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:50:32,676 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 23:50:32,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-15 23:50:32,890 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 23:50:32,891 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-15 23:50:32,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:50:32,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1628122164, now seen corresponding path program 3 times [2022-10-15 23:50:32,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:50:32,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032457403] [2022-10-15 23:50:32,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:32,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:50:33,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:34,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 23:50:34,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:50:34,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032457403] [2022-10-15 23:50:34,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032457403] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 23:50:34,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416510021] [2022-10-15 23:50:34,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 23:50:34,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 23:50:34,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 23:50:34,388 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 23:50:34,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-15 23:50:34,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-15 23:50:34,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 23:50:34,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-15 23:50:34,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 23:50:34,502 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-15 23:50:34,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-15 23:50:35,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2022-10-15 23:50:35,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 23:50:35,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2022-10-15 23:50:35,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416510021] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 23:50:35,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 23:50:35,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 4, 4] total 40 [2022-10-15 23:50:35,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313706674] [2022-10-15 23:50:35,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 23:50:35,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-10-15 23:50:35,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 23:50:35,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-10-15 23:50:35,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=1017, Unknown=0, NotChecked=0, Total=1640 [2022-10-15 23:50:35,767 INFO L87 Difference]: Start difference. First operand 346 states and 404 transitions. Second operand has 41 states, 41 states have (on average 2.951219512195122) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:38,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 23:50:38,615 INFO L93 Difference]: Finished difference Result 384 states and 386 transitions. [2022-10-15 23:50:38,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-10-15 23:50:38,619 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.951219512195122) internal successors, (121), 40 states have internal predecessors, (121), 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 99 [2022-10-15 23:50:38,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 23:50:38,625 INFO L225 Difference]: With dead ends: 384 [2022-10-15 23:50:38,625 INFO L226 Difference]: Without dead ends: 384 [2022-10-15 23:50:38,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1832, Invalid=3280, Unknown=0, NotChecked=0, Total=5112 [2022-10-15 23:50:38,629 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 1263 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 473 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1263 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 473 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-15 23:50:38,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1263 Valid, 76 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [473 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-10-15 23:50:38,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-10-15 23:50:38,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 382. [2022-10-15 23:50:38,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 378 states have (on average 1.0158730158730158) internal successors, (384), 381 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:38,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 384 transitions. [2022-10-15 23:50:38,641 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 384 transitions. Word has length 99 [2022-10-15 23:50:38,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 23:50:38,642 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 384 transitions. [2022-10-15 23:50:38,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.951219512195122) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:38,642 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 384 transitions. [2022-10-15 23:50:38,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-10-15 23:50:38,650 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:50:38,650 INFO L195 NwaCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1] [2022-10-15 23:50:38,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-15 23:50:38,861 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 23:50:38,864 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-15 23:50:38,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:50:38,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1007478356, now seen corresponding path program 4 times [2022-10-15 23:50:38,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:50:38,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551584797] [2022-10-15 23:50:38,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:38,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:50:39,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:41,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3267 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2022-10-15 23:50:41,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:50:41,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551584797] [2022-10-15 23:50:41,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551584797] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 23:50:41,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571534943] [2022-10-15 23:50:41,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-15 23:50:41,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 23:50:41,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 23:50:41,378 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 23:50:41,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-15 23:50:41,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-15 23:50:41,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 23:50:41,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 70 conjunts are in the unsatisfiable core [2022-10-15 23:50:41,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 23:50:45,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3267 backedges. 1650 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 23:50:45,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 23:50:48,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3267 backedges. 1650 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 23:50:48,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571534943] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 23:50:48,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 23:50:48,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 71, 71] total 140 [2022-10-15 23:50:48,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523077325] [2022-10-15 23:50:48,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 23:50:48,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-10-15 23:50:48,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 23:50:48,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-10-15 23:50:48,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3185, Invalid=16275, Unknown=0, NotChecked=0, Total=19460 [2022-10-15 23:50:48,965 INFO L87 Difference]: Start difference. First operand 382 states and 384 transitions. Second operand has 140 states, 140 states have (on average 2.9357142857142855) internal successors, (411), 140 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:51,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 23:50:51,994 INFO L93 Difference]: Finished difference Result 400 states and 402 transitions. [2022-10-15 23:50:51,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-10-15 23:50:51,995 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.9357142857142855) internal successors, (411), 140 states have internal predecessors, (411), 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 204 [2022-10-15 23:50:51,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 23:50:51,997 INFO L225 Difference]: With dead ends: 400 [2022-10-15 23:50:51,998 INFO L226 Difference]: Without dead ends: 400 [2022-10-15 23:50:52,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 269 SyntacticMatches, 35 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11066 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=5004, Invalid=25098, Unknown=0, NotChecked=0, Total=30102 [2022-10-15 23:50:52,008 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 1619 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 512 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1619 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 512 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-15 23:50:52,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1619 Valid, 170 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [512 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-15 23:50:52,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-10-15 23:50:52,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 390. [2022-10-15 23:50:52,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 386 states have (on average 1.0155440414507773) internal successors, (392), 389 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:52,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 392 transitions. [2022-10-15 23:50:52,018 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 392 transitions. Word has length 204 [2022-10-15 23:50:52,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 23:50:52,019 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 392 transitions. [2022-10-15 23:50:52,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.9357142857142855) internal successors, (411), 140 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:52,020 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 392 transitions. [2022-10-15 23:50:52,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-10-15 23:50:52,024 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:50:52,024 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 34, 34, 33, 33, 1, 1, 1, 1, 1] [2022-10-15 23:50:52,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-10-15 23:50:52,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-10-15 23:50:52,240 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-15 23:50:52,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:50:52,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1003631668, now seen corresponding path program 5 times [2022-10-15 23:50:52,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:50:52,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305527929] [2022-10-15 23:50:52,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:52,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:50:52,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:54,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2022-10-15 23:50:54,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:50:54,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305527929] [2022-10-15 23:50:54,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305527929] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 23:50:54,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780342528] [2022-10-15 23:50:54,419 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-10-15 23:50:54,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 23:50:54,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 23:50:54,420 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 23:50:54,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process