/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/standard_partition_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 18:13:05,735 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 18:13:05,741 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 18:13:05,792 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-10-15 18:13:05,852 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 18:13:05,853 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 18:13:05,853 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 18:13:05,854 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-15 18:13:05,883 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 18:13:05,884 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 18:13:05,884 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 18:13:05,884 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 18:13:05,885 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 18:13:05,885 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 18:13:05,886 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 18:13:05,887 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 18:13:05,887 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 18:13:05,887 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 18:13:05,887 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 18:13:05,887 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 18:13:05,888 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 18:13:05,888 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 18:13:05,888 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 18:13:05,888 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 18:13:05,888 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 18:13:05,889 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 18:13:05,889 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 18:13:05,889 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 18:13:05,889 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 18:13:05,889 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 18:13:05,890 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 18:13:05,890 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 18:13:05,890 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 18:13:05,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 18:13:05,891 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 18:13:05,891 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 18:13:05,891 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 18:13:05,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 18:13:05,891 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 18:13:06,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 18:13:06,281 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 18:13:06,284 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 18:13:06,286 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 18:13:06,287 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 18:13:06,289 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_partition_ground-1.i [2022-10-15 18:13:06,370 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fa6e9dec/520eb4ba251f408496e92576899ad41c/FLAG9fb6896ff [2022-10-15 18:13:07,008 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 18:13:07,009 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partition_ground-1.i [2022-10-15 18:13:07,018 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fa6e9dec/520eb4ba251f408496e92576899ad41c/FLAG9fb6896ff [2022-10-15 18:13:07,351 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fa6e9dec/520eb4ba251f408496e92576899ad41c [2022-10-15 18:13:07,359 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 18:13:07,365 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 18:13:07,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 18:13:07,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 18:13:07,373 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 18:13:07,374 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 06:13:07" (1/1) ... [2022-10-15 18:13:07,375 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fc51e27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:13:07, skipping insertion in model container [2022-10-15 18:13:07,375 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 06:13:07" (1/1) ... [2022-10-15 18:13:07,384 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 18:13:07,403 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 18:13:07,557 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partition_ground-1.i[860,873] [2022-10-15 18:13:07,590 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 18:13:07,604 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 18:13:07,622 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partition_ground-1.i[860,873] [2022-10-15 18:13:07,648 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 18:13:07,666 INFO L208 MainTranslator]: Completed translation [2022-10-15 18:13:07,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:13:07 WrapperNode [2022-10-15 18:13:07,667 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 18:13:07,668 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 18:13:07,668 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 18:13:07,668 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 18:13:07,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:13:07" (1/1) ... [2022-10-15 18:13:07,684 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:13:07" (1/1) ... [2022-10-15 18:13:07,708 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 82 [2022-10-15 18:13:07,708 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 18:13:07,709 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 18:13:07,709 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 18:13:07,709 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 18:13:07,718 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:13:07" (1/1) ... [2022-10-15 18:13:07,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:13:07" (1/1) ... [2022-10-15 18:13:07,721 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:13:07" (1/1) ... [2022-10-15 18:13:07,722 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:13:07" (1/1) ... [2022-10-15 18:13:07,729 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:13:07" (1/1) ... [2022-10-15 18:13:07,733 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:13:07" (1/1) ... [2022-10-15 18:13:07,735 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:13:07" (1/1) ... [2022-10-15 18:13:07,736 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:13:07" (1/1) ... [2022-10-15 18:13:07,738 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 18:13:07,739 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 18:13:07,740 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 18:13:07,740 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 18:13:07,741 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:13:07" (1/1) ... [2022-10-15 18:13:07,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 18:13:07,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:13:07,769 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-15 18:13:07,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-15 18:13:07,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 18:13:07,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 18:13:07,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 18:13:07,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 18:13:07,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 18:13:07,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 18:13:07,830 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 18:13:07,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-10-15 18:13:07,830 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-10-15 18:13:07,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 18:13:07,908 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 18:13:07,910 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 18:13:08,245 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 18:13:08,266 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 18:13:08,267 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-10-15 18:13:08,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 06:13:08 BoogieIcfgContainer [2022-10-15 18:13:08,271 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 18:13:08,277 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 18:13:08,277 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 18:13:08,284 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 18:13:08,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 06:13:07" (1/3) ... [2022-10-15 18:13:08,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78dfbf38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 06:13:08, skipping insertion in model container [2022-10-15 18:13:08,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:13:07" (2/3) ... [2022-10-15 18:13:08,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78dfbf38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 06:13:08, skipping insertion in model container [2022-10-15 18:13:08,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 06:13:08" (3/3) ... [2022-10-15 18:13:08,292 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-1.i [2022-10-15 18:13:08,317 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 18:13:08,317 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-10-15 18:13:08,439 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 18:13:08,452 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;@4767c2d1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 18:13:08,452 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-10-15 18:13:08,459 INFO L276 IsEmpty]: Start isEmpty. Operand has 60 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 56 states have internal predecessors, (67), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-15 18:13:08,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 18:13:08,481 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:13:08,482 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 18:13:08,483 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-15 18:13:08,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:13:08,490 INFO L85 PathProgramCache]: Analyzing trace with hash 925797, now seen corresponding path program 1 times [2022-10-15 18:13:08,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:13:08,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322361235] [2022-10-15 18:13:08,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:13:08,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:13:08,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:13:09,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:13:09,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:13:09,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322361235] [2022-10-15 18:13:09,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322361235] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:13:09,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:13:09,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:13:09,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592003117] [2022-10-15 18:13:09,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:13:09,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:13:09,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:13:09,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:13:09,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:13:09,070 INFO L87 Difference]: Start difference. First operand has 60 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 56 states have internal predecessors, (67), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:13:09,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:13:09,187 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2022-10-15 18:13:09,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:13:09,190 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-15 18:13:09,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:13:09,202 INFO L225 Difference]: With dead ends: 55 [2022-10-15 18:13:09,202 INFO L226 Difference]: Without dead ends: 53 [2022-10-15 18:13:09,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:13:09,209 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 45 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:13:09,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 48 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:13:09,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-10-15 18:13:09,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-10-15 18:13:09,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 49 states have internal predecessors, (55), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-15 18:13:09,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2022-10-15 18:13:09,267 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 4 [2022-10-15 18:13:09,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:13:09,268 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2022-10-15 18:13:09,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:13:09,268 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2022-10-15 18:13:09,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 18:13:09,269 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:13:09,269 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 18:13:09,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 18:13:09,270 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-15 18:13:09,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:13:09,270 INFO L85 PathProgramCache]: Analyzing trace with hash 925798, now seen corresponding path program 1 times [2022-10-15 18:13:09,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:13:09,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719430227] [2022-10-15 18:13:09,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:13:09,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:13:09,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:13:09,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:13:09,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:13:09,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719430227] [2022-10-15 18:13:09,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719430227] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:13:09,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:13:09,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:13:09,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845821627] [2022-10-15 18:13:09,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:13:09,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:13:09,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:13:09,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:13:09,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:13:09,520 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:13:09,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:13:09,601 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2022-10-15 18:13:09,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:13:09,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-15 18:13:09,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:13:09,603 INFO L225 Difference]: With dead ends: 64 [2022-10-15 18:13:09,603 INFO L226 Difference]: Without dead ends: 64 [2022-10-15 18:13:09,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:13:09,606 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 10 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:13:09,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 83 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:13:09,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-10-15 18:13:09,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2022-10-15 18:13:09,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 55 states have internal predecessors, (62), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-15 18:13:09,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2022-10-15 18:13:09,617 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 4 [2022-10-15 18:13:09,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:13:09,617 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2022-10-15 18:13:09,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:13:09,618 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2022-10-15 18:13:09,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-15 18:13:09,619 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:13:09,619 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:13:09,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 18:13:09,619 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-15 18:13:09,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:13:09,620 INFO L85 PathProgramCache]: Analyzing trace with hash 524645940, now seen corresponding path program 1 times [2022-10-15 18:13:09,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:13:09,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800009601] [2022-10-15 18:13:09,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:13:09,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:13:09,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:13:09,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:13:09,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:13:09,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800009601] [2022-10-15 18:13:09,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800009601] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:13:09,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:13:09,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:13:09,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576334895] [2022-10-15 18:13:09,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:13:09,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:13:09,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:13:09,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:13:09,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:13:09,715 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:13:09,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:13:09,750 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2022-10-15 18:13:09,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:13:09,751 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-10-15 18:13:09,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:13:09,752 INFO L225 Difference]: With dead ends: 57 [2022-10-15 18:13:09,752 INFO L226 Difference]: Without dead ends: 57 [2022-10-15 18:13:09,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:13:09,755 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 38 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:13:09,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 48 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:13:09,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-10-15 18:13:09,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-10-15 18:13:09,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 53 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-15 18:13:09,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2022-10-15 18:13:09,764 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 9 [2022-10-15 18:13:09,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:13:09,765 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2022-10-15 18:13:09,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:13:09,766 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2022-10-15 18:13:09,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-15 18:13:09,766 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:13:09,766 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:13:09,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-15 18:13:09,767 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-15 18:13:09,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:13:09,768 INFO L85 PathProgramCache]: Analyzing trace with hash 524645941, now seen corresponding path program 1 times [2022-10-15 18:13:09,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:13:09,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714919800] [2022-10-15 18:13:09,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:13:09,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:13:09,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:13:09,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:13:09,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:13:09,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714919800] [2022-10-15 18:13:09,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714919800] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:13:09,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:13:09,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:13:09,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637068938] [2022-10-15 18:13:09,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:13:09,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:13:09,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:13:09,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:13:09,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:13:09,954 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:13:10,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:13:10,096 INFO L93 Difference]: Finished difference Result 97 states and 112 transitions. [2022-10-15 18:13:10,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:13:10,097 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-10-15 18:13:10,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:13:10,098 INFO L225 Difference]: With dead ends: 97 [2022-10-15 18:13:10,099 INFO L226 Difference]: Without dead ends: 97 [2022-10-15 18:13:10,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:13:10,103 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 36 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:13:10,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 69 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:13:10,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-10-15 18:13:10,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 65. [2022-10-15 18:13:10,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 49 states have (on average 1.489795918367347) internal successors, (73), 61 states have internal predecessors, (73), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-15 18:13:10,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2022-10-15 18:13:10,126 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 9 [2022-10-15 18:13:10,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:13:10,129 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2022-10-15 18:13:10,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:13:10,129 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2022-10-15 18:13:10,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-15 18:13:10,130 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:13:10,130 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:13:10,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-15 18:13:10,131 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-15 18:13:10,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:13:10,132 INFO L85 PathProgramCache]: Analyzing trace with hash -915567766, now seen corresponding path program 1 times [2022-10-15 18:13:10,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:13:10,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492826337] [2022-10-15 18:13:10,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:13:10,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:13:10,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:13:10,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:13:10,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:13:10,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492826337] [2022-10-15 18:13:10,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492826337] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:13:10,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394403418] [2022-10-15 18:13:10,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:13:10,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:13:10,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:13:10,388 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:13:10,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-15 18:13:10,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:13:10,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 18 conjunts are in the unsatisfiable core [2022-10-15 18:13:10,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:13:10,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:13:10,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:13:10,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:13:10,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-10-15 18:13:10,593 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-15 18:13:10,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-10-15 18:13:10,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:13:10,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:13:10,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:13:10,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394403418] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:13:10,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:13:10,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-10-15 18:13:10,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023448983] [2022-10-15 18:13:10,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:13:10,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-15 18:13:10,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:13:10,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-15 18:13:10,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-10-15 18:13:10,808 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:13:10,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:13:10,967 INFO L93 Difference]: Finished difference Result 108 states and 126 transitions. [2022-10-15 18:13:10,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 18:13:10,968 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-10-15 18:13:10,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:13:10,970 INFO L225 Difference]: With dead ends: 108 [2022-10-15 18:13:10,970 INFO L226 Difference]: Without dead ends: 108 [2022-10-15 18:13:10,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-10-15 18:13:10,972 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 63 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:13:10,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 154 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:13:10,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-10-15 18:13:10,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2022-10-15 18:13:10,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 91 states have (on average 1.3186813186813187) internal successors, (120), 100 states have internal predecessors, (120), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-15 18:13:10,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 124 transitions. [2022-10-15 18:13:10,986 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 124 transitions. Word has length 10 [2022-10-15 18:13:10,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:13:10,987 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 124 transitions. [2022-10-15 18:13:10,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:13:10,987 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 124 transitions. [2022-10-15 18:13:10,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-15 18:13:10,988 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:13:10,988 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-15 18:13:11,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-15 18:13:11,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:13:11,203 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-15 18:13:11,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:13:11,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1375485569, now seen corresponding path program 1 times [2022-10-15 18:13:11,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:13:11,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083529478] [2022-10-15 18:13:11,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:13:11,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:13:11,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:13:11,485 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:13:11,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:13:11,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083529478] [2022-10-15 18:13:11,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083529478] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:13:11,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056042538] [2022-10-15 18:13:11,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:13:11,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:13:11,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:13:11,491 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:13:11,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-15 18:13:11,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:13:11,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-15 18:13:11,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:13:11,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:13:11,648 INFO L356 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-10-15 18:13:11,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2022-10-15 18:13:11,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2022-10-15 18:13:11,826 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:13:11,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:13:11,943 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:13:11,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056042538] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:13:11,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:13:11,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-10-15 18:13:11,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398697291] [2022-10-15 18:13:11,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:13:11,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-15 18:13:11,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:13:11,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-15 18:13:11,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-10-15 18:13:11,946 INFO L87 Difference]: Start difference. First operand 104 states and 124 transitions. Second operand has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:13:12,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:13:12,162 INFO L93 Difference]: Finished difference Result 260 states and 311 transitions. [2022-10-15 18:13:12,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 18:13:12,162 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-10-15 18:13:12,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:13:12,165 INFO L225 Difference]: With dead ends: 260 [2022-10-15 18:13:12,165 INFO L226 Difference]: Without dead ends: 260 [2022-10-15 18:13:12,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-10-15 18:13:12,167 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 253 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 18:13:12,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 202 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 18:13:12,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-10-15 18:13:12,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 148. [2022-10-15 18:13:12,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 135 states have (on average 1.2962962962962963) internal successors, (175), 144 states have internal predecessors, (175), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-15 18:13:12,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 179 transitions. [2022-10-15 18:13:12,191 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 179 transitions. Word has length 18 [2022-10-15 18:13:12,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:13:12,194 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 179 transitions. [2022-10-15 18:13:12,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:13:12,195 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 179 transitions. [2022-10-15 18:13:12,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-15 18:13:12,196 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:13:12,196 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-15 18:13:12,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-10-15 18:13:12,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-10-15 18:13:12,410 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-15 18:13:12,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:13:12,412 INFO L85 PathProgramCache]: Analyzing trace with hash 168685417, now seen corresponding path program 1 times [2022-10-15 18:13:12,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:13:12,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881969034] [2022-10-15 18:13:12,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:13:12,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:13:12,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:13:12,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 18:13:12,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:13:12,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881969034] [2022-10-15 18:13:12,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881969034] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:13:12,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60296214] [2022-10-15 18:13:12,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:13:12,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:13:12,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:13:12,532 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:13:12,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-15 18:13:12,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:13:12,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-15 18:13:12,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:13:12,629 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:13:12,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:13:12,673 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:13:12,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60296214] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:13:12,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:13:12,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2022-10-15 18:13:12,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513917988] [2022-10-15 18:13:12,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:13:12,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-15 18:13:12,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:13:12,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-15 18:13:12,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2022-10-15 18:13:12,676 INFO L87 Difference]: Start difference. First operand 148 states and 179 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:13:12,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:13:12,888 INFO L93 Difference]: Finished difference Result 278 states and 320 transitions. [2022-10-15 18:13:12,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-15 18:13:12,889 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-10-15 18:13:12,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:13:12,890 INFO L225 Difference]: With dead ends: 278 [2022-10-15 18:13:12,891 INFO L226 Difference]: Without dead ends: 278 [2022-10-15 18:13:12,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-10-15 18:13:12,892 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 318 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:13:12,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 124 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:13:12,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-10-15 18:13:12,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 262. [2022-10-15 18:13:12,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 249 states have (on average 1.2690763052208835) internal successors, (316), 258 states have internal predecessors, (316), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-15 18:13:12,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 320 transitions. [2022-10-15 18:13:12,946 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 320 transitions. Word has length 18 [2022-10-15 18:13:12,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:13:12,947 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 320 transitions. [2022-10-15 18:13:12,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:13:12,947 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 320 transitions. [2022-10-15 18:13:12,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-10-15 18:13:12,949 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:13:12,949 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1] [2022-10-15 18:13:12,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-15 18:13:13,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:13:13,151 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-15 18:13:13,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:13:13,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1269881462, now seen corresponding path program 2 times [2022-10-15 18:13:13,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:13:13,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736813479] [2022-10-15 18:13:13,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:13:13,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:13:13,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:13:13,553 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:13:13,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:13:13,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736813479] [2022-10-15 18:13:13,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736813479] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:13:13,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915397000] [2022-10-15 18:13:13,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:13:13,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:13:13,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:13:13,556 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:13:13,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-15 18:13:13,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 18:13:13,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:13:13,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2022-10-15 18:13:13,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:13:13,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:13:13,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:13:13,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:13:13,655 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-10-15 18:13:13,662 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-15 18:13:13,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-10-15 18:13:13,887 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:13:13,887 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:13:13,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915397000] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:13:13,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:13:13,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2022-10-15 18:13:13,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200535543] [2022-10-15 18:13:13,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:13:13,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-15 18:13:13,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:13:13,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-15 18:13:13,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-10-15 18:13:13,890 INFO L87 Difference]: Start difference. First operand 262 states and 320 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:13:14,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:13:14,047 INFO L93 Difference]: Finished difference Result 269 states and 308 transitions. [2022-10-15 18:13:14,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-15 18:13:14,049 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-10-15 18:13:14,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:13:14,051 INFO L225 Difference]: With dead ends: 269 [2022-10-15 18:13:14,051 INFO L226 Difference]: Without dead ends: 269 [2022-10-15 18:13:14,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-10-15 18:13:14,054 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 105 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:13:14,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 149 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:13:14,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-10-15 18:13:14,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 261. [2022-10-15 18:13:14,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 249 states have (on average 1.2208835341365463) internal successors, (304), 257 states have internal predecessors, (304), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-15 18:13:14,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 308 transitions. [2022-10-15 18:13:14,096 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 308 transitions. Word has length 28 [2022-10-15 18:13:14,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:13:14,096 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 308 transitions. [2022-10-15 18:13:14,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:13:14,100 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 308 transitions. [2022-10-15 18:13:14,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-10-15 18:13:14,103 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:13:14,104 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1] [2022-10-15 18:13:14,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-15 18:13:14,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:13:14,319 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-15 18:13:14,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:13:14,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1514651339, now seen corresponding path program 2 times [2022-10-15 18:13:14,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:13:14,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677640156] [2022-10-15 18:13:14,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:13:14,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:13:14,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:13:14,658 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:13:14,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:13:14,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677640156] [2022-10-15 18:13:14,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677640156] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:13:14,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232791514] [2022-10-15 18:13:14,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:13:14,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:13:14,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:13:14,660 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:13:14,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-15 18:13:14,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 18:13:14,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:13:14,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 26 conjunts are in the unsatisfiable core [2022-10-15 18:13:14,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:13:14,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:13:14,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:13:14,782 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-15 18:13:14,782 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-10-15 18:13:14,789 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-10-15 18:13:15,072 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:13:15,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:13:15,350 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:13:15,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232791514] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:13:15,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:13:15,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-10-15 18:13:15,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502204425] [2022-10-15 18:13:15,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:13:15,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-10-15 18:13:15,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:13:15,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-10-15 18:13:15,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-10-15 18:13:15,353 INFO L87 Difference]: Start difference. First operand 261 states and 308 transitions. Second operand has 16 states, 15 states have (on average 8.333333333333334) internal successors, (125), 16 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:13:16,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:13:16,065 INFO L93 Difference]: Finished difference Result 948 states and 1236 transitions. [2022-10-15 18:13:16,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-15 18:13:16,066 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 8.333333333333334) internal successors, (125), 16 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-10-15 18:13:16,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:13:16,072 INFO L225 Difference]: With dead ends: 948 [2022-10-15 18:13:16,072 INFO L226 Difference]: Without dead ends: 948 [2022-10-15 18:13:16,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2022-10-15 18:13:16,074 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 1111 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1123 SdHoareTripleChecker+Valid, 983 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-15 18:13:16,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1123 Valid, 983 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-15 18:13:16,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2022-10-15 18:13:16,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 318. [2022-10-15 18:13:16,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 306 states have (on average 1.2156862745098038) internal successors, (372), 314 states have internal predecessors, (372), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-15 18:13:16,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 376 transitions. [2022-10-15 18:13:16,091 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 376 transitions. Word has length 45 [2022-10-15 18:13:16,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:13:16,092 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 376 transitions. [2022-10-15 18:13:16,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 8.333333333333334) internal successors, (125), 16 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:13:16,092 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 376 transitions. [2022-10-15 18:13:16,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-10-15 18:13:16,095 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:13:16,095 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:13:16,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-15 18:13:16,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:13:16,309 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-15 18:13:16,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:13:16,310 INFO L85 PathProgramCache]: Analyzing trace with hash 2142105888, now seen corresponding path program 1 times [2022-10-15 18:13:16,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:13:16,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897327680] [2022-10-15 18:13:16,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:13:16,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:13:16,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:13:16,413 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-10-15 18:13:16,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:13:16,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897327680] [2022-10-15 18:13:16,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897327680] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:13:16,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:13:16,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:13:16,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463876192] [2022-10-15 18:13:16,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:13:16,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:13:16,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:13:16,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:13:16,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:13:16,416 INFO L87 Difference]: Start difference. First operand 318 states and 376 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:13:16,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:13:16,435 INFO L93 Difference]: Finished difference Result 316 states and 369 transitions. [2022-10-15 18:13:16,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:13:16,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-10-15 18:13:16,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:13:16,438 INFO L225 Difference]: With dead ends: 316 [2022-10-15 18:13:16,438 INFO L226 Difference]: Without dead ends: 316 [2022-10-15 18:13:16,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:13:16,440 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 26 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:13:16,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 44 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:13:16,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-10-15 18:13:16,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 316. [2022-10-15 18:13:16,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 306 states have (on average 1.1928104575163399) internal successors, (365), 312 states have internal predecessors, (365), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-15 18:13:16,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 369 transitions. [2022-10-15 18:13:16,449 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 369 transitions. Word has length 45 [2022-10-15 18:13:16,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:13:16,450 INFO L495 AbstractCegarLoop]: Abstraction has 316 states and 369 transitions. [2022-10-15 18:13:16,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:13:16,450 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 369 transitions. [2022-10-15 18:13:16,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-10-15 18:13:16,458 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:13:16,458 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:13:16,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-10-15 18:13:16,459 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-15 18:13:16,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:13:16,459 INFO L85 PathProgramCache]: Analyzing trace with hash 2142105889, now seen corresponding path program 1 times [2022-10-15 18:13:16,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:13:16,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273401881] [2022-10-15 18:13:16,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:13:16,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:13:16,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:13:16,640 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:13:16,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:13:16,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273401881] [2022-10-15 18:13:16,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273401881] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:13:16,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541933875] [2022-10-15 18:13:16,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:13:16,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:13:16,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:13:16,644 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:13:16,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-15 18:13:16,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:13:16,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-15 18:13:16,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:13:16,792 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:13:16,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:13:16,903 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:13:16,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541933875] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:13:16,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:13:16,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-10-15 18:13:16,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066060580] [2022-10-15 18:13:16,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:13:16,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-15 18:13:16,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:13:16,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-15 18:13:16,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-15 18:13:16,909 INFO L87 Difference]: Start difference. First operand 316 states and 369 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:13:17,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:13:17,093 INFO L93 Difference]: Finished difference Result 1054 states and 1181 transitions. [2022-10-15 18:13:17,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-15 18:13:17,093 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-10-15 18:13:17,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:13:17,101 INFO L225 Difference]: With dead ends: 1054 [2022-10-15 18:13:17,101 INFO L226 Difference]: Without dead ends: 1054 [2022-10-15 18:13:17,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-15 18:13:17,103 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 527 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:13:17,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 290 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:13:17,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2022-10-15 18:13:17,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1036. [2022-10-15 18:13:17,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1026 states have (on average 1.1471734892787524) internal successors, (1177), 1032 states have internal predecessors, (1177), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-15 18:13:17,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 1181 transitions. [2022-10-15 18:13:17,126 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 1181 transitions. Word has length 45 [2022-10-15 18:13:17,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:13:17,127 INFO L495 AbstractCegarLoop]: Abstraction has 1036 states and 1181 transitions. [2022-10-15 18:13:17,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:13:17,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 1181 transitions. [2022-10-15 18:13:17,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-10-15 18:13:17,130 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:13:17,131 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:13:17,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-15 18:13:17,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:13:17,347 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-15 18:13:17,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:13:17,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1783312127, now seen corresponding path program 2 times [2022-10-15 18:13:17,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:13:17,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988438048] [2022-10-15 18:13:17,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:13:17,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:13:17,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:13:17,791 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:13:17,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:13:17,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988438048] [2022-10-15 18:13:17,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988438048] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:13:17,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977773315] [2022-10-15 18:13:17,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:13:17,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:13:17,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:13:17,794 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:13:17,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-15 18:13:17,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 18:13:17,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:13:17,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-15 18:13:17,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:13:17,900 INFO L356 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-10-15 18:13:17,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-10-15 18:13:18,366 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 560 trivial. 0 not checked. [2022-10-15 18:13:18,367 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:13:18,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977773315] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:13:18,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:13:18,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [17] total 18 [2022-10-15 18:13:18,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202196328] [2022-10-15 18:13:18,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:13:18,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:13:18,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:13:18,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:13:18,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-10-15 18:13:18,369 INFO L87 Difference]: Start difference. First operand 1036 states and 1181 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:13:18,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:13:18,410 INFO L93 Difference]: Finished difference Result 1145 states and 1309 transitions. [2022-10-15 18:13:18,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:13:18,411 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2022-10-15 18:13:18,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:13:18,417 INFO L225 Difference]: With dead ends: 1145 [2022-10-15 18:13:18,417 INFO L226 Difference]: Without dead ends: 1145 [2022-10-15 18:13:18,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-10-15 18:13:18,418 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 24 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:13:18,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 57 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:13:18,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2022-10-15 18:13:18,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 1116. [2022-10-15 18:13:18,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1106 states have (on average 1.150994575045208) internal successors, (1273), 1112 states have internal predecessors, (1273), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-15 18:13:18,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 1277 transitions. [2022-10-15 18:13:18,442 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 1277 transitions. Word has length 93 [2022-10-15 18:13:18,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:13:18,443 INFO L495 AbstractCegarLoop]: Abstraction has 1116 states and 1277 transitions. [2022-10-15 18:13:18,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:13:18,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 1277 transitions. [2022-10-15 18:13:18,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-10-15 18:13:18,445 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:13:18,446 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:13:18,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-15 18:13:18,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:13:18,660 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-15 18:13:18,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:13:18,661 INFO L85 PathProgramCache]: Analyzing trace with hash 552176316, now seen corresponding path program 1 times [2022-10-15 18:13:18,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:13:18,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16097793] [2022-10-15 18:13:18,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:13:18,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:13:18,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:13:19,153 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 0 proven. 560 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:13:19,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:13:19,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16097793] [2022-10-15 18:13:19,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16097793] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:13:19,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932404865] [2022-10-15 18:13:19,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:13:19,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:13:19,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:13:19,156 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:13:19,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-15 18:13:19,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:13:19,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-15 18:13:19,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:13:19,413 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 0 proven. 560 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:13:19,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:13:19,800 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 0 proven. 560 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:13:19,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932404865] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:13:19,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:13:19,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-10-15 18:13:19,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088721595] [2022-10-15 18:13:19,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:13:19,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-10-15 18:13:19,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:13:19,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-10-15 18:13:19,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-10-15 18:13:19,804 INFO L87 Difference]: Start difference. First operand 1116 states and 1277 transitions. Second operand has 33 states, 33 states have (on average 5.636363636363637) internal successors, (186), 33 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:13:20,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:13:20,313 INFO L93 Difference]: Finished difference Result 2941 states and 3293 transitions. [2022-10-15 18:13:20,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-10-15 18:13:20,314 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.636363636363637) internal successors, (186), 33 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-10-15 18:13:20,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:13:20,327 INFO L225 Difference]: With dead ends: 2941 [2022-10-15 18:13:20,327 INFO L226 Difference]: Without dead ends: 2941 [2022-10-15 18:13:20,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-10-15 18:13:20,329 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 1343 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1343 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 18:13:20,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1343 Valid, 465 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 18:13:20,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2941 states. [2022-10-15 18:13:20,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2941 to 2892. [2022-10-15 18:13:20,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2892 states, 2882 states have (on average 1.1412213740458015) internal successors, (3289), 2888 states have internal predecessors, (3289), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-15 18:13:20,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2892 states to 2892 states and 3293 transitions. [2022-10-15 18:13:20,398 INFO L78 Accepts]: Start accepts. Automaton has 2892 states and 3293 transitions. Word has length 94 [2022-10-15 18:13:20,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:13:20,399 INFO L495 AbstractCegarLoop]: Abstraction has 2892 states and 3293 transitions. [2022-10-15 18:13:20,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.636363636363637) internal successors, (186), 33 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:13:20,399 INFO L276 IsEmpty]: Start isEmpty. Operand 2892 states and 3293 transitions. [2022-10-15 18:13:20,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-10-15 18:13:20,402 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:13:20,402 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1] [2022-10-15 18:13:20,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-15 18:13:20,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-10-15 18:13:20,614 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-15 18:13:20,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:13:20,615 INFO L85 PathProgramCache]: Analyzing trace with hash 943104437, now seen corresponding path program 3 times [2022-10-15 18:13:20,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:13:20,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652529872] [2022-10-15 18:13:20,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:13:20,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:13:20,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:13:21,558 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 0 proven. 475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:13:21,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:13:21,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652529872] [2022-10-15 18:13:21,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652529872] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:13:21,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392383577] [2022-10-15 18:13:21,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 18:13:21,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:13:21,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:13:21,561 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:13:21,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-15 18:13:22,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-10-15 18:13:22,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:13:22,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 53 conjunts are in the unsatisfiable core [2022-10-15 18:13:22,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:13:22,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:13:22,495 INFO L356 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-10-15 18:13:22,495 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2022-10-15 18:13:22,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2022-10-15 18:13:23,744 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 0 proven. 475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:13:23,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:13:24,843 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 0 proven. 475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:13:24,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392383577] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:13:24,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:13:24,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 22, 12] total 44 [2022-10-15 18:13:24,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155100783] [2022-10-15 18:13:24,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:13:24,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-10-15 18:13:24,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:13:24,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-10-15 18:13:24,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=1539, Unknown=0, NotChecked=0, Total=1980 [2022-10-15 18:13:24,848 INFO L87 Difference]: Start difference. First operand 2892 states and 3293 transitions. Second operand has 45 states, 44 states have (on average 6.704545454545454) internal successors, (295), 45 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:13:32,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:13:32,095 INFO L93 Difference]: Finished difference Result 13307 states and 16024 transitions. [2022-10-15 18:13:32,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-10-15 18:13:32,096 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 6.704545454545454) internal successors, (295), 45 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2022-10-15 18:13:32,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:13:32,156 INFO L225 Difference]: With dead ends: 13307 [2022-10-15 18:13:32,156 INFO L226 Difference]: Without dead ends: 13307 [2022-10-15 18:13:32,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1392, Invalid=4158, Unknown=0, NotChecked=0, Total=5550 [2022-10-15 18:13:32,160 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 3997 mSDsluCounter, 5611 mSDsCounter, 0 mSdLazyCounter, 9221 mSolverCounterSat, 352 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4021 SdHoareTripleChecker+Valid, 5899 SdHoareTripleChecker+Invalid, 9573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 352 IncrementalHoareTripleChecker+Valid, 9221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:13:32,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4021 Valid, 5899 Invalid, 9573 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [352 Valid, 9221 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-10-15 18:13:32,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13307 states. [2022-10-15 18:13:32,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13307 to 4386. [2022-10-15 18:13:32,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4386 states, 4376 states have (on average 1.1300274223034734) internal successors, (4945), 4382 states have internal predecessors, (4945), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-15 18:13:32,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4386 states to 4386 states and 4949 transitions. [2022-10-15 18:13:32,311 INFO L78 Accepts]: Start accepts. Automaton has 4386 states and 4949 transitions. Word has length 99 [2022-10-15 18:13:32,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:13:32,312 INFO L495 AbstractCegarLoop]: Abstraction has 4386 states and 4949 transitions. [2022-10-15 18:13:32,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 6.704545454545454) internal successors, (295), 45 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:13:32,312 INFO L276 IsEmpty]: Start isEmpty. Operand 4386 states and 4949 transitions. [2022-10-15 18:13:32,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-10-15 18:13:32,319 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:13:32,319 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:13:32,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-15 18:13:32,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-10-15 18:13:32,534 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-15 18:13:32,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:13:32,535 INFO L85 PathProgramCache]: Analyzing trace with hash -617250052, now seen corresponding path program 2 times [2022-10-15 18:13:32,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:13:32,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184035265] [2022-10-15 18:13:32,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:13:32,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:13:32,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:13:33,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2642 backedges. 0 proven. 2640 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:13:33,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:13:33,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184035265] [2022-10-15 18:13:33,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184035265] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:13:33,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157109716] [2022-10-15 18:13:33,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:13:33,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:13:33,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:13:33,983 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:13:33,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-15 18:13:34,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 18:13:34,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:13:34,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 711 conjuncts, 32 conjunts are in the unsatisfiable core [2022-10-15 18:13:34,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:13:34,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2642 backedges. 0 proven. 2640 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:13:34,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:13:35,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2642 backedges. 0 proven. 2640 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:13:35,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157109716] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:13:35,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:13:35,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2022-10-15 18:13:35,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210159224] [2022-10-15 18:13:35,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:13:35,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-10-15 18:13:35,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:13:35,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-10-15 18:13:35,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-10-15 18:13:35,880 INFO L87 Difference]: Start difference. First operand 4386 states and 4949 transitions. Second operand has 65 states, 65 states have (on average 5.815384615384615) internal successors, (378), 65 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:13:37,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:13:37,803 INFO L93 Difference]: Finished difference Result 11495 states and 12821 transitions. [2022-10-15 18:13:37,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-10-15 18:13:37,804 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 5.815384615384615) internal successors, (378), 65 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2022-10-15 18:13:37,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:13:37,844 INFO L225 Difference]: With dead ends: 11495 [2022-10-15 18:13:37,844 INFO L226 Difference]: Without dead ends: 11495 [2022-10-15 18:13:37,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-10-15 18:13:37,847 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 3185 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3185 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-15 18:13:37,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3185 Valid, 807 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-15 18:13:37,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11495 states. [2022-10-15 18:13:38,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11495 to 11394. [2022-10-15 18:13:38,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11394 states, 11384 states have (on average 1.1258784258608574) internal successors, (12817), 11390 states have internal predecessors, (12817), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-15 18:13:38,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11394 states to 11394 states and 12821 transitions. [2022-10-15 18:13:38,081 INFO L78 Accepts]: Start accepts. Automaton has 11394 states and 12821 transitions. Word has length 190 [2022-10-15 18:13:38,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:13:38,082 INFO L495 AbstractCegarLoop]: Abstraction has 11394 states and 12821 transitions. [2022-10-15 18:13:38,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 5.815384615384615) internal successors, (378), 65 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:13:38,082 INFO L276 IsEmpty]: Start isEmpty. Operand 11394 states and 12821 transitions. [2022-10-15 18:13:38,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-10-15 18:13:38,091 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:13:38,091 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 22, 22, 22, 1, 1, 1] [2022-10-15 18:13:38,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-15 18:13:38,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-10-15 18:13:38,306 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-15 18:13:38,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:13:38,307 INFO L85 PathProgramCache]: Analyzing trace with hash 65225397, now seen corresponding path program 4 times [2022-10-15 18:13:38,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:13:38,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176729197] [2022-10-15 18:13:38,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:13:38,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:13:38,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:13:40,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 0 proven. 2233 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:13:40,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:13:40,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176729197] [2022-10-15 18:13:40,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176729197] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:13:40,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141825108] [2022-10-15 18:13:40,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-15 18:13:40,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:13:40,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:13:40,593 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) [2022-10-15 18:13:40,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-10-15 18:13:48,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-15 18:13:48,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:13:48,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 53 conjunts are in the unsatisfiable core [2022-10-15 18:13:48,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:13:48,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:13:48,932 INFO L356 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-10-15 18:13:48,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2022-10-15 18:13:48,954 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2022-10-15 18:13:50,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 0 proven. 2233 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:13:50,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:13:52,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 0 proven. 2233 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:13:52,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141825108] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:13:52,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:13:52,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 69 [2022-10-15 18:13:52,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398108551] [2022-10-15 18:13:52,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:13:52,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-10-15 18:13:52,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:13:52,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-10-15 18:13:52,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1194, Invalid=3636, Unknown=0, NotChecked=0, Total=4830 [2022-10-15 18:13:52,926 INFO L87 Difference]: Start difference. First operand 11394 states and 12821 transitions. Second operand has 70 states, 69 states have (on average 8.855072463768115) internal successors, (611), 70 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)