/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-examples/standard_partition_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-16 05:31:05,063 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-16 05:31:05,065 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-16 05:31:05,099 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-10-16 05:31:05,150 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-16 05:31:05,151 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-16 05:31:05,152 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-16 05:31:05,153 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 05:31:05,181 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-16 05:31:05,181 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-16 05:31:05,182 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-16 05:31:05,182 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-16 05:31:05,183 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-16 05:31:05,183 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-16 05:31:05,184 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-16 05:31:05,184 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-16 05:31:05,184 INFO L138 SettingsManager]: * Use SBE=true [2022-10-16 05:31:05,184 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-16 05:31:05,185 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-16 05:31:05,185 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-16 05:31:05,185 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-16 05:31:05,185 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-16 05:31:05,185 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-16 05:31:05,185 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-16 05:31:05,186 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-16 05:31:05,186 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-16 05:31:05,186 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-16 05:31:05,186 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-16 05:31:05,186 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-16 05:31:05,187 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-16 05:31:05,187 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-16 05:31:05,187 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-16 05:31:05,187 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-16 05:31:05,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 05:31:05,188 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-16 05:31:05,188 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-16 05:31:05,188 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-16 05:31:05,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-16 05:31:05,188 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-16 05:31:05,542 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-16 05:31:05,568 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-16 05:31:05,571 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-16 05:31:05,573 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-16 05:31:05,574 INFO L275 PluginConnector]: CDTParser initialized [2022-10-16 05:31:05,577 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_partition_ground-1.i [2022-10-16 05:31:05,654 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2275264ac/76f0dc4bd53d4705b1f779debcf89d02/FLAG1a782f7a6 [2022-10-16 05:31:06,324 INFO L306 CDTParser]: Found 1 translation units. [2022-10-16 05:31:06,325 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partition_ground-1.i [2022-10-16 05:31:06,334 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2275264ac/76f0dc4bd53d4705b1f779debcf89d02/FLAG1a782f7a6 [2022-10-16 05:31:06,669 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2275264ac/76f0dc4bd53d4705b1f779debcf89d02 [2022-10-16 05:31:06,674 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-16 05:31:06,682 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-16 05:31:06,686 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-16 05:31:06,686 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-16 05:31:06,691 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-16 05:31:06,691 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 05:31:06" (1/1) ... [2022-10-16 05:31:06,694 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dafc263 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:31:06, skipping insertion in model container [2022-10-16 05:31:06,694 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 05:31:06" (1/1) ... [2022-10-16 05:31:06,702 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-16 05:31:06,724 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-16 05:31:06,880 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-examples/standard_partition_ground-1.i[860,873] [2022-10-16 05:31:06,902 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 05:31:06,912 INFO L203 MainTranslator]: Completed pre-run [2022-10-16 05:31:06,934 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-examples/standard_partition_ground-1.i[860,873] [2022-10-16 05:31:06,946 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 05:31:06,962 INFO L208 MainTranslator]: Completed translation [2022-10-16 05:31:06,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:31:06 WrapperNode [2022-10-16 05:31:06,963 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-16 05:31:06,964 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-16 05:31:06,964 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-16 05:31:06,965 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-16 05:31:06,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:31:06" (1/1) ... [2022-10-16 05:31:06,981 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:31:06" (1/1) ... [2022-10-16 05:31:07,012 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 82 [2022-10-16 05:31:07,013 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-16 05:31:07,014 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-16 05:31:07,014 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-16 05:31:07,014 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-16 05:31:07,024 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:31:06" (1/1) ... [2022-10-16 05:31:07,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:31:06" (1/1) ... [2022-10-16 05:31:07,028 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:31:06" (1/1) ... [2022-10-16 05:31:07,028 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:31:06" (1/1) ... [2022-10-16 05:31:07,035 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:31:06" (1/1) ... [2022-10-16 05:31:07,041 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:31:06" (1/1) ... [2022-10-16 05:31:07,042 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:31:06" (1/1) ... [2022-10-16 05:31:07,044 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:31:06" (1/1) ... [2022-10-16 05:31:07,050 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-16 05:31:07,051 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-16 05:31:07,051 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-16 05:31:07,051 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-16 05:31:07,053 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:31:06" (1/1) ... [2022-10-16 05:31:07,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 05:31:07,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:31:07,090 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 05:31:07,104 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 05:31:07,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-16 05:31:07,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-16 05:31:07,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-16 05:31:07,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-16 05:31:07,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-16 05:31:07,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-16 05:31:07,184 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-16 05:31:07,184 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-10-16 05:31:07,184 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-10-16 05:31:07,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-16 05:31:07,303 INFO L235 CfgBuilder]: Building ICFG [2022-10-16 05:31:07,306 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-16 05:31:07,752 INFO L276 CfgBuilder]: Performing block encoding [2022-10-16 05:31:07,760 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-16 05:31:07,761 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-10-16 05:31:07,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 05:31:07 BoogieIcfgContainer [2022-10-16 05:31:07,764 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-16 05:31:07,766 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-16 05:31:07,766 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-16 05:31:07,770 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-16 05:31:07,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 05:31:06" (1/3) ... [2022-10-16 05:31:07,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bcf79ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 05:31:07, skipping insertion in model container [2022-10-16 05:31:07,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:31:06" (2/3) ... [2022-10-16 05:31:07,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bcf79ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 05:31:07, skipping insertion in model container [2022-10-16 05:31:07,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 05:31:07" (3/3) ... [2022-10-16 05:31:07,774 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-1.i [2022-10-16 05:31:07,834 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-16 05:31:07,834 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-10-16 05:31:07,896 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-16 05:31:07,905 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;@1971d1b0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-16 05:31:07,906 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-10-16 05:31:07,911 INFO L276 IsEmpty]: Start isEmpty. Operand has 60 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 56 states have internal predecessors, (67), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 05:31:07,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-16 05:31:07,924 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:31:07,924 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-16 05:31:07,925 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-16 05:31:07,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:31:07,931 INFO L85 PathProgramCache]: Analyzing trace with hash 925797, now seen corresponding path program 1 times [2022-10-16 05:31:07,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:31:07,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123933728] [2022-10-16 05:31:07,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:31:07,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:31:08,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:31:08,407 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 05:31:08,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:31:08,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123933728] [2022-10-16 05:31:08,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123933728] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:31:08,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:31:08,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 05:31:08,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404872750] [2022-10-16 05:31:08,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:31:08,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 05:31:08,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:31:08,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 05:31:08,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:31:08,457 INFO L87 Difference]: Start difference. First operand has 60 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 56 states have internal predecessors, (67), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) 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 05:31:08,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:31:08,538 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2022-10-16 05:31:08,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 05:31:08,540 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 05:31:08,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:31:08,550 INFO L225 Difference]: With dead ends: 55 [2022-10-16 05:31:08,550 INFO L226 Difference]: Without dead ends: 53 [2022-10-16 05:31:08,552 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 05:31:08,557 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 45 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 05:31:08,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 48 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 05:31:08,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-10-16 05:31:08,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-10-16 05:31:08,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 49 states have internal predecessors, (55), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 05:31:08,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2022-10-16 05:31:08,604 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 4 [2022-10-16 05:31:08,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:31:08,605 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2022-10-16 05:31:08,605 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 05:31:08,605 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2022-10-16 05:31:08,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-16 05:31:08,606 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:31:08,606 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-16 05:31:08,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-16 05:31:08,607 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-16 05:31:08,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:31:08,607 INFO L85 PathProgramCache]: Analyzing trace with hash 925798, now seen corresponding path program 1 times [2022-10-16 05:31:08,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:31:08,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430182819] [2022-10-16 05:31:08,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:31:08,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:31:08,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:31:08,938 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 05:31:08,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:31:08,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430182819] [2022-10-16 05:31:08,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430182819] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:31:08,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:31:08,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 05:31:08,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322024925] [2022-10-16 05:31:08,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:31:08,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 05:31:08,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:31:08,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 05:31:08,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:31:08,944 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. 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 05:31:09,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:31:09,029 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2022-10-16 05:31:09,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 05:31:09,030 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 05:31:09,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:31:09,032 INFO L225 Difference]: With dead ends: 64 [2022-10-16 05:31:09,032 INFO L226 Difference]: Without dead ends: 64 [2022-10-16 05:31:09,033 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 05:31:09,035 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 10 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:31:09,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 83 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:31:09,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-10-16 05:31:09,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2022-10-16 05:31:09,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 55 states have internal predecessors, (62), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 05:31:09,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2022-10-16 05:31:09,048 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 4 [2022-10-16 05:31:09,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:31:09,048 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2022-10-16 05:31:09,049 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 05:31:09,049 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2022-10-16 05:31:09,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-16 05:31:09,053 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:31:09,054 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:31:09,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-16 05:31:09,054 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-16 05:31:09,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:31:09,059 INFO L85 PathProgramCache]: Analyzing trace with hash 524645940, now seen corresponding path program 1 times [2022-10-16 05:31:09,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:31:09,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059058073] [2022-10-16 05:31:09,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:31:09,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:31:09,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:31:09,254 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 05:31:09,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:31:09,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059058073] [2022-10-16 05:31:09,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059058073] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:31:09,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:31:09,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 05:31:09,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928767934] [2022-10-16 05:31:09,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:31:09,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 05:31:09,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:31:09,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 05:31:09,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:31:09,262 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:31:09,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:31:09,341 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2022-10-16 05:31:09,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 05:31:09,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-10-16 05:31:09,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:31:09,347 INFO L225 Difference]: With dead ends: 57 [2022-10-16 05:31:09,347 INFO L226 Difference]: Without dead ends: 57 [2022-10-16 05:31:09,350 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 05:31:09,353 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 38 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 05:31:09,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 48 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 05:31:09,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-10-16 05:31:09,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-10-16 05:31:09,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 53 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 05:31:09,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2022-10-16 05:31:09,375 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 9 [2022-10-16 05:31:09,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:31:09,378 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2022-10-16 05:31:09,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:31:09,379 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2022-10-16 05:31:09,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-16 05:31:09,380 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:31:09,380 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:31:09,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-16 05:31:09,381 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-16 05:31:09,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:31:09,385 INFO L85 PathProgramCache]: Analyzing trace with hash 524645941, now seen corresponding path program 1 times [2022-10-16 05:31:09,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:31:09,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132321023] [2022-10-16 05:31:09,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:31:09,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:31:09,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:31:09,620 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 05:31:09,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:31:09,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132321023] [2022-10-16 05:31:09,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132321023] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:31:09,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:31:09,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 05:31:09,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108260887] [2022-10-16 05:31:09,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:31:09,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 05:31:09,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:31:09,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 05:31:09,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:31:09,644 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:31:09,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:31:09,725 INFO L93 Difference]: Finished difference Result 97 states and 112 transitions. [2022-10-16 05:31:09,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 05:31:09,726 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-10-16 05:31:09,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:31:09,728 INFO L225 Difference]: With dead ends: 97 [2022-10-16 05:31:09,728 INFO L226 Difference]: Without dead ends: 97 [2022-10-16 05:31:09,728 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 05:31:09,730 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 36 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:31:09,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 69 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:31:09,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-10-16 05:31:09,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 65. [2022-10-16 05:31:09,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 49 states have (on average 1.489795918367347) internal successors, (73), 61 states have internal predecessors, (73), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 05:31:09,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2022-10-16 05:31:09,743 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 9 [2022-10-16 05:31:09,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:31:09,743 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2022-10-16 05:31:09,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:31:09,744 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2022-10-16 05:31:09,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-16 05:31:09,745 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:31:09,745 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:31:09,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-16 05:31:09,745 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-16 05:31:09,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:31:09,746 INFO L85 PathProgramCache]: Analyzing trace with hash -915567766, now seen corresponding path program 1 times [2022-10-16 05:31:09,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:31:09,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005866915] [2022-10-16 05:31:09,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:31:09,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:31:09,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:31:09,929 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 05:31:09,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:31:09,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005866915] [2022-10-16 05:31:09,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005866915] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:31:09,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798952365] [2022-10-16 05:31:09,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:31:09,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:31:09,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:31:09,934 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 05:31:09,958 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 05:31:10,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:31:10,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 18 conjunts are in the unsatisfiable core [2022-10-16 05:31:10,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:31:10,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 05:31:10,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 05:31:10,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 05:31:10,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-10-16 05:31:10,138 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-16 05:31:10,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-10-16 05:31:10,219 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 05:31:10,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:31:10,363 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 05:31:10,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798952365] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:31:10,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:31:10,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-10-16 05:31:10,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62510143] [2022-10-16 05:31:10,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:31:10,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-16 05:31:10,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:31:10,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-16 05:31:10,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-10-16 05:31:10,367 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:31:10,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:31:10,536 INFO L93 Difference]: Finished difference Result 108 states and 126 transitions. [2022-10-16 05:31:10,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-16 05:31:10,537 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-10-16 05:31:10,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:31:10,539 INFO L225 Difference]: With dead ends: 108 [2022-10-16 05:31:10,539 INFO L226 Difference]: Without dead ends: 108 [2022-10-16 05:31:10,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-10-16 05:31:10,541 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 63 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:31:10,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 154 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:31:10,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-10-16 05:31:10,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2022-10-16 05:31:10,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 91 states have (on average 1.3186813186813187) internal successors, (120), 100 states have internal predecessors, (120), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 05:31:10,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 124 transitions. [2022-10-16 05:31:10,555 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 124 transitions. Word has length 10 [2022-10-16 05:31:10,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:31:10,556 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 124 transitions. [2022-10-16 05:31:10,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:31:10,556 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 124 transitions. [2022-10-16 05:31:10,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-16 05:31:10,557 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:31:10,557 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-16 05:31:10,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-10-16 05:31:10,773 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 05:31:10,774 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-16 05:31:10,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:31:10,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1375485569, now seen corresponding path program 1 times [2022-10-16 05:31:10,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:31:10,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937973783] [2022-10-16 05:31:10,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:31:10,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:31:10,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:31:10,989 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:31:10,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:31:10,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937973783] [2022-10-16 05:31:10,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937973783] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:31:10,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233896555] [2022-10-16 05:31:10,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:31:10,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:31:10,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:31:10,992 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 05:31:11,009 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 05:31:11,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:31:11,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-16 05:31:11,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:31:11,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 05:31:11,110 INFO L356 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-10-16 05:31:11,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2022-10-16 05:31:11,121 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2022-10-16 05:31:11,277 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:31:11,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:31:11,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:31:11,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233896555] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:31:11,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:31:11,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-10-16 05:31:11,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469552734] [2022-10-16 05:31:11,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:31:11,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-16 05:31:11,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:31:11,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-16 05:31:11,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-10-16 05:31:11,441 INFO L87 Difference]: Start difference. First operand 104 states and 124 transitions. Second operand has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:31:11,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:31:11,651 INFO L93 Difference]: Finished difference Result 260 states and 311 transitions. [2022-10-16 05:31:11,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-16 05:31:11,652 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-10-16 05:31:11,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:31:11,654 INFO L225 Difference]: With dead ends: 260 [2022-10-16 05:31:11,654 INFO L226 Difference]: Without dead ends: 260 [2022-10-16 05:31:11,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-10-16 05:31:11,656 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 253 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 05:31:11,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 202 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 05:31:11,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-10-16 05:31:11,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 148. [2022-10-16 05:31:11,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 135 states have (on average 1.2962962962962963) internal successors, (175), 144 states have internal predecessors, (175), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 05:31:11,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 179 transitions. [2022-10-16 05:31:11,672 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 179 transitions. Word has length 18 [2022-10-16 05:31:11,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:31:11,673 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 179 transitions. [2022-10-16 05:31:11,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:31:11,673 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 179 transitions. [2022-10-16 05:31:11,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-16 05:31:11,674 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:31:11,674 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-16 05:31:11,712 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 05:31:11,888 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 05:31:11,889 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-16 05:31:11,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:31:11,890 INFO L85 PathProgramCache]: Analyzing trace with hash 168685417, now seen corresponding path program 1 times [2022-10-16 05:31:11,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:31:11,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820108117] [2022-10-16 05:31:11,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:31:11,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:31:11,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:31:11,998 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 05:31:11,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:31:11,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820108117] [2022-10-16 05:31:11,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820108117] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:31:11,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377559672] [2022-10-16 05:31:12,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:31:12,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:31:12,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:31:12,001 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 05:31:12,034 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 05:31:12,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:31:12,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-16 05:31:12,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:31:12,118 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 05:31:12,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:31:12,164 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 05:31:12,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377559672] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:31:12,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:31:12,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2022-10-16 05:31:12,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755787918] [2022-10-16 05:31:12,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:31:12,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-16 05:31:12,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:31:12,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-16 05:31:12,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2022-10-16 05:31:12,167 INFO L87 Difference]: Start difference. First operand 148 states and 179 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 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 05:31:12,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:31:12,427 INFO L93 Difference]: Finished difference Result 278 states and 320 transitions. [2022-10-16 05:31:12,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-16 05:31:12,428 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 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 05:31:12,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:31:12,430 INFO L225 Difference]: With dead ends: 278 [2022-10-16 05:31:12,430 INFO L226 Difference]: Without dead ends: 278 [2022-10-16 05:31:12,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-10-16 05:31:12,432 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 318 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 05:31:12,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 124 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 05:31:12,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-10-16 05:31:12,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 262. [2022-10-16 05:31:12,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 249 states have (on average 1.2690763052208835) internal successors, (316), 258 states have internal predecessors, (316), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 05:31:12,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 320 transitions. [2022-10-16 05:31:12,448 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 320 transitions. Word has length 18 [2022-10-16 05:31:12,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:31:12,452 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 320 transitions. [2022-10-16 05:31:12,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 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 05:31:12,452 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 320 transitions. [2022-10-16 05:31:12,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-10-16 05:31:12,455 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:31:12,455 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1] [2022-10-16 05:31:12,487 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 05:31:12,668 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 05:31:12,669 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-16 05:31:12,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:31:12,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1269881462, now seen corresponding path program 2 times [2022-10-16 05:31:12,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:31:12,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472479348] [2022-10-16 05:31:12,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:31:12,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:31:12,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:31:13,084 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 05:31:13,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:31:13,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472479348] [2022-10-16 05:31:13,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472479348] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:31:13,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128022999] [2022-10-16 05:31:13,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:31:13,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:31:13,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:31:13,087 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 05:31:13,092 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 05:31:13,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 05:31:13,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:31:13,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2022-10-16 05:31:13,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:31:13,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 05:31:13,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 05:31:13,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 05:31:13,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-10-16 05:31:13,208 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-16 05:31:13,209 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-10-16 05:31:13,455 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:31:13,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 05:31:13,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128022999] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:31:13,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 05:31:13,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2022-10-16 05:31:13,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123681207] [2022-10-16 05:31:13,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:31:13,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-16 05:31:13,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:31:13,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-16 05:31:13,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-10-16 05:31:13,458 INFO L87 Difference]: Start difference. First operand 262 states and 320 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:31:13,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:31:13,648 INFO L93 Difference]: Finished difference Result 269 states and 308 transitions. [2022-10-16 05:31:13,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-16 05:31:13,648 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-10-16 05:31:13,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:31:13,650 INFO L225 Difference]: With dead ends: 269 [2022-10-16 05:31:13,650 INFO L226 Difference]: Without dead ends: 269 [2022-10-16 05:31:13,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-10-16 05:31:13,652 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 105 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 05:31:13,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 149 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 05:31:13,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-10-16 05:31:13,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 261. [2022-10-16 05:31:13,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 249 states have (on average 1.2208835341365463) internal successors, (304), 257 states have internal predecessors, (304), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 05:31:13,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 308 transitions. [2022-10-16 05:31:13,664 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 308 transitions. Word has length 28 [2022-10-16 05:31:13,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:31:13,665 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 308 transitions. [2022-10-16 05:31:13,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:31:13,665 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 308 transitions. [2022-10-16 05:31:13,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-10-16 05:31:13,668 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:31:13,668 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1] [2022-10-16 05:31:13,711 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 05:31:13,882 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 05:31:13,883 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-16 05:31:13,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:31:13,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1514651339, now seen corresponding path program 2 times [2022-10-16 05:31:13,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:31:13,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021703428] [2022-10-16 05:31:13,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:31:13,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:31:13,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:31:14,312 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:31:14,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:31:14,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021703428] [2022-10-16 05:31:14,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021703428] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:31:14,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792053304] [2022-10-16 05:31:14,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:31:14,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:31:14,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:31:14,314 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 05:31:14,317 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 05:31:14,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 05:31:14,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:31:14,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 26 conjunts are in the unsatisfiable core [2022-10-16 05:31:14,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:31:14,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 05:31:14,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 05:31:14,457 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-16 05:31:14,457 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-10-16 05:31:14,466 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 14 treesize of output 12 [2022-10-16 05:31:14,774 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:31:14,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:31:15,085 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:31:15,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792053304] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:31:15,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:31:15,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-10-16 05:31:15,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388724456] [2022-10-16 05:31:15,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:31:15,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-10-16 05:31:15,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:31:15,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-10-16 05:31:15,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-10-16 05:31:15,094 INFO L87 Difference]: Start difference. First operand 261 states and 308 transitions. Second operand has 16 states, 15 states have (on average 8.333333333333334) internal successors, (125), 16 states have internal predecessors, (125), 0 states have call successors, (0), 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 05:31:15,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:31:15,894 INFO L93 Difference]: Finished difference Result 948 states and 1236 transitions. [2022-10-16 05:31:15,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-16 05:31:15,895 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 8.333333333333334) internal successors, (125), 16 states have internal predecessors, (125), 0 states have call successors, (0), 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 05:31:15,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:31:15,901 INFO L225 Difference]: With dead ends: 948 [2022-10-16 05:31:15,901 INFO L226 Difference]: Without dead ends: 948 [2022-10-16 05:31:15,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2022-10-16 05:31:15,902 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 1111 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1123 SdHoareTripleChecker+Valid, 983 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-16 05:31:15,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1123 Valid, 983 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-16 05:31:15,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2022-10-16 05:31:15,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 318. [2022-10-16 05:31:15,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 306 states have (on average 1.2156862745098038) internal successors, (372), 314 states have internal predecessors, (372), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 05:31:15,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 376 transitions. [2022-10-16 05:31:15,942 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 376 transitions. Word has length 45 [2022-10-16 05:31:15,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:31:15,942 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 376 transitions. [2022-10-16 05:31:15,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 8.333333333333334) internal successors, (125), 16 states have internal predecessors, (125), 0 states have call successors, (0), 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 05:31:15,943 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 376 transitions. [2022-10-16 05:31:15,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-10-16 05:31:15,946 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:31:15,946 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:31:15,976 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 05:31:16,159 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 05:31:16,160 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-16 05:31:16,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:31:16,162 INFO L85 PathProgramCache]: Analyzing trace with hash 2142105888, now seen corresponding path program 1 times [2022-10-16 05:31:16,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:31:16,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949704364] [2022-10-16 05:31:16,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:31:16,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:31:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:31:16,254 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 05:31:16,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:31:16,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949704364] [2022-10-16 05:31:16,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949704364] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:31:16,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:31:16,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 05:31:16,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330354670] [2022-10-16 05:31:16,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:31:16,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 05:31:16,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:31:16,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 05:31:16,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:31:16,257 INFO L87 Difference]: Start difference. First operand 318 states and 376 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 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 05:31:16,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:31:16,278 INFO L93 Difference]: Finished difference Result 316 states and 369 transitions. [2022-10-16 05:31:16,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 05:31:16,279 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 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 05:31:16,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:31:16,281 INFO L225 Difference]: With dead ends: 316 [2022-10-16 05:31:16,281 INFO L226 Difference]: Without dead ends: 316 [2022-10-16 05:31:16,282 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 05:31:16,282 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 26 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 05:31:16,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 44 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 05:31:16,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-10-16 05:31:16,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 316. [2022-10-16 05:31:16,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 306 states have (on average 1.1928104575163399) internal successors, (365), 312 states have internal predecessors, (365), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 05:31:16,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 369 transitions. [2022-10-16 05:31:16,291 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 369 transitions. Word has length 45 [2022-10-16 05:31:16,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:31:16,292 INFO L495 AbstractCegarLoop]: Abstraction has 316 states and 369 transitions. [2022-10-16 05:31:16,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 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 05:31:16,292 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 369 transitions. [2022-10-16 05:31:16,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-10-16 05:31:16,294 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:31:16,295 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:31:16,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-10-16 05:31:16,295 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-16 05:31:16,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:31:16,296 INFO L85 PathProgramCache]: Analyzing trace with hash 2142105889, now seen corresponding path program 1 times [2022-10-16 05:31:16,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:31:16,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391590631] [2022-10-16 05:31:16,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:31:16,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:31:16,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:31:16,443 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 05:31:16,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:31:16,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391590631] [2022-10-16 05:31:16,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391590631] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:31:16,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025876223] [2022-10-16 05:31:16,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:31:16,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:31:16,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:31:16,445 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 05:31:16,454 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 05:31:16,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:31:16,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-16 05:31:16,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:31:16,590 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 05:31:16,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:31:16,712 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 05:31:16,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025876223] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:31:16,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:31:16,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-10-16 05:31:16,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18816584] [2022-10-16 05:31:16,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:31:16,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-16 05:31:16,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:31:16,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-16 05:31:16,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-16 05:31:16,716 INFO L87 Difference]: Start difference. First operand 316 states and 369 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 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 05:31:16,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:31:16,925 INFO L93 Difference]: Finished difference Result 1054 states and 1181 transitions. [2022-10-16 05:31:16,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-16 05:31:16,925 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 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 05:31:16,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:31:16,931 INFO L225 Difference]: With dead ends: 1054 [2022-10-16 05:31:16,931 INFO L226 Difference]: Without dead ends: 1054 [2022-10-16 05:31:16,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-16 05:31:16,932 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 527 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 05:31:16,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 290 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 05:31:16,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2022-10-16 05:31:16,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1036. [2022-10-16 05:31:16,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1026 states have (on average 1.1471734892787524) internal successors, (1177), 1032 states have internal predecessors, (1177), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 05:31:16,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 1181 transitions. [2022-10-16 05:31:16,955 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 1181 transitions. Word has length 45 [2022-10-16 05:31:16,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:31:16,956 INFO L495 AbstractCegarLoop]: Abstraction has 1036 states and 1181 transitions. [2022-10-16 05:31:16,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 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 05:31:16,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 1181 transitions. [2022-10-16 05:31:16,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-10-16 05:31:16,960 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:31:16,960 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:31:16,996 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 05:31:17,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:31:17,176 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-16 05:31:17,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:31:17,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1783312127, now seen corresponding path program 2 times [2022-10-16 05:31:17,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:31:17,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608310881] [2022-10-16 05:31:17,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:31:17,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:31:17,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:31:17,712 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:31:17,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:31:17,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608310881] [2022-10-16 05:31:17,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608310881] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:31:17,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752724737] [2022-10-16 05:31:17,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:31:17,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:31:17,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:31:17,714 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 05:31:17,728 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 05:31:17,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-16 05:31:17,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:31:17,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-16 05:31:17,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:31:17,853 INFO L356 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-10-16 05:31:17,853 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-10-16 05:31:18,309 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 560 trivial. 0 not checked. [2022-10-16 05:31:18,309 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 05:31:18,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752724737] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:31:18,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 05:31:18,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [17] total 18 [2022-10-16 05:31:18,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357180458] [2022-10-16 05:31:18,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:31:18,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 05:31:18,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:31:18,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 05:31:18,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-10-16 05:31:18,314 INFO L87 Difference]: Start difference. First operand 1036 states and 1181 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 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 05:31:18,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:31:18,355 INFO L93 Difference]: Finished difference Result 1145 states and 1309 transitions. [2022-10-16 05:31:18,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 05:31:18,355 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 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 93 [2022-10-16 05:31:18,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:31:18,361 INFO L225 Difference]: With dead ends: 1145 [2022-10-16 05:31:18,362 INFO L226 Difference]: Without dead ends: 1145 [2022-10-16 05:31:18,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-10-16 05:31:18,363 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 24 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 05:31:18,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 57 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 05:31:18,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2022-10-16 05:31:18,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 1116. [2022-10-16 05:31:18,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1106 states have (on average 1.150994575045208) internal successors, (1273), 1112 states have internal predecessors, (1273), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 05:31:18,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 1277 transitions. [2022-10-16 05:31:18,388 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 1277 transitions. Word has length 93 [2022-10-16 05:31:18,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:31:18,388 INFO L495 AbstractCegarLoop]: Abstraction has 1116 states and 1277 transitions. [2022-10-16 05:31:18,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 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 05:31:18,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 1277 transitions. [2022-10-16 05:31:18,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-10-16 05:31:18,391 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:31:18,391 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:31:18,423 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 05:31:18,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:31:18,607 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-16 05:31:18,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:31:18,608 INFO L85 PathProgramCache]: Analyzing trace with hash 552176316, now seen corresponding path program 1 times [2022-10-16 05:31:18,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:31:18,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248588220] [2022-10-16 05:31:18,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:31:18,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:31:18,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:31:19,108 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 05:31:19,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:31:19,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248588220] [2022-10-16 05:31:19,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248588220] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:31:19,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615831430] [2022-10-16 05:31:19,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:31:19,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:31:19,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:31:19,110 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 05:31:19,127 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 05:31:19,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:31:19,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-16 05:31:19,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:31:19,363 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 05:31:19,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:31:19,787 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 05:31:19,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615831430] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:31:19,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:31:19,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-10-16 05:31:19,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484725198] [2022-10-16 05:31:19,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:31:19,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-10-16 05:31:19,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:31:19,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-10-16 05:31:19,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-10-16 05:31:19,792 INFO L87 Difference]: Start difference. First operand 1116 states and 1277 transitions. Second operand has 33 states, 33 states have (on average 5.636363636363637) internal successors, (186), 33 states have internal predecessors, (186), 0 states have call successors, (0), 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 05:31:20,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:31:20,396 INFO L93 Difference]: Finished difference Result 2941 states and 3293 transitions. [2022-10-16 05:31:20,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-10-16 05:31:20,396 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.636363636363637) internal successors, (186), 33 states have internal predecessors, (186), 0 states have call successors, (0), 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 94 [2022-10-16 05:31:20,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:31:20,410 INFO L225 Difference]: With dead ends: 2941 [2022-10-16 05:31:20,411 INFO L226 Difference]: Without dead ends: 2941 [2022-10-16 05:31:20,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-10-16 05:31:20,412 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 1343 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1343 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-16 05:31:20,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1343 Valid, 465 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-16 05:31:20,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2941 states. [2022-10-16 05:31:20,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2941 to 2892. [2022-10-16 05:31:20,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2892 states, 2882 states have (on average 1.1412213740458015) internal successors, (3289), 2888 states have internal predecessors, (3289), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 05:31:20,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2892 states to 2892 states and 3293 transitions. [2022-10-16 05:31:20,486 INFO L78 Accepts]: Start accepts. Automaton has 2892 states and 3293 transitions. Word has length 94 [2022-10-16 05:31:20,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:31:20,487 INFO L495 AbstractCegarLoop]: Abstraction has 2892 states and 3293 transitions. [2022-10-16 05:31:20,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.636363636363637) internal successors, (186), 33 states have internal predecessors, (186), 0 states have call successors, (0), 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 05:31:20,487 INFO L276 IsEmpty]: Start isEmpty. Operand 2892 states and 3293 transitions. [2022-10-16 05:31:20,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-10-16 05:31:20,490 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:31:20,490 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1] [2022-10-16 05:31:20,527 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 05:31:20,703 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,SelfDestructingSolverStorable12 [2022-10-16 05:31:20,704 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-16 05:31:20,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:31:20,705 INFO L85 PathProgramCache]: Analyzing trace with hash 943104437, now seen corresponding path program 3 times [2022-10-16 05:31:20,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:31:20,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518401834] [2022-10-16 05:31:20,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:31:20,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:31:20,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:31:21,799 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 0 proven. 475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:31:21,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:31:21,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518401834] [2022-10-16 05:31:21,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518401834] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:31:21,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443320888] [2022-10-16 05:31:21,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 05:31:21,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:31:21,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:31:21,804 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 05:31:21,811 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 05:31:22,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-10-16 05:31:22,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:31:22,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 53 conjunts are in the unsatisfiable core [2022-10-16 05:31:22,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:31:22,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 05:31:22,818 INFO L356 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-10-16 05:31:22,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2022-10-16 05:31:22,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2022-10-16 05:31:24,282 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 0 proven. 475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:31:24,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:31:25,436 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 0 proven. 475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:31:25,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443320888] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:31:25,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:31:25,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 22, 12] total 44 [2022-10-16 05:31:25,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886365326] [2022-10-16 05:31:25,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:31:25,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-10-16 05:31:25,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:31:25,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-10-16 05:31:25,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=1539, Unknown=0, NotChecked=0, Total=1980 [2022-10-16 05:31:25,441 INFO L87 Difference]: Start difference. First operand 2892 states and 3293 transitions. Second operand has 45 states, 44 states have (on average 6.704545454545454) internal successors, (295), 45 states have internal predecessors, (295), 0 states have call successors, (0), 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 05:31:33,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:31:33,043 INFO L93 Difference]: Finished difference Result 13307 states and 16024 transitions. [2022-10-16 05:31:33,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-10-16 05:31:33,044 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 6.704545454545454) internal successors, (295), 45 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2022-10-16 05:31:33,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:31:33,113 INFO L225 Difference]: With dead ends: 13307 [2022-10-16 05:31:33,113 INFO L226 Difference]: Without dead ends: 13307 [2022-10-16 05:31:33,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1392, Invalid=4158, Unknown=0, NotChecked=0, Total=5550 [2022-10-16 05:31:33,117 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 3997 mSDsluCounter, 5611 mSDsCounter, 0 mSdLazyCounter, 9221 mSolverCounterSat, 352 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4021 SdHoareTripleChecker+Valid, 5899 SdHoareTripleChecker+Invalid, 9573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 352 IncrementalHoareTripleChecker+Valid, 9221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-10-16 05:31:33,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4021 Valid, 5899 Invalid, 9573 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [352 Valid, 9221 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-10-16 05:31:33,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13307 states. [2022-10-16 05:31:33,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13307 to 4386. [2022-10-16 05:31:33,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4386 states, 4376 states have (on average 1.1300274223034734) internal successors, (4945), 4382 states have internal predecessors, (4945), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 05:31:33,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4386 states to 4386 states and 4949 transitions. [2022-10-16 05:31:33,308 INFO L78 Accepts]: Start accepts. Automaton has 4386 states and 4949 transitions. Word has length 99 [2022-10-16 05:31:33,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:31:33,308 INFO L495 AbstractCegarLoop]: Abstraction has 4386 states and 4949 transitions. [2022-10-16 05:31:33,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 6.704545454545454) internal successors, (295), 45 states have internal predecessors, (295), 0 states have call successors, (0), 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 05:31:33,309 INFO L276 IsEmpty]: Start isEmpty. Operand 4386 states and 4949 transitions. [2022-10-16 05:31:33,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-10-16 05:31:33,322 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:31:33,322 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:31:33,370 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 05:31:33,536 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,SelfDestructingSolverStorable13 [2022-10-16 05:31:33,537 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-16 05:31:33,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:31:33,538 INFO L85 PathProgramCache]: Analyzing trace with hash -617250052, now seen corresponding path program 2 times [2022-10-16 05:31:33,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:31:33,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013131967] [2022-10-16 05:31:33,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:31:33,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:31:33,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:31:35,060 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 05:31:35,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:31:35,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013131967] [2022-10-16 05:31:35,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013131967] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:31:35,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471367897] [2022-10-16 05:31:35,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:31:35,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:31:35,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:31:35,062 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 05:31:35,088 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 05:31:35,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 05:31:35,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:31:35,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 711 conjuncts, 32 conjunts are in the unsatisfiable core [2022-10-16 05:31:35,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:31:35,447 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 05:31:35,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:31:36,899 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 05:31:36,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471367897] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:31:36,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:31:36,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2022-10-16 05:31:36,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743080830] [2022-10-16 05:31:36,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:31:36,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-10-16 05:31:36,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:31:36,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-10-16 05:31:36,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-10-16 05:31:36,905 INFO L87 Difference]: Start difference. First operand 4386 states and 4949 transitions. Second operand has 65 states, 65 states have (on average 5.815384615384615) internal successors, (378), 65 states have internal predecessors, (378), 0 states have call successors, (0), 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 05:31:38,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:31:38,927 INFO L93 Difference]: Finished difference Result 11495 states and 12821 transitions. [2022-10-16 05:31:38,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-10-16 05:31:38,928 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 5.815384615384615) internal successors, (378), 65 states have internal predecessors, (378), 0 states have call successors, (0), 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 190 [2022-10-16 05:31:38,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:31:38,965 INFO L225 Difference]: With dead ends: 11495 [2022-10-16 05:31:38,965 INFO L226 Difference]: Without dead ends: 11495 [2022-10-16 05:31:38,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-10-16 05:31:38,968 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 3185 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3185 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-16 05:31:38,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3185 Valid, 807 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-16 05:31:38,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11495 states. [2022-10-16 05:31:39,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11495 to 11394. [2022-10-16 05:31:39,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11394 states, 11384 states have (on average 1.1258784258608574) internal successors, (12817), 11390 states have internal predecessors, (12817), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 05:31:39,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11394 states to 11394 states and 12821 transitions. [2022-10-16 05:31:39,192 INFO L78 Accepts]: Start accepts. Automaton has 11394 states and 12821 transitions. Word has length 190 [2022-10-16 05:31:39,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:31:39,192 INFO L495 AbstractCegarLoop]: Abstraction has 11394 states and 12821 transitions. [2022-10-16 05:31:39,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 5.815384615384615) internal successors, (378), 65 states have internal predecessors, (378), 0 states have call successors, (0), 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 05:31:39,193 INFO L276 IsEmpty]: Start isEmpty. Operand 11394 states and 12821 transitions. [2022-10-16 05:31:39,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-10-16 05:31:39,201 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:31:39,202 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 22, 22, 22, 1, 1, 1] [2022-10-16 05:31:39,248 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 05:31:39,415 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,SelfDestructingSolverStorable14 [2022-10-16 05:31:39,415 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-16 05:31:39,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:31:39,416 INFO L85 PathProgramCache]: Analyzing trace with hash 65225397, now seen corresponding path program 4 times [2022-10-16 05:31:39,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:31:39,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116218008] [2022-10-16 05:31:39,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:31:39,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:31:39,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:31:41,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 0 proven. 2233 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:31:41,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:31:41,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116218008] [2022-10-16 05:31:41,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116218008] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:31:41,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107027661] [2022-10-16 05:31:41,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-16 05:31:41,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:31:41,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:31:41,795 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 05:31:41,812 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 05:31:50,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-16 05:31:50,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:31:50,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 53 conjunts are in the unsatisfiable core [2022-10-16 05:31:50,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:31:50,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 05:31:50,405 INFO L356 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-10-16 05:31:50,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2022-10-16 05:31:50,425 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2022-10-16 05:31:52,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 0 proven. 2233 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:31:52,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:31:54,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 0 proven. 2233 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:31:54,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107027661] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:31:54,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:31:54,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 69 [2022-10-16 05:31:54,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937067961] [2022-10-16 05:31:54,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:31:54,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-10-16 05:31:54,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:31:54,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-10-16 05:31:54,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1194, Invalid=3636, Unknown=0, NotChecked=0, Total=4830 [2022-10-16 05:31:54,439 INFO L87 Difference]: Start difference. First operand 11394 states and 12821 transitions. Second operand has 70 states, 69 states have (on average 8.855072463768115) internal successors, (611), 70 states have internal predecessors, (611), 0 states have call successors, (0), 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 05:32:06,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:32:06,911 INFO L93 Difference]: Finished difference Result 55172 states and 66183 transitions. [2022-10-16 05:32:06,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-10-16 05:32:06,912 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 8.855072463768115) internal successors, (611), 70 states have internal predecessors, (611), 0 states have call successors, (0), 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 207 [2022-10-16 05:32:06,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:32:07,047 INFO L225 Difference]: With dead ends: 55172 [2022-10-16 05:32:07,047 INFO L226 Difference]: Without dead ends: 55172 [2022-10-16 05:32:07,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2442 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=2734, Invalid=5638, Unknown=0, NotChecked=0, Total=8372 [2022-10-16 05:32:07,052 INFO L413 NwaCegarLoop]: 634 mSDtfsCounter, 13773 mSDsluCounter, 14217 mSDsCounter, 0 mSdLazyCounter, 14698 mSolverCounterSat, 1090 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13821 SdHoareTripleChecker+Valid, 14851 SdHoareTripleChecker+Invalid, 15788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1090 IncrementalHoareTripleChecker+Valid, 14698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-10-16 05:32:07,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13821 Valid, 14851 Invalid, 15788 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1090 Valid, 14698 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2022-10-16 05:32:07,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55172 states. [2022-10-16 05:32:07,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55172 to 17406. [2022-10-16 05:32:07,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17406 states, 17396 states have (on average 1.1203150149459646) internal successors, (19489), 17402 states have internal predecessors, (19489), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 05:32:07,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17406 states to 17406 states and 19493 transitions. [2022-10-16 05:32:07,629 INFO L78 Accepts]: Start accepts. Automaton has 17406 states and 19493 transitions. Word has length 207 [2022-10-16 05:32:07,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:32:07,630 INFO L495 AbstractCegarLoop]: Abstraction has 17406 states and 19493 transitions. [2022-10-16 05:32:07,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 8.855072463768115) internal successors, (611), 70 states have internal predecessors, (611), 0 states have call successors, (0), 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 05:32:07,631 INFO L276 IsEmpty]: Start isEmpty. Operand 17406 states and 19493 transitions. [2022-10-16 05:32:07,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2022-10-16 05:32:07,662 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:32:07,663 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 62, 62, 62, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:32:07,707 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 05:32:07,877 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,SelfDestructingSolverStorable15 [2022-10-16 05:32:07,878 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-16 05:32:07,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:32:07,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1616147324, now seen corresponding path program 3 times [2022-10-16 05:32:07,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:32:07,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253393434] [2022-10-16 05:32:07,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:32:07,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:32:08,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:32:13,148 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 05:32:13,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:32:13,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253393434] [2022-10-16 05:32:13,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253393434] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:32:13,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64752108] [2022-10-16 05:32:13,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 05:32:13,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:32:13,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:32:13,153 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 05:32:13,154 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 05:32:13,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-16 05:32:13,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:32:13,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-16 05:32:13,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:32:13,884 INFO L134 CoverageAnalysis]: Checked inductivity of 11410 backedges. 306 proven. 2 refuted. 0 times theorem prover too weak. 11102 trivial. 0 not checked. [2022-10-16 05:32:13,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:32:14,281 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 7 treesize of output 5 [2022-10-16 05:32:14,830 INFO L134 CoverageAnalysis]: Checked inductivity of 11410 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 11102 trivial. 0 not checked. [2022-10-16 05:32:14,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64752108] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:32:14,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:32:14,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 7, 7] total 77 [2022-10-16 05:32:14,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579153089] [2022-10-16 05:32:14,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:32:14,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-10-16 05:32:14,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:32:14,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-10-16 05:32:14,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2394, Invalid=3458, Unknown=0, NotChecked=0, Total=5852 [2022-10-16 05:32:14,837 INFO L87 Difference]: Start difference. First operand 17406 states and 19493 transitions. Second operand has 77 states, 77 states have (on average 5.467532467532467) internal successors, (421), 77 states have internal predecessors, (421), 0 states have call successors, (0), 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 05:32:22,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:32:22,940 INFO L93 Difference]: Finished difference Result 18872 states and 21132 transitions. [2022-10-16 05:32:22,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-10-16 05:32:22,941 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 5.467532467532467) internal successors, (421), 77 states have internal predecessors, (421), 0 states have call successors, (0), 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 382 [2022-10-16 05:32:22,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:32:22,969 INFO L225 Difference]: With dead ends: 18872 [2022-10-16 05:32:22,970 INFO L226 Difference]: Without dead ends: 18872 [2022-10-16 05:32:22,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 892 GetRequests, 752 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3005 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=7269, Invalid=12753, Unknown=0, NotChecked=0, Total=20022 [2022-10-16 05:32:22,977 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 9624 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 1008 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9624 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 1949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1008 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-10-16 05:32:22,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9624 Valid, 623 Invalid, 1949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1008 Valid, 941 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-10-16 05:32:22,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18872 states. [2022-10-16 05:32:23,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18872 to 17840. [2022-10-16 05:32:23,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17840 states, 17831 states have (on average 1.119903538780775) internal successors, (19969), 17836 states have internal predecessors, (19969), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 05:32:23,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17840 states to 17840 states and 19973 transitions. [2022-10-16 05:32:23,237 INFO L78 Accepts]: Start accepts. Automaton has 17840 states and 19973 transitions. Word has length 382 [2022-10-16 05:32:23,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:32:23,238 INFO L495 AbstractCegarLoop]: Abstraction has 17840 states and 19973 transitions. [2022-10-16 05:32:23,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 5.467532467532467) internal successors, (421), 77 states have internal predecessors, (421), 0 states have call successors, (0), 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 05:32:23,238 INFO L276 IsEmpty]: Start isEmpty. Operand 17840 states and 19973 transitions. [2022-10-16 05:32:23,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2022-10-16 05:32:23,269 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:32:23,269 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 63, 63, 63, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:32:23,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-10-16 05:32:23,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-10-16 05:32:23,485 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-16 05:32:23,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:32:23,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1516332584, now seen corresponding path program 1 times [2022-10-16 05:32:23,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:32:23,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130248021] [2022-10-16 05:32:23,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:32:23,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:32:23,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:32:28,791 INFO L134 CoverageAnalysis]: Checked inductivity of 11786 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-16 05:32:28,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:32:28,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130248021] [2022-10-16 05:32:28,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130248021] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:32:28,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75011510] [2022-10-16 05:32:28,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:32:28,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:32:28,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:32:28,795 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:32:28,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-10-16 05:32:29,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:32:29,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 1433 conjuncts, 65 conjunts are in the unsatisfiable core [2022-10-16 05:32:29,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:32:29,635 INFO L134 CoverageAnalysis]: Checked inductivity of 11786 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-16 05:32:29,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:32:35,601 INFO L134 CoverageAnalysis]: Checked inductivity of 11786 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-16 05:32:35,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75011510] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:32:35,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:32:35,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 131 [2022-10-16 05:32:35,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552744482] [2022-10-16 05:32:35,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:32:35,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-10-16 05:32:35,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:32:35,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-10-16 05:32:35,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2022-10-16 05:32:35,614 INFO L87 Difference]: Start difference. First operand 17840 states and 19973 transitions. Second operand has 131 states, 131 states have (on average 5.931297709923665) internal successors, (777), 131 states have internal predecessors, (777), 0 states have call successors, (0), 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 05:32:51,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:32:51,309 INFO L93 Difference]: Finished difference Result 46322 states and 51563 transitions. [2022-10-16 05:32:51,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-10-16 05:32:51,310 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 5.931297709923665) internal successors, (777), 131 states have internal predecessors, (777), 0 states have call successors, (0), 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 394 [2022-10-16 05:32:51,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:32:51,377 INFO L225 Difference]: With dead ends: 46322 [2022-10-16 05:32:51,377 INFO L226 Difference]: Without dead ends: 46322 [2022-10-16 05:32:51,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 852 GetRequests, 723 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2022-10-16 05:32:51,381 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 8060 mSDsluCounter, 1459 mSDsCounter, 0 mSdLazyCounter, 1162 mSolverCounterSat, 728 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8060 SdHoareTripleChecker+Valid, 1500 SdHoareTripleChecker+Invalid, 1890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 728 IncrementalHoareTripleChecker+Valid, 1162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-10-16 05:32:51,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8060 Valid, 1500 Invalid, 1890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [728 Valid, 1162 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-10-16 05:32:51,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46322 states. [2022-10-16 05:32:52,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46322 to 46115. [2022-10-16 05:32:52,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46115 states, 46106 states have (on average 1.1182709408753742) internal successors, (51559), 46111 states have internal predecessors, (51559), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 05:32:52,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46115 states to 46115 states and 51563 transitions. [2022-10-16 05:32:52,353 INFO L78 Accepts]: Start accepts. Automaton has 46115 states and 51563 transitions. Word has length 394 [2022-10-16 05:32:52,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:32:52,354 INFO L495 AbstractCegarLoop]: Abstraction has 46115 states and 51563 transitions. [2022-10-16 05:32:52,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 5.931297709923665) internal successors, (777), 131 states have internal predecessors, (777), 0 states have call successors, (0), 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 05:32:52,354 INFO L276 IsEmpty]: Start isEmpty. Operand 46115 states and 51563 transitions. [2022-10-16 05:32:52,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2022-10-16 05:32:52,389 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:32:52,389 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 46, 46, 46, 1, 1, 1] [2022-10-16 05:32:52,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-10-16 05:32:52,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-10-16 05:32:52,602 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-16 05:32:52,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:32:52,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1574700213, now seen corresponding path program 5 times [2022-10-16 05:32:52,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:32:52,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355800785] [2022-10-16 05:32:52,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:32:52,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:32:52,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:32:58,191 INFO L134 CoverageAnalysis]: Checked inductivity of 9637 backedges. 0 proven. 9637 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:32:58,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:32:58,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355800785] [2022-10-16 05:32:58,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355800785] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:32:58,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399516829] [2022-10-16 05:32:58,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-10-16 05:32:58,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:32:58,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:32:58,197 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 05:32:58,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process