./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/verifythis/prefixsum_rec.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/verifythis/prefixsum_rec.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 81bdf17d0130e934dcb31a2f76f595e947b99d6273334b7f05365a624466aeab --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 13:17:38,574 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 13:17:38,650 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-12 13:17:38,657 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 13:17:38,658 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 13:17:38,689 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 13:17:38,689 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 13:17:38,690 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 13:17:38,691 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 13:17:38,692 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 13:17:38,692 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 13:17:38,693 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 13:17:38,693 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 13:17:38,695 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 13:17:38,695 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 13:17:38,696 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 13:17:38,696 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 13:17:38,696 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 13:17:38,697 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 13:17:38,697 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 13:17:38,697 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-12 13:17:38,700 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-12 13:17:38,701 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-12 13:17:38,701 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 13:17:38,701 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-12 13:17:38,701 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 13:17:38,702 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-12 13:17:38,702 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 13:17:38,702 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 13:17:38,702 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 13:17:38,703 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 13:17:38,703 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 13:17:38,703 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 13:17:38,704 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 13:17:38,704 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 13:17:38,705 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 13:17:38,705 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 13:17:38,705 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 13:17:38,706 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 13:17:38,706 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 13:17:38,706 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 13:17:38,707 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 13:17:38,707 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81bdf17d0130e934dcb31a2f76f595e947b99d6273334b7f05365a624466aeab [2024-11-12 13:17:38,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 13:17:38,976 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 13:17:38,980 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 13:17:38,981 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 13:17:38,982 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 13:17:38,983 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/prefixsum_rec.c [2024-11-12 13:17:40,476 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 13:17:40,666 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 13:17:40,667 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/prefixsum_rec.c [2024-11-12 13:17:40,676 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9d93e697/c262c11af3874517a097c2b560a4f649/FLAG97792b4ef [2024-11-12 13:17:40,688 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9d93e697/c262c11af3874517a097c2b560a4f649 [2024-11-12 13:17:40,691 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 13:17:40,692 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 13:17:40,695 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 13:17:40,695 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 13:17:40,703 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 13:17:40,704 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:17:40" (1/1) ... [2024-11-12 13:17:40,705 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e319300 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:17:40, skipping insertion in model container [2024-11-12 13:17:40,705 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:17:40" (1/1) ... [2024-11-12 13:17:40,723 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 13:17:40,921 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 13:17:40,931 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 13:17:40,952 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 13:17:40,969 INFO L204 MainTranslator]: Completed translation [2024-11-12 13:17:40,970 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:17:40 WrapperNode [2024-11-12 13:17:40,970 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 13:17:40,972 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 13:17:40,972 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 13:17:40,973 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 13:17:40,979 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:17:40" (1/1) ... [2024-11-12 13:17:40,987 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:17:40" (1/1) ... [2024-11-12 13:17:41,010 INFO L138 Inliner]: procedures = 22, calls = 38, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 83 [2024-11-12 13:17:41,010 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 13:17:41,011 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 13:17:41,011 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 13:17:41,011 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 13:17:41,020 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:17:40" (1/1) ... [2024-11-12 13:17:41,021 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:17:40" (1/1) ... [2024-11-12 13:17:41,024 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:17:40" (1/1) ... [2024-11-12 13:17:41,046 INFO L175 MemorySlicer]: Split 16 memory accesses to 2 slices as follows [2, 14]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 6 writes are split as follows [0, 6]. [2024-11-12 13:17:41,047 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:17:40" (1/1) ... [2024-11-12 13:17:41,047 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:17:40" (1/1) ... [2024-11-12 13:17:41,054 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:17:40" (1/1) ... [2024-11-12 13:17:41,058 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:17:40" (1/1) ... [2024-11-12 13:17:41,059 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:17:40" (1/1) ... [2024-11-12 13:17:41,060 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:17:40" (1/1) ... [2024-11-12 13:17:41,063 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 13:17:41,064 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 13:17:41,064 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 13:17:41,064 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 13:17:41,065 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:17:40" (1/1) ... [2024-11-12 13:17:41,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 13:17:41,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:17:41,101 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-12 13:17:41,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-12 13:17:41,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 13:17:41,145 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-12 13:17:41,145 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-12 13:17:41,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 13:17:41,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-12 13:17:41,147 INFO L130 BoogieDeclarations]: Found specification of procedure downsweep [2024-11-12 13:17:41,147 INFO L138 BoogieDeclarations]: Found implementation of procedure downsweep [2024-11-12 13:17:41,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-12 13:17:41,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-12 13:17:41,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-12 13:17:41,147 INFO L130 BoogieDeclarations]: Found specification of procedure upsweep [2024-11-12 13:17:41,147 INFO L138 BoogieDeclarations]: Found implementation of procedure upsweep [2024-11-12 13:17:41,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 13:17:41,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 13:17:41,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-12 13:17:41,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-12 13:17:41,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2024-11-12 13:17:41,148 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2024-11-12 13:17:41,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-12 13:17:41,237 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 13:17:41,239 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 13:17:41,619 INFO L? ?]: Removed 103 outVars from TransFormulas that were not future-live. [2024-11-12 13:17:41,619 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 13:17:41,641 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 13:17:41,642 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-12 13:17:41,643 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:17:41 BoogieIcfgContainer [2024-11-12 13:17:41,643 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 13:17:41,645 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 13:17:41,645 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 13:17:41,650 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 13:17:41,651 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 01:17:40" (1/3) ... [2024-11-12 13:17:41,652 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ab6b736 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:17:41, skipping insertion in model container [2024-11-12 13:17:41,652 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:17:40" (2/3) ... [2024-11-12 13:17:41,652 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ab6b736 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:17:41, skipping insertion in model container [2024-11-12 13:17:41,652 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:17:41" (3/3) ... [2024-11-12 13:17:41,654 INFO L112 eAbstractionObserver]: Analyzing ICFG prefixsum_rec.c [2024-11-12 13:17:41,673 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 13:17:41,673 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2024-11-12 13:17:41,717 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 13:17:41,724 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@243746dd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 13:17:41,724 INFO L334 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2024-11-12 13:17:41,730 INFO L276 IsEmpty]: Start isEmpty. Operand has 107 states, 58 states have (on average 1.7586206896551724) internal successors, (102), 92 states have internal predecessors, (102), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-12 13:17:41,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-12 13:17:41,739 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:17:41,739 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:17:41,740 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-12 13:17:41,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:17:41,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1272586388, now seen corresponding path program 1 times [2024-11-12 13:17:41,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:17:41,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294377441] [2024-11-12 13:17:41,757 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:17:41,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:17:41,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:41,964 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-12 13:17:41,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:41,974 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-12 13:17:41,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:41,990 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-12 13:17:41,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:42,003 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-12 13:17:42,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:42,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-12 13:17:42,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:17:42,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294377441] [2024-11-12 13:17:42,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294377441] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:17:42,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:17:42,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 13:17:42,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218213153] [2024-11-12 13:17:42,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:17:42,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 13:17:42,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:17:42,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 13:17:42,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 13:17:42,059 INFO L87 Difference]: Start difference. First operand has 107 states, 58 states have (on average 1.7586206896551724) internal successors, (102), 92 states have internal predecessors, (102), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-12 13:17:42,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:17:42,167 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2024-11-12 13:17:42,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 13:17:42,170 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2024-11-12 13:17:42,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:17:42,179 INFO L225 Difference]: With dead ends: 115 [2024-11-12 13:17:42,180 INFO L226 Difference]: Without dead ends: 113 [2024-11-12 13:17:42,182 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 13:17:42,187 INFO L435 NwaCegarLoop]: 105 mSDtfsCounter, 27 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-12 13:17:42,189 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 178 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-12 13:17:42,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-12 13:17:42,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 104. [2024-11-12 13:17:42,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 56 states have (on average 1.6785714285714286) internal successors, (94), 89 states have internal predecessors, (94), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-12 13:17:42,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 114 transitions. [2024-11-12 13:17:42,233 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 114 transitions. Word has length 29 [2024-11-12 13:17:42,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:17:42,234 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 114 transitions. [2024-11-12 13:17:42,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-12 13:17:42,234 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 114 transitions. [2024-11-12 13:17:42,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-12 13:17:42,236 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:17:42,236 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:17:42,237 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 13:17:42,237 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-12 13:17:42,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:17:42,238 INFO L85 PathProgramCache]: Analyzing trace with hash 392066644, now seen corresponding path program 1 times [2024-11-12 13:17:42,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:17:42,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795764845] [2024-11-12 13:17:42,238 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:17:42,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:17:42,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:42,549 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-12 13:17:42,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:42,555 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-12 13:17:42,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:42,570 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-12 13:17:42,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:42,577 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-12 13:17:42,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:42,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-12 13:17:42,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:17:42,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795764845] [2024-11-12 13:17:42,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795764845] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:17:42,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:17:42,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 13:17:42,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938616512] [2024-11-12 13:17:42,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:17:42,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 13:17:42,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:17:42,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 13:17:42,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-12 13:17:42,595 INFO L87 Difference]: Start difference. First operand 104 states and 114 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-12 13:17:42,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:17:42,780 INFO L93 Difference]: Finished difference Result 110 states and 120 transitions. [2024-11-12 13:17:42,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 13:17:42,781 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2024-11-12 13:17:42,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:17:42,783 INFO L225 Difference]: With dead ends: 110 [2024-11-12 13:17:42,783 INFO L226 Difference]: Without dead ends: 110 [2024-11-12 13:17:42,783 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-12 13:17:42,784 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 54 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-12 13:17:42,785 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 244 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-12 13:17:42,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-11-12 13:17:42,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2024-11-12 13:17:42,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 56 states have (on average 1.625) internal successors, (91), 86 states have internal predecessors, (91), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-12 13:17:42,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2024-11-12 13:17:42,800 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 29 [2024-11-12 13:17:42,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:17:42,802 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2024-11-12 13:17:42,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-12 13:17:42,802 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2024-11-12 13:17:42,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-12 13:17:42,803 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:17:42,803 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:17:42,803 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-12 13:17:42,804 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-12 13:17:42,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:17:42,804 INFO L85 PathProgramCache]: Analyzing trace with hash 392066645, now seen corresponding path program 1 times [2024-11-12 13:17:42,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:17:42,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492566798] [2024-11-12 13:17:42,805 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:17:42,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:17:42,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:43,570 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-12 13:17:43,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:43,578 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-12 13:17:43,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:43,595 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-12 13:17:43,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:43,611 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-12 13:17:43,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:43,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-12 13:17:43,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:17:43,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492566798] [2024-11-12 13:17:43,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492566798] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:17:43,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:17:43,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-12 13:17:43,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116690931] [2024-11-12 13:17:43,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:17:43,630 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-12 13:17:43,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:17:43,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-12 13:17:43,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-12 13:17:43,634 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-12 13:17:44,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:17:44,265 INFO L93 Difference]: Finished difference Result 135 states and 155 transitions. [2024-11-12 13:17:44,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-12 13:17:44,266 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2024-11-12 13:17:44,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:17:44,269 INFO L225 Difference]: With dead ends: 135 [2024-11-12 13:17:44,270 INFO L226 Difference]: Without dead ends: 135 [2024-11-12 13:17:44,271 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2024-11-12 13:17:44,272 INFO L435 NwaCegarLoop]: 97 mSDtfsCounter, 83 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-12 13:17:44,273 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 636 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-12 13:17:44,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-11-12 13:17:44,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 112. [2024-11-12 13:17:44,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 64 states have (on average 1.578125) internal successors, (101), 94 states have internal predecessors, (101), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-12 13:17:44,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 127 transitions. [2024-11-12 13:17:44,290 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 127 transitions. Word has length 29 [2024-11-12 13:17:44,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:17:44,290 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 127 transitions. [2024-11-12 13:17:44,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-12 13:17:44,290 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 127 transitions. [2024-11-12 13:17:44,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-12 13:17:44,294 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:17:44,294 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:17:44,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-12 13:17:44,295 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-12 13:17:44,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:17:44,296 INFO L85 PathProgramCache]: Analyzing trace with hash -730835859, now seen corresponding path program 1 times [2024-11-12 13:17:44,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:17:44,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081720184] [2024-11-12 13:17:44,296 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:17:44,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:17:44,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:44,565 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-12 13:17:44,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:44,568 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-12 13:17:44,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:44,578 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-12 13:17:44,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:44,585 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-12 13:17:44,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:44,592 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-12 13:17:44,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:17:44,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081720184] [2024-11-12 13:17:44,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081720184] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:17:44,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:17:44,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-12 13:17:44,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700485273] [2024-11-12 13:17:44,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:17:44,594 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-12 13:17:44,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:17:44,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-12 13:17:44,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-12 13:17:44,595 INFO L87 Difference]: Start difference. First operand 112 states and 127 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-12 13:17:44,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:17:44,836 INFO L93 Difference]: Finished difference Result 125 states and 143 transitions. [2024-11-12 13:17:44,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 13:17:44,837 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2024-11-12 13:17:44,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:17:44,838 INFO L225 Difference]: With dead ends: 125 [2024-11-12 13:17:44,838 INFO L226 Difference]: Without dead ends: 125 [2024-11-12 13:17:44,839 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-12 13:17:44,840 INFO L435 NwaCegarLoop]: 91 mSDtfsCounter, 33 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-12 13:17:44,840 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 374 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-12 13:17:44,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-11-12 13:17:44,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 115. [2024-11-12 13:17:44,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 67 states have (on average 1.5970149253731343) internal successors, (107), 97 states have internal predecessors, (107), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-12 13:17:44,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 133 transitions. [2024-11-12 13:17:44,848 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 133 transitions. Word has length 30 [2024-11-12 13:17:44,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:17:44,848 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 133 transitions. [2024-11-12 13:17:44,849 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-12 13:17:44,849 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 133 transitions. [2024-11-12 13:17:44,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-12 13:17:44,850 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:17:44,850 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:17:44,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-12 13:17:44,850 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-12 13:17:44,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:17:44,851 INFO L85 PathProgramCache]: Analyzing trace with hash -730835860, now seen corresponding path program 1 times [2024-11-12 13:17:44,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:17:44,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440255873] [2024-11-12 13:17:44,851 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:17:44,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:17:44,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:44,897 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-12 13:17:44,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:44,900 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-12 13:17:44,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:44,907 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-12 13:17:44,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:44,910 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-12 13:17:44,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:44,915 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-12 13:17:44,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:17:44,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440255873] [2024-11-12 13:17:44,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440255873] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:17:44,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:17:44,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 13:17:44,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504073468] [2024-11-12 13:17:44,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:17:44,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 13:17:44,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:17:44,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 13:17:44,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-12 13:17:44,918 INFO L87 Difference]: Start difference. First operand 115 states and 133 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-12 13:17:45,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:17:45,025 INFO L93 Difference]: Finished difference Result 123 states and 140 transitions. [2024-11-12 13:17:45,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 13:17:45,027 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2024-11-12 13:17:45,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:17:45,028 INFO L225 Difference]: With dead ends: 123 [2024-11-12 13:17:45,028 INFO L226 Difference]: Without dead ends: 123 [2024-11-12 13:17:45,028 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-12 13:17:45,029 INFO L435 NwaCegarLoop]: 88 mSDtfsCounter, 54 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-12 13:17:45,029 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 254 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-12 13:17:45,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-11-12 13:17:45,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 114. [2024-11-12 13:17:45,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 67 states have (on average 1.5671641791044777) internal successors, (105), 96 states have internal predecessors, (105), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-12 13:17:45,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 131 transitions. [2024-11-12 13:17:45,043 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 131 transitions. Word has length 30 [2024-11-12 13:17:45,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:17:45,043 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 131 transitions. [2024-11-12 13:17:45,044 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-12 13:17:45,044 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 131 transitions. [2024-11-12 13:17:45,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-12 13:17:45,044 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:17:45,045 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:17:45,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-12 13:17:45,045 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-12 13:17:45,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:17:45,048 INFO L85 PathProgramCache]: Analyzing trace with hash 529290709, now seen corresponding path program 1 times [2024-11-12 13:17:45,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:17:45,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150894709] [2024-11-12 13:17:45,048 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:17:45,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:17:45,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:45,559 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-12 13:17:45,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:45,564 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-12 13:17:45,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:45,579 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-12 13:17:45,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:45,585 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-12 13:17:45,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:45,591 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-12 13:17:45,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:17:45,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150894709] [2024-11-12 13:17:45,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150894709] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:17:45,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149547708] [2024-11-12 13:17:45,592 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:17:45,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:17:45,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:17:45,595 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) [2024-11-12 13:17:45,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-12 13:17:45,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:45,668 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-12 13:17:45,673 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:17:45,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-12 13:17:45,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-12 13:17:46,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 13:17:46,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 32 [2024-11-12 13:17:46,124 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 13:17:46,124 INFO L378 Elim1Store]: Elim1 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 11 treesize of output 11 [2024-11-12 13:17:46,441 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 13:17:46,441 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:17:46,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149547708] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:17:46,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-12 13:17:46,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2024-11-12 13:17:46,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535605502] [2024-11-12 13:17:46,634 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-12 13:17:46,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-12 13:17:46,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:17:46,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-12 13:17:46,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2024-11-12 13:17:46,637 INFO L87 Difference]: Start difference. First operand 114 states and 131 transitions. Second operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-12 13:17:47,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:17:47,828 INFO L93 Difference]: Finished difference Result 123 states and 137 transitions. [2024-11-12 13:17:47,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-12 13:17:47,829 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) Word has length 30 [2024-11-12 13:17:47,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:17:47,830 INFO L225 Difference]: With dead ends: 123 [2024-11-12 13:17:47,830 INFO L226 Difference]: Without dead ends: 123 [2024-11-12 13:17:47,831 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2024-11-12 13:17:47,832 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 184 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-12 13:17:47,832 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 568 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-12 13:17:47,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-11-12 13:17:47,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 102. [2024-11-12 13:17:47,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 59 states have (on average 1.5593220338983051) internal successors, (92), 87 states have internal predecessors, (92), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-12 13:17:47,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 112 transitions. [2024-11-12 13:17:47,849 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 112 transitions. Word has length 30 [2024-11-12 13:17:47,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:17:47,850 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 112 transitions. [2024-11-12 13:17:47,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-12 13:17:47,850 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 112 transitions. [2024-11-12 13:17:47,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-12 13:17:47,851 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:17:47,851 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:17:47,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-12 13:17:48,051 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-12 13:17:48,052 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-12 13:17:48,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:17:48,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1141814566, now seen corresponding path program 1 times [2024-11-12 13:17:48,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:17:48,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107634337] [2024-11-12 13:17:48,053 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:17:48,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:17:48,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:48,222 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-12 13:17:48,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:48,226 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-12 13:17:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:48,257 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-12 13:17:48,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:48,261 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-12 13:17:48,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:48,264 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 13:17:48,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:17:48,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107634337] [2024-11-12 13:17:48,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107634337] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:17:48,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832989325] [2024-11-12 13:17:48,265 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:17:48,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:17:48,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:17:48,267 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) [2024-11-12 13:17:48,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-12 13:17:48,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:48,339 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-12 13:17:48,341 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:17:48,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-12 13:17:48,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-12 13:17:48,539 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-12 13:17:48,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-12 13:17:48,552 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 13:17:48,553 INFO L378 Elim1Store]: Elim1 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 11 treesize of output 11 [2024-11-12 13:17:48,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:17:48,883 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:17:49,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832989325] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:17:49,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-12 13:17:49,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2024-11-12 13:17:49,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933305171] [2024-11-12 13:17:49,243 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-12 13:17:49,243 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-12 13:17:49,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:17:49,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-12 13:17:49,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2024-11-12 13:17:49,244 INFO L87 Difference]: Start difference. First operand 102 states and 112 transitions. Second operand has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 7 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-12 13:17:50,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:17:50,048 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2024-11-12 13:17:50,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-12 13:17:50,048 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 7 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) Word has length 33 [2024-11-12 13:17:50,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:17:50,049 INFO L225 Difference]: With dead ends: 120 [2024-11-12 13:17:50,049 INFO L226 Difference]: Without dead ends: 117 [2024-11-12 13:17:50,050 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2024-11-12 13:17:50,050 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 263 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-12 13:17:50,051 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 479 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-12 13:17:50,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-11-12 13:17:50,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 106. [2024-11-12 13:17:50,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 91 states have internal predecessors, (96), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-12 13:17:50,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 116 transitions. [2024-11-12 13:17:50,062 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 116 transitions. Word has length 33 [2024-11-12 13:17:50,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:17:50,063 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 116 transitions. [2024-11-12 13:17:50,063 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 7 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-12 13:17:50,063 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 116 transitions. [2024-11-12 13:17:50,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-12 13:17:50,064 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:17:50,064 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:17:50,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-12 13:17:50,264 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-12 13:17:50,265 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-12 13:17:50,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:17:50,265 INFO L85 PathProgramCache]: Analyzing trace with hash 826925320, now seen corresponding path program 1 times [2024-11-12 13:17:50,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:17:50,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590668225] [2024-11-12 13:17:50,266 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:17:50,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:17:50,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:50,542 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-12 13:17:50,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:50,544 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-12 13:17:50,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:50,556 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-12 13:17:50,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:50,561 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-12 13:17:50,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:50,567 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 13:17:50,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:17:50,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590668225] [2024-11-12 13:17:50,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590668225] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:17:50,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438902264] [2024-11-12 13:17:50,568 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:17:50,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:17:50,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:17:50,570 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) [2024-11-12 13:17:50,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-12 13:17:50,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:50,646 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-12 13:17:50,649 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:17:50,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-12 13:17:50,786 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-11-12 13:17:50,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2024-11-12 13:17:51,134 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 13:17:51,134 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:17:51,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438902264] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:17:51,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-12 13:17:51,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2024-11-12 13:17:51,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020433235] [2024-11-12 13:17:51,398 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-12 13:17:51,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-12 13:17:51,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:17:51,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-12 13:17:51,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-11-12 13:17:51,399 INFO L87 Difference]: Start difference. First operand 106 states and 116 transitions. Second operand has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-12 13:17:51,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:17:51,874 INFO L93 Difference]: Finished difference Result 114 states and 124 transitions. [2024-11-12 13:17:51,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-12 13:17:51,874 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 35 [2024-11-12 13:17:51,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:17:51,875 INFO L225 Difference]: With dead ends: 114 [2024-11-12 13:17:51,875 INFO L226 Difference]: Without dead ends: 114 [2024-11-12 13:17:51,876 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2024-11-12 13:17:51,876 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 136 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-12 13:17:51,876 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 511 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-12 13:17:51,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-12 13:17:51,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 105. [2024-11-12 13:17:51,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 63 states have (on average 1.507936507936508) internal successors, (95), 90 states have internal predecessors, (95), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-12 13:17:51,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 115 transitions. [2024-11-12 13:17:51,881 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 115 transitions. Word has length 35 [2024-11-12 13:17:51,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:17:51,881 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 115 transitions. [2024-11-12 13:17:51,882 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-12 13:17:51,882 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 115 transitions. [2024-11-12 13:17:51,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-12 13:17:51,883 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:17:51,883 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:17:51,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-12 13:17:52,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:17:52,084 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-12 13:17:52,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:17:52,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1000164257, now seen corresponding path program 1 times [2024-11-12 13:17:52,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:17:52,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906727809] [2024-11-12 13:17:52,085 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:17:52,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:17:52,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:52,332 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-12 13:17:52,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:52,335 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-12 13:17:52,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:52,375 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-12 13:17:52,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:52,379 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-12 13:17:52,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:52,382 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 13:17:52,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:17:52,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906727809] [2024-11-12 13:17:52,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906727809] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:17:52,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780164276] [2024-11-12 13:17:52,383 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:17:52,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:17:52,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:17:52,385 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) [2024-11-12 13:17:52,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-12 13:17:52,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:52,520 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-12 13:17:52,522 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:17:52,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 3 [2024-11-12 13:17:52,928 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-12 13:17:52,928 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:17:53,229 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-12 13:17:53,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780164276] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:17:53,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:17:53,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 15] total 30 [2024-11-12 13:17:53,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636023190] [2024-11-12 13:17:53,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:17:53,230 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-12 13:17:53,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:17:53,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-12 13:17:53,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2024-11-12 13:17:53,231 INFO L87 Difference]: Start difference. First operand 105 states and 115 transitions. Second operand has 30 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-12 13:17:53,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:17:53,725 INFO L93 Difference]: Finished difference Result 136 states and 153 transitions. [2024-11-12 13:17:53,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-12 13:17:53,726 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) Word has length 38 [2024-11-12 13:17:53,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:17:53,727 INFO L225 Difference]: With dead ends: 136 [2024-11-12 13:17:53,727 INFO L226 Difference]: Without dead ends: 136 [2024-11-12 13:17:53,727 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2024-11-12 13:17:53,728 INFO L435 NwaCegarLoop]: 89 mSDtfsCounter, 51 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1165 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-12 13:17:53,728 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 1165 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-12 13:17:53,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-11-12 13:17:53,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 123. [2024-11-12 13:17:53,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 78 states have (on average 1.4230769230769231) internal successors, (111), 105 states have internal predecessors, (111), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-12 13:17:53,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 137 transitions. [2024-11-12 13:17:53,736 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 137 transitions. Word has length 38 [2024-11-12 13:17:53,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:17:53,736 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 137 transitions. [2024-11-12 13:17:53,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-12 13:17:53,740 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 137 transitions. [2024-11-12 13:17:53,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-12 13:17:53,741 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:17:53,741 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:17:53,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-12 13:17:53,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:17:53,942 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-12 13:17:53,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:17:53,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1122482977, now seen corresponding path program 2 times [2024-11-12 13:17:53,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:17:53,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373017935] [2024-11-12 13:17:53,943 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:17:53,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:17:53,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:54,379 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-12 13:17:54,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:54,382 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-12 13:17:54,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:54,396 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-12 13:17:54,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:54,401 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-12 13:17:54,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:54,407 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-12 13:17:54,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:17:54,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373017935] [2024-11-12 13:17:54,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373017935] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:17:54,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81787120] [2024-11-12 13:17:54,408 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 13:17:54,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:17:54,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:17:54,410 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) [2024-11-12 13:17:54,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-12 13:17:54,530 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 13:17:54,530 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:17:54,536 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-12 13:17:54,538 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:17:54,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-12 13:17:54,778 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-12 13:17:54,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2024-11-12 13:17:55,207 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-12 13:17:55,207 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:17:55,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81787120] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:17:55,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-12 13:17:55,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2024-11-12 13:17:55,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895710565] [2024-11-12 13:17:55,518 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-12 13:17:55,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-12 13:17:55,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:17:55,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-12 13:17:55,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2024-11-12 13:17:55,520 INFO L87 Difference]: Start difference. First operand 123 states and 137 transitions. Second operand has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-12 13:17:56,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:17:56,947 INFO L93 Difference]: Finished difference Result 158 states and 176 transitions. [2024-11-12 13:17:56,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-12 13:17:56,948 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 39 [2024-11-12 13:17:56,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:17:56,950 INFO L225 Difference]: With dead ends: 158 [2024-11-12 13:17:56,950 INFO L226 Difference]: Without dead ends: 158 [2024-11-12 13:17:56,951 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=269, Invalid=1801, Unknown=0, NotChecked=0, Total=2070 [2024-11-12 13:17:56,952 INFO L435 NwaCegarLoop]: 78 mSDtfsCounter, 194 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 1593 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 1244 SdHoareTripleChecker+Invalid, 1625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-12 13:17:56,953 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 1244 Invalid, 1625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1593 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-12 13:17:56,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-11-12 13:17:56,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 129. [2024-11-12 13:17:56,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 85 states have (on average 1.3764705882352941) internal successors, (117), 111 states have internal predecessors, (117), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-12 13:17:56,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 143 transitions. [2024-11-12 13:17:56,958 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 143 transitions. Word has length 39 [2024-11-12 13:17:56,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:17:56,958 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 143 transitions. [2024-11-12 13:17:56,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-12 13:17:56,958 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 143 transitions. [2024-11-12 13:17:56,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-12 13:17:56,959 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:17:56,959 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:17:56,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-12 13:17:57,160 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-12 13:17:57,160 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-12 13:17:57,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:17:57,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1704616107, now seen corresponding path program 1 times [2024-11-12 13:17:57,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:17:57,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661439789] [2024-11-12 13:17:57,161 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:17:57,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:17:57,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:57,473 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-12 13:17:57,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:57,475 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-12 13:17:57,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:57,487 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-12 13:17:57,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:57,491 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-12 13:17:57,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:57,494 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 13:17:57,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:17:57,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661439789] [2024-11-12 13:17:57,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661439789] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:17:57,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635204360] [2024-11-12 13:17:57,495 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:17:57,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:17:57,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:17:57,500 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) [2024-11-12 13:17:57,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-12 13:17:57,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:57,587 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-12 13:17:57,589 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:17:57,845 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 13:17:57,845 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:17:58,224 INFO L378 Elim1Store]: Elim1 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 71 treesize of output 65 [2024-11-12 13:17:58,493 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 13:17:58,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635204360] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:17:58,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:17:58,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2024-11-12 13:17:58,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457043593] [2024-11-12 13:17:58,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:17:58,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-12 13:17:58,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:17:58,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-12 13:17:58,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2024-11-12 13:17:58,496 INFO L87 Difference]: Start difference. First operand 129 states and 143 transitions. Second operand has 36 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 10 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-12 13:17:59,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:17:59,377 INFO L93 Difference]: Finished difference Result 192 states and 212 transitions. [2024-11-12 13:17:59,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-12 13:17:59,377 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 10 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 41 [2024-11-12 13:17:59,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:17:59,378 INFO L225 Difference]: With dead ends: 192 [2024-11-12 13:17:59,378 INFO L226 Difference]: Without dead ends: 192 [2024-11-12 13:17:59,379 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=406, Invalid=2564, Unknown=0, NotChecked=0, Total=2970 [2024-11-12 13:17:59,379 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 201 mSDsluCounter, 1043 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 1122 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-12 13:17:59,380 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 1122 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-12 13:17:59,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-11-12 13:17:59,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 155. [2024-11-12 13:17:59,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 104 states have (on average 1.4615384615384615) internal successors, (152), 130 states have internal predecessors, (152), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-11-12 13:17:59,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 188 transitions. [2024-11-12 13:17:59,388 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 188 transitions. Word has length 41 [2024-11-12 13:17:59,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:17:59,389 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 188 transitions. [2024-11-12 13:17:59,389 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 10 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-12 13:17:59,389 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 188 transitions. [2024-11-12 13:17:59,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-12 13:17:59,390 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:17:59,390 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:17:59,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-12 13:17:59,593 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:17:59,593 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting upsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-12 13:17:59,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:17:59,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1704616108, now seen corresponding path program 1 times [2024-11-12 13:17:59,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:17:59,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704129703] [2024-11-12 13:17:59,594 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:17:59,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:17:59,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:59,673 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-12 13:17:59,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:59,676 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-12 13:17:59,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:59,684 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-12 13:17:59,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:59,686 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-12 13:17:59,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:17:59,687 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-12 13:17:59,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:17:59,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704129703] [2024-11-12 13:17:59,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704129703] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:17:59,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:17:59,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-12 13:17:59,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145313042] [2024-11-12 13:17:59,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:17:59,689 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-12 13:17:59,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:17:59,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-12 13:17:59,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-12 13:17:59,690 INFO L87 Difference]: Start difference. First operand 155 states and 188 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-12 13:17:59,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:17:59,841 INFO L93 Difference]: Finished difference Result 162 states and 191 transitions. [2024-11-12 13:17:59,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 13:17:59,842 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2024-11-12 13:17:59,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:17:59,843 INFO L225 Difference]: With dead ends: 162 [2024-11-12 13:17:59,843 INFO L226 Difference]: Without dead ends: 162 [2024-11-12 13:17:59,843 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-12 13:17:59,844 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 68 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-12 13:17:59,844 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 267 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-12 13:17:59,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-11-12 13:17:59,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 152. [2024-11-12 13:17:59,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 104 states have (on average 1.3557692307692308) internal successors, (141), 127 states have internal predecessors, (141), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-11-12 13:17:59,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 177 transitions. [2024-11-12 13:17:59,850 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 177 transitions. Word has length 41 [2024-11-12 13:17:59,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:17:59,851 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 177 transitions. [2024-11-12 13:17:59,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-12 13:17:59,852 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 177 transitions. [2024-11-12 13:17:59,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-12 13:17:59,853 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:17:59,853 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:17:59,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-12 13:17:59,853 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting upsweepErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-12 13:17:59,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:17:59,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1303491776, now seen corresponding path program 1 times [2024-11-12 13:17:59,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:17:59,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668647421] [2024-11-12 13:17:59,854 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:17:59,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:17:59,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:00,079 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-12 13:18:00,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:00,081 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-12 13:18:00,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:00,090 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-12 13:18:00,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:00,093 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-12 13:18:00,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:00,110 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 13:18:00,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:18:00,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668647421] [2024-11-12 13:18:00,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668647421] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:18:00,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055514118] [2024-11-12 13:18:00,111 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:18:00,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:18:00,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:18:00,113 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) [2024-11-12 13:18:00,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-12 13:18:00,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:00,192 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-12 13:18:00,194 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:18:00,416 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 13:18:00,417 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:18:00,561 INFO L378 Elim1Store]: Elim1 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 28 treesize of output 24 [2024-11-12 13:18:00,678 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 13:18:00,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055514118] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:18:00,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:18:00,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 32 [2024-11-12 13:18:00,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714115192] [2024-11-12 13:18:00,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:18:00,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-12 13:18:00,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:18:00,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-12 13:18:00,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2024-11-12 13:18:00,680 INFO L87 Difference]: Start difference. First operand 152 states and 177 transitions. Second operand has 33 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 10 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-12 13:18:01,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:18:01,190 INFO L93 Difference]: Finished difference Result 175 states and 198 transitions. [2024-11-12 13:18:01,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-12 13:18:01,190 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 10 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 42 [2024-11-12 13:18:01,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:18:01,191 INFO L225 Difference]: With dead ends: 175 [2024-11-12 13:18:01,191 INFO L226 Difference]: Without dead ends: 175 [2024-11-12 13:18:01,192 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=298, Invalid=1594, Unknown=0, NotChecked=0, Total=1892 [2024-11-12 13:18:01,192 INFO L435 NwaCegarLoop]: 77 mSDtfsCounter, 86 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-12 13:18:01,193 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 982 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-12 13:18:01,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-11-12 13:18:01,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 147. [2024-11-12 13:18:01,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 102 states have (on average 1.303921568627451) internal successors, (133), 123 states have internal predecessors, (133), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-12 13:18:01,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 167 transitions. [2024-11-12 13:18:01,198 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 167 transitions. Word has length 42 [2024-11-12 13:18:01,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:18:01,198 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 167 transitions. [2024-11-12 13:18:01,199 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 10 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-12 13:18:01,199 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 167 transitions. [2024-11-12 13:18:01,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-12 13:18:01,199 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:18:01,199 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:18:01,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-12 13:18:01,403 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:18:01,404 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-12 13:18:01,404 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:18:01,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1473708635, now seen corresponding path program 1 times [2024-11-12 13:18:01,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:18:01,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858297008] [2024-11-12 13:18:01,404 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:18:01,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:18:01,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:01,516 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-12 13:18:01,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:01,518 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-12 13:18:01,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:01,527 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-12 13:18:01,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:01,529 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-12 13:18:01,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:01,531 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 13:18:01,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:18:01,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858297008] [2024-11-12 13:18:01,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858297008] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:18:01,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228379509] [2024-11-12 13:18:01,532 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:18:01,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:18:01,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:18:01,534 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) [2024-11-12 13:18:01,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-12 13:18:01,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:01,620 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-12 13:18:01,622 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:18:01,700 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 13:18:01,701 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:18:01,796 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 13:18:01,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228379509] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:18:01,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:18:01,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2024-11-12 13:18:01,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709722389] [2024-11-12 13:18:01,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:18:01,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-12 13:18:01,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:18:01,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-12 13:18:01,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2024-11-12 13:18:01,798 INFO L87 Difference]: Start difference. First operand 147 states and 167 transitions. Second operand has 18 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-12 13:18:01,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:18:01,969 INFO L93 Difference]: Finished difference Result 169 states and 191 transitions. [2024-11-12 13:18:01,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-12 13:18:01,970 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2024-11-12 13:18:01,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:18:01,971 INFO L225 Difference]: With dead ends: 169 [2024-11-12 13:18:01,971 INFO L226 Difference]: Without dead ends: 169 [2024-11-12 13:18:01,971 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2024-11-12 13:18:01,972 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 54 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-12 13:18:01,972 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 515 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-12 13:18:01,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-11-12 13:18:01,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 156. [2024-11-12 13:18:01,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 109 states have (on average 1.2844036697247707) internal successors, (140), 131 states have internal predecessors, (140), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2024-11-12 13:18:01,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 176 transitions. [2024-11-12 13:18:01,977 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 176 transitions. Word has length 44 [2024-11-12 13:18:01,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:18:01,978 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 176 transitions. [2024-11-12 13:18:01,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-12 13:18:01,978 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 176 transitions. [2024-11-12 13:18:01,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-12 13:18:01,979 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:18:01,979 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:18:01,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-12 13:18:02,183 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-12 13:18:02,184 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-12 13:18:02,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:18:02,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1510669477, now seen corresponding path program 1 times [2024-11-12 13:18:02,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:18:02,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17306832] [2024-11-12 13:18:02,184 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:18:02,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:18:02,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:02,247 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-12 13:18:02,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:02,249 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-12 13:18:02,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:02,260 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-12 13:18:02,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:02,262 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-12 13:18:02,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:02,264 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-12 13:18:02,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:02,269 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-12 13:18:02,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:18:02,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17306832] [2024-11-12 13:18:02,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17306832] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:18:02,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:18:02,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-12 13:18:02,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406352073] [2024-11-12 13:18:02,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:18:02,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-12 13:18:02,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:18:02,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-12 13:18:02,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-12 13:18:02,271 INFO L87 Difference]: Start difference. First operand 156 states and 176 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-12 13:18:02,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:18:02,409 INFO L93 Difference]: Finished difference Result 161 states and 182 transitions. [2024-11-12 13:18:02,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 13:18:02,410 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2024-11-12 13:18:02,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:18:02,412 INFO L225 Difference]: With dead ends: 161 [2024-11-12 13:18:02,412 INFO L226 Difference]: Without dead ends: 161 [2024-11-12 13:18:02,412 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-12 13:18:02,413 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 66 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-12 13:18:02,413 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 244 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-12 13:18:02,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-11-12 13:18:02,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 151. [2024-11-12 13:18:02,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 109 states have (on average 1.238532110091743) internal successors, (135), 126 states have internal predecessors, (135), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2024-11-12 13:18:02,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 171 transitions. [2024-11-12 13:18:02,418 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 171 transitions. Word has length 50 [2024-11-12 13:18:02,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:18:02,419 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 171 transitions. [2024-11-12 13:18:02,419 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-12 13:18:02,419 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 171 transitions. [2024-11-12 13:18:02,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-12 13:18:02,420 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:18:02,420 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:18:02,420 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-12 13:18:02,421 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-12 13:18:02,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:18:02,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1510669478, now seen corresponding path program 1 times [2024-11-12 13:18:02,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:18:02,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428989743] [2024-11-12 13:18:02,421 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:18:02,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:18:02,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:02,643 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-12 13:18:02,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:02,645 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-12 13:18:02,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:02,657 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-12 13:18:02,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:02,660 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-12 13:18:02,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:02,664 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-12 13:18:02,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:02,751 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 13:18:02,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:18:02,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428989743] [2024-11-12 13:18:02,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428989743] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:18:02,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813957351] [2024-11-12 13:18:02,752 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:18:02,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:18:02,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:18:02,755 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) [2024-11-12 13:18:02,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-12 13:18:02,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:02,854 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-12 13:18:02,856 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:18:03,049 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 13:18:03,050 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:18:03,141 INFO L378 Elim1Store]: Elim1 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 9 treesize of output 7 [2024-11-12 13:18:03,200 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 13:18:03,201 INFO L378 Elim1Store]: Elim1 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 21 treesize of output 25 [2024-11-12 13:18:03,324 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 13:18:03,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813957351] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:18:03,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:18:03,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 32 [2024-11-12 13:18:03,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669396654] [2024-11-12 13:18:03,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:18:03,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-12 13:18:03,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:18:03,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-12 13:18:03,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2024-11-12 13:18:03,326 INFO L87 Difference]: Start difference. First operand 151 states and 171 transitions. Second operand has 33 states, 32 states have (on average 2.40625) internal successors, (77), 29 states have internal predecessors, (77), 13 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-11-12 13:18:04,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:18:04,058 INFO L93 Difference]: Finished difference Result 197 states and 226 transitions. [2024-11-12 13:18:04,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-12 13:18:04,059 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.40625) internal successors, (77), 29 states have internal predecessors, (77), 13 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 50 [2024-11-12 13:18:04,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:18:04,060 INFO L225 Difference]: With dead ends: 197 [2024-11-12 13:18:04,060 INFO L226 Difference]: Without dead ends: 197 [2024-11-12 13:18:04,061 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=238, Invalid=1832, Unknown=0, NotChecked=0, Total=2070 [2024-11-12 13:18:04,061 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 127 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-12 13:18:04,061 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 945 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-12 13:18:04,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-11-12 13:18:04,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 177. [2024-11-12 13:18:04,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 131 states have (on average 1.2290076335877862) internal successors, (161), 146 states have internal predecessors, (161), 22 states have call successors, (22), 9 states have call predecessors, (22), 9 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2024-11-12 13:18:04,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 205 transitions. [2024-11-12 13:18:04,069 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 205 transitions. Word has length 50 [2024-11-12 13:18:04,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:18:04,069 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 205 transitions. [2024-11-12 13:18:04,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.40625) internal successors, (77), 29 states have internal predecessors, (77), 13 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-11-12 13:18:04,070 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 205 transitions. [2024-11-12 13:18:04,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-12 13:18:04,071 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:18:04,071 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:18:04,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-12 13:18:04,274 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-12 13:18:04,275 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting downsweepErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-12 13:18:04,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:18:04,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1687043981, now seen corresponding path program 1 times [2024-11-12 13:18:04,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:18:04,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670503292] [2024-11-12 13:18:04,276 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:18:04,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:18:04,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:04,566 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-12 13:18:04,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:04,568 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-12 13:18:04,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:04,580 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-12 13:18:04,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:04,583 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-12 13:18:04,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:04,586 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-12 13:18:04,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:04,593 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 13:18:04,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:18:04,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670503292] [2024-11-12 13:18:04,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670503292] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:18:04,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463867985] [2024-11-12 13:18:04,594 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:18:04,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:18:04,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:18:04,596 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) [2024-11-12 13:18:04,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-12 13:18:04,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:04,703 INFO L256 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-12 13:18:04,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:18:04,945 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 13:18:04,946 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:18:04,981 INFO L378 Elim1Store]: Elim1 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 29 treesize of output 25 [2024-11-12 13:18:05,513 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 13:18:05,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463867985] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:18:05,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:18:05,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 30 [2024-11-12 13:18:05,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110496332] [2024-11-12 13:18:05,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:18:05,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-12 13:18:05,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:18:05,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-12 13:18:05,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2024-11-12 13:18:05,516 INFO L87 Difference]: Start difference. First operand 177 states and 205 transitions. Second operand has 31 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 27 states have internal predecessors, (86), 10 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-12 13:18:06,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:18:06,183 INFO L93 Difference]: Finished difference Result 236 states and 279 transitions. [2024-11-12 13:18:06,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-12 13:18:06,184 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 27 states have internal predecessors, (86), 10 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 53 [2024-11-12 13:18:06,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:18:06,185 INFO L225 Difference]: With dead ends: 236 [2024-11-12 13:18:06,185 INFO L226 Difference]: Without dead ends: 236 [2024-11-12 13:18:06,186 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 94 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=249, Invalid=1913, Unknown=0, NotChecked=0, Total=2162 [2024-11-12 13:18:06,186 INFO L435 NwaCegarLoop]: 65 mSDtfsCounter, 189 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-12 13:18:06,187 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 860 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-12 13:18:06,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2024-11-12 13:18:06,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 190. [2024-11-12 13:18:06,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 142 states have (on average 1.1971830985915493) internal successors, (170), 156 states have internal predecessors, (170), 24 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2024-11-12 13:18:06,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 218 transitions. [2024-11-12 13:18:06,197 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 218 transitions. Word has length 53 [2024-11-12 13:18:06,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:18:06,197 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 218 transitions. [2024-11-12 13:18:06,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 27 states have internal predecessors, (86), 10 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-12 13:18:06,197 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 218 transitions. [2024-11-12 13:18:06,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-12 13:18:06,198 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:18:06,198 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:18:06,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-12 13:18:06,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-12 13:18:06,398 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-12 13:18:06,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:18:06,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1088870373, now seen corresponding path program 2 times [2024-11-12 13:18:06,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:18:06,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979503879] [2024-11-12 13:18:06,399 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:18:06,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:18:06,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:06,881 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-12 13:18:06,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:06,883 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-12 13:18:06,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:06,899 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-12 13:18:06,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:06,902 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-12 13:18:06,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:06,904 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-12 13:18:06,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:18:06,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979503879] [2024-11-12 13:18:06,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979503879] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:18:06,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176764179] [2024-11-12 13:18:06,905 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 13:18:06,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:18:06,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:18:06,907 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) [2024-11-12 13:18:06,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-12 13:18:07,007 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 13:18:07,008 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:18:07,010 INFO L256 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-12 13:18:07,012 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:18:07,569 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 13:18:07,570 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:18:08,478 INFO L378 Elim1Store]: Elim1 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 161 treesize of output 151 [2024-11-12 13:18:09,212 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-12 13:18:09,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176764179] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:18:09,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:18:09,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 17] total 52 [2024-11-12 13:18:09,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292460726] [2024-11-12 13:18:09,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:18:09,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-12 13:18:09,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:18:09,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-12 13:18:09,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=2489, Unknown=0, NotChecked=0, Total=2756 [2024-11-12 13:18:09,215 INFO L87 Difference]: Start difference. First operand 190 states and 218 transitions. Second operand has 53 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 46 states have internal predecessors, (94), 14 states have call successors, (15), 8 states have call predecessors, (15), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-12 13:18:11,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:18:11,802 INFO L93 Difference]: Finished difference Result 260 states and 297 transitions. [2024-11-12 13:18:11,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-12 13:18:11,803 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 46 states have internal predecessors, (94), 14 states have call successors, (15), 8 states have call predecessors, (15), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 53 [2024-11-12 13:18:11,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:18:11,805 INFO L225 Difference]: With dead ends: 260 [2024-11-12 13:18:11,805 INFO L226 Difference]: Without dead ends: 260 [2024-11-12 13:18:11,807 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2077 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=855, Invalid=7887, Unknown=0, NotChecked=0, Total=8742 [2024-11-12 13:18:11,808 INFO L435 NwaCegarLoop]: 87 mSDtfsCounter, 220 mSDsluCounter, 1607 mSDsCounter, 0 mSdLazyCounter, 2100 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 1694 SdHoareTripleChecker+Invalid, 2221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 2100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-12 13:18:11,808 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 1694 Invalid, 2221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 2100 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-12 13:18:11,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2024-11-12 13:18:11,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 230. [2024-11-12 13:18:11,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 172 states have (on average 1.2034883720930232) internal successors, (207), 187 states have internal predecessors, (207), 31 states have call successors, (31), 13 states have call predecessors, (31), 13 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2024-11-12 13:18:11,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 269 transitions. [2024-11-12 13:18:11,821 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 269 transitions. Word has length 53 [2024-11-12 13:18:11,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:18:11,821 INFO L471 AbstractCegarLoop]: Abstraction has 230 states and 269 transitions. [2024-11-12 13:18:11,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 46 states have internal predecessors, (94), 14 states have call successors, (15), 8 states have call predecessors, (15), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-12 13:18:11,821 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 269 transitions. [2024-11-12 13:18:11,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-12 13:18:11,822 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:18:11,822 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:18:11,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-12 13:18:12,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-12 13:18:12,022 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting upsweepErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-12 13:18:12,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:18:12,023 INFO L85 PathProgramCache]: Analyzing trace with hash -604756816, now seen corresponding path program 1 times [2024-11-12 13:18:12,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:18:12,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888488178] [2024-11-12 13:18:12,023 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:18:12,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:18:12,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:12,480 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-12 13:18:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:12,483 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-12 13:18:12,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:12,496 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-12 13:18:12,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:12,500 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-12 13:18:12,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:12,502 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-12 13:18:12,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:18:12,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888488178] [2024-11-12 13:18:12,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888488178] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:18:12,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396033723] [2024-11-12 13:18:12,503 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:18:12,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:18:12,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:18:12,505 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:18:12,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-12 13:18:12,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:12,608 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-12 13:18:12,610 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:18:13,045 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 13:18:13,045 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:18:13,405 INFO L378 Elim1Store]: Elim1 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 79 treesize of output 73 [2024-11-12 13:18:13,843 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-12 13:18:13,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396033723] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:18:13,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:18:13,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 15] total 48 [2024-11-12 13:18:13,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232160144] [2024-11-12 13:18:13,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:18:13,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-12 13:18:13,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:18:13,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-12 13:18:13,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2101, Unknown=0, NotChecked=0, Total=2352 [2024-11-12 13:18:13,845 INFO L87 Difference]: Start difference. First operand 230 states and 269 transitions. Second operand has 49 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 42 states have internal predecessors, (97), 14 states have call successors, (15), 8 states have call predecessors, (15), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-12 13:18:16,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:18:16,634 INFO L93 Difference]: Finished difference Result 316 states and 363 transitions. [2024-11-12 13:18:16,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-11-12 13:18:16,635 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 42 states have internal predecessors, (97), 14 states have call successors, (15), 8 states have call predecessors, (15), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 54 [2024-11-12 13:18:16,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:18:16,636 INFO L225 Difference]: With dead ends: 316 [2024-11-12 13:18:16,636 INFO L226 Difference]: Without dead ends: 316 [2024-11-12 13:18:16,640 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3748 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1149, Invalid=11283, Unknown=0, NotChecked=0, Total=12432 [2024-11-12 13:18:16,641 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 327 mSDsluCounter, 1385 mSDsCounter, 0 mSdLazyCounter, 2049 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 1464 SdHoareTripleChecker+Invalid, 2202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 2049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-12 13:18:16,641 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 1464 Invalid, 2202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 2049 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-12 13:18:16,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2024-11-12 13:18:16,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 274. [2024-11-12 13:18:16,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 204 states have (on average 1.196078431372549) internal successors, (244), 219 states have internal predecessors, (244), 39 states have call successors, (39), 17 states have call predecessors, (39), 17 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2024-11-12 13:18:16,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 322 transitions. [2024-11-12 13:18:16,657 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 322 transitions. Word has length 54 [2024-11-12 13:18:16,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:18:16,657 INFO L471 AbstractCegarLoop]: Abstraction has 274 states and 322 transitions. [2024-11-12 13:18:16,657 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 42 states have internal predecessors, (97), 14 states have call successors, (15), 8 states have call predecessors, (15), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-12 13:18:16,658 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 322 transitions. [2024-11-12 13:18:16,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-12 13:18:16,660 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:18:16,660 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:18:16,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-12 13:18:16,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:18:16,861 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-12 13:18:16,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:18:16,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1351860277, now seen corresponding path program 3 times [2024-11-12 13:18:16,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:18:16,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125988895] [2024-11-12 13:18:16,862 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:18:16,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:18:16,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:17,090 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-12 13:18:17,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:17,092 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-12 13:18:17,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:17,103 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-12 13:18:17,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:17,105 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-12 13:18:17,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:17,107 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-12 13:18:17,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:18:17,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125988895] [2024-11-12 13:18:17,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125988895] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:18:17,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209160034] [2024-11-12 13:18:17,107 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 13:18:17,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:18:17,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:18:17,110 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:18:17,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-12 13:18:17,216 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-12 13:18:17,216 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:18:17,218 INFO L256 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-12 13:18:17,221 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:18:19,132 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-12 13:18:19,133 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:18:19,788 INFO L378 Elim1Store]: Elim1 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 75 treesize of output 71 [2024-11-12 13:18:20,193 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-12 13:18:20,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209160034] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:18:20,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:18:20,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 17] total 47 [2024-11-12 13:18:20,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566098792] [2024-11-12 13:18:20,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:18:20,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-12 13:18:20,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:18:20,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-12 13:18:20,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1954, Unknown=0, NotChecked=0, Total=2162 [2024-11-12 13:18:20,197 INFO L87 Difference]: Start difference. First operand 274 states and 322 transitions. Second operand has 47 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 38 states have internal predecessors, (90), 16 states have call successors, (19), 11 states have call predecessors, (19), 1 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-12 13:18:25,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:18:25,411 INFO L93 Difference]: Finished difference Result 382 states and 436 transitions. [2024-11-12 13:18:25,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2024-11-12 13:18:25,412 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 38 states have internal predecessors, (90), 16 states have call successors, (19), 11 states have call predecessors, (19), 1 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 56 [2024-11-12 13:18:25,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:18:25,413 INFO L225 Difference]: With dead ends: 382 [2024-11-12 13:18:25,413 INFO L226 Difference]: Without dead ends: 382 [2024-11-12 13:18:25,418 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3279 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1444, Invalid=10988, Unknown=0, NotChecked=0, Total=12432 [2024-11-12 13:18:25,419 INFO L435 NwaCegarLoop]: 77 mSDtfsCounter, 343 mSDsluCounter, 1242 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 1319 SdHoareTripleChecker+Invalid, 1513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-12 13:18:25,419 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 1319 Invalid, 1513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1357 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-12 13:18:25,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2024-11-12 13:18:25,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 331. [2024-11-12 13:18:25,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 247 states have (on average 1.1700404858299596) internal successors, (289), 262 states have internal predecessors, (289), 47 states have call successors, (47), 23 states have call predecessors, (47), 23 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2024-11-12 13:18:25,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 383 transitions. [2024-11-12 13:18:25,434 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 383 transitions. Word has length 56 [2024-11-12 13:18:25,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:18:25,435 INFO L471 AbstractCegarLoop]: Abstraction has 331 states and 383 transitions. [2024-11-12 13:18:25,435 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 38 states have internal predecessors, (90), 16 states have call successors, (19), 11 states have call predecessors, (19), 1 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-12 13:18:25,435 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 383 transitions. [2024-11-12 13:18:25,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-12 13:18:25,436 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:18:25,436 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:18:25,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-12 13:18:25,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2024-11-12 13:18:25,641 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-12 13:18:25,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:18:25,641 INFO L85 PathProgramCache]: Analyzing trace with hash -453742993, now seen corresponding path program 1 times [2024-11-12 13:18:25,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:18:25,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483991456] [2024-11-12 13:18:25,641 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:18:25,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:18:25,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:25,806 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-12 13:18:25,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:25,809 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-12 13:18:25,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:25,818 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-12 13:18:25,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:25,821 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-12 13:18:25,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:25,824 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-12 13:18:25,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:25,830 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 13:18:25,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:18:25,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483991456] [2024-11-12 13:18:25,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483991456] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:18:25,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743269588] [2024-11-12 13:18:25,831 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:18:25,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:18:25,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:18:25,833 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:18:25,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-12 13:18:25,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:25,939 INFO L256 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-12 13:18:25,940 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:18:26,068 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 13:18:26,068 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:18:26,206 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 13:18:26,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743269588] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:18:26,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:18:26,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2024-11-12 13:18:26,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350917533] [2024-11-12 13:18:26,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:18:26,207 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-12 13:18:26,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:18:26,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-12 13:18:26,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2024-11-12 13:18:26,208 INFO L87 Difference]: Start difference. First operand 331 states and 383 transitions. Second operand has 30 states, 30 states have (on average 2.966666666666667) internal successors, (89), 26 states have internal predecessors, (89), 11 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-11-12 13:18:26,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:18:26,451 INFO L93 Difference]: Finished difference Result 386 states and 443 transitions. [2024-11-12 13:18:26,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-12 13:18:26,453 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.966666666666667) internal successors, (89), 26 states have internal predecessors, (89), 11 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 60 [2024-11-12 13:18:26,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:18:26,455 INFO L225 Difference]: With dead ends: 386 [2024-11-12 13:18:26,455 INFO L226 Difference]: Without dead ends: 386 [2024-11-12 13:18:26,456 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=959, Unknown=0, NotChecked=0, Total=1122 [2024-11-12 13:18:26,457 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 84 mSDsluCounter, 922 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-12 13:18:26,457 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 992 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-12 13:18:26,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2024-11-12 13:18:26,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 344. [2024-11-12 13:18:26,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 258 states have (on average 1.1627906976744187) internal successors, (300), 273 states have internal predecessors, (300), 48 states have call successors, (48), 24 states have call predecessors, (48), 24 states have return successors, (48), 46 states have call predecessors, (48), 48 states have call successors, (48) [2024-11-12 13:18:26,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 396 transitions. [2024-11-12 13:18:26,468 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 396 transitions. Word has length 60 [2024-11-12 13:18:26,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:18:26,468 INFO L471 AbstractCegarLoop]: Abstraction has 344 states and 396 transitions. [2024-11-12 13:18:26,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.966666666666667) internal successors, (89), 26 states have internal predecessors, (89), 11 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-11-12 13:18:26,469 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 396 transitions. [2024-11-12 13:18:26,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-12 13:18:26,470 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:18:26,470 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:18:26,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-12 13:18:26,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:18:26,671 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-12 13:18:26,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:18:26,671 INFO L85 PathProgramCache]: Analyzing trace with hash 2073437478, now seen corresponding path program 1 times [2024-11-12 13:18:26,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:18:26,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604739627] [2024-11-12 13:18:26,671 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:18:26,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:18:26,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:26,738 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-12 13:18:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:26,740 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-12 13:18:26,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:26,745 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-12 13:18:26,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:26,747 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-12 13:18:26,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:26,751 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-12 13:18:26,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:26,757 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-12 13:18:26,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:26,764 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-12 13:18:26,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:18:26,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604739627] [2024-11-12 13:18:26,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604739627] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:18:26,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:18:26,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 13:18:26,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195090717] [2024-11-12 13:18:26,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:18:26,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 13:18:26,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:18:26,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 13:18:26,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-12 13:18:26,767 INFO L87 Difference]: Start difference. First operand 344 states and 396 transitions. Second operand has 5 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-12 13:18:26,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:18:26,833 INFO L93 Difference]: Finished difference Result 384 states and 441 transitions. [2024-11-12 13:18:26,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 13:18:26,834 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 62 [2024-11-12 13:18:26,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:18:26,835 INFO L225 Difference]: With dead ends: 384 [2024-11-12 13:18:26,835 INFO L226 Difference]: Without dead ends: 384 [2024-11-12 13:18:26,835 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-12 13:18:26,836 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 47 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-12 13:18:26,836 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 214 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-12 13:18:26,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2024-11-12 13:18:26,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 343. [2024-11-12 13:18:26,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 258 states have (on average 1.1589147286821706) internal successors, (299), 272 states have internal predecessors, (299), 48 states have call successors, (48), 24 states have call predecessors, (48), 24 states have return successors, (48), 46 states have call predecessors, (48), 48 states have call successors, (48) [2024-11-12 13:18:26,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 395 transitions. [2024-11-12 13:18:26,845 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 395 transitions. Word has length 62 [2024-11-12 13:18:26,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:18:26,845 INFO L471 AbstractCegarLoop]: Abstraction has 343 states and 395 transitions. [2024-11-12 13:18:26,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-12 13:18:26,846 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 395 transitions. [2024-11-12 13:18:26,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-12 13:18:26,846 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:18:26,846 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:18:26,846 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-12 13:18:26,847 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-12 13:18:26,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:18:26,847 INFO L85 PathProgramCache]: Analyzing trace with hash 2073437479, now seen corresponding path program 1 times [2024-11-12 13:18:26,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:18:26,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183225024] [2024-11-12 13:18:26,848 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:18:26,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:18:26,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:27,093 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-12 13:18:27,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:27,095 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-12 13:18:27,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:27,104 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-12 13:18:27,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:27,107 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-12 13:18:27,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:27,109 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-12 13:18:27,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:27,201 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-12 13:18:27,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:27,218 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 13:18:27,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:18:27,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183225024] [2024-11-12 13:18:27,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183225024] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:18:27,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448864417] [2024-11-12 13:18:27,221 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:18:27,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:18:27,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:18:27,223 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:18:27,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-12 13:18:27,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:27,345 INFO L256 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-12 13:18:27,347 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:18:27,516 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 13:18:27,516 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:18:27,590 INFO L378 Elim1Store]: Elim1 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 21 treesize of output 17 [2024-11-12 13:18:27,665 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 13:18:27,666 INFO L378 Elim1Store]: Elim1 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 18 treesize of output 22 [2024-11-12 13:18:27,783 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 13:18:27,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448864417] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:18:27,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:18:27,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 28 [2024-11-12 13:18:27,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537997867] [2024-11-12 13:18:27,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:18:27,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-12 13:18:27,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:18:27,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-12 13:18:27,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2024-11-12 13:18:27,785 INFO L87 Difference]: Start difference. First operand 343 states and 395 transitions. Second operand has 29 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 26 states have internal predecessors, (103), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-12 13:18:28,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:18:28,453 INFO L93 Difference]: Finished difference Result 405 states and 470 transitions. [2024-11-12 13:18:28,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-12 13:18:28,454 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 26 states have internal predecessors, (103), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) Word has length 62 [2024-11-12 13:18:28,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:18:28,455 INFO L225 Difference]: With dead ends: 405 [2024-11-12 13:18:28,455 INFO L226 Difference]: Without dead ends: 405 [2024-11-12 13:18:28,456 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=241, Invalid=1921, Unknown=0, NotChecked=0, Total=2162 [2024-11-12 13:18:28,456 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 226 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-12 13:18:28,456 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 635 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-12 13:18:28,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2024-11-12 13:18:28,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 353. [2024-11-12 13:18:28,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 268 states have (on average 1.171641791044776) internal successors, (314), 282 states have internal predecessors, (314), 48 states have call successors, (48), 24 states have call predecessors, (48), 24 states have return successors, (48), 46 states have call predecessors, (48), 48 states have call successors, (48) [2024-11-12 13:18:28,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 410 transitions. [2024-11-12 13:18:28,465 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 410 transitions. Word has length 62 [2024-11-12 13:18:28,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:18:28,465 INFO L471 AbstractCegarLoop]: Abstraction has 353 states and 410 transitions. [2024-11-12 13:18:28,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 26 states have internal predecessors, (103), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-12 13:18:28,466 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 410 transitions. [2024-11-12 13:18:28,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-12 13:18:28,466 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:18:28,466 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:18:28,485 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-12 13:18:28,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:18:28,671 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-12 13:18:28,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:18:28,671 INFO L85 PathProgramCache]: Analyzing trace with hash -291441920, now seen corresponding path program 1 times [2024-11-12 13:18:28,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:18:28,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462187893] [2024-11-12 13:18:28,671 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:18:28,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:18:28,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:28,759 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-12 13:18:28,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:28,761 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-12 13:18:28,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:28,768 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-12 13:18:28,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:28,770 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-12 13:18:28,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:28,771 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-12 13:18:28,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:28,777 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-12 13:18:28,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:28,783 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-12 13:18:28,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:18:28,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462187893] [2024-11-12 13:18:28,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462187893] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:18:28,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137457301] [2024-11-12 13:18:28,784 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:18:28,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:18:28,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:18:28,786 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:18:28,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-12 13:18:28,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:28,893 INFO L256 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-12 13:18:28,894 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:18:28,940 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 13:18:28,940 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:18:29,002 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 13:18:29,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137457301] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:18:29,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:18:29,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2024-11-12 13:18:29,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918159481] [2024-11-12 13:18:29,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:18:29,003 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-12 13:18:29,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:18:29,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-12 13:18:29,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-11-12 13:18:29,004 INFO L87 Difference]: Start difference. First operand 353 states and 410 transitions. Second operand has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 12 states have internal predecessors, (71), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-12 13:18:29,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:18:29,121 INFO L93 Difference]: Finished difference Result 397 states and 455 transitions. [2024-11-12 13:18:29,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-12 13:18:29,121 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 12 states have internal predecessors, (71), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 64 [2024-11-12 13:18:29,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:18:29,123 INFO L225 Difference]: With dead ends: 397 [2024-11-12 13:18:29,123 INFO L226 Difference]: Without dead ends: 397 [2024-11-12 13:18:29,123 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-11-12 13:18:29,124 INFO L435 NwaCegarLoop]: 69 mSDtfsCounter, 50 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-12 13:18:29,124 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 499 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-12 13:18:29,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2024-11-12 13:18:29,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 353. [2024-11-12 13:18:29,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 268 states have (on average 1.164179104477612) internal successors, (312), 282 states have internal predecessors, (312), 48 states have call successors, (48), 24 states have call predecessors, (48), 24 states have return successors, (48), 46 states have call predecessors, (48), 48 states have call successors, (48) [2024-11-12 13:18:29,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 408 transitions. [2024-11-12 13:18:29,132 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 408 transitions. Word has length 64 [2024-11-12 13:18:29,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:18:29,133 INFO L471 AbstractCegarLoop]: Abstraction has 353 states and 408 transitions. [2024-11-12 13:18:29,133 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 12 states have internal predecessors, (71), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-12 13:18:29,133 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 408 transitions. [2024-11-12 13:18:29,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-12 13:18:29,134 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:18:29,134 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:18:29,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-12 13:18:29,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-12 13:18:29,335 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-12 13:18:29,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:18:29,335 INFO L85 PathProgramCache]: Analyzing trace with hash -443655501, now seen corresponding path program 1 times [2024-11-12 13:18:29,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:18:29,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940117227] [2024-11-12 13:18:29,335 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:18:29,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:18:29,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:30,489 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-12 13:18:30,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:30,491 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-12 13:18:30,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:30,502 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-12 13:18:30,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:30,541 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-12 13:18:30,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:30,568 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-12 13:18:30,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:30,773 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-12 13:18:30,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:31,666 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:18:31,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:18:31,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940117227] [2024-11-12 13:18:31,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940117227] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:18:31,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586178514] [2024-11-12 13:18:31,666 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:18:31,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:18:31,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:18:31,668 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:18:31,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-12 13:18:31,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:31,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-12 13:18:31,788 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:18:32,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-12 13:18:32,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-11-12 13:18:32,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-12 13:18:32,345 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-12 13:18:32,345 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:18:32,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2024-11-12 13:18:32,510 INFO L378 Elim1Store]: Elim1 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 27 treesize of output 25 [2024-11-12 13:18:32,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2024-11-12 13:18:33,131 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 13:18:33,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586178514] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:18:33,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:18:33,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 19, 17] total 56 [2024-11-12 13:18:33,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629682568] [2024-11-12 13:18:33,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:18:33,132 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-12 13:18:33,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:18:33,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-12 13:18:33,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2857, Unknown=0, NotChecked=0, Total=3080 [2024-11-12 13:18:33,134 INFO L87 Difference]: Start difference. First operand 353 states and 408 transitions. Second operand has 56 states, 52 states have (on average 2.2884615384615383) internal successors, (119), 49 states have internal predecessors, (119), 10 states have call successors, (15), 3 states have call predecessors, (15), 7 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) [2024-11-12 13:18:35,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:18:35,181 INFO L93 Difference]: Finished difference Result 492 states and 601 transitions. [2024-11-12 13:18:35,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-12 13:18:35,182 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 52 states have (on average 2.2884615384615383) internal successors, (119), 49 states have internal predecessors, (119), 10 states have call successors, (15), 3 states have call predecessors, (15), 7 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) Word has length 65 [2024-11-12 13:18:35,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:18:35,184 INFO L225 Difference]: With dead ends: 492 [2024-11-12 13:18:35,184 INFO L226 Difference]: Without dead ends: 492 [2024-11-12 13:18:35,186 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1673 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=548, Invalid=6424, Unknown=0, NotChecked=0, Total=6972 [2024-11-12 13:18:35,186 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 130 mSDsluCounter, 1132 mSDsCounter, 0 mSdLazyCounter, 1961 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 1179 SdHoareTripleChecker+Invalid, 2036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-12 13:18:35,186 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 1179 Invalid, 2036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1961 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-12 13:18:35,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2024-11-12 13:18:35,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 368. [2024-11-12 13:18:35,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 280 states have (on average 1.1571428571428573) internal successors, (324), 295 states have internal predecessors, (324), 49 states have call successors, (49), 24 states have call predecessors, (49), 26 states have return successors, (52), 48 states have call predecessors, (52), 49 states have call successors, (52) [2024-11-12 13:18:35,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 425 transitions. [2024-11-12 13:18:35,206 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 425 transitions. Word has length 65 [2024-11-12 13:18:35,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:18:35,207 INFO L471 AbstractCegarLoop]: Abstraction has 368 states and 425 transitions. [2024-11-12 13:18:35,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 52 states have (on average 2.2884615384615383) internal successors, (119), 49 states have internal predecessors, (119), 10 states have call successors, (15), 3 states have call predecessors, (15), 7 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) [2024-11-12 13:18:35,207 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 425 transitions. [2024-11-12 13:18:35,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-12 13:18:35,210 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:18:35,210 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:18:35,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-12 13:18:35,410 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:18:35,411 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-12 13:18:35,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:18:35,412 INFO L85 PathProgramCache]: Analyzing trace with hash -820840534, now seen corresponding path program 4 times [2024-11-12 13:18:35,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:18:35,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199620209] [2024-11-12 13:18:35,412 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:18:35,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:18:35,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:35,692 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-12 13:18:35,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:35,694 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-12 13:18:35,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:35,705 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-12 13:18:35,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:35,709 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-12 13:18:35,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:35,711 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 22 proven. 45 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-12 13:18:35,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:18:35,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199620209] [2024-11-12 13:18:35,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199620209] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:18:35,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906323255] [2024-11-12 13:18:35,712 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-12 13:18:35,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:18:35,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:18:35,714 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:18:35,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-12 13:18:35,846 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-12 13:18:35,846 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:18:35,847 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-12 13:18:35,848 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:18:36,089 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 20 proven. 47 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-12 13:18:36,089 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:18:36,294 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 22 proven. 45 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-12 13:18:36,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906323255] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:18:36,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:18:36,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2024-11-12 13:18:36,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298773647] [2024-11-12 13:18:36,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:18:36,294 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-12 13:18:36,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:18:36,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-12 13:18:36,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2024-11-12 13:18:36,296 INFO L87 Difference]: Start difference. First operand 368 states and 425 transitions. Second operand has 31 states, 25 states have (on average 2.96) internal successors, (74), 26 states have internal predecessors, (74), 8 states have call successors, (13), 7 states have call predecessors, (13), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-12 13:18:36,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:18:36,983 INFO L93 Difference]: Finished difference Result 490 states and 567 transitions. [2024-11-12 13:18:36,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-12 13:18:36,983 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 25 states have (on average 2.96) internal successors, (74), 26 states have internal predecessors, (74), 8 states have call successors, (13), 7 states have call predecessors, (13), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 69 [2024-11-12 13:18:36,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:18:36,985 INFO L225 Difference]: With dead ends: 490 [2024-11-12 13:18:36,986 INFO L226 Difference]: Without dead ends: 490 [2024-11-12 13:18:36,986 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 121 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=302, Invalid=1954, Unknown=0, NotChecked=0, Total=2256 [2024-11-12 13:18:36,987 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 77 mSDsluCounter, 1065 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 1145 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-12 13:18:36,988 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 1145 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1149 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-12 13:18:36,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2024-11-12 13:18:36,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 410. [2024-11-12 13:18:36,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 315 states have (on average 1.1492063492063491) internal successors, (362), 332 states have internal predecessors, (362), 52 states have call successors, (52), 27 states have call predecessors, (52), 30 states have return successors, (56), 50 states have call predecessors, (56), 52 states have call successors, (56) [2024-11-12 13:18:36,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 470 transitions. [2024-11-12 13:18:36,998 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 470 transitions. Word has length 69 [2024-11-12 13:18:36,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:18:36,999 INFO L471 AbstractCegarLoop]: Abstraction has 410 states and 470 transitions. [2024-11-12 13:18:36,999 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 25 states have (on average 2.96) internal successors, (74), 26 states have internal predecessors, (74), 8 states have call successors, (13), 7 states have call predecessors, (13), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-12 13:18:36,999 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 470 transitions. [2024-11-12 13:18:37,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-12 13:18:37,001 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:18:37,001 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:18:37,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-12 13:18:37,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:18:37,202 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-12 13:18:37,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:18:37,202 INFO L85 PathProgramCache]: Analyzing trace with hash -868412528, now seen corresponding path program 1 times [2024-11-12 13:18:37,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:18:37,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615838846] [2024-11-12 13:18:37,202 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:18:37,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:18:37,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:37,298 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-12 13:18:37,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:37,300 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-12 13:18:37,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:37,307 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-12 13:18:37,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:37,310 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-12 13:18:37,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:37,312 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-12 13:18:37,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:37,319 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-12 13:18:37,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:37,326 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-12 13:18:37,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:18:37,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615838846] [2024-11-12 13:18:37,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615838846] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:18:37,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:18:37,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-12 13:18:37,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216552688] [2024-11-12 13:18:37,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:18:37,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-12 13:18:37,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:18:37,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-12 13:18:37,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-12 13:18:37,329 INFO L87 Difference]: Start difference. First operand 410 states and 470 transitions. Second operand has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-12 13:18:37,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:18:37,435 INFO L93 Difference]: Finished difference Result 447 states and 511 transitions. [2024-11-12 13:18:37,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 13:18:37,436 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 66 [2024-11-12 13:18:37,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:18:37,437 INFO L225 Difference]: With dead ends: 447 [2024-11-12 13:18:37,438 INFO L226 Difference]: Without dead ends: 447 [2024-11-12 13:18:37,438 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-12 13:18:37,438 INFO L435 NwaCegarLoop]: 72 mSDtfsCounter, 42 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-12 13:18:37,438 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 261 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-12 13:18:37,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2024-11-12 13:18:37,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 409. [2024-11-12 13:18:37,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 315 states have (on average 1.1428571428571428) internal successors, (360), 331 states have internal predecessors, (360), 52 states have call successors, (52), 27 states have call predecessors, (52), 30 states have return successors, (56), 50 states have call predecessors, (56), 52 states have call successors, (56) [2024-11-12 13:18:37,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 468 transitions. [2024-11-12 13:18:37,449 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 468 transitions. Word has length 66 [2024-11-12 13:18:37,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:18:37,449 INFO L471 AbstractCegarLoop]: Abstraction has 409 states and 468 transitions. [2024-11-12 13:18:37,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-12 13:18:37,450 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 468 transitions. [2024-11-12 13:18:37,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-12 13:18:37,451 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:18:37,451 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:18:37,452 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-11-12 13:18:37,452 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-12 13:18:37,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:18:37,453 INFO L85 PathProgramCache]: Analyzing trace with hash -868412527, now seen corresponding path program 1 times [2024-11-12 13:18:37,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:18:37,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231603854] [2024-11-12 13:18:37,453 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:18:37,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:18:37,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:37,663 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-12 13:18:37,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:37,665 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-12 13:18:37,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:37,673 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-12 13:18:37,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:37,675 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-12 13:18:37,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:37,677 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-12 13:18:37,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:37,682 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-12 13:18:37,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:37,690 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 13:18:37,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:18:37,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231603854] [2024-11-12 13:18:37,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231603854] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:18:37,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5270775] [2024-11-12 13:18:37,691 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:18:37,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:18:37,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:18:37,693 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:18:37,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-12 13:18:37,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:37,825 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-12 13:18:37,827 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:18:38,027 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 13:18:38,027 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:18:38,103 INFO L378 Elim1Store]: Elim1 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 22 treesize of output 18 [2024-11-12 13:18:38,147 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 13:18:38,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5270775] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:18:38,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:18:38,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2024-11-12 13:18:38,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033697183] [2024-11-12 13:18:38,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:18:38,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-12 13:18:38,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:18:38,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-12 13:18:38,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-12 13:18:38,149 INFO L87 Difference]: Start difference. First operand 409 states and 468 transitions. Second operand has 17 states, 16 states have (on average 6.5) internal successors, (104), 16 states have internal predecessors, (104), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-12 13:18:38,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:18:38,387 INFO L93 Difference]: Finished difference Result 454 states and 516 transitions. [2024-11-12 13:18:38,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-12 13:18:38,388 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 6.5) internal successors, (104), 16 states have internal predecessors, (104), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 66 [2024-11-12 13:18:38,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:18:38,390 INFO L225 Difference]: With dead ends: 454 [2024-11-12 13:18:38,390 INFO L226 Difference]: Without dead ends: 454 [2024-11-12 13:18:38,390 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 130 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2024-11-12 13:18:38,390 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 138 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-12 13:18:38,390 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 365 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-12 13:18:38,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2024-11-12 13:18:38,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 412. [2024-11-12 13:18:38,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 319 states have (on average 1.1379310344827587) internal successors, (363), 334 states have internal predecessors, (363), 52 states have call successors, (52), 27 states have call predecessors, (52), 30 states have return successors, (56), 50 states have call predecessors, (56), 52 states have call successors, (56) [2024-11-12 13:18:38,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 471 transitions. [2024-11-12 13:18:38,403 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 471 transitions. Word has length 66 [2024-11-12 13:18:38,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:18:38,403 INFO L471 AbstractCegarLoop]: Abstraction has 412 states and 471 transitions. [2024-11-12 13:18:38,403 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 6.5) internal successors, (104), 16 states have internal predecessors, (104), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-12 13:18:38,403 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 471 transitions. [2024-11-12 13:18:38,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-12 13:18:38,404 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:18:38,405 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:18:38,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-12 13:18:38,605 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:18:38,606 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-12 13:18:38,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:18:38,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1121437506, now seen corresponding path program 2 times [2024-11-12 13:18:38,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:18:38,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402440616] [2024-11-12 13:18:38,606 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:18:38,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:18:38,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:38,741 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-12 13:18:38,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:38,743 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-12 13:18:38,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:38,749 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-12 13:18:38,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:38,751 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-12 13:18:38,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:38,753 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-11-12 13:18:38,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:38,829 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-12 13:18:38,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:18:38,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402440616] [2024-11-12 13:18:38,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402440616] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:18:38,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593292069] [2024-11-12 13:18:38,830 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 13:18:38,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:18:38,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:18:38,832 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:18:38,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-12 13:18:38,985 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 13:18:38,985 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:18:38,990 INFO L256 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-12 13:18:38,992 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:18:39,060 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-12 13:18:39,060 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:18:39,301 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-12 13:18:39,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593292069] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:18:39,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:18:39,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 20 [2024-11-12 13:18:39,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872031063] [2024-11-12 13:18:39,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:18:39,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-12 13:18:39,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:18:39,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-12 13:18:39,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2024-11-12 13:18:39,304 INFO L87 Difference]: Start difference. First operand 412 states and 471 transitions. Second operand has 20 states, 20 states have (on average 4.3) internal successors, (86), 19 states have internal predecessors, (86), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-12 13:18:39,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:18:39,539 INFO L93 Difference]: Finished difference Result 487 states and 563 transitions. [2024-11-12 13:18:39,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-12 13:18:39,540 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.3) internal successors, (86), 19 states have internal predecessors, (86), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 73 [2024-11-12 13:18:39,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:18:39,542 INFO L225 Difference]: With dead ends: 487 [2024-11-12 13:18:39,542 INFO L226 Difference]: Without dead ends: 475 [2024-11-12 13:18:39,543 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 144 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2024-11-12 13:18:39,544 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 29 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-12 13:18:39,544 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 469 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-12 13:18:39,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2024-11-12 13:18:39,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 368. [2024-11-12 13:18:39,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 285 states have (on average 1.1473684210526316) internal successors, (327), 296 states have internal predecessors, (327), 48 states have call successors, (48), 24 states have call predecessors, (48), 24 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2024-11-12 13:18:39,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 423 transitions. [2024-11-12 13:18:39,556 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 423 transitions. Word has length 73 [2024-11-12 13:18:39,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:18:39,556 INFO L471 AbstractCegarLoop]: Abstraction has 368 states and 423 transitions. [2024-11-12 13:18:39,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.3) internal successors, (86), 19 states have internal predecessors, (86), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-12 13:18:39,557 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 423 transitions. [2024-11-12 13:18:39,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-12 13:18:39,557 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:18:39,557 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:18:39,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-12 13:18:39,761 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-12 13:18:39,762 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-12 13:18:39,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:18:39,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1050620410, now seen corresponding path program 1 times [2024-11-12 13:18:39,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:18:39,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596025466] [2024-11-12 13:18:39,762 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:18:39,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:18:39,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:41,325 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-12 13:18:41,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:41,327 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-12 13:18:41,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:41,346 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-12 13:18:41,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:41,372 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-12 13:18:41,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:41,401 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-12 13:18:41,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:41,535 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-12 13:18:41,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:42,434 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:18:42,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:18:42,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596025466] [2024-11-12 13:18:42,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596025466] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:18:42,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331714113] [2024-11-12 13:18:42,434 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:18:42,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:18:42,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:18:42,435 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:18:42,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-12 13:18:42,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:42,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 110 conjuncts are in the unsatisfiable core [2024-11-12 13:18:42,569 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:18:42,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-12 13:18:42,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2024-11-12 13:18:42,717 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2024-11-12 13:18:42,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2024-11-12 13:18:42,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2024-11-12 13:18:42,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-11-12 13:18:42,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 10 [2024-11-12 13:18:42,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2024-11-12 13:18:42,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 14 [2024-11-12 13:18:43,145 WARN L873 $PredicateComparison]: unable to prove that (exists ((v_upsweep_~right_54 Int) (v_upsweep_~a.offset_56 Int)) (and (<= |c_upsweep_#in~right| v_upsweep_~right_54) (<= |c_upsweep_#in~a.offset| v_upsweep_~a.offset_56) (= |c_#memory_int#1| (store |c_old(#memory_int#1)| |c_upsweep_#in~a.base| (let ((.cse0 (+ v_upsweep_~a.offset_56 (* v_upsweep_~right_54 4)))) (store (select |c_old(#memory_int#1)| |c_upsweep_#in~a.base|) .cse0 (select (select |c_#memory_int#1| |c_upsweep_#in~a.base|) .cse0))))))) is different from true [2024-11-12 13:18:43,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2024-11-12 13:18:43,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2024-11-12 13:18:43,578 WARN L873 $PredicateComparison]: unable to prove that (exists ((downsweep_~left Int)) (and (<= downsweep_~left |c_downsweep_#in~left|) (= |c_#memory_int#1| (store |c_old(#memory_int#1)| |c_downsweep_#in~a.base| (let ((.cse2 (+ |c_downsweep_#in~a.offset| (* downsweep_~left 4)))) (store (let ((.cse1 (+ |c_downsweep_#in~a.offset| (* |c_downsweep_#in~right| 4))) (.cse0 (select |c_old(#memory_int#1)| |c_downsweep_#in~a.base|))) (store .cse0 .cse1 (+ (select .cse0 .cse1) (select .cse0 .cse2)))) .cse2 (select (select |c_#memory_int#1| |c_downsweep_#in~a.base|) .cse2))))))) is different from true [2024-11-12 13:18:43,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 90 [2024-11-12 13:18:44,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 125 [2024-11-12 13:18:44,524 INFO L378 Elim1Store]: Elim1 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 10 [2024-11-12 13:18:44,682 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-12 13:18:44,683 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:18:49,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331714113] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:18:49,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-12 13:18:49,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 32] total 61 [2024-11-12 13:18:49,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269872970] [2024-11-12 13:18:49,250 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-12 13:18:49,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-11-12 13:18:49,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:18:49,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-11-12 13:18:49,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=4029, Unknown=3, NotChecked=258, Total=4556 [2024-11-12 13:18:49,252 INFO L87 Difference]: Start difference. First operand 368 states and 423 transitions. Second operand has 61 states, 56 states have (on average 1.8392857142857142) internal successors, (103), 53 states have internal predecessors, (103), 8 states have call successors, (10), 3 states have call predecessors, (10), 8 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2024-11-12 13:18:53,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:18:53,211 INFO L93 Difference]: Finished difference Result 475 states and 555 transitions. [2024-11-12 13:18:53,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-12 13:18:53,212 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 56 states have (on average 1.8392857142857142) internal successors, (103), 53 states have internal predecessors, (103), 8 states have call successors, (10), 3 states have call predecessors, (10), 8 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) Word has length 73 [2024-11-12 13:18:53,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:18:53,214 INFO L225 Difference]: With dead ends: 475 [2024-11-12 13:18:53,214 INFO L226 Difference]: Without dead ends: 475 [2024-11-12 13:18:53,214 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2313 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=575, Invalid=8550, Unknown=3, NotChecked=378, Total=9506 [2024-11-12 13:18:53,215 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 205 mSDsluCounter, 1013 mSDsCounter, 0 mSdLazyCounter, 2351 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 1057 SdHoareTripleChecker+Invalid, 2698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 2351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 298 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-12 13:18:53,215 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 1057 Invalid, 2698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 2351 Invalid, 0 Unknown, 298 Unchecked, 1.8s Time] [2024-11-12 13:18:53,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2024-11-12 13:18:53,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 376. [2024-11-12 13:18:53,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 293 states have (on average 1.1433447098976108) internal successors, (335), 304 states have internal predecessors, (335), 48 states have call successors, (48), 24 states have call predecessors, (48), 24 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2024-11-12 13:18:53,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 431 transitions. [2024-11-12 13:18:53,224 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 431 transitions. Word has length 73 [2024-11-12 13:18:53,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:18:53,225 INFO L471 AbstractCegarLoop]: Abstraction has 376 states and 431 transitions. [2024-11-12 13:18:53,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 56 states have (on average 1.8392857142857142) internal successors, (103), 53 states have internal predecessors, (103), 8 states have call successors, (10), 3 states have call predecessors, (10), 8 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2024-11-12 13:18:53,225 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 431 transitions. [2024-11-12 13:18:53,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-12 13:18:53,226 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:18:53,226 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:18:53,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-12 13:18:53,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:18:53,427 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-12 13:18:53,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:18:53,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1170235724, now seen corresponding path program 5 times [2024-11-12 13:18:53,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:18:53,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709004286] [2024-11-12 13:18:53,427 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:18:53,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:18:53,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:53,847 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-12 13:18:53,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:53,849 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-12 13:18:53,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:53,864 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-12 13:18:53,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:53,866 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-12 13:18:53,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:18:53,867 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 31 proven. 91 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-12 13:18:53,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:18:53,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709004286] [2024-11-12 13:18:53,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709004286] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:18:53,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739554879] [2024-11-12 13:18:53,868 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-12 13:18:53,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:18:53,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:18:53,870 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:18:53,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-12 13:18:54,155 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-12 13:18:54,155 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:18:54,158 INFO L256 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-12 13:18:54,160 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:18:54,488 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 24 proven. 98 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-12 13:18:54,488 INFO L312 TraceCheckSpWp]: Computing backward predicates...