/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_tripl_access_init_const.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 23:50:19,613 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 23:50:19,616 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 23:50:19,677 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-10-15 23:50:19,779 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 23:50:19,842 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 23:50:19,842 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 23:50:19,843 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 23:50:19,843 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 23:50:19,845 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 23:50:19,845 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 23:50:19,848 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 23:50:19,849 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 23:50:19,849 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 23:50:19,850 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 23:50:19,851 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 23:50:19,851 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 23:50:19,851 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 23:50:19,852 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 23:50:19,852 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 23:50:19,852 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 23:50:19,852 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 23:50:19,852 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 23:50:19,853 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 23:50:19,853 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 23:50:19,853 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 23:50:19,853 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 23:50:19,854 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 23:50:19,854 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 23:50:19,854 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 23:50:19,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 23:50:19,855 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 23:50:19,855 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 23:50:19,855 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 23:50:19,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 23:50:19,855 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 23:50:20,308 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 23:50:20,345 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 23:50:20,348 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 23:50:20,350 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 23:50:20,351 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 23:50:20,354 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_tripl_access_init_const.c [2022-10-15 23:50:20,447 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88a633ac1/d8e41f06601749fda2c6c61dcee20821/FLAG957726557 [2022-10-15 23:50:21,101 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 23:50:21,101 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_tripl_access_init_const.c [2022-10-15 23:50:21,108 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88a633ac1/d8e41f06601749fda2c6c61dcee20821/FLAG957726557 [2022-10-15 23:50:21,470 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88a633ac1/d8e41f06601749fda2c6c61dcee20821 [2022-10-15 23:50:21,474 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 23:50:21,483 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 23:50:21,492 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 23:50:21,493 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 23:50:21,501 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 23:50:21,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 11:50:21" (1/1) ... [2022-10-15 23:50:21,505 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15228a31 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 23:50:21,505 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 11:50:21" (1/1) ... [2022-10-15 23:50:21,515 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 23:50:21,538 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 23:50:21,741 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_tripl_access_init_const.c[420,433] [2022-10-15 23:50:21,771 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 23:50:21,783 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 23:50:21,806 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_tripl_access_init_const.c[420,433] [2022-10-15 23:50:21,828 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 23:50:21,855 INFO L208 MainTranslator]: Completed translation [2022-10-15 23:50:21,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:50:21 WrapperNode [2022-10-15 23:50:21,858 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 23:50:21,860 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 23:50:21,861 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 23:50:21,861 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 23:50:21,872 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 23:50:21,884 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 23:50:21,917 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 46 [2022-10-15 23:50:21,918 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 23:50:21,920 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 23:50:21,921 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 23:50:21,921 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 23:50:21,935 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 23:50:21,936 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 23:50:21,952 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 23:50:21,953 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 23:50:21,970 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 23:50:21,983 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 23:50:21,985 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 23:50:21,987 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 23:50:21,990 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 23:50:21,992 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 23:50:21,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 23:50:21,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 23:50:21,994 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 23:50:22,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 23:50:22,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 23:50:22,039 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-15 23:50:22,064 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 23:50:22,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 23:50:22,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 23:50:22,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 23:50:22,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 23:50:22,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 23:50:22,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 23:50:22,126 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 23:50:22,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 23:50:22,220 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 23:50:22,223 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 23:50:22,484 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 23:50:22,500 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 23:50:22,500 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-10-15 23:50:22,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 11:50:22 BoogieIcfgContainer [2022-10-15 23:50:22,504 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 23:50:22,507 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 23:50:22,508 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 23:50:22,512 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 23:50:22,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 11:50:21" (1/3) ... [2022-10-15 23:50:22,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@211a952e 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 23:50:22,514 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 23:50:22,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@211a952e 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 23:50:22,515 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 23:50:22,517 INFO L112 eAbstractionObserver]: Analyzing ICFG array_tripl_access_init_const.c [2022-10-15 23:50:22,550 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 23:50:22,550 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-10-15 23:50:22,775 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 23:50:22,787 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;@4bf0b32a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 23:50:22,788 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2022-10-15 23:50:22,795 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 28 states have internal predecessors, (33), 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 23:50:22,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 23:50:22,805 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:50:22,805 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 23:50:22,807 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 23:50:22,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:50:22,815 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2022-10-15 23:50:22,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:50:22,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800430997] [2022-10-15 23:50:22,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:22,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:50:22,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:23,112 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 23:50:23,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:50:23,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800430997] [2022-10-15 23:50:23,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800430997] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 23:50:23,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 23:50:23,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 23:50:23,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744801061] [2022-10-15 23:50:23,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 23:50:23,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 23:50:23,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 23:50:23,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 23:50:23,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 23:50:23,189 INFO L87 Difference]: Start difference. First operand has 29 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 28 states have internal predecessors, (33), 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 23:50:23,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 23:50:23,251 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2022-10-15 23:50:23,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 23:50:23,255 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 23:50:23,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 23:50:23,265 INFO L225 Difference]: With dead ends: 25 [2022-10-15 23:50:23,265 INFO L226 Difference]: Without dead ends: 23 [2022-10-15 23:50:23,267 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 23:50:23,272 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 19 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 23:50:23,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 18 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 23:50:23,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-10-15 23:50:23,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-10-15 23:50:23,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.411764705882353) internal successors, (24), 22 states have internal predecessors, (24), 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 23:50:23,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2022-10-15 23:50:23,320 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 4 [2022-10-15 23:50:23,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 23:50:23,321 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2022-10-15 23:50:23,322 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 23:50:23,322 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2022-10-15 23:50:23,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 23:50:23,322 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:50:23,323 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 23:50:23,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 23:50:23,324 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 23:50:23,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:50:23,325 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2022-10-15 23:50:23,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:50:23,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522345550] [2022-10-15 23:50:23,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:23,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:50:23,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:23,598 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 23:50:23,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:50:23,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522345550] [2022-10-15 23:50:23,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522345550] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 23:50:23,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 23:50:23,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-15 23:50:23,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273888174] [2022-10-15 23:50:23,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 23:50:23,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 23:50:23,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 23:50:23,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 23:50:23,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 23:50:23,607 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:23,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 23:50:23,744 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2022-10-15 23:50:23,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 23:50:23,746 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-15 23:50:23,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 23:50:23,747 INFO L225 Difference]: With dead ends: 28 [2022-10-15 23:50:23,748 INFO L226 Difference]: Without dead ends: 28 [2022-10-15 23:50:23,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 23:50:23,759 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 23:50:23,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 31 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 23:50:23,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-10-15 23:50:23,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-10-15 23:50:23,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 26 states have internal predecessors, (28), 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 23:50:23,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-10-15 23:50:23,781 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 4 [2022-10-15 23:50:23,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 23:50:23,783 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-10-15 23:50:23,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:23,784 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-10-15 23:50:23,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-15 23:50:23,785 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:50:23,785 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 23:50:23,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 23:50:23,786 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 23:50:23,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:50:23,789 INFO L85 PathProgramCache]: Analyzing trace with hash -392381007, now seen corresponding path program 1 times [2022-10-15 23:50:23,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:50:23,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080688234] [2022-10-15 23:50:23,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:23,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:50:23,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:24,107 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 23:50:24,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:50:24,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080688234] [2022-10-15 23:50:24,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080688234] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 23:50:24,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193306774] [2022-10-15 23:50:24,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:24,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 23:50:24,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 23:50:24,113 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 23:50:24,140 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 23:50:24,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:24,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-15 23:50:24,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 23:50:24,316 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 23:50:24,423 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 23:50:24,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 23:50:24,540 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 23:50:24,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193306774] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 23:50:24,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 23:50:24,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2022-10-15 23:50:24,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937522436] [2022-10-15 23:50:24,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 23:50:24,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-15 23:50:24,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 23:50:24,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-15 23:50:24,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-10-15 23:50:24,545 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:24,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 23:50:24,752 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2022-10-15 23:50:24,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 23:50:24,753 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-10-15 23:50:24,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 23:50:24,756 INFO L225 Difference]: With dead ends: 42 [2022-10-15 23:50:24,756 INFO L226 Difference]: Without dead ends: 42 [2022-10-15 23:50:24,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-10-15 23:50:24,759 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 24 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 23:50:24,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 23:50:24,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-10-15 23:50:24,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2022-10-15 23:50:24,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 39 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 23:50:24,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-10-15 23:50:24,769 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 9 [2022-10-15 23:50:24,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 23:50:24,770 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-10-15 23:50:24,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:24,770 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-10-15 23:50:24,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-10-15 23:50:24,771 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:50:24,772 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-15 23:50:24,814 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 23:50:24,986 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 23:50:24,987 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-15 23:50:24,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:50:24,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1279794665, now seen corresponding path program 1 times [2022-10-15 23:50:24,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:50:24,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582727489] [2022-10-15 23:50:24,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:24,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:50:25,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:25,291 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 23:50:25,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:50:25,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582727489] [2022-10-15 23:50:25,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582727489] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 23:50:25,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218798498] [2022-10-15 23:50:25,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:25,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 23:50:25,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 23:50:25,294 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 23:50:25,305 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 23:50:25,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:25,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-15 23:50:25,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 23:50:25,460 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 23:50:25,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 23:50:25,526 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 23:50:25,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218798498] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 23:50:25,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 23:50:25,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2022-10-15 23:50:25,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126449553] [2022-10-15 23:50:25,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 23:50:25,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-15 23:50:25,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 23:50:25,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-15 23:50:25,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-10-15 23:50:25,530 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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 23:50:25,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 23:50:25,766 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2022-10-15 23:50:25,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-15 23:50:25,767 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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) Word has length 16 [2022-10-15 23:50:25,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 23:50:25,769 INFO L225 Difference]: With dead ends: 63 [2022-10-15 23:50:25,769 INFO L226 Difference]: Without dead ends: 63 [2022-10-15 23:50:25,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2022-10-15 23:50:25,771 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 94 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 23:50:25,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 40 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 23:50:25,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-10-15 23:50:25,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2022-10-15 23:50:25,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 45 states have (on average 1.288888888888889) internal successors, (58), 50 states have internal predecessors, (58), 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 23:50:25,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2022-10-15 23:50:25,779 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 16 [2022-10-15 23:50:25,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 23:50:25,780 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2022-10-15 23:50:25,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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 23:50:25,781 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2022-10-15 23:50:25,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-15 23:50:25,781 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:50:25,782 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1] [2022-10-15 23:50:25,823 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 23:50:25,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-10-15 23:50:25,998 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 23:50:25,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:50:26,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1006107425, now seen corresponding path program 1 times [2022-10-15 23:50:26,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:50:26,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721673355] [2022-10-15 23:50:26,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:26,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:50:26,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:26,254 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 23:50:26,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:50:26,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721673355] [2022-10-15 23:50:26,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721673355] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 23:50:26,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955937367] [2022-10-15 23:50:26,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:26,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 23:50:26,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 23:50:26,257 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 23:50:26,269 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 23:50:26,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:26,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-15 23:50:26,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 23:50:26,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 23:50:26,639 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 23:50:26,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 23:50:26,910 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 23:50:26,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955937367] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 23:50:26,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 23:50:26,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2022-10-15 23:50:26,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296411521] [2022-10-15 23:50:26,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 23:50:26,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-15 23:50:26,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 23:50:26,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-15 23:50:26,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2022-10-15 23:50:26,914 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 17 states, 16 states have (on average 3.625) internal successors, (58), 17 states have internal predecessors, (58), 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 23:50:27,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 23:50:27,317 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2022-10-15 23:50:27,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-15 23:50:27,318 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-10-15 23:50:27,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 23:50:27,319 INFO L225 Difference]: With dead ends: 69 [2022-10-15 23:50:27,320 INFO L226 Difference]: Without dead ends: 69 [2022-10-15 23:50:27,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=321, Unknown=0, NotChecked=0, Total=506 [2022-10-15 23:50:27,322 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 67 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 23:50:27,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 70 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 23:50:27,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-10-15 23:50:27,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2022-10-15 23:50:27,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 62 states have internal predecessors, (71), 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 23:50:27,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2022-10-15 23:50:27,331 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 20 [2022-10-15 23:50:27,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 23:50:27,331 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2022-10-15 23:50:27,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 17 states have internal predecessors, (58), 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 23:50:27,332 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2022-10-15 23:50:27,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-10-15 23:50:27,333 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:50:27,333 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1] [2022-10-15 23:50:27,380 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 23:50:27,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 23:50:27,547 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 23:50:27,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:50:27,548 INFO L85 PathProgramCache]: Analyzing trace with hash 994008582, now seen corresponding path program 2 times [2022-10-15 23:50:27,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:50:27,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476454405] [2022-10-15 23:50:27,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:27,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:50:27,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:27,897 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 23:50:27,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:50:27,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476454405] [2022-10-15 23:50:27,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476454405] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 23:50:27,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119187672] [2022-10-15 23:50:27,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 23:50:27,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 23:50:27,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 23:50:27,900 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 23:50:27,907 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 23:50:27,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 23:50:27,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 23:50:27,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-15 23:50:27,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 23:50:27,991 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 23:50:28,205 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 23:50:28,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 23:50:28,440 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 23:50:28,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119187672] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 23:50:28,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 23:50:28,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2022-10-15 23:50:28,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603493523] [2022-10-15 23:50:28,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 23:50:28,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-10-15 23:50:28,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 23:50:28,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-10-15 23:50:28,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2022-10-15 23:50:28,443 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 18 states, 17 states have (on average 4.117647058823529) internal successors, (70), 18 states have internal predecessors, (70), 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 23:50:29,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 23:50:29,057 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2022-10-15 23:50:29,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-15 23:50:29,058 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.117647058823529) internal successors, (70), 18 states have internal predecessors, (70), 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 23:50:29,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 23:50:29,058 INFO L225 Difference]: With dead ends: 76 [2022-10-15 23:50:29,059 INFO L226 Difference]: Without dead ends: 76 [2022-10-15 23:50:29,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2022-10-15 23:50:29,060 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 46 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 23:50:29,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 46 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 23:50:29,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-10-15 23:50:29,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2022-10-15 23:50:29,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 71 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:29,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2022-10-15 23:50:29,070 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 24 [2022-10-15 23:50:29,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 23:50:29,071 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2022-10-15 23:50:29,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.117647058823529) internal successors, (70), 18 states have internal predecessors, (70), 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 23:50:29,071 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2022-10-15 23:50:29,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-10-15 23:50:29,072 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:50:29,073 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 23:50:29,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-10-15 23:50:29,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 23:50:29,289 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-15 23:50:29,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:50:29,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1058371021, now seen corresponding path program 1 times [2022-10-15 23:50:29,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:50:29,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679950041] [2022-10-15 23:50:29,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:29,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:50:29,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:29,447 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-10-15 23:50:29,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:50:29,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679950041] [2022-10-15 23:50:29,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679950041] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 23:50:29,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 23:50:29,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-15 23:50:29,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314489318] [2022-10-15 23:50:29,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 23:50:29,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 23:50:29,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 23:50:29,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 23:50:29,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 23:50:29,451 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:29,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 23:50:29,487 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2022-10-15 23:50:29,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 23:50:29,488 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-10-15 23:50:29,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 23:50:29,489 INFO L225 Difference]: With dead ends: 78 [2022-10-15 23:50:29,489 INFO L226 Difference]: Without dead ends: 78 [2022-10-15 23:50:29,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 23:50:29,491 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 27 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 23:50:29,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 23 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 23:50:29,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-10-15 23:50:29,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2022-10-15 23:50:29,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 71 states have internal predecessors, (77), 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 23:50:29,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2022-10-15 23:50:29,499 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 37 [2022-10-15 23:50:29,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 23:50:29,499 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2022-10-15 23:50:29,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:29,500 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2022-10-15 23:50:29,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-10-15 23:50:29,501 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:50:29,501 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 23:50:29,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-15 23:50:29,502 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-15 23:50:29,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:50:29,503 INFO L85 PathProgramCache]: Analyzing trace with hash -811432974, now seen corresponding path program 1 times [2022-10-15 23:50:29,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:50:29,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911915497] [2022-10-15 23:50:29,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:29,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:50:29,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:29,741 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 23:50:29,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:50:29,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911915497] [2022-10-15 23:50:29,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911915497] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 23:50:29,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303411941] [2022-10-15 23:50:29,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:29,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 23:50:29,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 23:50:29,746 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 23:50:29,750 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 23:50:29,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:29,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-15 23:50:29,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 23:50:30,050 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 23:50:30,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 23:50:30,192 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 23:50:30,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303411941] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 23:50:30,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 23:50:30,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-10-15 23:50:30,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116396464] [2022-10-15 23:50:30,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 23:50:30,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-10-15 23:50:30,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 23:50:30,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-10-15 23:50:30,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=268, Unknown=0, NotChecked=0, Total=506 [2022-10-15 23:50:30,196 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand has 23 states, 23 states have (on average 4.478260869565218) internal successors, (103), 23 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:30,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 23:50:30,364 INFO L93 Difference]: Finished difference Result 102 states and 103 transitions. [2022-10-15 23:50:30,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-15 23:50:30,364 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.478260869565218) internal successors, (103), 23 states have internal predecessors, (103), 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 39 [2022-10-15 23:50:30,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 23:50:30,366 INFO L225 Difference]: With dead ends: 102 [2022-10-15 23:50:30,366 INFO L226 Difference]: Without dead ends: 102 [2022-10-15 23:50:30,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=238, Invalid=268, Unknown=0, NotChecked=0, Total=506 [2022-10-15 23:50:30,367 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 136 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 23:50:30,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 48 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 23:50:30,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-10-15 23:50:30,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 91. [2022-10-15 23:50:30,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 85 states have (on average 1.2117647058823529) internal successors, (103), 90 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:30,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2022-10-15 23:50:30,395 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 39 [2022-10-15 23:50:30,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 23:50:30,396 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2022-10-15 23:50:30,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.478260869565218) internal successors, (103), 23 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:30,396 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2022-10-15 23:50:30,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-10-15 23:50:30,400 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:50:30,401 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1] [2022-10-15 23:50:30,442 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 23:50:30,601 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 23:50:30,602 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 23:50:30,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:50:30,603 INFO L85 PathProgramCache]: Analyzing trace with hash 66220993, now seen corresponding path program 2 times [2022-10-15 23:50:30,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:50:30,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304182954] [2022-10-15 23:50:30,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:30,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:50:30,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:31,288 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 23:50:31,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:50:31,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304182954] [2022-10-15 23:50:31,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304182954] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 23:50:31,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834805069] [2022-10-15 23:50:31,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 23:50:31,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 23:50:31,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 23:50:31,291 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 23:50:31,300 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 23:50:31,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 23:50:31,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 23:50:31,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-15 23:50:31,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 23:50:31,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 23:50:31,964 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 23:50:31,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 23:50:32,755 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 23:50:32,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834805069] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 23:50:32,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 23:50:32,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2022-10-15 23:50:32,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129785066] [2022-10-15 23:50:32,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 23:50:32,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-10-15 23:50:32,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 23:50:32,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-10-15 23:50:32,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=750, Unknown=0, NotChecked=0, Total=1190 [2022-10-15 23:50:32,760 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand has 35 states, 34 states have (on average 4.352941176470588) internal successors, (148), 35 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:33,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 23:50:33,787 INFO L93 Difference]: Finished difference Result 139 states and 146 transitions. [2022-10-15 23:50:33,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-10-15 23:50:33,788 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 4.352941176470588) internal successors, (148), 35 states have internal predecessors, (148), 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 50 [2022-10-15 23:50:33,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 23:50:33,790 INFO L225 Difference]: With dead ends: 139 [2022-10-15 23:50:33,790 INFO L226 Difference]: Without dead ends: 139 [2022-10-15 23:50:33,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=935, Invalid=1821, Unknown=0, NotChecked=0, Total=2756 [2022-10-15 23:50:33,793 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 235 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-15 23:50:33,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 46 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-15 23:50:33,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-10-15 23:50:33,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 123. [2022-10-15 23:50:33,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 117 states have (on average 1.1965811965811965) internal successors, (140), 122 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:33,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 140 transitions. [2022-10-15 23:50:33,803 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 140 transitions. Word has length 50 [2022-10-15 23:50:33,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 23:50:33,803 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 140 transitions. [2022-10-15 23:50:33,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 4.352941176470588) internal successors, (148), 35 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:33,804 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 140 transitions. [2022-10-15 23:50:33,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-10-15 23:50:33,805 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:50:33,805 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1] [2022-10-15 23:50:33,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-15 23:50:34,019 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 23:50:34,020 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-15 23:50:34,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:50:34,021 INFO L85 PathProgramCache]: Analyzing trace with hash 437028518, now seen corresponding path program 3 times [2022-10-15 23:50:34,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:50:34,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361082887] [2022-10-15 23:50:34,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:34,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:50:34,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 23:50:34,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:50:34,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361082887] [2022-10-15 23:50:34,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361082887] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 23:50:34,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711618236] [2022-10-15 23:50:34,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 23:50:34,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 23:50:34,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 23:50:34,796 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 23:50:34,797 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 23:50:34,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-15 23:50:34,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 23:50:34,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-15 23:50:34,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 23:50:34,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 23:50:35,235 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 37 proven. 10 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-10-15 23:50:35,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 23:50:35,652 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-10-15 23:50:35,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711618236] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 23:50:35,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 23:50:35,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 21 [2022-10-15 23:50:35,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534131696] [2022-10-15 23:50:35,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 23:50:35,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-10-15 23:50:35,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 23:50:35,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-10-15 23:50:35,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2022-10-15 23:50:35,655 INFO L87 Difference]: Start difference. First operand 123 states and 140 transitions. Second operand has 22 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 22 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:36,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 23:50:36,136 INFO L93 Difference]: Finished difference Result 128 states and 135 transitions. [2022-10-15 23:50:36,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-15 23:50:36,136 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 22 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-10-15 23:50:36,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 23:50:36,138 INFO L225 Difference]: With dead ends: 128 [2022-10-15 23:50:36,138 INFO L226 Difference]: Without dead ends: 128 [2022-10-15 23:50:36,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2022-10-15 23:50:36,139 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 161 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-15 23:50:36,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 43 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-15 23:50:36,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-10-15 23:50:36,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 122. [2022-10-15 23:50:36,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 117 states have (on average 1.1025641025641026) internal successors, (129), 121 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:36,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 129 transitions. [2022-10-15 23:50:36,147 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 129 transitions. Word has length 54 [2022-10-15 23:50:36,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 23:50:36,147 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 129 transitions. [2022-10-15 23:50:36,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 22 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:36,148 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 129 transitions. [2022-10-15 23:50:36,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-10-15 23:50:36,149 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:50:36,149 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 23:50:36,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-15 23:50:36,363 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 23:50:36,364 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-15 23:50:36,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:50:36,365 INFO L85 PathProgramCache]: Analyzing trace with hash -623462286, now seen corresponding path program 2 times [2022-10-15 23:50:36,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:50:36,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911712092] [2022-10-15 23:50:36,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:36,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:50:36,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:37,067 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 23:50:37,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:50:37,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911712092] [2022-10-15 23:50:37,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911712092] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 23:50:37,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950478207] [2022-10-15 23:50:37,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 23:50:37,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 23:50:37,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 23:50:37,074 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 23:50:37,098 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 23:50:37,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 23:50:37,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 23:50:37,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 17 conjunts are in the unsatisfiable core [2022-10-15 23:50:37,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 23:50:37,638 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 23:50:37,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 23:50:38,132 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 23:50:38,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950478207] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 23:50:38,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 23:50:38,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 47 [2022-10-15 23:50:38,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256195591] [2022-10-15 23:50:38,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 23:50:38,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-10-15 23:50:38,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 23:50:38,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-10-15 23:50:38,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=1172, Unknown=0, NotChecked=0, Total=2162 [2022-10-15 23:50:38,138 INFO L87 Difference]: Start difference. First operand 122 states and 129 transitions. Second operand has 47 states, 47 states have (on average 4.74468085106383) internal successors, (223), 47 states have internal predecessors, (223), 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 23:50:38,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 23:50:38,463 INFO L93 Difference]: Finished difference Result 189 states and 190 transitions. [2022-10-15 23:50:38,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-10-15 23:50:38,464 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 4.74468085106383) internal successors, (223), 47 states have internal predecessors, (223), 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 79 [2022-10-15 23:50:38,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 23:50:38,465 INFO L225 Difference]: With dead ends: 189 [2022-10-15 23:50:38,465 INFO L226 Difference]: Without dead ends: 189 [2022-10-15 23:50:38,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=990, Invalid=1172, Unknown=0, NotChecked=0, Total=2162 [2022-10-15 23:50:38,468 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 214 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 23:50:38,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 80 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 23:50:38,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-10-15 23:50:38,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 170. [2022-10-15 23:50:38,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.1515151515151516) internal successors, (190), 169 states have internal predecessors, (190), 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 23:50:38,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 190 transitions. [2022-10-15 23:50:38,476 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 190 transitions. Word has length 79 [2022-10-15 23:50:38,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 23:50:38,477 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 190 transitions. [2022-10-15 23:50:38,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 4.74468085106383) internal successors, (223), 47 states have internal predecessors, (223), 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 23:50:38,478 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 190 transitions. [2022-10-15 23:50:38,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-10-15 23:50:38,479 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:50:38,479 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 19, 19, 1, 1, 1] [2022-10-15 23:50:38,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-15 23:50:38,693 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 23:50:38,694 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-15 23:50:38,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:50:38,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1159303636, now seen corresponding path program 1 times [2022-10-15 23:50:38,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:50:38,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124343689] [2022-10-15 23:50:38,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:38,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:50:38,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:40,041 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 0 proven. 931 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 23:50:40,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:50:40,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124343689] [2022-10-15 23:50:40,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124343689] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 23:50:40,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346573998] [2022-10-15 23:50:40,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:40,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 23:50:40,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 23:50:40,044 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 23:50:40,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-15 23:50:40,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:40,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 26 conjunts are in the unsatisfiable core [2022-10-15 23:50:40,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 23:50:40,256 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 23:50:41,406 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 0 proven. 931 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 23:50:41,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 23:50:43,436 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 0 proven. 931 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 23:50:43,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346573998] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 23:50:43,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 23:50:43,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 64 [2022-10-15 23:50:43,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215307101] [2022-10-15 23:50:43,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 23:50:43,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-10-15 23:50:43,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 23:50:43,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-10-15 23:50:43,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1565, Invalid=2595, Unknown=0, NotChecked=0, Total=4160 [2022-10-15 23:50:43,445 INFO L87 Difference]: Start difference. First operand 170 states and 190 transitions. Second operand has 65 states, 64 states have (on average 4.703125) internal successors, (301), 65 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:46,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 23:50:46,015 INFO L93 Difference]: Finished difference Result 253 states and 264 transitions. [2022-10-15 23:50:46,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-10-15 23:50:46,016 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 4.703125) internal successors, (301), 65 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2022-10-15 23:50:46,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 23:50:46,018 INFO L225 Difference]: With dead ends: 253 [2022-10-15 23:50:46,018 INFO L226 Difference]: Without dead ends: 253 [2022-10-15 23:50:46,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3465, Invalid=7041, Unknown=0, NotChecked=0, Total=10506 [2022-10-15 23:50:46,021 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 446 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-15 23:50:46,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 52 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-15 23:50:46,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-10-15 23:50:46,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 223. [2022-10-15 23:50:46,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.165137614678899) internal successors, (254), 222 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:46,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 254 transitions. [2022-10-15 23:50:46,029 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 254 transitions. Word has length 101 [2022-10-15 23:50:46,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 23:50:46,029 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 254 transitions. [2022-10-15 23:50:46,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 4.703125) internal successors, (301), 65 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 23:50:46,030 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 254 transitions. [2022-10-15 23:50:46,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-10-15 23:50:46,031 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 23:50:46,031 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 20, 1, 1, 1] [2022-10-15 23:50:46,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-15 23:50:46,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 23:50:46,246 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-10-15 23:50:46,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 23:50:46,247 INFO L85 PathProgramCache]: Analyzing trace with hash 394398604, now seen corresponding path program 3 times [2022-10-15 23:50:46,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 23:50:46,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848540772] [2022-10-15 23:50:46,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 23:50:46,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 23:50:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 23:50:47,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 0 proven. 1010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 23:50:47,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 23:50:47,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848540772] [2022-10-15 23:50:47,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848540772] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 23:50:47,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567280556] [2022-10-15 23:50:47,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 23:50:47,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 23:50:47,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 23:50:47,856 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 23:50:47,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process