/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-16 00:10:34,588 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-16 00:10:34,592 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-16 00:10:34,632 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-10-16 00:10:34,711 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 [2022-10-16 00:10:34,747 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-16 00:10:34,748 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-16 00:10:34,748 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-16 00:10:34,749 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-16 00:10:34,750 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-16 00:10:34,750 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-16 00:10:34,751 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-16 00:10:34,752 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-16 00:10:34,752 INFO L138 SettingsManager]: * Use SBE=true [2022-10-16 00:10:34,753 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-16 00:10:34,753 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-16 00:10:34,753 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-16 00:10:34,754 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-16 00:10:34,754 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-16 00:10:34,754 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-16 00:10:34,755 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-16 00:10:34,755 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-16 00:10:34,755 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-16 00:10:34,756 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-16 00:10:34,756 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-16 00:10:34,756 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-16 00:10:34,757 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-16 00:10:34,757 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-16 00:10:34,758 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-16 00:10:34,758 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-16 00:10:34,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 00:10:34,759 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-16 00:10:34,759 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-16 00:10:34,760 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-16 00:10:34,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-16 00:10:34,760 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-16 00:10:35,205 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-16 00:10:35,259 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-16 00:10:35,263 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-16 00:10:35,266 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-16 00:10:35,267 INFO L275 PluginConnector]: CDTParser initialized [2022-10-16 00:10:35,270 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c [2022-10-16 00:10:35,385 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74497b313/3629f259aed64e85b0623aad40f6343d/FLAGfd691fdd2 [2022-10-16 00:10:36,114 INFO L306 CDTParser]: Found 1 translation units. [2022-10-16 00:10:36,115 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c [2022-10-16 00:10:36,128 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74497b313/3629f259aed64e85b0623aad40f6343d/FLAGfd691fdd2 [2022-10-16 00:10:36,452 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74497b313/3629f259aed64e85b0623aad40f6343d [2022-10-16 00:10:36,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-16 00:10:36,468 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-16 00:10:36,473 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-16 00:10:36,473 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-16 00:10:36,479 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-16 00:10:36,481 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 12:10:36" (1/1) ... [2022-10-16 00:10:36,483 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71a6b588 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:10:36, skipping insertion in model container [2022-10-16 00:10:36,483 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 12:10:36" (1/1) ... [2022-10-16 00:10:36,494 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-16 00:10:36,516 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-16 00:10:36,703 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c[342,355] [2022-10-16 00:10:36,746 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 00:10:36,765 INFO L203 MainTranslator]: Completed pre-run [2022-10-16 00:10:36,792 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c[342,355] [2022-10-16 00:10:36,851 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 00:10:36,882 INFO L208 MainTranslator]: Completed translation [2022-10-16 00:10:36,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:10:36 WrapperNode [2022-10-16 00:10:36,891 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-16 00:10:36,894 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-16 00:10:36,895 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-16 00:10:36,895 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-16 00:10:36,908 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:10:36" (1/1) ... [2022-10-16 00:10:36,935 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:10:36" (1/1) ... [2022-10-16 00:10:37,009 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 131 [2022-10-16 00:10:37,010 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-16 00:10:37,011 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-16 00:10:37,012 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-16 00:10:37,012 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-16 00:10:37,031 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:10:36" (1/1) ... [2022-10-16 00:10:37,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:10:36" (1/1) ... [2022-10-16 00:10:37,054 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:10:36" (1/1) ... [2022-10-16 00:10:37,055 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:10:36" (1/1) ... [2022-10-16 00:10:37,080 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:10:36" (1/1) ... [2022-10-16 00:10:37,097 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:10:36" (1/1) ... [2022-10-16 00:10:37,106 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:10:36" (1/1) ... [2022-10-16 00:10:37,108 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:10:36" (1/1) ... [2022-10-16 00:10:37,115 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-16 00:10:37,122 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-16 00:10:37,122 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-16 00:10:37,122 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-16 00:10:37,123 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:10:36" (1/1) ... [2022-10-16 00:10:37,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 00:10:37,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 00:10:37,181 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) [2022-10-16 00:10:37,186 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 [2022-10-16 00:10:37,263 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-16 00:10:37,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-16 00:10:37,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-16 00:10:37,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-16 00:10:37,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-16 00:10:37,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-16 00:10:37,265 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-16 00:10:37,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-16 00:10:37,382 INFO L235 CfgBuilder]: Building ICFG [2022-10-16 00:10:37,386 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-16 00:10:37,998 INFO L276 CfgBuilder]: Performing block encoding [2022-10-16 00:10:38,020 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-16 00:10:38,021 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-10-16 00:10:38,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 12:10:38 BoogieIcfgContainer [2022-10-16 00:10:38,026 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-16 00:10:38,034 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-16 00:10:38,034 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-16 00:10:38,041 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-16 00:10:38,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 12:10:36" (1/3) ... [2022-10-16 00:10:38,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f137338 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 12:10:38, skipping insertion in model container [2022-10-16 00:10:38,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:10:36" (2/3) ... [2022-10-16 00:10:38,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f137338 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 12:10:38, skipping insertion in model container [2022-10-16 00:10:38,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 12:10:38" (3/3) ... [2022-10-16 00:10:38,050 INFO L112 eAbstractionObserver]: Analyzing ICFG check_removal_from_set_after_insertion.c [2022-10-16 00:10:38,086 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-16 00:10:38,087 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2022-10-16 00:10:38,201 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-16 00:10:38,217 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;@27ae8550, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-16 00:10:38,218 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2022-10-16 00:10:38,241 INFO L276 IsEmpty]: Start isEmpty. Operand has 70 states, 47 states have (on average 1.851063829787234) internal successors, (87), 69 states have internal predecessors, (87), 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) [2022-10-16 00:10:38,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-16 00:10:38,268 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:10:38,269 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-16 00:10:38,271 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-16 00:10:38,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:10:38,283 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2022-10-16 00:10:38,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:10:38,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169082731] [2022-10-16 00:10:38,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:10:38,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:10:38,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:10:38,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:10:38,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:10:38,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169082731] [2022-10-16 00:10:38,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169082731] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 00:10:38,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 00:10:38,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 00:10:38,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107464468] [2022-10-16 00:10:38,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 00:10:38,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 00:10:38,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:10:38,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 00:10:38,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 00:10:38,921 INFO L87 Difference]: Start difference. First operand has 70 states, 47 states have (on average 1.851063829787234) internal successors, (87), 69 states have internal predecessors, (87), 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) [2022-10-16 00:10:39,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:10:39,032 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2022-10-16 00:10:39,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 00:10:39,036 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 [2022-10-16 00:10:39,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:10:39,048 INFO L225 Difference]: With dead ends: 65 [2022-10-16 00:10:39,048 INFO L226 Difference]: Without dead ends: 63 [2022-10-16 00:10:39,051 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 [2022-10-16 00:10:39,057 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 68 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 00:10:39,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 53 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 00:10:39,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-10-16 00:10:39,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-10-16 00:10:39,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 46 states have (on average 1.5869565217391304) internal successors, (73), 62 states have internal predecessors, (73), 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) [2022-10-16 00:10:39,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2022-10-16 00:10:39,114 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 4 [2022-10-16 00:10:39,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:10:39,115 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2022-10-16 00:10:39,115 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) [2022-10-16 00:10:39,116 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2022-10-16 00:10:39,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-16 00:10:39,116 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:10:39,117 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-16 00:10:39,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-16 00:10:39,118 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-16 00:10:39,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:10:39,119 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2022-10-16 00:10:39,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:10:39,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684157805] [2022-10-16 00:10:39,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:10:39,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:10:39,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:10:39,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:10:39,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:10:39,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684157805] [2022-10-16 00:10:39,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684157805] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 00:10:39,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 00:10:39,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 00:10:39,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260407022] [2022-10-16 00:10:39,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 00:10:39,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 00:10:39,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:10:39,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 00:10:39,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 00:10:39,518 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:10:39,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:10:39,795 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2022-10-16 00:10:39,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 00:10:39,797 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-16 00:10:39,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:10:39,804 INFO L225 Difference]: With dead ends: 71 [2022-10-16 00:10:39,804 INFO L226 Difference]: Without dead ends: 71 [2022-10-16 00:10:39,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-16 00:10:39,814 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 85 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 00:10:39,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 88 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 00:10:39,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-10-16 00:10:39,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2022-10-16 00:10:39,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 48 states have (on average 1.5625) internal successors, (75), 64 states have internal predecessors, (75), 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) [2022-10-16 00:10:39,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2022-10-16 00:10:39,849 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 4 [2022-10-16 00:10:39,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:10:39,850 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2022-10-16 00:10:39,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:10:39,853 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2022-10-16 00:10:39,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-10-16 00:10:39,854 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:10:39,854 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-10-16 00:10:39,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-16 00:10:39,856 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-16 00:10:39,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:10:39,869 INFO L85 PathProgramCache]: Analyzing trace with hash 889659654, now seen corresponding path program 1 times [2022-10-16 00:10:39,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:10:39,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576270479] [2022-10-16 00:10:39,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:10:39,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:10:39,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:10:40,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:10:40,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:10:40,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576270479] [2022-10-16 00:10:40,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576270479] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 00:10:40,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 00:10:40,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 00:10:40,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941985485] [2022-10-16 00:10:40,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 00:10:40,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 00:10:40,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:10:40,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 00:10:40,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 00:10:40,027 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-10-16 00:10:40,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:10:40,077 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2022-10-16 00:10:40,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 00:10:40,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2022-10-16 00:10:40,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:10:40,079 INFO L225 Difference]: With dead ends: 62 [2022-10-16 00:10:40,079 INFO L226 Difference]: Without dead ends: 62 [2022-10-16 00:10:40,080 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 [2022-10-16 00:10:40,082 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 63 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 00:10:40,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 54 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 00:10:40,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-10-16 00:10:40,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-10-16 00:10:40,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 48 states have (on average 1.5) internal successors, (72), 61 states have internal predecessors, (72), 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) [2022-10-16 00:10:40,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2022-10-16 00:10:40,092 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 6 [2022-10-16 00:10:40,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:10:40,093 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2022-10-16 00:10:40,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-10-16 00:10:40,094 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2022-10-16 00:10:40,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-10-16 00:10:40,095 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:10:40,095 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-10-16 00:10:40,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-16 00:10:40,096 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-16 00:10:40,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:10:40,098 INFO L85 PathProgramCache]: Analyzing trace with hash 889659655, now seen corresponding path program 1 times [2022-10-16 00:10:40,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:10:40,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407393275] [2022-10-16 00:10:40,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:10:40,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:10:40,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:10:40,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:10:40,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:10:40,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407393275] [2022-10-16 00:10:40,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407393275] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 00:10:40,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 00:10:40,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 00:10:40,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573416338] [2022-10-16 00:10:40,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 00:10:40,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 00:10:40,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:10:40,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 00:10:40,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 00:10:40,330 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-10-16 00:10:40,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:10:40,497 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2022-10-16 00:10:40,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 00:10:40,498 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2022-10-16 00:10:40,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:10:40,504 INFO L225 Difference]: With dead ends: 66 [2022-10-16 00:10:40,504 INFO L226 Difference]: Without dead ends: 66 [2022-10-16 00:10:40,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-16 00:10:40,516 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 76 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 00:10:40,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 85 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 00:10:40,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-10-16 00:10:40,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-10-16 00:10:40,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 50 states have (on average 1.48) internal successors, (74), 63 states have internal predecessors, (74), 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) [2022-10-16 00:10:40,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2022-10-16 00:10:40,540 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 6 [2022-10-16 00:10:40,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:10:40,542 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2022-10-16 00:10:40,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-10-16 00:10:40,543 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2022-10-16 00:10:40,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-16 00:10:40,544 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:10:40,544 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 00:10:40,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-16 00:10:40,545 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-16 00:10:40,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:10:40,546 INFO L85 PathProgramCache]: Analyzing trace with hash 719163786, now seen corresponding path program 1 times [2022-10-16 00:10:40,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:10:40,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795513485] [2022-10-16 00:10:40,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:10:40,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:10:40,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:10:40,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:10:40,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:10:40,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795513485] [2022-10-16 00:10:40,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795513485] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 00:10:40,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698921270] [2022-10-16 00:10:40,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:10:40,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 00:10:40,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 00:10:40,958 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) [2022-10-16 00:10:40,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-16 00:10:41,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:10:41,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2022-10-16 00:10:41,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 00:10:41,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 00:10:41,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-16 00:10:41,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 00:10:41,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:10:41,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 00:10:41,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-16 00:10:41,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:10:41,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698921270] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 00:10:41,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 00:10:41,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 9 [2022-10-16 00:10:41,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081337770] [2022-10-16 00:10:41,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 00:10:41,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-16 00:10:41,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:10:41,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-16 00:10:41,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-10-16 00:10:41,481 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 11 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:10:41,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:10:41,909 INFO L93 Difference]: Finished difference Result 136 states and 158 transitions. [2022-10-16 00:10:41,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-16 00:10:41,910 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-10-16 00:10:41,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:10:41,913 INFO L225 Difference]: With dead ends: 136 [2022-10-16 00:10:41,914 INFO L226 Difference]: Without dead ends: 136 [2022-10-16 00:10:41,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-10-16 00:10:41,916 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 416 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-16 00:10:41,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 142 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-16 00:10:41,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-10-16 00:10:41,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 83. [2022-10-16 00:10:41,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 69 states have (on average 1.434782608695652) internal successors, (99), 82 states have internal predecessors, (99), 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) [2022-10-16 00:10:41,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2022-10-16 00:10:41,927 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 10 [2022-10-16 00:10:41,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:10:41,928 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2022-10-16 00:10:41,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:10:41,929 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2022-10-16 00:10:41,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-16 00:10:41,930 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:10:41,930 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-16 00:10:41,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-16 00:10:42,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 00:10:42,145 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-16 00:10:42,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:10:42,146 INFO L85 PathProgramCache]: Analyzing trace with hash -373337781, now seen corresponding path program 1 times [2022-10-16 00:10:42,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:10:42,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864608298] [2022-10-16 00:10:42,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:10:42,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:10:42,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:10:42,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:10:42,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:10:42,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864608298] [2022-10-16 00:10:42,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864608298] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 00:10:42,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045377931] [2022-10-16 00:10:42,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:10:42,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 00:10:42,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 00:10:42,434 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) [2022-10-16 00:10:42,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-16 00:10:42,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:10:42,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-16 00:10:42,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 00:10:42,569 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-16 00:10:42,570 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-16 00:10:42,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:10:42,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 00:10:42,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:10:42,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045377931] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 00:10:42,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 00:10:42,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 9 [2022-10-16 00:10:42,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236755344] [2022-10-16 00:10:42,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 00:10:42,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-16 00:10:42,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:10:42,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-16 00:10:42,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-10-16 00:10:42,831 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand has 11 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 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) [2022-10-16 00:10:43,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:10:43,226 INFO L93 Difference]: Finished difference Result 133 states and 155 transitions. [2022-10-16 00:10:43,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-16 00:10:43,227 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-10-16 00:10:43,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:10:43,229 INFO L225 Difference]: With dead ends: 133 [2022-10-16 00:10:43,229 INFO L226 Difference]: Without dead ends: 133 [2022-10-16 00:10:43,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-10-16 00:10:43,231 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 382 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-16 00:10:43,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 203 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-16 00:10:43,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-10-16 00:10:43,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 85. [2022-10-16 00:10:43,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 71 states have (on average 1.3943661971830985) internal successors, (99), 84 states have internal predecessors, (99), 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) [2022-10-16 00:10:43,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-10-16 00:10:43,241 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 12 [2022-10-16 00:10:43,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:10:43,241 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-10-16 00:10:43,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 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) [2022-10-16 00:10:43,242 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-10-16 00:10:43,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-16 00:10:43,243 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:10:43,243 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-16 00:10:43,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-16 00:10:43,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-10-16 00:10:43,457 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-16 00:10:43,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:10:43,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1824164062, now seen corresponding path program 1 times [2022-10-16 00:10:43,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:10:43,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17880900] [2022-10-16 00:10:43,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:10:43,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:10:43,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:10:43,882 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 00:10:43,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:10:43,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17880900] [2022-10-16 00:10:43,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17880900] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 00:10:43,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401438311] [2022-10-16 00:10:43,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:10:43,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 00:10:43,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 00:10:43,886 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) [2022-10-16 00:10:43,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-16 00:10:43,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:10:43,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-16 00:10:43,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 00:10:44,126 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:10:44,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 00:10:44,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:10:44,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401438311] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 00:10:44,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 00:10:44,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2022-10-16 00:10:44,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828615623] [2022-10-16 00:10:44,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 00:10:44,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-16 00:10:44,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:10:44,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-16 00:10:44,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-10-16 00:10:44,215 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:10:44,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:10:44,915 INFO L93 Difference]: Finished difference Result 209 states and 241 transitions. [2022-10-16 00:10:44,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-16 00:10:44,916 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-10-16 00:10:44,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:10:44,918 INFO L225 Difference]: With dead ends: 209 [2022-10-16 00:10:44,918 INFO L226 Difference]: Without dead ends: 209 [2022-10-16 00:10:44,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=181, Invalid=419, Unknown=0, NotChecked=0, Total=600 [2022-10-16 00:10:44,920 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 475 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-16 00:10:44,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [475 Valid, 251 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-16 00:10:44,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-10-16 00:10:44,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 130. [2022-10-16 00:10:44,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 116 states have (on average 1.353448275862069) internal successors, (157), 129 states have internal predecessors, (157), 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) [2022-10-16 00:10:44,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 157 transitions. [2022-10-16 00:10:44,931 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 157 transitions. Word has length 18 [2022-10-16 00:10:44,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:10:44,932 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 157 transitions. [2022-10-16 00:10:44,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:10:44,933 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 157 transitions. [2022-10-16 00:10:44,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-10-16 00:10:44,934 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:10:44,934 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1] [2022-10-16 00:10:44,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-16 00:10:45,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 00:10:45,148 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-16 00:10:45,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:10:45,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1808870570, now seen corresponding path program 2 times [2022-10-16 00:10:45,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:10:45,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911986235] [2022-10-16 00:10:45,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:10:45,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:10:45,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:10:45,868 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:10:45,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:10:45,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911986235] [2022-10-16 00:10:45,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911986235] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 00:10:45,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921388264] [2022-10-16 00:10:45,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 00:10:45,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 00:10:45,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 00:10:45,875 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) [2022-10-16 00:10:45,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-16 00:10:45,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 00:10:45,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 00:10:45,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 22 conjunts are in the unsatisfiable core [2022-10-16 00:10:45,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 00:10:46,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 00:10:46,017 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-16 00:10:46,024 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 00:10:46,341 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:10:46,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 00:10:46,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-16 00:10:46,771 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:10:46,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921388264] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 00:10:46,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 00:10:46,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 18 [2022-10-16 00:10:46,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516606508] [2022-10-16 00:10:46,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 00:10:46,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-10-16 00:10:46,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:10:46,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-10-16 00:10:46,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2022-10-16 00:10:46,776 INFO L87 Difference]: Start difference. First operand 130 states and 157 transitions. Second operand has 20 states, 19 states have (on average 4.368421052631579) internal successors, (83), 19 states have internal predecessors, (83), 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) [2022-10-16 00:10:47,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:10:47,772 INFO L93 Difference]: Finished difference Result 303 states and 368 transitions. [2022-10-16 00:10:47,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-16 00:10:47,773 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.368421052631579) internal successors, (83), 19 states have internal predecessors, (83), 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 28 [2022-10-16 00:10:47,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:10:47,776 INFO L225 Difference]: With dead ends: 303 [2022-10-16 00:10:47,776 INFO L226 Difference]: Without dead ends: 303 [2022-10-16 00:10:47,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=237, Invalid=693, Unknown=0, NotChecked=0, Total=930 [2022-10-16 00:10:47,778 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 592 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-16 00:10:47,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [592 Valid, 385 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-16 00:10:47,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-10-16 00:10:47,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 155. [2022-10-16 00:10:47,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 141 states have (on average 1.3404255319148937) internal successors, (189), 154 states have internal predecessors, (189), 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) [2022-10-16 00:10:47,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 189 transitions. [2022-10-16 00:10:47,789 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 189 transitions. Word has length 28 [2022-10-16 00:10:47,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:10:47,789 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 189 transitions. [2022-10-16 00:10:47,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.368421052631579) internal successors, (83), 19 states have internal predecessors, (83), 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) [2022-10-16 00:10:47,790 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 189 transitions. [2022-10-16 00:10:47,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-10-16 00:10:47,791 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:10:47,791 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1] [2022-10-16 00:10:47,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-16 00:10:48,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 00:10:48,005 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-16 00:10:48,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:10:48,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1137135639, now seen corresponding path program 2 times [2022-10-16 00:10:48,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:10:48,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692641803] [2022-10-16 00:10:48,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:10:48,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:10:48,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:10:48,445 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:10:48,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:10:48,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692641803] [2022-10-16 00:10:48,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692641803] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 00:10:48,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074658954] [2022-10-16 00:10:48,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 00:10:48,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 00:10:48,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 00:10:48,449 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) [2022-10-16 00:10:48,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-16 00:10:48,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-16 00:10:48,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 00:10:48,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-16 00:10:48,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 00:10:48,585 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-16 00:10:48,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-16 00:10:48,890 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-10-16 00:10:48,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 00:10:49,580 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-10-16 00:10:49,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074658954] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 00:10:49,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 00:10:49,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 14 [2022-10-16 00:10:49,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663202801] [2022-10-16 00:10:49,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 00:10:49,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-10-16 00:10:49,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:10:49,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-10-16 00:10:49,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-10-16 00:10:49,586 INFO L87 Difference]: Start difference. First operand 155 states and 189 transitions. Second operand has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:10:50,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:10:50,197 INFO L93 Difference]: Finished difference Result 161 states and 192 transitions. [2022-10-16 00:10:50,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-16 00:10:50,199 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-10-16 00:10:50,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:10:50,201 INFO L225 Difference]: With dead ends: 161 [2022-10-16 00:10:50,202 INFO L226 Difference]: Without dead ends: 161 [2022-10-16 00:10:50,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2022-10-16 00:10:50,204 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 273 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-16 00:10:50,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 179 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-16 00:10:50,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-10-16 00:10:50,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 154. [2022-10-16 00:10:50,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 141 states have (on average 1.297872340425532) internal successors, (183), 153 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:10:50,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 183 transitions. [2022-10-16 00:10:50,212 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 183 transitions. Word has length 30 [2022-10-16 00:10:50,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:10:50,213 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 183 transitions. [2022-10-16 00:10:50,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:10:50,214 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 183 transitions. [2022-10-16 00:10:50,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-10-16 00:10:50,215 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:10:50,216 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 00:10:50,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-16 00:10:50,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 00:10:50,431 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-16 00:10:50,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:10:50,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1498862906, now seen corresponding path program 1 times [2022-10-16 00:10:50,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:10:50,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518069121] [2022-10-16 00:10:50,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:10:50,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:10:50,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:10:50,674 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-10-16 00:10:50,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:10:50,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518069121] [2022-10-16 00:10:50,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518069121] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 00:10:50,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 00:10:50,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 00:10:50,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488573335] [2022-10-16 00:10:50,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 00:10:50,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 00:10:50,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:10:50,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 00:10:50,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 00:10:50,679 INFO L87 Difference]: Start difference. First operand 154 states and 183 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2022-10-16 00:10:50,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:10:50,706 INFO L93 Difference]: Finished difference Result 283 states and 341 transitions. [2022-10-16 00:10:50,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-16 00:10:50,707 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 45 [2022-10-16 00:10:50,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:10:50,711 INFO L225 Difference]: With dead ends: 283 [2022-10-16 00:10:50,711 INFO L226 Difference]: Without dead ends: 283 [2022-10-16 00:10:50,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-16 00:10:50,714 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 136 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 00:10:50,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 187 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 00:10:50,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-10-16 00:10:50,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 159. [2022-10-16 00:10:50,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 146 states have (on average 1.2808219178082192) internal successors, (187), 158 states have internal predecessors, (187), 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) [2022-10-16 00:10:50,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 187 transitions. [2022-10-16 00:10:50,722 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 187 transitions. Word has length 45 [2022-10-16 00:10:50,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:10:50,723 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 187 transitions. [2022-10-16 00:10:50,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2022-10-16 00:10:50,724 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 187 transitions. [2022-10-16 00:10:50,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-10-16 00:10:50,725 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:10:50,725 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 00:10:50,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-10-16 00:10:50,726 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-16 00:10:50,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:10:50,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1782722791, now seen corresponding path program 1 times [2022-10-16 00:10:50,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:10:50,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750785163] [2022-10-16 00:10:50,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:10:50,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:10:50,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:10:50,898 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-10-16 00:10:50,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:10:50,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750785163] [2022-10-16 00:10:50,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750785163] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 00:10:50,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 00:10:50,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 00:10:50,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601335689] [2022-10-16 00:10:50,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 00:10:50,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 00:10:50,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:10:50,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 00:10:50,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 00:10:50,906 INFO L87 Difference]: Start difference. First operand 159 states and 187 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:10:50,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:10:50,925 INFO L93 Difference]: Finished difference Result 221 states and 261 transitions. [2022-10-16 00:10:50,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 00:10:50,926 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-10-16 00:10:50,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:10:50,928 INFO L225 Difference]: With dead ends: 221 [2022-10-16 00:10:50,928 INFO L226 Difference]: Without dead ends: 221 [2022-10-16 00:10:50,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-16 00:10:50,930 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 46 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 00:10:50,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 203 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 00:10:50,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-10-16 00:10:50,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 153. [2022-10-16 00:10:50,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 140 states have (on average 1.2642857142857142) internal successors, (177), 152 states have internal predecessors, (177), 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) [2022-10-16 00:10:50,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 177 transitions. [2022-10-16 00:10:50,937 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 177 transitions. Word has length 50 [2022-10-16 00:10:50,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:10:50,938 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 177 transitions. [2022-10-16 00:10:50,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:10:50,938 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 177 transitions. [2022-10-16 00:10:50,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-10-16 00:10:50,939 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:10:50,939 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 00:10:50,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-10-16 00:10:50,940 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-16 00:10:50,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:10:50,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1783091657, now seen corresponding path program 1 times [2022-10-16 00:10:50,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:10:50,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55436316] [2022-10-16 00:10:50,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:10:50,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:10:50,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:10:51,098 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-10-16 00:10:51,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:10:51,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55436316] [2022-10-16 00:10:51,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55436316] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 00:10:51,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 00:10:51,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-16 00:10:51,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213455605] [2022-10-16 00:10:51,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 00:10:51,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 00:10:51,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:10:51,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 00:10:51,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 00:10:51,102 INFO L87 Difference]: Start difference. First operand 153 states and 177 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:10:51,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:10:51,155 INFO L93 Difference]: Finished difference Result 153 states and 177 transitions. [2022-10-16 00:10:51,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 00:10:51,155 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-10-16 00:10:51,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:10:51,157 INFO L225 Difference]: With dead ends: 153 [2022-10-16 00:10:51,157 INFO L226 Difference]: Without dead ends: 153 [2022-10-16 00:10:51,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-16 00:10:51,159 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 102 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 00:10:51,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 64 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 00:10:51,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-10-16 00:10:51,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2022-10-16 00:10:51,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 140 states have (on average 1.2571428571428571) internal successors, (176), 151 states have internal predecessors, (176), 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) [2022-10-16 00:10:51,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 176 transitions. [2022-10-16 00:10:51,176 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 176 transitions. Word has length 50 [2022-10-16 00:10:51,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:10:51,177 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 176 transitions. [2022-10-16 00:10:51,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:10:51,180 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 176 transitions. [2022-10-16 00:10:51,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-10-16 00:10:51,182 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:10:51,182 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 00:10:51,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-10-16 00:10:51,183 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-16 00:10:51,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:10:51,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1783091656, now seen corresponding path program 1 times [2022-10-16 00:10:51,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:10:51,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004756747] [2022-10-16 00:10:51,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:10:51,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:10:51,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:10:51,606 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-10-16 00:10:51,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:10:51,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004756747] [2022-10-16 00:10:51,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004756747] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 00:10:51,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971665422] [2022-10-16 00:10:51,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:10:51,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 00:10:51,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 00:10:51,609 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) [2022-10-16 00:10:51,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-16 00:10:51,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:10:51,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-16 00:10:51,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 00:10:51,997 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:10:51,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 00:10:52,196 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:10:52,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971665422] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 00:10:52,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 00:10:52,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 22 [2022-10-16 00:10:52,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767827797] [2022-10-16 00:10:52,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 00:10:52,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-10-16 00:10:52,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:10:52,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-10-16 00:10:52,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2022-10-16 00:10:52,200 INFO L87 Difference]: Start difference. First operand 152 states and 176 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 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) [2022-10-16 00:10:54,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:10:54,135 INFO L93 Difference]: Finished difference Result 696 states and 801 transitions. [2022-10-16 00:10:54,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-10-16 00:10:54,136 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 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 [2022-10-16 00:10:54,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:10:54,141 INFO L225 Difference]: With dead ends: 696 [2022-10-16 00:10:54,142 INFO L226 Difference]: Without dead ends: 696 [2022-10-16 00:10:54,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1009, Invalid=2531, Unknown=0, NotChecked=0, Total=3540 [2022-10-16 00:10:54,145 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 2131 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2131 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-16 00:10:54,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2131 Valid, 355 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-10-16 00:10:54,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-10-16 00:10:54,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 225. [2022-10-16 00:10:54,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 213 states have (on average 1.2394366197183098) internal successors, (264), 224 states have internal predecessors, (264), 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) [2022-10-16 00:10:54,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 264 transitions. [2022-10-16 00:10:54,160 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 264 transitions. Word has length 50 [2022-10-16 00:10:54,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:10:54,160 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 264 transitions. [2022-10-16 00:10:54,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 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) [2022-10-16 00:10:54,161 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 264 transitions. [2022-10-16 00:10:54,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-10-16 00:10:54,162 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:10:54,162 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 1, 1, 1] [2022-10-16 00:10:54,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-16 00:10:54,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 00:10:54,377 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-16 00:10:54,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:10:54,379 INFO L85 PathProgramCache]: Analyzing trace with hash -317127186, now seen corresponding path program 3 times [2022-10-16 00:10:54,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:10:54,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549263341] [2022-10-16 00:10:54,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:10:54,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:10:54,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:10:55,637 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:10:55,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:10:55,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549263341] [2022-10-16 00:10:55,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549263341] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 00:10:55,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257291596] [2022-10-16 00:10:55,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 00:10:55,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 00:10:55,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 00:10:55,640 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) [2022-10-16 00:10:55,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-16 00:10:55,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-16 00:10:55,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 00:10:55,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-16 00:10:55,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 00:10:55,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 00:10:55,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-16 00:10:55,796 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 00:10:56,236 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 46 proven. 10 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2022-10-16 00:10:56,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 00:10:56,905 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2022-10-16 00:10:56,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257291596] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 00:10:56,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 00:10:56,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 23 [2022-10-16 00:10:56,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506663283] [2022-10-16 00:10:56,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 00:10:56,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-10-16 00:10:56,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:10:56,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-10-16 00:10:56,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2022-10-16 00:10:56,910 INFO L87 Difference]: Start difference. First operand 225 states and 264 transitions. Second operand has 24 states, 23 states have (on average 4.043478260869565) internal successors, (93), 24 states have internal predecessors, (93), 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) [2022-10-16 00:10:57,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:10:57,980 INFO L93 Difference]: Finished difference Result 238 states and 265 transitions. [2022-10-16 00:10:57,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-10-16 00:10:57,981 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.043478260869565) internal successors, (93), 24 states have internal predecessors, (93), 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 64 [2022-10-16 00:10:57,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:10:57,986 INFO L225 Difference]: With dead ends: 238 [2022-10-16 00:10:57,986 INFO L226 Difference]: Without dead ends: 238 [2022-10-16 00:10:57,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=276, Invalid=536, Unknown=0, NotChecked=0, Total=812 [2022-10-16 00:10:57,989 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 506 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-16 00:10:57,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 453 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 814 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-10-16 00:10:57,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-10-16 00:10:57,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 226. [2022-10-16 00:10:57,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 215 states have (on average 1.1674418604651162) internal successors, (251), 225 states have internal predecessors, (251), 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) [2022-10-16 00:10:58,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 251 transitions. [2022-10-16 00:10:58,001 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 251 transitions. Word has length 64 [2022-10-16 00:10:58,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:10:58,002 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 251 transitions. [2022-10-16 00:10:58,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.043478260869565) internal successors, (93), 24 states have internal predecessors, (93), 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) [2022-10-16 00:10:58,002 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 251 transitions. [2022-10-16 00:10:58,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-10-16 00:10:58,009 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:10:58,009 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 00:10:58,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-16 00:10:58,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 00:10:58,226 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-16 00:10:58,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:10:58,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1815383464, now seen corresponding path program 1 times [2022-10-16 00:10:58,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:10:58,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490134441] [2022-10-16 00:10:58,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:10:58,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:10:58,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:10:59,208 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 0 proven. 560 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 00:10:59,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:10:59,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490134441] [2022-10-16 00:10:59,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490134441] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 00:10:59,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070721433] [2022-10-16 00:10:59,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:10:59,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 00:10:59,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 00:10:59,211 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) [2022-10-16 00:10:59,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-16 00:10:59,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:10:59,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 17 conjunts are in the unsatisfiable core [2022-10-16 00:10:59,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 00:10:59,996 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 0 proven. 560 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 00:10:59,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 00:11:00,696 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 0 proven. 560 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 00:11:00,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070721433] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 00:11:00,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 00:11:00,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 48 [2022-10-16 00:11:00,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742709244] [2022-10-16 00:11:00,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 00:11:00,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-10-16 00:11:00,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:11:00,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-10-16 00:11:00,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1027, Invalid=1325, Unknown=0, NotChecked=0, Total=2352 [2022-10-16 00:11:00,705 INFO L87 Difference]: Start difference. First operand 226 states and 251 transitions. Second operand has 49 states, 49 states have (on average 5.612244897959184) internal successors, (275), 48 states have internal predecessors, (275), 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) [2022-10-16 00:11:02,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:11:02,810 INFO L93 Difference]: Finished difference Result 739 states and 840 transitions. [2022-10-16 00:11:02,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-10-16 00:11:02,811 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 5.612244897959184) internal successors, (275), 48 states have internal predecessors, (275), 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 103 [2022-10-16 00:11:02,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:11:02,815 INFO L225 Difference]: With dead ends: 739 [2022-10-16 00:11:02,815 INFO L226 Difference]: Without dead ends: 739 [2022-10-16 00:11:02,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1552, Invalid=2480, Unknown=0, NotChecked=0, Total=4032 [2022-10-16 00:11:02,818 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 2985 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2985 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-16 00:11:02,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2985 Valid, 592 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-10-16 00:11:02,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2022-10-16 00:11:02,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 418. [2022-10-16 00:11:02,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 407 states have (on average 1.1277641277641277) internal successors, (459), 417 states have internal predecessors, (459), 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) [2022-10-16 00:11:02,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 459 transitions. [2022-10-16 00:11:02,839 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 459 transitions. Word has length 103 [2022-10-16 00:11:02,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:11:02,840 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 459 transitions. [2022-10-16 00:11:02,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 5.612244897959184) internal successors, (275), 48 states have internal predecessors, (275), 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) [2022-10-16 00:11:02,841 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 459 transitions. [2022-10-16 00:11:02,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-10-16 00:11:02,843 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:11:02,844 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 00:11:02,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-16 00:11:03,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-10-16 00:11:03,059 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-16 00:11:03,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:11:03,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1941069336, now seen corresponding path program 2 times [2022-10-16 00:11:03,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:11:03,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285221736] [2022-10-16 00:11:03,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:11:03,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:11:03,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:11:05,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2642 backedges. 0 proven. 2640 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 00:11:05,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:11:05,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285221736] [2022-10-16 00:11:05,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285221736] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 00:11:05,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416502541] [2022-10-16 00:11:05,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 00:11:05,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 00:11:05,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 00:11:05,903 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) [2022-10-16 00:11:05,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-16 00:11:06,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 00:11:06,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 00:11:06,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 33 conjunts are in the unsatisfiable core [2022-10-16 00:11:06,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 00:11:07,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2642 backedges. 0 proven. 2640 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 00:11:07,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 00:11:09,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2642 backedges. 0 proven. 2640 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 00:11:09,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416502541] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 00:11:09,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 00:11:09,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 96 [2022-10-16 00:11:09,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110575996] [2022-10-16 00:11:09,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 00:11:09,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-10-16 00:11:09,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:11:09,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-10-16 00:11:09,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4099, Invalid=5213, Unknown=0, NotChecked=0, Total=9312 [2022-10-16 00:11:09,993 INFO L87 Difference]: Start difference. First operand 418 states and 459 transitions. Second operand has 97 states, 97 states have (on average 5.804123711340206) internal successors, (563), 96 states have internal predecessors, (563), 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) [2022-10-16 00:11:17,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:11:17,316 INFO L93 Difference]: Finished difference Result 1475 states and 1672 transitions. [2022-10-16 00:11:17,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-10-16 00:11:17,317 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 5.804123711340206) internal successors, (563), 96 states have internal predecessors, (563), 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 199 [2022-10-16 00:11:17,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:11:17,325 INFO L225 Difference]: With dead ends: 1475 [2022-10-16 00:11:17,325 INFO L226 Difference]: Without dead ends: 1475 [2022-10-16 00:11:17,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5825 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=6176, Invalid=10080, Unknown=0, NotChecked=0, Total=16256 [2022-10-16 00:11:17,333 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 5440 mSDsluCounter, 1090 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 751 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5440 SdHoareTripleChecker+Valid, 1131 SdHoareTripleChecker+Invalid, 1776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 751 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-10-16 00:11:17,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5440 Valid, 1131 Invalid, 1776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [751 Valid, 1025 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-10-16 00:11:17,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1475 states. [2022-10-16 00:11:17,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1475 to 802. [2022-10-16 00:11:17,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 791 states have (on average 1.1061946902654867) internal successors, (875), 801 states have internal predecessors, (875), 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) [2022-10-16 00:11:17,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 875 transitions. [2022-10-16 00:11:17,388 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 875 transitions. Word has length 199 [2022-10-16 00:11:17,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:11:17,389 INFO L495 AbstractCegarLoop]: Abstraction has 802 states and 875 transitions. [2022-10-16 00:11:17,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 5.804123711340206) internal successors, (563), 96 states have internal predecessors, (563), 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) [2022-10-16 00:11:17,391 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 875 transitions. [2022-10-16 00:11:17,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2022-10-16 00:11:17,401 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:11:17,402 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 62, 62, 62, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 00:11:17,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-16 00:11:17,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-10-16 00:11:17,617 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-16 00:11:17,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:11:17,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1508455832, now seen corresponding path program 3 times [2022-10-16 00:11:17,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:11:17,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62402688] [2022-10-16 00:11:17,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:11:17,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:11:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:11:26,568 INFO L134 CoverageAnalysis]: Checked inductivity of 11410 backedges. 0 proven. 11408 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 00:11:26,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:11:26,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62402688] [2022-10-16 00:11:26,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62402688] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 00:11:26,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775488705] [2022-10-16 00:11:26,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 00:11:26,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 00:11:26,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 00:11:26,571 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) [2022-10-16 00:11:26,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-16 00:11:26,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-16 00:11:26,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 00:11:26,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-16 00:11:26,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 00:11:26,865 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-16 00:11:26,866 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-16 00:11:29,732 INFO L134 CoverageAnalysis]: Checked inductivity of 11410 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 11408 trivial. 0 not checked. [2022-10-16 00:11:29,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 00:11:36,389 INFO L134 CoverageAnalysis]: Checked inductivity of 11410 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 11408 trivial. 0 not checked. [2022-10-16 00:11:36,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775488705] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 00:11:36,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 00:11:36,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 5, 5] total 74 [2022-10-16 00:11:36,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129633871] [2022-10-16 00:11:36,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 00:11:36,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-10-16 00:11:36,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:11:36,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-10-16 00:11:36,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2112, Invalid=3290, Unknown=0, NotChecked=0, Total=5402 [2022-10-16 00:11:36,397 INFO L87 Difference]: Start difference. First operand 802 states and 875 transitions. Second operand has 74 states, 74 states have (on average 5.9324324324324325) internal successors, (439), 74 states have internal predecessors, (439), 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) [2022-10-16 00:11:55,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:11:55,153 INFO L93 Difference]: Finished difference Result 1522 states and 1723 transitions. [2022-10-16 00:11:55,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2022-10-16 00:11:55,154 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 5.9324324324324325) internal successors, (439), 74 states have internal predecessors, (439), 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 391 [2022-10-16 00:11:55,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:11:55,162 INFO L225 Difference]: With dead ends: 1522 [2022-10-16 00:11:55,163 INFO L226 Difference]: Without dead ends: 1522 [2022-10-16 00:11:55,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1037 GetRequests, 773 SyntacticMatches, 0 SemanticMatches, 264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21054 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=21298, Invalid=49192, Unknown=0, NotChecked=0, Total=70490 [2022-10-16 00:11:55,174 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 5104 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 838 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5104 SdHoareTripleChecker+Valid, 968 SdHoareTripleChecker+Invalid, 1960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 838 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-10-16 00:11:55,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5104 Valid, 968 Invalid, 1960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [838 Valid, 1122 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-10-16 00:11:55,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2022-10-16 00:11:55,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 818. [2022-10-16 00:11:55,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 809 states have (on average 1.103831891223733) internal successors, (893), 817 states have internal predecessors, (893), 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) [2022-10-16 00:11:55,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 893 transitions. [2022-10-16 00:11:55,200 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 893 transitions. Word has length 391 [2022-10-16 00:11:55,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:11:55,201 INFO L495 AbstractCegarLoop]: Abstraction has 818 states and 893 transitions. [2022-10-16 00:11:55,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 5.9324324324324325) internal successors, (439), 74 states have internal predecessors, (439), 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) [2022-10-16 00:11:55,202 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 893 transitions. [2022-10-16 00:11:55,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2022-10-16 00:11:55,210 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:11:55,210 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 00:11:55,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-16 00:11:55,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-10-16 00:11:55,426 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-16 00:11:55,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:11:55,427 INFO L85 PathProgramCache]: Analyzing trace with hash -751077401, now seen corresponding path program 1 times [2022-10-16 00:11:55,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:11:55,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221934845] [2022-10-16 00:11:55,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:11:55,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:11:55,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:11:56,697 INFO L134 CoverageAnalysis]: Checked inductivity of 11782 backedges. 0 proven. 373 refuted. 0 times theorem prover too weak. 11409 trivial. 0 not checked. [2022-10-16 00:11:56,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:11:56,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221934845] [2022-10-16 00:11:56,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221934845] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 00:11:56,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206988842] [2022-10-16 00:11:56,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:11:56,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 00:11:56,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 00:11:56,704 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 00:11:56,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-10-16 00:11:57,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:11:57,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 1654 conjuncts, 66 conjunts are in the unsatisfiable core [2022-10-16 00:11:57,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 00:12:01,871 INFO L134 CoverageAnalysis]: Checked inductivity of 11782 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 00:12:01,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 00:12:08,218 INFO L134 CoverageAnalysis]: Checked inductivity of 11782 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 00:12:08,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206988842] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 00:12:08,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 00:12:08,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 66, 66] total 135 [2022-10-16 00:12:08,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472787901] [2022-10-16 00:12:08,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 00:12:08,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-10-16 00:12:08,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:12:08,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-10-16 00:12:08,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8526, Invalid=9564, Unknown=0, NotChecked=0, Total=18090 [2022-10-16 00:12:08,233 INFO L87 Difference]: Start difference. First operand 818 states and 893 transitions. Second operand has 135 states, 135 states have (on average 6.022222222222222) internal successors, (813), 135 states have internal predecessors, (813), 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) [2022-10-16 00:13:07,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:13:07,720 INFO L93 Difference]: Finished difference Result 2989 states and 3384 transitions. [2022-10-16 00:13:07,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 260 states. [2022-10-16 00:13:07,722 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 6.022222222222222) internal successors, (813), 135 states have internal predecessors, (813), 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 399 [2022-10-16 00:13:07,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:13:07,746 INFO L225 Difference]: With dead ends: 2989 [2022-10-16 00:13:07,746 INFO L226 Difference]: Without dead ends: 2989 [2022-10-16 00:13:07,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 994 GetRequests, 667 SyntacticMatches, 1 SemanticMatches, 326 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31271 ImplicationChecksByTransitivity, 30.4s TimeCoverageRelationStatistics Valid=40309, Invalid=66947, Unknown=0, NotChecked=0, Total=107256 [2022-10-16 00:13:07,758 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 12322 mSDsluCounter, 1504 mSDsCounter, 0 mSdLazyCounter, 1847 mSolverCounterSat, 2231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12322 SdHoareTripleChecker+Valid, 1534 SdHoareTripleChecker+Invalid, 4078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2231 IncrementalHoareTripleChecker+Valid, 1847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-10-16 00:13:07,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12322 Valid, 1534 Invalid, 4078 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2231 Valid, 1847 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-10-16 00:13:07,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2989 states. [2022-10-16 00:13:07,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2989 to 1588. [2022-10-16 00:13:07,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1588 states, 1581 states have (on average 1.0917141049968375) internal successors, (1726), 1587 states have internal predecessors, (1726), 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) [2022-10-16 00:13:07,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 1726 transitions. [2022-10-16 00:13:07,817 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 1726 transitions. Word has length 399 [2022-10-16 00:13:07,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:13:07,818 INFO L495 AbstractCegarLoop]: Abstraction has 1588 states and 1726 transitions. [2022-10-16 00:13:07,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 6.022222222222222) internal successors, (813), 135 states have internal predecessors, (813), 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) [2022-10-16 00:13:07,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 1726 transitions. [2022-10-16 00:13:07,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 791 [2022-10-16 00:13:07,828 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:13:07,829 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 128, 128, 128, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 00:13:07,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-10-16 00:13:08,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-10-16 00:13:08,043 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-10-16 00:13:08,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:13:08,044 INFO L85 PathProgramCache]: Analyzing trace with hash -993627688, now seen corresponding path program 1 times [2022-10-16 00:13:08,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:13:08,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878676763] [2022-10-16 00:13:08,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:13:08,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:13:08,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:13:09,712 INFO L134 CoverageAnalysis]: Checked inductivity of 48900 backedges. 255 proven. 1 refuted. 0 times theorem prover too weak. 48644 trivial. 0 not checked. [2022-10-16 00:13:09,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:13:09,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878676763] [2022-10-16 00:13:09,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878676763] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 00:13:09,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683430089] [2022-10-16 00:13:09,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:13:09,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 00:13:09,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 00:13:09,715 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 00:13:09,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-10-16 00:13:10,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:13:10,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 3235 conjuncts, 131 conjunts are in the unsatisfiable core [2022-10-16 00:13:10,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 00:13:23,269 INFO L134 CoverageAnalysis]: Checked inductivity of 48900 backedges. 0 proven. 48896 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-16 00:13:23,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 00:13:43,100 INFO L134 CoverageAnalysis]: Checked inductivity of 48900 backedges. 0 proven. 48896 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-16 00:13:43,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683430089] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 00:13:43,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 00:13:43,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 131, 131] total 264 [2022-10-16 00:13:43,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533321357] [2022-10-16 00:13:43,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 00:13:43,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 264 states [2022-10-16 00:13:43,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:13:43,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 264 interpolants. [2022-10-16 00:13:43,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33937, Invalid=35495, Unknown=0, NotChecked=0, Total=69432 [2022-10-16 00:13:43,123 INFO L87 Difference]: Start difference. First operand 1588 states and 1726 transitions. Second operand has 264 states, 264 states have (on average 6.007575757575758) internal successors, (1586), 264 states have internal predecessors, (1586), 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)