/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/ldv-regression/test23-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-16 01:33:51,000 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-16 01:33:51,003 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-16 01:33:51,038 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-10-16 01:33:51,123 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-16 01:33:51,124 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-16 01:33:51,126 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-16 01:33:51,127 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 01:33:51,181 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-16 01:33:51,181 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-16 01:33:51,182 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-16 01:33:51,182 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-16 01:33:51,184 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-16 01:33:51,184 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-16 01:33:51,187 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-16 01:33:51,187 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-16 01:33:51,187 INFO L138 SettingsManager]: * Use SBE=true [2022-10-16 01:33:51,188 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-16 01:33:51,189 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-16 01:33:51,189 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-16 01:33:51,189 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-16 01:33:51,189 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-16 01:33:51,190 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-16 01:33:51,190 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-16 01:33:51,190 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-16 01:33:51,190 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-16 01:33:51,190 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-16 01:33:51,190 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-16 01:33:51,191 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-16 01:33:51,191 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-16 01:33:51,191 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-16 01:33:51,191 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-16 01:33:51,191 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-16 01:33:51,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 01:33:51,192 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-16 01:33:51,192 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-16 01:33:51,192 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-16 01:33:51,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-16 01:33:51,193 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-16 01:33:51,643 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-16 01:33:51,669 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-16 01:33:51,672 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-16 01:33:51,673 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-16 01:33:51,674 INFO L275 PluginConnector]: CDTParser initialized [2022-10-16 01:33:51,676 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test23-2.c [2022-10-16 01:33:51,753 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a72294851/83abcd06fd0e497f931b9f5393ef725d/FLAGff2a19be5 [2022-10-16 01:33:52,348 INFO L306 CDTParser]: Found 1 translation units. [2022-10-16 01:33:52,349 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test23-2.c [2022-10-16 01:33:52,356 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a72294851/83abcd06fd0e497f931b9f5393ef725d/FLAGff2a19be5 [2022-10-16 01:33:52,709 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a72294851/83abcd06fd0e497f931b9f5393ef725d [2022-10-16 01:33:52,718 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-16 01:33:52,726 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-16 01:33:52,728 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-16 01:33:52,729 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-16 01:33:52,733 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-16 01:33:52,735 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 01:33:52" (1/1) ... [2022-10-16 01:33:52,736 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c24dea5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:33:52, skipping insertion in model container [2022-10-16 01:33:52,736 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 01:33:52" (1/1) ... [2022-10-16 01:33:52,745 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-16 01:33:52,762 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-16 01:33:52,947 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/ldv-regression/test23-2.c[1070,1083] [2022-10-16 01:33:52,950 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 01:33:52,962 INFO L203 MainTranslator]: Completed pre-run [2022-10-16 01:33:52,984 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/ldv-regression/test23-2.c[1070,1083] [2022-10-16 01:33:52,985 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 01:33:53,003 INFO L208 MainTranslator]: Completed translation [2022-10-16 01:33:53,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:33:53 WrapperNode [2022-10-16 01:33:53,003 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-16 01:33:53,005 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-16 01:33:53,005 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-16 01:33:53,005 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-16 01:33:53,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:33:53" (1/1) ... [2022-10-16 01:33:53,024 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:33:53" (1/1) ... [2022-10-16 01:33:53,049 INFO L138 Inliner]: procedures = 16, calls = 21, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2022-10-16 01:33:53,050 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-16 01:33:53,051 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-16 01:33:53,051 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-16 01:33:53,051 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-16 01:33:53,062 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:33:53" (1/1) ... [2022-10-16 01:33:53,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:33:53" (1/1) ... [2022-10-16 01:33:53,065 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:33:53" (1/1) ... [2022-10-16 01:33:53,065 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:33:53" (1/1) ... [2022-10-16 01:33:53,072 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:33:53" (1/1) ... [2022-10-16 01:33:53,077 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:33:53" (1/1) ... [2022-10-16 01:33:53,079 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:33:53" (1/1) ... [2022-10-16 01:33:53,080 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:33:53" (1/1) ... [2022-10-16 01:33:53,083 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-16 01:33:53,084 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-16 01:33:53,084 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-16 01:33:53,084 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-16 01:33:53,085 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:33:53" (1/1) ... [2022-10-16 01:33:53,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 01:33:53,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 01:33:53,133 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 01:33:53,143 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 01:33:53,213 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-16 01:33:53,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-16 01:33:53,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-16 01:33:53,213 INFO L130 BoogieDeclarations]: Found specification of procedure get_dummy [2022-10-16 01:33:53,214 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dummy [2022-10-16 01:33:53,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-16 01:33:53,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-16 01:33:53,215 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-16 01:33:53,375 INFO L235 CfgBuilder]: Building ICFG [2022-10-16 01:33:53,381 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-16 01:33:53,707 INFO L276 CfgBuilder]: Performing block encoding [2022-10-16 01:33:53,715 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-16 01:33:53,716 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-16 01:33:53,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 01:33:53 BoogieIcfgContainer [2022-10-16 01:33:53,719 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-16 01:33:53,721 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-16 01:33:53,722 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-16 01:33:53,726 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-16 01:33:53,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 01:33:52" (1/3) ... [2022-10-16 01:33:53,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c298907 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 01:33:53, skipping insertion in model container [2022-10-16 01:33:53,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:33:53" (2/3) ... [2022-10-16 01:33:53,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c298907 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 01:33:53, skipping insertion in model container [2022-10-16 01:33:53,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 01:33:53" (3/3) ... [2022-10-16 01:33:53,730 INFO L112 eAbstractionObserver]: Analyzing ICFG test23-2.c [2022-10-16 01:33:53,771 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-16 01:33:53,771 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2022-10-16 01:33:53,833 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-16 01:33:53,843 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;@6953fdc1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-16 01:33:53,844 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2022-10-16 01:33:53,849 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 32 states have (on average 1.71875) internal successors, (55), 50 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 01:33:53,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-10-16 01:33:53,857 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 01:33:53,858 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-10-16 01:33:53,859 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-16 01:33:53,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 01:33:53,866 INFO L85 PathProgramCache]: Analyzing trace with hash 37801, now seen corresponding path program 1 times [2022-10-16 01:33:53,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 01:33:53,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185012597] [2022-10-16 01:33:53,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 01:33:53,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 01:33:54,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:33:54,258 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 01:33:54,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 01:33:54,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185012597] [2022-10-16 01:33:54,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185012597] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 01:33:54,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 01:33:54,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-16 01:33:54,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143062303] [2022-10-16 01:33:54,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 01:33:54,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 01:33:54,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 01:33:54,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 01:33:54,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 01:33:54,320 INFO L87 Difference]: Start difference. First operand has 54 states, 32 states have (on average 1.71875) internal successors, (55), 50 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) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 01:33:54,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 01:33:54,388 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2022-10-16 01:33:54,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 01:33:54,392 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2022-10-16 01:33:54,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 01:33:54,400 INFO L225 Difference]: With dead ends: 52 [2022-10-16 01:33:54,401 INFO L226 Difference]: Without dead ends: 50 [2022-10-16 01:33:54,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 01:33:54,408 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 53 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 01:33:54,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 35 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 01:33:54,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-10-16 01:33:54,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-10-16 01:33:54,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 46 states have internal predecessors, (49), 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 01:33:54,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2022-10-16 01:33:54,459 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 3 [2022-10-16 01:33:54,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 01:33:54,459 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2022-10-16 01:33:54,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 01:33:54,460 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2022-10-16 01:33:54,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-10-16 01:33:54,460 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 01:33:54,461 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-10-16 01:33:54,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-16 01:33:54,461 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-16 01:33:54,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 01:33:54,462 INFO L85 PathProgramCache]: Analyzing trace with hash 37802, now seen corresponding path program 1 times [2022-10-16 01:33:54,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 01:33:54,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150630408] [2022-10-16 01:33:54,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 01:33:54,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 01:33:54,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:33:54,634 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 01:33:54,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 01:33:54,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150630408] [2022-10-16 01:33:54,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150630408] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 01:33:54,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 01:33:54,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-16 01:33:54,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334738542] [2022-10-16 01:33:54,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 01:33:54,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 01:33:54,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 01:33:54,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 01:33:54,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 01:33:54,639 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 01:33:54,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 01:33:54,672 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2022-10-16 01:33:54,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 01:33:54,673 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2022-10-16 01:33:54,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 01:33:54,674 INFO L225 Difference]: With dead ends: 48 [2022-10-16 01:33:54,675 INFO L226 Difference]: Without dead ends: 48 [2022-10-16 01:33:54,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 01:33:54,677 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 01:33:54,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 36 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 01:33:54,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-10-16 01:33:54,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-10-16 01:33:54,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 44 states have internal predecessors, (47), 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 01:33:54,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2022-10-16 01:33:54,686 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 3 [2022-10-16 01:33:54,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 01:33:54,686 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2022-10-16 01:33:54,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 01:33:54,687 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2022-10-16 01:33:54,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-16 01:33:54,687 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 01:33:54,687 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-16 01:33:54,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-16 01:33:54,688 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-16 01:33:54,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 01:33:54,689 INFO L85 PathProgramCache]: Analyzing trace with hash 549787499, now seen corresponding path program 1 times [2022-10-16 01:33:54,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 01:33:54,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641944294] [2022-10-16 01:33:54,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 01:33:54,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 01:33:54,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:33:54,780 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 01:33:54,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 01:33:54,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641944294] [2022-10-16 01:33:54,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641944294] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 01:33:54,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 01:33:54,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-16 01:33:54,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264828521] [2022-10-16 01:33:54,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 01:33:54,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 01:33:54,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 01:33:54,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 01:33:54,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 01:33:54,784 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 01:33:54,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 01:33:54,816 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2022-10-16 01:33:54,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 01:33:54,817 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-16 01:33:54,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 01:33:54,818 INFO L225 Difference]: With dead ends: 46 [2022-10-16 01:33:54,819 INFO L226 Difference]: Without dead ends: 46 [2022-10-16 01:33:54,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 01:33:54,821 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 43 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 32 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 01:33:54,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 32 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 01:33:54,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-10-16 01:33:54,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-10-16 01:33:54,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 42 states have internal predecessors, (45), 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 01:33:54,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2022-10-16 01:33:54,829 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 7 [2022-10-16 01:33:54,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 01:33:54,830 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2022-10-16 01:33:54,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 01:33:54,830 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2022-10-16 01:33:54,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-16 01:33:54,831 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 01:33:54,831 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-16 01:33:54,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-16 01:33:54,832 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-16 01:33:54,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 01:33:54,832 INFO L85 PathProgramCache]: Analyzing trace with hash 549787500, now seen corresponding path program 1 times [2022-10-16 01:33:54,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 01:33:54,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032299591] [2022-10-16 01:33:54,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 01:33:54,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 01:33:54,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:33:55,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 01:33:55,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 01:33:55,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032299591] [2022-10-16 01:33:55,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032299591] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 01:33:55,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 01:33:55,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-16 01:33:55,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721585028] [2022-10-16 01:33:55,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 01:33:55,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 01:33:55,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 01:33:55,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 01:33:55,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 01:33:55,050 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 01:33:55,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 01:33:55,077 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2022-10-16 01:33:55,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 01:33:55,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-16 01:33:55,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 01:33:55,079 INFO L225 Difference]: With dead ends: 44 [2022-10-16 01:33:55,079 INFO L226 Difference]: Without dead ends: 44 [2022-10-16 01:33:55,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 01:33:55,082 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 41 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 01:33:55,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 34 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 01:33:55,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-10-16 01:33:55,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-10-16 01:33:55,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 40 states have internal predecessors, (43), 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 01:33:55,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2022-10-16 01:33:55,089 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 7 [2022-10-16 01:33:55,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 01:33:55,090 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2022-10-16 01:33:55,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 01:33:55,091 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2022-10-16 01:33:55,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-16 01:33:55,092 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 01:33:55,092 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 01:33:55,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-16 01:33:55,093 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-16 01:33:55,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 01:33:55,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1178367493, now seen corresponding path program 1 times [2022-10-16 01:33:55,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 01:33:55,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002870608] [2022-10-16 01:33:55,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 01:33:55,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 01:33:55,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:33:55,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-16 01:33:55,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:33:55,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 01:33:55,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:33:55,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 01:33:55,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 01:33:55,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002870608] [2022-10-16 01:33:55,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002870608] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 01:33:55,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 01:33:55,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-16 01:33:55,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465542454] [2022-10-16 01:33:55,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 01:33:55,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-16 01:33:55,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 01:33:55,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-16 01:33:55,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-16 01:33:55,301 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 01:33:55,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 01:33:55,482 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2022-10-16 01:33:55,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-16 01:33:55,483 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-10-16 01:33:55,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 01:33:55,490 INFO L225 Difference]: With dead ends: 53 [2022-10-16 01:33:55,491 INFO L226 Difference]: Without dead ends: 53 [2022-10-16 01:33:55,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-10-16 01:33:55,497 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 64 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 01:33:55,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 93 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 01:33:55,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-10-16 01:33:55,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2022-10-16 01:33:55,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 44 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-16 01:33:55,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-10-16 01:33:55,523 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 25 [2022-10-16 01:33:55,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 01:33:55,523 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-10-16 01:33:55,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 01:33:55,524 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-10-16 01:33:55,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-16 01:33:55,525 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 01:33:55,525 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 01:33:55,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-16 01:33:55,527 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-16 01:33:55,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 01:33:55,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1178367494, now seen corresponding path program 1 times [2022-10-16 01:33:55,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 01:33:55,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226530525] [2022-10-16 01:33:55,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 01:33:55,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 01:33:55,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:33:55,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-16 01:33:55,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:33:55,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 01:33:55,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:33:55,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 01:33:55,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 01:33:55,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226530525] [2022-10-16 01:33:55,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226530525] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 01:33:55,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 01:33:55,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-16 01:33:55,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779892263] [2022-10-16 01:33:55,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 01:33:55,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-16 01:33:55,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 01:33:55,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-16 01:33:55,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-10-16 01:33:55,999 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 01:33:56,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 01:33:56,198 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2022-10-16 01:33:56,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-16 01:33:56,199 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-10-16 01:33:56,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 01:33:56,200 INFO L225 Difference]: With dead ends: 68 [2022-10-16 01:33:56,200 INFO L226 Difference]: Without dead ends: 68 [2022-10-16 01:33:56,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-10-16 01:33:56,202 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 78 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 01:33:56,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 129 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 01:33:56,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-10-16 01:33:56,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2022-10-16 01:33:56,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 46 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-16 01:33:56,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2022-10-16 01:33:56,210 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 25 [2022-10-16 01:33:56,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 01:33:56,210 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2022-10-16 01:33:56,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 01:33:56,211 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2022-10-16 01:33:56,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-16 01:33:56,212 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 01:33:56,212 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 01:33:56,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-16 01:33:56,213 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-16 01:33:56,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 01:33:56,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1341592441, now seen corresponding path program 1 times [2022-10-16 01:33:56,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 01:33:56,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762466449] [2022-10-16 01:33:56,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 01:33:56,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 01:33:56,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:33:56,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-16 01:33:56,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:33:56,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 01:33:56,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:33:56,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 01:33:56,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 01:33:56,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762466449] [2022-10-16 01:33:56,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762466449] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 01:33:56,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673269516] [2022-10-16 01:33:56,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 01:33:56,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 01:33:56,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 01:33:56,387 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 01:33:56,393 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 01:33:56,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:33:56,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-16 01:33:56,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 01:33:56,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 01:33:56,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 01:33:57,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 01:33:57,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673269516] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 01:33:57,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 01:33:57,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2022-10-16 01:33:57,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513540951] [2022-10-16 01:33:57,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 01:33:57,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-10-16 01:33:57,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 01:33:57,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-10-16 01:33:57,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2022-10-16 01:33:57,201 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 30 states, 27 states have (on average 2.259259259259259) internal successors, (61), 22 states have internal predecessors, (61), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-16 01:33:57,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 01:33:57,581 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2022-10-16 01:33:57,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-16 01:33:57,582 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.259259259259259) internal successors, (61), 22 states have internal predecessors, (61), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 25 [2022-10-16 01:33:57,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 01:33:57,583 INFO L225 Difference]: With dead ends: 80 [2022-10-16 01:33:57,583 INFO L226 Difference]: Without dead ends: 80 [2022-10-16 01:33:57,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=173, Invalid=1233, Unknown=0, NotChecked=0, Total=1406 [2022-10-16 01:33:57,585 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 94 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 01:33:57,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 584 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 01:33:57,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-10-16 01:33:57,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 55. [2022-10-16 01:33:57,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 48 states have internal predecessors, (53), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-10-16 01:33:57,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2022-10-16 01:33:57,592 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 25 [2022-10-16 01:33:57,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 01:33:57,593 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2022-10-16 01:33:57,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.259259259259259) internal successors, (61), 22 states have internal predecessors, (61), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-16 01:33:57,594 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2022-10-16 01:33:57,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-16 01:33:57,595 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 01:33:57,595 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 01:33:57,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-16 01:33:57,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 01:33:57,810 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-16 01:33:57,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 01:33:57,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1928398455, now seen corresponding path program 1 times [2022-10-16 01:33:57,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 01:33:57,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586227157] [2022-10-16 01:33:57,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 01:33:57,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 01:33:57,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:33:57,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-16 01:33:57,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:33:57,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 01:33:57,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:33:57,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 01:33:57,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 01:33:57,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586227157] [2022-10-16 01:33:57,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586227157] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 01:33:57,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 01:33:57,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-16 01:33:57,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199128550] [2022-10-16 01:33:57,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 01:33:57,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-16 01:33:57,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 01:33:57,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-16 01:33:57,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-16 01:33:57,935 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 01:33:58,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 01:33:58,036 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2022-10-16 01:33:58,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-16 01:33:58,037 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-10-16 01:33:58,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 01:33:58,038 INFO L225 Difference]: With dead ends: 57 [2022-10-16 01:33:58,038 INFO L226 Difference]: Without dead ends: 57 [2022-10-16 01:33:58,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-10-16 01:33:58,039 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 59 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 01:33:58,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 117 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 01:33:58,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-10-16 01:33:58,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2022-10-16 01:33:58,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 47 states have internal predecessors, (52), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-10-16 01:33:58,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2022-10-16 01:33:58,046 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 25 [2022-10-16 01:33:58,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 01:33:58,047 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2022-10-16 01:33:58,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 01:33:58,047 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2022-10-16 01:33:58,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-16 01:33:58,048 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 01:33:58,048 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 01:33:58,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-16 01:33:58,049 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-16 01:33:58,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 01:33:58,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1928398454, now seen corresponding path program 1 times [2022-10-16 01:33:58,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 01:33:58,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396031277] [2022-10-16 01:33:58,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 01:33:58,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 01:33:58,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:33:58,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-16 01:33:58,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:33:58,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 01:33:58,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:33:58,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 01:33:58,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 01:33:58,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396031277] [2022-10-16 01:33:58,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396031277] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 01:33:58,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 01:33:58,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-16 01:33:58,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972663825] [2022-10-16 01:33:58,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 01:33:58,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-16 01:33:58,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 01:33:58,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-16 01:33:58,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-10-16 01:33:58,286 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 01:33:58,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 01:33:58,496 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2022-10-16 01:33:58,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-16 01:33:58,497 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-10-16 01:33:58,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 01:33:58,498 INFO L225 Difference]: With dead ends: 69 [2022-10-16 01:33:58,498 INFO L226 Difference]: Without dead ends: 69 [2022-10-16 01:33:58,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-10-16 01:33:58,500 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 52 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 01:33:58,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 212 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 01:33:58,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-10-16 01:33:58,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 47. [2022-10-16 01:33:58,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 41 states have internal predecessors, (44), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-10-16 01:33:58,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2022-10-16 01:33:58,506 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 25 [2022-10-16 01:33:58,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 01:33:58,507 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2022-10-16 01:33:58,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 01:33:58,507 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2022-10-16 01:33:58,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-10-16 01:33:58,508 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 01:33:58,509 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 01:33:58,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-16 01:33:58,509 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-16 01:33:58,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 01:33:58,510 INFO L85 PathProgramCache]: Analyzing trace with hash -2125276598, now seen corresponding path program 1 times [2022-10-16 01:33:58,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 01:33:58,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634838704] [2022-10-16 01:33:58,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 01:33:58,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 01:33:58,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:33:58,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-16 01:33:58,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:33:58,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 01:33:58,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:33:58,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-16 01:33:58,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 01:33:58,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634838704] [2022-10-16 01:33:58,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634838704] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 01:33:58,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 01:33:58,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 01:33:58,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80058239] [2022-10-16 01:33:58,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 01:33:58,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 01:33:58,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 01:33:58,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 01:33:58,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 01:33:58,559 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 3 states, 2 states have (on average 9.5) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 01:33:58,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 01:33:58,575 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2022-10-16 01:33:58,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 01:33:58,575 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.5) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-10-16 01:33:58,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 01:33:58,576 INFO L225 Difference]: With dead ends: 46 [2022-10-16 01:33:58,576 INFO L226 Difference]: Without dead ends: 42 [2022-10-16 01:33:58,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 01:33:58,578 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 19 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 01:33:58,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 36 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 01:33:58,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-10-16 01:33:58,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-10-16 01:33:58,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 32 states have (on average 1.1875) internal successors, (38), 37 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-10-16 01:33:58,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-10-16 01:33:58,584 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 26 [2022-10-16 01:33:58,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 01:33:58,584 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-10-16 01:33:58,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.5) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 01:33:58,585 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-10-16 01:33:58,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-10-16 01:33:58,586 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 01:33:58,586 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 01:33:58,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-10-16 01:33:58,587 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-16 01:33:58,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 01:33:58,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1197222411, now seen corresponding path program 1 times [2022-10-16 01:33:58,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 01:33:58,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19973973] [2022-10-16 01:33:58,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 01:33:58,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 01:33:58,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:33:58,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-16 01:33:58,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:33:58,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 01:33:58,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:33:58,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 01:33:58,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 01:33:58,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19973973] [2022-10-16 01:33:58,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19973973] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 01:33:58,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182821752] [2022-10-16 01:33:58,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 01:33:58,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 01:33:58,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 01:33:58,728 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 01:33:58,730 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 01:33:58,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:33:58,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2022-10-16 01:33:58,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 01:33:58,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 01:33:58,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 01:33:59,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 01:33:59,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182821752] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 01:33:59,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 01:33:59,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-10-16 01:33:59,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612137466] [2022-10-16 01:33:59,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 01:33:59,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-10-16 01:33:59,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 01:33:59,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-10-16 01:33:59,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-10-16 01:33:59,055 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 19 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-10-16 01:33:59,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 01:33:59,287 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2022-10-16 01:33:59,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-16 01:33:59,287 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 29 [2022-10-16 01:33:59,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 01:33:59,288 INFO L225 Difference]: With dead ends: 62 [2022-10-16 01:33:59,289 INFO L226 Difference]: Without dead ends: 62 [2022-10-16 01:33:59,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-10-16 01:33:59,290 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 149 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 01:33:59,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 226 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 01:33:59,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-10-16 01:33:59,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 49. [2022-10-16 01:33:59,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 43 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-10-16 01:33:59,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2022-10-16 01:33:59,296 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 29 [2022-10-16 01:33:59,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 01:33:59,296 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2022-10-16 01:33:59,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-10-16 01:33:59,296 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2022-10-16 01:33:59,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-10-16 01:33:59,298 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 01:33:59,298 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 01:33:59,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-10-16 01:33:59,513 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,SelfDestructingSolverStorable10 [2022-10-16 01:33:59,514 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-16 01:33:59,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 01:33:59,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1197222412, now seen corresponding path program 1 times [2022-10-16 01:33:59,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 01:33:59,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553043639] [2022-10-16 01:33:59,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 01:33:59,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 01:33:59,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:33:59,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-16 01:33:59,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:33:59,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 01:33:59,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:33:59,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 01:33:59,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 01:33:59,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553043639] [2022-10-16 01:33:59,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553043639] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 01:33:59,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588310750] [2022-10-16 01:33:59,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 01:33:59,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 01:33:59,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 01:33:59,801 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 01:33:59,811 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 01:33:59,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:33:59,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-10-16 01:33:59,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 01:34:00,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 01:34:00,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 01:34:00,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 01:34:00,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588310750] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 01:34:00,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 01:34:00,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2022-10-16 01:34:00,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388280929] [2022-10-16 01:34:00,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 01:34:00,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-10-16 01:34:00,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 01:34:00,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-10-16 01:34:00,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-10-16 01:34:00,524 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 24 states, 23 states have (on average 3.130434782608696) internal successors, (72), 21 states have internal predecessors, (72), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-16 01:34:00,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 01:34:00,969 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2022-10-16 01:34:00,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-16 01:34:00,969 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.130434782608696) internal successors, (72), 21 states have internal predecessors, (72), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 29 [2022-10-16 01:34:00,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 01:34:00,970 INFO L225 Difference]: With dead ends: 60 [2022-10-16 01:34:00,971 INFO L226 Difference]: Without dead ends: 60 [2022-10-16 01:34:00,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2022-10-16 01:34:00,972 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 161 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 01:34:00,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 220 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 01:34:00,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-10-16 01:34:00,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2022-10-16 01:34:00,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 43 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-10-16 01:34:00,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2022-10-16 01:34:00,981 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 29 [2022-10-16 01:34:00,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 01:34:00,981 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2022-10-16 01:34:00,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.130434782608696) internal successors, (72), 21 states have internal predecessors, (72), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-16 01:34:00,982 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2022-10-16 01:34:00,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-10-16 01:34:00,983 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 01:34:00,983 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 01:34:01,017 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 01:34:01,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 01:34:01,199 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-16 01:34:01,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 01:34:01,200 INFO L85 PathProgramCache]: Analyzing trace with hash -391125491, now seen corresponding path program 1 times [2022-10-16 01:34:01,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 01:34:01,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552945428] [2022-10-16 01:34:01,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 01:34:01,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 01:34:01,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:01,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-16 01:34:01,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:01,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 01:34:01,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:01,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 01:34:01,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 01:34:01,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552945428] [2022-10-16 01:34:01,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552945428] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 01:34:01,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997433363] [2022-10-16 01:34:01,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 01:34:01,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 01:34:01,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 01:34:01,361 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 01:34:01,382 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 01:34:01,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:01,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-16 01:34:01,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 01:34:01,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 01:34:01,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 01:34:01,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 01:34:01,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997433363] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 01:34:01,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 01:34:01,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2022-10-16 01:34:01,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936044701] [2022-10-16 01:34:01,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 01:34:01,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-10-16 01:34:01,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 01:34:01,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-10-16 01:34:01,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2022-10-16 01:34:01,901 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 30 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 22 states have internal predecessors, (65), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-16 01:34:02,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 01:34:02,226 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2022-10-16 01:34:02,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-16 01:34:02,227 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 22 states have internal predecessors, (65), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 29 [2022-10-16 01:34:02,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 01:34:02,228 INFO L225 Difference]: With dead ends: 62 [2022-10-16 01:34:02,228 INFO L226 Difference]: Without dead ends: 60 [2022-10-16 01:34:02,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=173, Invalid=1233, Unknown=0, NotChecked=0, Total=1406 [2022-10-16 01:34:02,230 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 119 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 01:34:02,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 675 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 01:34:02,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-10-16 01:34:02,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2022-10-16 01:34:02,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 43 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-16 01:34:02,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2022-10-16 01:34:02,234 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 29 [2022-10-16 01:34:02,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 01:34:02,234 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2022-10-16 01:34:02,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 22 states have internal predecessors, (65), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-16 01:34:02,235 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2022-10-16 01:34:02,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-10-16 01:34:02,236 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 01:34:02,236 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 01:34:02,273 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 01:34:02,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 01:34:02,446 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-16 01:34:02,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 01:34:02,446 INFO L85 PathProgramCache]: Analyzing trace with hash 309939087, now seen corresponding path program 1 times [2022-10-16 01:34:02,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 01:34:02,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435069308] [2022-10-16 01:34:02,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 01:34:02,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 01:34:02,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:02,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-16 01:34:02,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:02,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 01:34:02,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:02,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 01:34:02,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 01:34:02,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435069308] [2022-10-16 01:34:02,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435069308] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 01:34:02,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271951846] [2022-10-16 01:34:02,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 01:34:02,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 01:34:02,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 01:34:02,586 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 01:34:02,608 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 01:34:02,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:02,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjunts are in the unsatisfiable core [2022-10-16 01:34:02,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 01:34:02,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 01:34:02,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 01:34:02,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 01:34:02,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271951846] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 01:34:02,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 01:34:02,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-10-16 01:34:02,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355656227] [2022-10-16 01:34:02,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 01:34:02,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-10-16 01:34:02,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 01:34:02,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-10-16 01:34:02,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-10-16 01:34:02,902 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 19 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-10-16 01:34:03,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 01:34:03,144 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2022-10-16 01:34:03,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-16 01:34:03,145 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 29 [2022-10-16 01:34:03,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 01:34:03,146 INFO L225 Difference]: With dead ends: 60 [2022-10-16 01:34:03,146 INFO L226 Difference]: Without dead ends: 60 [2022-10-16 01:34:03,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-10-16 01:34:03,147 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 114 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 01:34:03,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 281 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 01:34:03,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-10-16 01:34:03,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 48. [2022-10-16 01:34:03,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 42 states have internal predecessors, (44), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-16 01:34:03,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2022-10-16 01:34:03,151 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 29 [2022-10-16 01:34:03,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 01:34:03,152 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2022-10-16 01:34:03,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-10-16 01:34:03,152 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2022-10-16 01:34:03,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-10-16 01:34:03,153 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 01:34:03,153 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 01:34:03,179 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 01:34:03,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-10-16 01:34:03,367 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-16 01:34:03,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 01:34:03,368 INFO L85 PathProgramCache]: Analyzing trace with hash 309939088, now seen corresponding path program 1 times [2022-10-16 01:34:03,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 01:34:03,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755506711] [2022-10-16 01:34:03,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 01:34:03,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 01:34:03,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:03,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-16 01:34:03,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:03,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 01:34:03,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:03,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 01:34:03,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 01:34:03,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755506711] [2022-10-16 01:34:03,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755506711] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 01:34:03,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807512734] [2022-10-16 01:34:03,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 01:34:03,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 01:34:03,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 01:34:03,618 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 01:34:03,624 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 01:34:03,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:03,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 28 conjunts are in the unsatisfiable core [2022-10-16 01:34:03,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 01:34:04,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 01:34:04,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 01:34:04,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 01:34:04,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807512734] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 01:34:04,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 01:34:04,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2022-10-16 01:34:04,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021148580] [2022-10-16 01:34:04,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 01:34:04,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-10-16 01:34:04,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 01:34:04,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-10-16 01:34:04,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-10-16 01:34:04,306 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 24 states, 23 states have (on average 3.130434782608696) internal successors, (72), 21 states have internal predecessors, (72), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-16 01:34:04,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 01:34:04,776 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2022-10-16 01:34:04,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-16 01:34:04,776 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.130434782608696) internal successors, (72), 21 states have internal predecessors, (72), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 29 [2022-10-16 01:34:04,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 01:34:04,777 INFO L225 Difference]: With dead ends: 59 [2022-10-16 01:34:04,777 INFO L226 Difference]: Without dead ends: 59 [2022-10-16 01:34:04,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2022-10-16 01:34:04,779 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 116 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 01:34:04,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 339 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 01:34:04,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-10-16 01:34:04,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 40. [2022-10-16 01:34:04,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 32 states have (on average 1.125) internal successors, (36), 35 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-16 01:34:04,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-10-16 01:34:04,782 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 29 [2022-10-16 01:34:04,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 01:34:04,783 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-10-16 01:34:04,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.130434782608696) internal successors, (72), 21 states have internal predecessors, (72), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-16 01:34:04,783 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-10-16 01:34:04,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-10-16 01:34:04,784 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 01:34:04,784 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 01:34:04,819 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 01:34:04,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-10-16 01:34:04,985 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-16 01:34:04,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 01:34:04,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1044443149, now seen corresponding path program 1 times [2022-10-16 01:34:04,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 01:34:04,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28703698] [2022-10-16 01:34:04,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 01:34:04,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 01:34:05,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:05,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-16 01:34:05,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:05,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 01:34:05,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:05,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-16 01:34:05,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 01:34:05,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28703698] [2022-10-16 01:34:05,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28703698] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 01:34:05,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 01:34:05,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-10-16 01:34:05,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728136716] [2022-10-16 01:34:05,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 01:34:05,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-16 01:34:05,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 01:34:05,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-16 01:34:05,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-10-16 01:34:05,148 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 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 01:34:05,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 01:34:05,310 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2022-10-16 01:34:05,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-10-16 01:34:05,310 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 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) Word has length 32 [2022-10-16 01:34:05,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 01:34:05,311 INFO L225 Difference]: With dead ends: 55 [2022-10-16 01:34:05,311 INFO L226 Difference]: Without dead ends: 55 [2022-10-16 01:34:05,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-10-16 01:34:05,313 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 95 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 01:34:05,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 185 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 01:34:05,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-10-16 01:34:05,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 39. [2022-10-16 01:34:05,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 32 states have (on average 1.09375) internal successors, (35), 34 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-16 01:34:05,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-10-16 01:34:05,316 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 32 [2022-10-16 01:34:05,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 01:34:05,317 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-10-16 01:34:05,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 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 01:34:05,317 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-10-16 01:34:05,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-10-16 01:34:05,318 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 01:34:05,318 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 01:34:05,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-10-16 01:34:05,319 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-16 01:34:05,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 01:34:05,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1044443150, now seen corresponding path program 1 times [2022-10-16 01:34:05,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 01:34:05,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241970466] [2022-10-16 01:34:05,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 01:34:05,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 01:34:05,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:05,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-16 01:34:05,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:05,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 01:34:05,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:05,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-16 01:34:05,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 01:34:05,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241970466] [2022-10-16 01:34:05,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241970466] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 01:34:05,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 01:34:05,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-10-16 01:34:05,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268515631] [2022-10-16 01:34:05,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 01:34:05,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-16 01:34:05,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 01:34:05,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-16 01:34:05,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-10-16 01:34:05,822 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 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 01:34:06,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 01:34:06,129 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2022-10-16 01:34:06,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-16 01:34:06,129 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 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) Word has length 32 [2022-10-16 01:34:06,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 01:34:06,130 INFO L225 Difference]: With dead ends: 57 [2022-10-16 01:34:06,130 INFO L226 Difference]: Without dead ends: 57 [2022-10-16 01:34:06,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-10-16 01:34:06,135 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 72 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 01:34:06,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 224 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 01:34:06,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-10-16 01:34:06,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 47. [2022-10-16 01:34:06,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 40 states have (on average 1.075) internal successors, (43), 41 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-16 01:34:06,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2022-10-16 01:34:06,142 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 32 [2022-10-16 01:34:06,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 01:34:06,142 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2022-10-16 01:34:06,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 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 01:34:06,142 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2022-10-16 01:34:06,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-10-16 01:34:06,145 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 01:34:06,145 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 01:34:06,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-10-16 01:34:06,145 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-16 01:34:06,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 01:34:06,146 INFO L85 PathProgramCache]: Analyzing trace with hash -784322550, now seen corresponding path program 1 times [2022-10-16 01:34:06,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 01:34:06,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969570797] [2022-10-16 01:34:06,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 01:34:06,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 01:34:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:06,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-16 01:34:06,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:06,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 01:34:06,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:06,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-16 01:34:06,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 01:34:06,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969570797] [2022-10-16 01:34:06,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969570797] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 01:34:06,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 01:34:06,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-10-16 01:34:06,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39384407] [2022-10-16 01:34:06,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 01:34:06,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-16 01:34:06,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 01:34:06,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-16 01:34:06,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-10-16 01:34:06,741 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 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 01:34:07,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 01:34:07,091 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2022-10-16 01:34:07,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-16 01:34:07,092 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 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) Word has length 32 [2022-10-16 01:34:07,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 01:34:07,092 INFO L225 Difference]: With dead ends: 59 [2022-10-16 01:34:07,093 INFO L226 Difference]: Without dead ends: 59 [2022-10-16 01:34:07,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-10-16 01:34:07,094 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 58 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 01:34:07,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 353 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 01:34:07,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-10-16 01:34:07,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 41. [2022-10-16 01:34:07,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 34 states have (on average 1.088235294117647) internal successors, (37), 36 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-16 01:34:07,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2022-10-16 01:34:07,098 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 32 [2022-10-16 01:34:07,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 01:34:07,099 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2022-10-16 01:34:07,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 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 01:34:07,099 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2022-10-16 01:34:07,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-10-16 01:34:07,100 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 01:34:07,100 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 01:34:07,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-10-16 01:34:07,100 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-16 01:34:07,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 01:34:07,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1310967531, now seen corresponding path program 1 times [2022-10-16 01:34:07,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 01:34:07,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331533592] [2022-10-16 01:34:07,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 01:34:07,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 01:34:07,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:07,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-16 01:34:07,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:07,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 01:34:07,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:07,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-16 01:34:07,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 01:34:07,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331533592] [2022-10-16 01:34:07,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331533592] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 01:34:07,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784817460] [2022-10-16 01:34:07,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 01:34:07,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 01:34:07,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 01:34:07,711 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 01:34:07,736 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 01:34:07,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:07,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 41 conjunts are in the unsatisfiable core [2022-10-16 01:34:07,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 01:34:08,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-10-16 01:34:08,402 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 01:34:08,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 29 treesize of output 12 [2022-10-16 01:34:08,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 01:34:08,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 01:34:08,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 32 treesize of output 23 [2022-10-16 01:34:08,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-16 01:34:08,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784817460] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 01:34:08,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 01:34:08,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 43 [2022-10-16 01:34:08,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969827070] [2022-10-16 01:34:08,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 01:34:08,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-10-16 01:34:08,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 01:34:08,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-10-16 01:34:08,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1654, Unknown=0, NotChecked=0, Total=1806 [2022-10-16 01:34:08,889 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 43 states, 40 states have (on average 1.975) internal successors, (79), 37 states have internal predecessors, (79), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-16 01:34:10,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 01:34:10,202 INFO L93 Difference]: Finished difference Result 67 states and 70 transitions. [2022-10-16 01:34:10,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-10-16 01:34:10,202 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 1.975) internal successors, (79), 37 states have internal predecessors, (79), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 34 [2022-10-16 01:34:10,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 01:34:10,203 INFO L225 Difference]: With dead ends: 67 [2022-10-16 01:34:10,204 INFO L226 Difference]: Without dead ends: 67 [2022-10-16 01:34:10,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=534, Invalid=3626, Unknown=0, NotChecked=0, Total=4160 [2022-10-16 01:34:10,209 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 198 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-16 01:34:10,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 365 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-16 01:34:10,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-10-16 01:34:10,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 53. [2022-10-16 01:34:10,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 46 states have (on average 1.065217391304348) internal successors, (49), 47 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-16 01:34:10,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2022-10-16 01:34:10,214 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 34 [2022-10-16 01:34:10,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 01:34:10,214 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2022-10-16 01:34:10,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 1.975) internal successors, (79), 37 states have internal predecessors, (79), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-16 01:34:10,215 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2022-10-16 01:34:10,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-10-16 01:34:10,216 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 01:34:10,216 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 01:34:10,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-10-16 01:34:10,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 01:34:10,430 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-16 01:34:10,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 01:34:10,432 INFO L85 PathProgramCache]: Analyzing trace with hash 753942104, now seen corresponding path program 1 times [2022-10-16 01:34:10,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 01:34:10,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116740493] [2022-10-16 01:34:10,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 01:34:10,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 01:34:10,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:11,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-16 01:34:11,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:11,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 01:34:11,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:11,109 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-16 01:34:11,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 01:34:11,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116740493] [2022-10-16 01:34:11,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116740493] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 01:34:11,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691223907] [2022-10-16 01:34:11,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 01:34:11,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 01:34:11,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 01:34:11,111 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 01:34:11,128 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 01:34:11,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:11,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 42 conjunts are in the unsatisfiable core [2022-10-16 01:34:11,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 01:34:11,570 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-10-16 01:34:11,896 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 01:34:11,896 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 29 treesize of output 12 [2022-10-16 01:34:11,900 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 01:34:11,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 01:34:12,155 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 32 treesize of output 23 [2022-10-16 01:34:12,409 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-16 01:34:12,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691223907] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 01:34:12,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 01:34:12,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 46 [2022-10-16 01:34:12,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525833046] [2022-10-16 01:34:12,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 01:34:12,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-10-16 01:34:12,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 01:34:12,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-10-16 01:34:12,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1891, Unknown=0, NotChecked=0, Total=2070 [2022-10-16 01:34:12,412 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 46 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 40 states have internal predecessors, (85), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-16 01:34:14,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 01:34:14,253 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2022-10-16 01:34:14,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-10-16 01:34:14,255 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 40 states have internal predecessors, (85), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 36 [2022-10-16 01:34:14,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 01:34:14,255 INFO L225 Difference]: With dead ends: 75 [2022-10-16 01:34:14,255 INFO L226 Difference]: Without dead ends: 75 [2022-10-16 01:34:14,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=739, Invalid=4663, Unknown=0, NotChecked=0, Total=5402 [2022-10-16 01:34:14,259 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 190 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-16 01:34:14,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 575 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-16 01:34:14,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-10-16 01:34:14,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 57. [2022-10-16 01:34:14,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 50 states have (on average 1.06) internal successors, (53), 51 states have internal predecessors, (53), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-16 01:34:14,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2022-10-16 01:34:14,272 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 36 [2022-10-16 01:34:14,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 01:34:14,273 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2022-10-16 01:34:14,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 40 states have internal predecessors, (85), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-16 01:34:14,273 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2022-10-16 01:34:14,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-10-16 01:34:14,274 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 01:34:14,275 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 01:34:14,317 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 01:34:14,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 01:34:14,476 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-16 01:34:14,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 01:34:14,477 INFO L85 PathProgramCache]: Analyzing trace with hash 193393066, now seen corresponding path program 2 times [2022-10-16 01:34:14,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 01:34:14,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219361203] [2022-10-16 01:34:14,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 01:34:14,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 01:34:14,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:15,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-16 01:34:15,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:15,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 01:34:15,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:15,138 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-16 01:34:15,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 01:34:15,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219361203] [2022-10-16 01:34:15,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219361203] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 01:34:15,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306788922] [2022-10-16 01:34:15,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 01:34:15,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 01:34:15,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 01:34:15,142 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 01:34:15,158 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 01:34:15,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 01:34:15,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 01:34:15,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 18 conjunts are in the unsatisfiable core [2022-10-16 01:34:15,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 01:34:15,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-10-16 01:34:15,392 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 9 [2022-10-16 01:34:15,395 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-16 01:34:15,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 01:34:15,645 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 32 treesize of output 23 [2022-10-16 01:34:15,656 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-16 01:34:15,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306788922] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 01:34:15,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 01:34:15,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11, 12] total 32 [2022-10-16 01:34:15,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777697166] [2022-10-16 01:34:15,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 01:34:15,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-10-16 01:34:15,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 01:34:15,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-10-16 01:34:15,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2022-10-16 01:34:15,660 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 32 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-16 01:34:17,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 01:34:17,482 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2022-10-16 01:34:17,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-10-16 01:34:17,484 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 40 [2022-10-16 01:34:17,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 01:34:17,486 INFO L225 Difference]: With dead ends: 95 [2022-10-16 01:34:17,486 INFO L226 Difference]: Without dead ends: 95 [2022-10-16 01:34:17,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1245, Invalid=5397, Unknown=0, NotChecked=0, Total=6642 [2022-10-16 01:34:17,490 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 230 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-16 01:34:17,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 275 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-16 01:34:17,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-10-16 01:34:17,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 59. [2022-10-16 01:34:17,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 54 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-16 01:34:17,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2022-10-16 01:34:17,495 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 40 [2022-10-16 01:34:17,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 01:34:17,496 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2022-10-16 01:34:17,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-16 01:34:17,496 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2022-10-16 01:34:17,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-10-16 01:34:17,497 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 01:34:17,497 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 01:34:17,526 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 01:34:17,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 01:34:17,708 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-16 01:34:17,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 01:34:17,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1809950612, now seen corresponding path program 3 times [2022-10-16 01:34:17,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 01:34:17,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483853212] [2022-10-16 01:34:17,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 01:34:17,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 01:34:17,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:18,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-16 01:34:18,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:18,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 01:34:18,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 3 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 01:34:18,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 01:34:18,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483853212] [2022-10-16 01:34:18,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483853212] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 01:34:18,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500533008] [2022-10-16 01:34:18,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 01:34:18,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 01:34:18,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 01:34:18,669 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 01:34:18,698 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 01:34:18,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-10-16 01:34:18,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 01:34:18,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 53 conjunts are in the unsatisfiable core [2022-10-16 01:34:18,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 01:34:19,087 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-10-16 01:34:19,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 12 [2022-10-16 01:34:20,028 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-10-16 01:34:20,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 01:34:20,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 43 treesize of output 34 [2022-10-16 01:34:20,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 01:34:20,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 01:34:20,869 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-10-16 01:34:20,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500533008] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 01:34:20,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 01:34:20,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13, 14] total 46 [2022-10-16 01:34:20,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272477273] [2022-10-16 01:34:20,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 01:34:20,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-10-16 01:34:20,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 01:34:20,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-10-16 01:34:20,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1954, Unknown=0, NotChecked=0, Total=2162 [2022-10-16 01:34:20,873 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 47 states, 46 states have (on average 2.369565217391304) internal successors, (109), 44 states have internal predecessors, (109), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2022-10-16 01:34:24,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 01:34:24,649 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2022-10-16 01:34:24,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-10-16 01:34:24,651 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 2.369565217391304) internal successors, (109), 44 states have internal predecessors, (109), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) Word has length 52 [2022-10-16 01:34:24,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 01:34:24,652 INFO L225 Difference]: With dead ends: 94 [2022-10-16 01:34:24,652 INFO L226 Difference]: Without dead ends: 94 [2022-10-16 01:34:24,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=749, Invalid=5571, Unknown=0, NotChecked=0, Total=6320 [2022-10-16 01:34:24,655 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 243 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-16 01:34:24,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 241 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-16 01:34:24,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-10-16 01:34:24,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 89. [2022-10-16 01:34:24,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 82 states have (on average 1.048780487804878) internal successors, (86), 83 states have internal predecessors, (86), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-16 01:34:24,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2022-10-16 01:34:24,660 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 52 [2022-10-16 01:34:24,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 01:34:24,660 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2022-10-16 01:34:24,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 2.369565217391304) internal successors, (109), 44 states have internal predecessors, (109), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2022-10-16 01:34:24,660 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2022-10-16 01:34:24,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-10-16 01:34:24,661 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 01:34:24,661 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 01:34:24,686 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 01:34:24,868 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,SelfDestructingSolverStorable21 [2022-10-16 01:34:24,869 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-16 01:34:24,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 01:34:24,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1805839984, now seen corresponding path program 2 times [2022-10-16 01:34:24,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 01:34:24,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139348336] [2022-10-16 01:34:24,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 01:34:24,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 01:34:24,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:25,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-16 01:34:25,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:25,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 01:34:25,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:25,726 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 3 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 01:34:25,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 01:34:25,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139348336] [2022-10-16 01:34:25,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139348336] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 01:34:25,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429528765] [2022-10-16 01:34:25,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 01:34:25,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 01:34:25,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 01:34:25,728 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 01:34:25,737 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 01:34:25,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 01:34:25,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 01:34:25,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 62 conjunts are in the unsatisfiable core [2022-10-16 01:34:25,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 01:34:26,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-10-16 01:34:27,921 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 12 [2022-10-16 01:34:28,107 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 3 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 01:34:28,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 01:34:29,655 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 13 [2022-10-16 01:34:29,658 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 65 treesize of output 47 [2022-10-16 01:34:30,078 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 3 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 01:34:30,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429528765] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 01:34:30,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 01:34:30,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23, 24] total 66 [2022-10-16 01:34:30,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653376425] [2022-10-16 01:34:30,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 01:34:30,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-10-16 01:34:30,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 01:34:30,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-10-16 01:34:30,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=495, Invalid=3927, Unknown=0, NotChecked=0, Total=4422 [2022-10-16 01:34:30,082 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand has 67 states, 66 states have (on average 2.1363636363636362) internal successors, (141), 64 states have internal predecessors, (141), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2022-10-16 01:34:37,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 01:34:37,161 INFO L93 Difference]: Finished difference Result 157 states and 160 transitions. [2022-10-16 01:34:37,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-10-16 01:34:37,162 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 2.1363636363636362) internal successors, (141), 64 states have internal predecessors, (141), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) Word has length 52 [2022-10-16 01:34:37,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 01:34:37,163 INFO L225 Difference]: With dead ends: 157 [2022-10-16 01:34:37,163 INFO L226 Difference]: Without dead ends: 157 [2022-10-16 01:34:37,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4067 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=2081, Invalid=12925, Unknown=0, NotChecked=0, Total=15006 [2022-10-16 01:34:37,169 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 396 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 1348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-10-16 01:34:37,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 401 Invalid, 1348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-10-16 01:34:37,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-10-16 01:34:37,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 103. [2022-10-16 01:34:37,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 96 states have (on average 1.1145833333333333) internal successors, (107), 97 states have internal predecessors, (107), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-16 01:34:37,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 114 transitions. [2022-10-16 01:34:37,174 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 114 transitions. Word has length 52 [2022-10-16 01:34:37,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 01:34:37,175 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 114 transitions. [2022-10-16 01:34:37,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 2.1363636363636362) internal successors, (141), 64 states have internal predecessors, (141), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2022-10-16 01:34:37,175 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 114 transitions. [2022-10-16 01:34:37,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-10-16 01:34:37,176 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 01:34:37,176 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 01:34:37,208 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 01:34:37,391 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,SelfDestructingSolverStorable22 [2022-10-16 01:34:37,391 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-16 01:34:37,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 01:34:37,393 INFO L85 PathProgramCache]: Analyzing trace with hash -857919876, now seen corresponding path program 1 times [2022-10-16 01:34:37,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 01:34:37,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301444514] [2022-10-16 01:34:37,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 01:34:37,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 01:34:37,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:38,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-16 01:34:38,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:38,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 01:34:38,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:38,581 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 3 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 01:34:38,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 01:34:38,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301444514] [2022-10-16 01:34:38,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301444514] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 01:34:38,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682817407] [2022-10-16 01:34:38,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 01:34:38,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 01:34:38,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 01:34:38,585 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 01:34:38,608 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 01:34:38,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:38,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 65 conjunts are in the unsatisfiable core [2022-10-16 01:34:38,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 01:34:38,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-10-16 01:34:40,042 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 25 treesize of output 7 [2022-10-16 01:34:40,050 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-16 01:34:40,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 01:34:40,998 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-16 01:34:40,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682817407] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 01:34:40,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 01:34:40,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25, 19] total 57 [2022-10-16 01:34:41,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228615770] [2022-10-16 01:34:41,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 01:34:41,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-10-16 01:34:41,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 01:34:41,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-10-16 01:34:41,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=3033, Unknown=0, NotChecked=0, Total=3192 [2022-10-16 01:34:41,002 INFO L87 Difference]: Start difference. First operand 103 states and 114 transitions. Second operand has 57 states, 56 states have (on average 2.4642857142857144) internal successors, (138), 54 states have internal predecessors, (138), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-10-16 01:34:43,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 01:34:43,607 INFO L93 Difference]: Finished difference Result 122 states and 131 transitions. [2022-10-16 01:34:43,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-10-16 01:34:43,607 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 2.4642857142857144) internal successors, (138), 54 states have internal predecessors, (138), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 56 [2022-10-16 01:34:43,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 01:34:43,609 INFO L225 Difference]: With dead ends: 122 [2022-10-16 01:34:43,609 INFO L226 Difference]: Without dead ends: 112 [2022-10-16 01:34:43,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1567 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=448, Invalid=7562, Unknown=0, NotChecked=0, Total=8010 [2022-10-16 01:34:43,611 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 82 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 274 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-16 01:34:43,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 609 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1041 Invalid, 0 Unknown, 274 Unchecked, 0.6s Time] [2022-10-16 01:34:43,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-10-16 01:34:43,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 105. [2022-10-16 01:34:43,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 98 states have (on average 1.1020408163265305) internal successors, (108), 99 states have internal predecessors, (108), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-16 01:34:43,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 115 transitions. [2022-10-16 01:34:43,616 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 115 transitions. Word has length 56 [2022-10-16 01:34:43,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 01:34:43,617 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 115 transitions. [2022-10-16 01:34:43,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 2.4642857142857144) internal successors, (138), 54 states have internal predecessors, (138), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-10-16 01:34:43,617 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 115 transitions. [2022-10-16 01:34:43,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-10-16 01:34:43,618 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 01:34:43,618 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 01:34:43,649 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 01:34:43,833 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,SelfDestructingSolverStorable23 [2022-10-16 01:34:43,834 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-16 01:34:43,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 01:34:43,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1119851139, now seen corresponding path program 2 times [2022-10-16 01:34:43,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 01:34:43,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153469387] [2022-10-16 01:34:43,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 01:34:43,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 01:34:43,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:44,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-16 01:34:44,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:44,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 01:34:44,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 01:34:44,845 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 103 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-16 01:34:44,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 01:34:44,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153469387] [2022-10-16 01:34:44,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153469387] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 01:34:44,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353023455] [2022-10-16 01:34:44,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 01:34:44,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 01:34:44,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 01:34:44,848 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 01:34:44,848 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 01:34:44,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 01:34:44,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 01:34:44,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 24 conjunts are in the unsatisfiable core [2022-10-16 01:34:44,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 01:34:44,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-10-16 01:34:45,100 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-10-16 01:34:45,102 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 122 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-16 01:34:45,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 01:34:45,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 32 treesize of output 23 [2022-10-16 01:34:45,478 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 122 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-16 01:34:45,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353023455] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 01:34:45,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 01:34:45,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 17, 18] total 31 [2022-10-16 01:34:45,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346796729] [2022-10-16 01:34:45,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 01:34:45,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-10-16 01:34:45,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 01:34:45,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-10-16 01:34:45,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2022-10-16 01:34:45,481 INFO L87 Difference]: Start difference. First operand 105 states and 115 transitions. Second operand has 31 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-16 01:34:47,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 01:34:47,978 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2022-10-16 01:34:47,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-10-16 01:34:47,979 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 58 [2022-10-16 01:34:47,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 01:34:47,979 INFO L225 Difference]: With dead ends: 79 [2022-10-16 01:34:47,979 INFO L226 Difference]: Without dead ends: 0 [2022-10-16 01:34:47,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 100 SyntacticMatches, 15 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2013 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1509, Invalid=5631, Unknown=0, NotChecked=0, Total=7140 [2022-10-16 01:34:47,981 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 52 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-16 01:34:47,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 180 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-16 01:34:47,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-10-16 01:34:47,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-10-16 01:34:47,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 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 01:34:47,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-10-16 01:34:47,983 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 58 [2022-10-16 01:34:47,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 01:34:47,983 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-10-16 01:34:47,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-16 01:34:47,983 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-10-16 01:34:47,983 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-10-16 01:34:47,987 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 18 remaining) [2022-10-16 01:34:47,988 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 18 remaining) [2022-10-16 01:34:47,988 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 18 remaining) [2022-10-16 01:34:47,988 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 18 remaining) [2022-10-16 01:34:47,988 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 18 remaining) [2022-10-16 01:34:47,988 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 18 remaining) [2022-10-16 01:34:47,989 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 18 remaining) [2022-10-16 01:34:47,989 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 18 remaining) [2022-10-16 01:34:47,989 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 18 remaining) [2022-10-16 01:34:47,989 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 18 remaining) [2022-10-16 01:34:47,989 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 18 remaining) [2022-10-16 01:34:47,989 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 18 remaining) [2022-10-16 01:34:47,990 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 18 remaining) [2022-10-16 01:34:47,990 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 18 remaining) [2022-10-16 01:34:47,990 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 18 remaining) [2022-10-16 01:34:47,990 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 18 remaining) [2022-10-16 01:34:47,990 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK (1 of 18 remaining) [2022-10-16 01:34:47,991 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK (0 of 18 remaining) [2022-10-16 01:34:48,019 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 01:34:48,194 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,SelfDestructingSolverStorable24 [2022-10-16 01:34:48,199 INFO L444 BasicCegarLoop]: Path program histogram: [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 01:34:48,203 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-10-16 01:34:48,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 01:34:48 BoogieIcfgContainer [2022-10-16 01:34:48,209 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-10-16 01:34:48,210 INFO L158 Benchmark]: Toolchain (without parser) took 55487.45ms. Allocated memory was 154.1MB in the beginning and 323.0MB in the end (delta: 168.8MB). Free memory was 127.9MB in the beginning and 215.5MB in the end (delta: -87.6MB). Peak memory consumption was 82.4MB. Max. memory is 8.0GB. [2022-10-16 01:34:48,210 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 154.1MB. Free memory was 124.1MB in the beginning and 124.0MB in the end (delta: 140.0kB). There was no memory consumed. Max. memory is 8.0GB. [2022-10-16 01:34:48,211 INFO L158 Benchmark]: CACSL2BoogieTranslator took 275.62ms. Allocated memory is still 154.1MB. Free memory was 127.6MB in the beginning and 117.0MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-10-16 01:34:48,211 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.13ms. Allocated memory is still 154.1MB. Free memory was 117.0MB in the beginning and 115.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-10-16 01:34:48,212 INFO L158 Benchmark]: Boogie Preprocessor took 32.32ms. Allocated memory is still 154.1MB. Free memory was 115.3MB in the beginning and 114.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-10-16 01:34:48,213 INFO L158 Benchmark]: RCFGBuilder took 634.95ms. Allocated memory is still 154.1MB. Free memory was 113.9MB in the beginning and 99.7MB in the end (delta: 14.2MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2022-10-16 01:34:48,213 INFO L158 Benchmark]: TraceAbstraction took 54488.00ms. Allocated memory was 154.1MB in the beginning and 323.0MB in the end (delta: 168.8MB). Free memory was 99.0MB in the beginning and 215.5MB in the end (delta: -116.4MB). Peak memory consumption was 53.1MB. Max. memory is 8.0GB. [2022-10-16 01:34:48,219 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 154.1MB. Free memory was 124.1MB in the beginning and 124.0MB in the end (delta: 140.0kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 275.62ms. Allocated memory is still 154.1MB. Free memory was 127.6MB in the beginning and 117.0MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 45.13ms. Allocated memory is still 154.1MB. Free memory was 117.0MB in the beginning and 115.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 32.32ms. Allocated memory is still 154.1MB. Free memory was 115.3MB in the beginning and 114.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 634.95ms. Allocated memory is still 154.1MB. Free memory was 113.9MB in the beginning and 99.7MB in the end (delta: 14.2MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 54488.00ms. Allocated memory was 154.1MB in the beginning and 323.0MB in the end (delta: 168.8MB). Free memory was 99.0MB in the beginning and 215.5MB in the end (delta: -116.4MB). Peak memory consumption was 53.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 52]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 33]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 54 locations, 18 error locations. Started 1 CEGAR loops. OverallTime: 54.4s, OverallIterations: 25, TraceHistogramMax: 12, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 25.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2850 SdHoareTripleChecker+Valid, 5.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2827 mSDsluCounter, 6457 SdHoareTripleChecker+Invalid, 4.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 274 IncrementalHoareTripleChecker+Unchecked, 5693 mSDsCounter, 633 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8199 IncrementalHoareTripleChecker+Invalid, 9106 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 633 mSolverCounterUnsat, 764 mSDtfsCounter, 8199 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1663 GetRequests, 772 SyntacticMatches, 28 SemanticMatches, 863 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13913 ImplicationChecksByTransitivity, 30.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=105occurred in iteration=24, InterpolantAutomatonStates: 465, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 25 MinimizatonAttempts, 315 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 24.4s InterpolantComputationTime, 1238 NumberOfCodeBlocks, 1222 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 1685 ConstructedInterpolants, 21 QuantifiedInterpolants, 18521 SizeOfPredicates, 121 NumberOfNonLiveVariables, 2604 ConjunctsInSsa, 413 ConjunctsInUnsatCore, 51 InterpolantComputations, 12 PerfectInterpolantSequences, 656/1658 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 18 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-10-16 01:34:48,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...