./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrstr-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrstr-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl --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 991fb09b573d5827d0db553f1ea89a581f5a664ba8b68d6f14a043df738f2f6d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:13:29,479 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:13:29,597 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-12 02:13:29,607 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:13:29,608 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:13:29,644 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:13:29,645 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:13:29,646 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:13:29,647 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:13:29,652 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:13:29,653 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:13:29,653 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:13:29,654 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:13:29,655 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:13:29,656 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:13:29,656 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:13:29,657 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:13:29,657 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:13:29,658 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 02:13:29,658 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 02:13:29,658 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 02:13:29,659 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:13:29,659 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 02:13:29,660 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 02:13:29,660 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:13:29,661 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:13:29,662 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:13:29,662 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:13:29,663 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:13:29,663 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:13:29,664 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:13:29,665 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:13:29,665 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:13:29,665 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:13:29,665 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:13:29,666 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:13:29,666 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:13:29,666 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:13:29,667 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 991fb09b573d5827d0db553f1ea89a581f5a664ba8b68d6f14a043df738f2f6d [2023-11-12 02:13:29,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:13:30,028 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:13:30,032 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:13:30,033 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:13:30,034 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:13:30,035 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/array-memsafety/openbsd_cstrstr-alloca-2.i [2023-11-12 02:13:33,327 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:13:33,673 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:13:33,674 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/sv-benchmarks/c/array-memsafety/openbsd_cstrstr-alloca-2.i [2023-11-12 02:13:33,692 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/data/bbd0f936d/f015d4fd47504199bde2b0c745192f83/FLAGca94a2252 [2023-11-12 02:13:33,711 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/data/bbd0f936d/f015d4fd47504199bde2b0c745192f83 [2023-11-12 02:13:33,717 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:13:33,720 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:13:33,723 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:13:33,723 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:13:33,729 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:13:33,730 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:13:33" (1/1) ... [2023-11-12 02:13:33,731 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cc3f5d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:33, skipping insertion in model container [2023-11-12 02:13:33,731 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:13:33" (1/1) ... [2023-11-12 02:13:33,794 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:13:34,137 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:13:34,151 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:13:34,221 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:13:34,255 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:13:34,256 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:34 WrapperNode [2023-11-12 02:13:34,256 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:13:34,257 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:13:34,257 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:13:34,257 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:13:34,265 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:34" (1/1) ... [2023-11-12 02:13:34,281 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:34" (1/1) ... [2023-11-12 02:13:34,309 INFO L138 Inliner]: procedures = 119, calls = 23, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 165 [2023-11-12 02:13:34,310 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:13:34,310 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:13:34,311 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:13:34,311 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:13:34,320 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:34" (1/1) ... [2023-11-12 02:13:34,321 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:34" (1/1) ... [2023-11-12 02:13:34,325 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:34" (1/1) ... [2023-11-12 02:13:34,326 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:34" (1/1) ... [2023-11-12 02:13:34,335 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:34" (1/1) ... [2023-11-12 02:13:34,339 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:34" (1/1) ... [2023-11-12 02:13:34,341 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:34" (1/1) ... [2023-11-12 02:13:34,343 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:34" (1/1) ... [2023-11-12 02:13:34,347 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:13:34,348 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:13:34,348 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:13:34,348 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:13:34,349 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:34" (1/1) ... [2023-11-12 02:13:34,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:13:34,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:13:34,403 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:13:34,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:13:34,449 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:13:34,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:13:34,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:13:34,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:13:34,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:13:34,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:13:34,634 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:13:34,636 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:13:35,062 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:13:35,069 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:13:35,069 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-12 02:13:35,071 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:13:35 BoogieIcfgContainer [2023-11-12 02:13:35,072 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:13:35,075 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:13:35,075 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:13:35,079 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:13:35,079 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:13:33" (1/3) ... [2023-11-12 02:13:35,085 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b4cdf52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:13:35, skipping insertion in model container [2023-11-12 02:13:35,085 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:34" (2/3) ... [2023-11-12 02:13:35,086 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b4cdf52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:13:35, skipping insertion in model container [2023-11-12 02:13:35,086 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:13:35" (3/3) ... [2023-11-12 02:13:35,087 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrstr-alloca-2.i [2023-11-12 02:13:35,110 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:13:35,111 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 25 error locations. [2023-11-12 02:13:35,174 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:13:35,182 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6ce04743, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:13:35,182 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2023-11-12 02:13:35,187 INFO L276 IsEmpty]: Start isEmpty. Operand has 80 states, 54 states have (on average 1.8148148148148149) internal successors, (98), 79 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:35,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 02:13:35,194 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:13:35,194 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:35,195 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-12 02:13:35,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:35,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2023-11-12 02:13:35,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:35,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516498268] [2023-11-12 02:13:35,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:35,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:35,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:35,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:13:35,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:35,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516498268] [2023-11-12 02:13:35,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516498268] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:13:35,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:13:35,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:13:35,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144937491] [2023-11-12 02:13:35,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:13:35,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:13:35,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:35,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:13:35,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:13:35,622 INFO L87 Difference]: Start difference. First operand has 80 states, 54 states have (on average 1.8148148148148149) internal successors, (98), 79 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:35,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:13:35,698 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2023-11-12 02:13:35,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:13:35,701 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-12 02:13:35,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:13:35,709 INFO L225 Difference]: With dead ends: 78 [2023-11-12 02:13:35,709 INFO L226 Difference]: Without dead ends: 76 [2023-11-12 02:13:35,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:13:35,715 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 78 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:13:35,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 69 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:13:35,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-12 02:13:35,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2023-11-12 02:13:35,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 53 states have (on average 1.6603773584905661) internal successors, (88), 75 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:35,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 88 transitions. [2023-11-12 02:13:35,754 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 88 transitions. Word has length 7 [2023-11-12 02:13:35,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:13:35,754 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 88 transitions. [2023-11-12 02:13:35,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:35,755 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 88 transitions. [2023-11-12 02:13:35,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 02:13:35,756 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:13:35,756 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:35,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:13:35,757 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-12 02:13:35,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:35,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029097, now seen corresponding path program 1 times [2023-11-12 02:13:35,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:35,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725515262] [2023-11-12 02:13:35,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:35,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:35,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:36,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:13:36,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:36,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725515262] [2023-11-12 02:13:36,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725515262] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:13:36,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:13:36,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:13:36,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635246168] [2023-11-12 02:13:36,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:13:36,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:13:36,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:36,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:13:36,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:13:36,289 INFO L87 Difference]: Start difference. First operand 76 states and 88 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:36,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:13:36,593 INFO L93 Difference]: Finished difference Result 153 states and 176 transitions. [2023-11-12 02:13:36,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:13:36,594 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-12 02:13:36,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:13:36,603 INFO L225 Difference]: With dead ends: 153 [2023-11-12 02:13:36,603 INFO L226 Difference]: Without dead ends: 153 [2023-11-12 02:13:36,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:13:36,609 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 90 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:13:36,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 454 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:13:36,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-11-12 02:13:36,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 80. [2023-11-12 02:13:36,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 57 states have (on average 1.631578947368421) internal successors, (93), 79 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:36,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2023-11-12 02:13:36,632 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 7 [2023-11-12 02:13:36,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:13:36,633 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2023-11-12 02:13:36,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:36,633 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2023-11-12 02:13:36,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 02:13:36,634 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:13:36,634 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:36,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:13:36,635 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-12 02:13:36,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:36,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2023-11-12 02:13:36,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:36,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183437058] [2023-11-12 02:13:36,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:36,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:36,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:36,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:13:36,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:36,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183437058] [2023-11-12 02:13:36,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183437058] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:13:36,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:13:36,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:13:36,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985227722] [2023-11-12 02:13:36,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:13:36,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:13:36,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:36,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:13:36,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:13:36,995 INFO L87 Difference]: Start difference. First operand 80 states and 93 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:37,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:13:37,072 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2023-11-12 02:13:37,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:13:37,073 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-12 02:13:37,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:13:37,075 INFO L225 Difference]: With dead ends: 84 [2023-11-12 02:13:37,076 INFO L226 Difference]: Without dead ends: 84 [2023-11-12 02:13:37,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:13:37,082 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 177 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:13:37,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 135 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:13:37,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-11-12 02:13:37,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2023-11-12 02:13:37,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 55 states have (on average 1.6363636363636365) internal successors, (90), 77 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:37,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2023-11-12 02:13:37,105 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 7 [2023-11-12 02:13:37,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:13:37,106 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2023-11-12 02:13:37,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:37,107 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2023-11-12 02:13:37,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-12 02:13:37,108 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:13:37,108 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:37,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:13:37,110 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-12 02:13:37,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:37,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1906083540, now seen corresponding path program 1 times [2023-11-12 02:13:37,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:37,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904919969] [2023-11-12 02:13:37,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:37,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:37,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:37,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:13:37,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:37,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904919969] [2023-11-12 02:13:37,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904919969] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:13:37,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019978554] [2023-11-12 02:13:37,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:37,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:37,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:13:37,207 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:13:37,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:13:37,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:37,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:13:37,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:13:37,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:13:37,421 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:13:37,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019978554] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:13:37,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:13:37,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-12 02:13:37,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203418620] [2023-11-12 02:13:37,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:13:37,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:13:37,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:37,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:13:37,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:13:37,426 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:37,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:13:37,471 INFO L93 Difference]: Finished difference Result 151 states and 173 transitions. [2023-11-12 02:13:37,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:13:37,472 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-12 02:13:37,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:13:37,473 INFO L225 Difference]: With dead ends: 151 [2023-11-12 02:13:37,473 INFO L226 Difference]: Without dead ends: 151 [2023-11-12 02:13:37,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:13:37,476 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 77 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:13:37,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 311 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:13:37,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-11-12 02:13:37,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 85. [2023-11-12 02:13:37,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 62 states have (on average 1.5806451612903225) internal successors, (98), 84 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:37,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 98 transitions. [2023-11-12 02:13:37,493 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 98 transitions. Word has length 11 [2023-11-12 02:13:37,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:13:37,494 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 98 transitions. [2023-11-12 02:13:37,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:37,494 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 98 transitions. [2023-11-12 02:13:37,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-12 02:13:37,495 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:13:37,495 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:37,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:13:37,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:37,696 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-12 02:13:37,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:37,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2023-11-12 02:13:37,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:37,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614670751] [2023-11-12 02:13:37,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:37,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:37,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:37,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:13:37,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:37,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614670751] [2023-11-12 02:13:37,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614670751] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:13:37,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468898326] [2023-11-12 02:13:37,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:37,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:37,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:13:37,999 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:13:38,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:13:38,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:38,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-12 02:13:38,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:13:38,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:13:38,157 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-12 02:13:38,167 INFO L351 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 10 treesize of output 8 [2023-11-12 02:13:38,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:13:38,423 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:13:38,692 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 02:13:38,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:13:38,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468898326] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:13:38,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:13:38,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-11-12 02:13:38,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27894149] [2023-11-12 02:13:38,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:13:38,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-12 02:13:38,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:38,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-12 02:13:38,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-12 02:13:38,758 INFO L87 Difference]: Start difference. First operand 85 states and 98 transitions. Second operand has 17 states, 16 states have (on average 1.9375) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:39,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:13:39,064 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2023-11-12 02:13:39,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:13:39,065 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.9375) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-12 02:13:39,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:13:39,066 INFO L225 Difference]: With dead ends: 86 [2023-11-12 02:13:39,066 INFO L226 Difference]: Without dead ends: 86 [2023-11-12 02:13:39,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2023-11-12 02:13:39,067 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 165 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:13:39,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 354 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:13:39,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-12 02:13:39,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2023-11-12 02:13:39,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 61 states have (on average 1.5737704918032787) internal successors, (96), 82 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:39,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2023-11-12 02:13:39,073 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 11 [2023-11-12 02:13:39,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:13:39,074 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2023-11-12 02:13:39,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.9375) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:39,074 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2023-11-12 02:13:39,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-12 02:13:39,075 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:13:39,075 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:39,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:13:39,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:39,281 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-12 02:13:39,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:39,281 INFO L85 PathProgramCache]: Analyzing trace with hash -2090265385, now seen corresponding path program 1 times [2023-11-12 02:13:39,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:39,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081768873] [2023-11-12 02:13:39,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:39,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:39,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:39,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:13:39,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:39,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081768873] [2023-11-12 02:13:39,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081768873] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:13:39,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:13:39,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:13:39,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89784341] [2023-11-12 02:13:39,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:13:39,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:13:39,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:39,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:13:39,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:13:39,367 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:39,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:13:39,408 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2023-11-12 02:13:39,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:13:39,409 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-12 02:13:39,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:13:39,410 INFO L225 Difference]: With dead ends: 81 [2023-11-12 02:13:39,410 INFO L226 Difference]: Without dead ends: 81 [2023-11-12 02:13:39,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:13:39,414 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 69 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:13:39,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 65 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:13:39,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-12 02:13:39,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-11-12 02:13:39,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 61 states have (on average 1.540983606557377) internal successors, (94), 80 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:39,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2023-11-12 02:13:39,422 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 13 [2023-11-12 02:13:39,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:13:39,424 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2023-11-12 02:13:39,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:39,425 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2023-11-12 02:13:39,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-12 02:13:39,426 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:13:39,426 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:39,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:13:39,427 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-12 02:13:39,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:39,427 INFO L85 PathProgramCache]: Analyzing trace with hash -2090265384, now seen corresponding path program 1 times [2023-11-12 02:13:39,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:39,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805942744] [2023-11-12 02:13:39,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:39,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:39,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:39,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:13:39,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:39,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805942744] [2023-11-12 02:13:39,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805942744] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:13:39,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:13:39,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:13:39,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573626913] [2023-11-12 02:13:39,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:13:39,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:13:39,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:39,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:13:39,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:13:39,666 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:39,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:13:39,867 INFO L93 Difference]: Finished difference Result 161 states and 184 transitions. [2023-11-12 02:13:39,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:13:39,867 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-12 02:13:39,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:13:39,869 INFO L225 Difference]: With dead ends: 161 [2023-11-12 02:13:39,869 INFO L226 Difference]: Without dead ends: 161 [2023-11-12 02:13:39,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:13:39,870 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 164 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:13:39,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 356 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:13:39,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-11-12 02:13:39,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 96. [2023-11-12 02:13:39,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 76 states have (on average 1.4473684210526316) internal successors, (110), 95 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:39,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2023-11-12 02:13:39,886 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 13 [2023-11-12 02:13:39,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:13:39,886 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2023-11-12 02:13:39,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:39,887 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2023-11-12 02:13:39,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-12 02:13:39,888 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:13:39,888 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:39,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 02:13:39,889 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-12 02:13:39,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:39,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1811674902, now seen corresponding path program 1 times [2023-11-12 02:13:39,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:39,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972472849] [2023-11-12 02:13:39,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:39,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:39,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:40,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:13:40,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:40,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972472849] [2023-11-12 02:13:40,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972472849] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:13:40,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:13:40,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:13:40,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006347761] [2023-11-12 02:13:40,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:13:40,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:13:40,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:40,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:13:40,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:13:40,110 INFO L87 Difference]: Start difference. First operand 96 states and 110 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:40,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:13:40,227 INFO L93 Difference]: Finished difference Result 99 states and 113 transitions. [2023-11-12 02:13:40,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:13:40,228 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-12 02:13:40,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:13:40,229 INFO L225 Difference]: With dead ends: 99 [2023-11-12 02:13:40,229 INFO L226 Difference]: Without dead ends: 99 [2023-11-12 02:13:40,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:13:40,231 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 148 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:13:40,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 164 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:13:40,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-11-12 02:13:40,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 82. [2023-11-12 02:13:40,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 63 states have (on average 1.507936507936508) internal successors, (95), 81 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:40,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2023-11-12 02:13:40,235 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 13 [2023-11-12 02:13:40,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:13:40,236 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2023-11-12 02:13:40,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:40,236 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2023-11-12 02:13:40,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-12 02:13:40,237 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:13:40,238 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:40,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 02:13:40,239 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-12 02:13:40,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:40,239 INFO L85 PathProgramCache]: Analyzing trace with hash -862198757, now seen corresponding path program 1 times [2023-11-12 02:13:40,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:40,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036538814] [2023-11-12 02:13:40,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:40,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:40,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:40,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:13:40,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:40,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036538814] [2023-11-12 02:13:40,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036538814] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:13:40,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079636082] [2023-11-12 02:13:40,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:40,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:40,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:13:40,320 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:13:40,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:13:40,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:40,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:13:40,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:13:40,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:13:40,456 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:13:40,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079636082] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:13:40,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:13:40,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-12 02:13:40,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389943724] [2023-11-12 02:13:40,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:13:40,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:13:40,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:40,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:13:40,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:13:40,458 INFO L87 Difference]: Start difference. First operand 82 states and 95 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:40,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:13:40,491 INFO L93 Difference]: Finished difference Result 157 states and 179 transitions. [2023-11-12 02:13:40,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:13:40,491 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-12 02:13:40,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:13:40,493 INFO L225 Difference]: With dead ends: 157 [2023-11-12 02:13:40,493 INFO L226 Difference]: Without dead ends: 157 [2023-11-12 02:13:40,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:13:40,494 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 66 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:13:40,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 295 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:13:40,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-11-12 02:13:40,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 100. [2023-11-12 02:13:40,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 81 states have (on average 1.4074074074074074) internal successors, (114), 99 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:40,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 114 transitions. [2023-11-12 02:13:40,499 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 114 transitions. Word has length 17 [2023-11-12 02:13:40,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:13:40,499 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 114 transitions. [2023-11-12 02:13:40,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:40,499 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 114 transitions. [2023-11-12 02:13:40,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-12 02:13:40,500 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:13:40,500 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:40,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:13:40,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:40,706 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-12 02:13:40,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:40,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1873316007, now seen corresponding path program 1 times [2023-11-12 02:13:40,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:40,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848873222] [2023-11-12 02:13:40,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:40,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:40,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:41,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:13:41,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:41,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848873222] [2023-11-12 02:13:41,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848873222] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:13:41,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792051710] [2023-11-12 02:13:41,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:41,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:41,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:13:41,037 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:13:41,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:13:41,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:41,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-12 02:13:41,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:13:41,148 INFO L351 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 [2023-11-12 02:13:41,160 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-12 02:13:41,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:13:41,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:13:41,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:13:41,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792051710] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:13:41,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:13:41,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-12 02:13:41,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974410179] [2023-11-12 02:13:41,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:13:41,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-12 02:13:41,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:41,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-12 02:13:41,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2023-11-12 02:13:41,906 INFO L87 Difference]: Start difference. First operand 100 states and 114 transitions. Second operand has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:42,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:13:42,222 INFO L93 Difference]: Finished difference Result 101 states and 115 transitions. [2023-11-12 02:13:42,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:13:42,222 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-12 02:13:42,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:13:42,223 INFO L225 Difference]: With dead ends: 101 [2023-11-12 02:13:42,223 INFO L226 Difference]: Without dead ends: 101 [2023-11-12 02:13:42,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=388, Unknown=0, NotChecked=0, Total=552 [2023-11-12 02:13:42,225 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 405 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:13:42,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 269 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:13:42,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-11-12 02:13:42,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2023-11-12 02:13:42,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 80 states have (on average 1.4) internal successors, (112), 97 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:42,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 112 transitions. [2023-11-12 02:13:42,228 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 112 transitions. Word has length 17 [2023-11-12 02:13:42,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:13:42,229 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 112 transitions. [2023-11-12 02:13:42,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:42,229 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 112 transitions. [2023-11-12 02:13:42,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-12 02:13:42,230 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:13:42,230 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:42,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:13:42,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:13:42,441 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-12 02:13:42,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:42,441 INFO L85 PathProgramCache]: Analyzing trace with hash -958359342, now seen corresponding path program 1 times [2023-11-12 02:13:42,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:42,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387935677] [2023-11-12 02:13:42,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:42,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:42,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:42,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:13:42,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:42,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387935677] [2023-11-12 02:13:42,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387935677] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:13:42,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516702620] [2023-11-12 02:13:42,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:42,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:42,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:13:42,550 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:13:42,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:13:42,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:42,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:13:42,633 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:13:42,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:13:42,769 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:13:42,838 INFO L351 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 [2023-11-12 02:13:42,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:13:42,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516702620] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:13:42,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:13:42,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2023-11-12 02:13:42,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840363514] [2023-11-12 02:13:42,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:13:42,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:13:42,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:42,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:13:42,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:13:42,892 INFO L87 Difference]: Start difference. First operand 98 states and 112 transitions. Second operand has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:43,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:13:43,085 INFO L93 Difference]: Finished difference Result 166 states and 189 transitions. [2023-11-12 02:13:43,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:13:43,086 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-12 02:13:43,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:13:43,087 INFO L225 Difference]: With dead ends: 166 [2023-11-12 02:13:43,087 INFO L226 Difference]: Without dead ends: 166 [2023-11-12 02:13:43,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:13:43,088 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 259 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:13:43,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 338 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:13:43,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2023-11-12 02:13:43,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 112. [2023-11-12 02:13:43,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 94 states have (on average 1.351063829787234) internal successors, (127), 111 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:43,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 127 transitions. [2023-11-12 02:13:43,092 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 127 transitions. Word has length 18 [2023-11-12 02:13:43,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:13:43,092 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 127 transitions. [2023-11-12 02:13:43,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:43,093 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 127 transitions. [2023-11-12 02:13:43,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-12 02:13:43,093 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:13:43,094 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:43,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:13:43,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-12 02:13:43,300 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-12 02:13:43,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:43,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1979427696, now seen corresponding path program 1 times [2023-11-12 02:13:43,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:43,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541355156] [2023-11-12 02:13:43,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:43,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:43,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:43,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:13:43,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:43,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541355156] [2023-11-12 02:13:43,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541355156] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:13:43,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:13:43,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:13:43,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382151985] [2023-11-12 02:13:43,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:13:43,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:13:43,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:43,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:13:43,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:13:43,421 INFO L87 Difference]: Start difference. First operand 112 states and 127 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:43,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:13:43,498 INFO L93 Difference]: Finished difference Result 111 states and 126 transitions. [2023-11-12 02:13:43,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:13:43,499 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-12 02:13:43,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:13:43,500 INFO L225 Difference]: With dead ends: 111 [2023-11-12 02:13:43,500 INFO L226 Difference]: Without dead ends: 111 [2023-11-12 02:13:43,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:13:43,501 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 66 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:13:43,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 114 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:13:43,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-11-12 02:13:43,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 97. [2023-11-12 02:13:43,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 80 states have (on average 1.3875) internal successors, (111), 96 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:43,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 111 transitions. [2023-11-12 02:13:43,505 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 111 transitions. Word has length 18 [2023-11-12 02:13:43,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:13:43,505 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 111 transitions. [2023-11-12 02:13:43,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:43,506 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 111 transitions. [2023-11-12 02:13:43,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-12 02:13:43,507 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:13:43,507 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:43,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-12 02:13:43,507 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-12 02:13:43,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:43,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1835545879, now seen corresponding path program 1 times [2023-11-12 02:13:43,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:43,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265807449] [2023-11-12 02:13:43,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:43,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:43,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:13:43,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:43,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265807449] [2023-11-12 02:13:43,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265807449] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:13:43,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:13:43,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:13:43,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400668652] [2023-11-12 02:13:43,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:13:43,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:13:43,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:43,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:13:43,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:13:43,560 INFO L87 Difference]: Start difference. First operand 97 states and 111 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:43,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:13:43,619 INFO L93 Difference]: Finished difference Result 96 states and 110 transitions. [2023-11-12 02:13:43,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:13:43,619 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-12 02:13:43,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:13:43,620 INFO L225 Difference]: With dead ends: 96 [2023-11-12 02:13:43,620 INFO L226 Difference]: Without dead ends: 96 [2023-11-12 02:13:43,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:13:43,622 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 68 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:13:43,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 115 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:13:43,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-11-12 02:13:43,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2023-11-12 02:13:43,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 80 states have (on average 1.375) internal successors, (110), 95 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:43,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2023-11-12 02:13:43,626 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 21 [2023-11-12 02:13:43,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:13:43,626 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2023-11-12 02:13:43,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:43,627 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2023-11-12 02:13:43,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-12 02:13:43,627 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:13:43,628 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:43,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-12 02:13:43,628 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-12 02:13:43,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:43,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1835545878, now seen corresponding path program 1 times [2023-11-12 02:13:43,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:43,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100617111] [2023-11-12 02:13:43,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:43,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:43,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:43,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:13:43,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:43,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100617111] [2023-11-12 02:13:43,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100617111] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:13:43,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132585224] [2023-11-12 02:13:43,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:43,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:43,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:13:43,965 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:13:43,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:13:44,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:44,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-12 02:13:44,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:13:44,068 INFO L351 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 1 [2023-11-12 02:13:44,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:13:44,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:13:44,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:13:44,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132585224] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:13:44,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:13:44,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 13 [2023-11-12 02:13:44,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342739686] [2023-11-12 02:13:44,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:13:44,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:13:44,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:44,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:13:44,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:13:44,270 INFO L87 Difference]: Start difference. First operand 96 states and 110 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:44,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:13:44,357 INFO L93 Difference]: Finished difference Result 96 states and 110 transitions. [2023-11-12 02:13:44,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:13:44,357 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-12 02:13:44,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:13:44,358 INFO L225 Difference]: With dead ends: 96 [2023-11-12 02:13:44,358 INFO L226 Difference]: Without dead ends: 96 [2023-11-12 02:13:44,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2023-11-12 02:13:44,359 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 123 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:13:44,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 134 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:13:44,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-11-12 02:13:44,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2023-11-12 02:13:44,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 80 states have (on average 1.3625) internal successors, (109), 94 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:44,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 109 transitions. [2023-11-12 02:13:44,363 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 109 transitions. Word has length 21 [2023-11-12 02:13:44,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:13:44,364 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 109 transitions. [2023-11-12 02:13:44,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:44,364 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 109 transitions. [2023-11-12 02:13:44,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-12 02:13:44,365 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:13:44,365 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:44,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-12 02:13:44,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-12 02:13:44,576 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-12 02:13:44,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:44,577 INFO L85 PathProgramCache]: Analyzing trace with hash 776363259, now seen corresponding path program 1 times [2023-11-12 02:13:44,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:44,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151901103] [2023-11-12 02:13:44,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:44,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:44,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:44,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:13:44,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:44,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151901103] [2023-11-12 02:13:44,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151901103] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:13:44,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:13:44,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:13:44,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067587372] [2023-11-12 02:13:44,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:13:44,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:13:44,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:44,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:13:44,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:13:44,670 INFO L87 Difference]: Start difference. First operand 95 states and 109 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:44,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:13:44,740 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2023-11-12 02:13:44,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:13:44,741 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-12 02:13:44,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:13:44,742 INFO L225 Difference]: With dead ends: 94 [2023-11-12 02:13:44,742 INFO L226 Difference]: Without dead ends: 94 [2023-11-12 02:13:44,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:13:44,744 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 121 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:13:44,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 120 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:13:44,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-12 02:13:44,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2023-11-12 02:13:44,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 80 states have (on average 1.35) internal successors, (108), 93 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:44,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 108 transitions. [2023-11-12 02:13:44,749 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 108 transitions. Word has length 24 [2023-11-12 02:13:44,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:13:44,749 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 108 transitions. [2023-11-12 02:13:44,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:44,749 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 108 transitions. [2023-11-12 02:13:44,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-12 02:13:44,753 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:13:44,753 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:44,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-12 02:13:44,754 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-12 02:13:44,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:44,754 INFO L85 PathProgramCache]: Analyzing trace with hash 776363260, now seen corresponding path program 1 times [2023-11-12 02:13:44,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:44,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146251544] [2023-11-12 02:13:44,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:44,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:44,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:45,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:13:45,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:45,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146251544] [2023-11-12 02:13:45,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146251544] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:13:45,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:13:45,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 02:13:45,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903406060] [2023-11-12 02:13:45,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:13:45,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:13:45,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:45,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:13:45,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:13:45,016 INFO L87 Difference]: Start difference. First operand 94 states and 108 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:45,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:13:45,189 INFO L93 Difference]: Finished difference Result 107 states and 120 transitions. [2023-11-12 02:13:45,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:13:45,191 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-12 02:13:45,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:13:45,192 INFO L225 Difference]: With dead ends: 107 [2023-11-12 02:13:45,192 INFO L226 Difference]: Without dead ends: 107 [2023-11-12 02:13:45,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:13:45,193 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 29 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:13:45,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 398 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:13:45,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-11-12 02:13:45,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 101. [2023-11-12 02:13:45,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 87 states have (on average 1.3218390804597702) internal successors, (115), 100 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:45,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 115 transitions. [2023-11-12 02:13:45,201 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 115 transitions. Word has length 24 [2023-11-12 02:13:45,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:13:45,201 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 115 transitions. [2023-11-12 02:13:45,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:45,201 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 115 transitions. [2023-11-12 02:13:45,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-12 02:13:45,204 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:13:45,204 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:45,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-12 02:13:45,204 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-12 02:13:45,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:45,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1199065086, now seen corresponding path program 1 times [2023-11-12 02:13:45,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:45,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410854936] [2023-11-12 02:13:45,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:45,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:45,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:45,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:13:45,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:45,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410854936] [2023-11-12 02:13:45,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410854936] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:13:45,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866775953] [2023-11-12 02:13:45,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:45,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:45,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:13:45,575 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:13:45,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:13:45,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:45,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-12 02:13:45,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:13:45,808 INFO L351 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 11 treesize of output 7 [2023-11-12 02:13:45,899 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 02:13:45,902 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:13:45,902 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2023-11-12 02:13:45,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:13:45,909 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:13:45,991 INFO L351 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 13 treesize of output 11 [2023-11-12 02:13:45,997 INFO L351 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 20 [2023-11-12 02:13:46,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:13:46,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866775953] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:13:46,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:13:46,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-11-12 02:13:46,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349035342] [2023-11-12 02:13:46,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:13:46,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-12 02:13:46,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:46,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-12 02:13:46,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2023-11-12 02:13:46,344 INFO L87 Difference]: Start difference. First operand 101 states and 115 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:46,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:13:46,757 INFO L93 Difference]: Finished difference Result 121 states and 135 transitions. [2023-11-12 02:13:46,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-12 02:13:46,758 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-12 02:13:46,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:13:46,759 INFO L225 Difference]: With dead ends: 121 [2023-11-12 02:13:46,760 INFO L226 Difference]: Without dead ends: 121 [2023-11-12 02:13:46,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=260, Invalid=796, Unknown=0, NotChecked=0, Total=1056 [2023-11-12 02:13:46,761 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 264 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:13:46,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 787 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:13:46,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-11-12 02:13:46,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 105. [2023-11-12 02:13:46,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 91 states have (on average 1.3186813186813187) internal successors, (120), 104 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:46,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 120 transitions. [2023-11-12 02:13:46,766 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 120 transitions. Word has length 24 [2023-11-12 02:13:46,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:13:46,766 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 120 transitions. [2023-11-12 02:13:46,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:46,767 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 120 transitions. [2023-11-12 02:13:46,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-12 02:13:46,767 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:13:46,767 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-12 02:13:46,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:13:46,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-12 02:13:46,976 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-12 02:13:46,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:46,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1235985958, now seen corresponding path program 1 times [2023-11-12 02:13:46,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:46,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582858329] [2023-11-12 02:13:46,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:46,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:47,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:47,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:13:47,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:47,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582858329] [2023-11-12 02:13:47,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582858329] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:13:47,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:13:47,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:13:47,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185123843] [2023-11-12 02:13:47,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:13:47,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:13:47,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:47,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:13:47,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:13:47,162 INFO L87 Difference]: Start difference. First operand 105 states and 120 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:47,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:13:47,209 INFO L93 Difference]: Finished difference Result 104 states and 119 transitions. [2023-11-12 02:13:47,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:13:47,209 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-12 02:13:47,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:13:47,210 INFO L225 Difference]: With dead ends: 104 [2023-11-12 02:13:47,210 INFO L226 Difference]: Without dead ends: 75 [2023-11-12 02:13:47,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:13:47,211 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 53 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:13:47,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 114 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:13:47,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-12 02:13:47,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-11-12 02:13:47,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 62 states have (on average 1.3548387096774193) internal successors, (84), 74 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:47,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2023-11-12 02:13:47,215 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 26 [2023-11-12 02:13:47,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:13:47,216 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2023-11-12 02:13:47,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:47,216 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2023-11-12 02:13:47,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-12 02:13:47,216 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:13:47,217 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:47,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-12 02:13:47,217 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-12 02:13:47,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:47,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1114312667, now seen corresponding path program 2 times [2023-11-12 02:13:47,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:47,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991826839] [2023-11-12 02:13:47,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:47,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:47,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:47,592 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:13:47,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:47,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991826839] [2023-11-12 02:13:47,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991826839] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:13:47,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725744906] [2023-11-12 02:13:47,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:13:47,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:47,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:13:47,595 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:13:47,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:13:47,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-12 02:13:47,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:13:47,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-12 02:13:47,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:13:47,715 INFO L351 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 1 [2023-11-12 02:13:47,747 INFO L351 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 14 treesize of output 10 [2023-11-12 02:13:47,874 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:13:47,875 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2023-11-12 02:13:48,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 02:13:48,004 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:13:48,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725744906] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:13:48,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:13:48,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2023-11-12 02:13:48,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347656385] [2023-11-12 02:13:48,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:13:48,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:13:48,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:48,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:13:48,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:13:48,008 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:48,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:13:48,465 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2023-11-12 02:13:48,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:13:48,466 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-11-12 02:13:48,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:13:48,466 INFO L225 Difference]: With dead ends: 80 [2023-11-12 02:13:48,466 INFO L226 Difference]: Without dead ends: 80 [2023-11-12 02:13:48,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-11-12 02:13:48,467 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 229 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:13:48,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 166 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:13:48,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-11-12 02:13:48,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2023-11-12 02:13:48,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 75 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:48,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2023-11-12 02:13:48,471 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 28 [2023-11-12 02:13:48,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:13:48,471 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2023-11-12 02:13:48,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:48,471 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2023-11-12 02:13:48,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-12 02:13:48,471 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:13:48,472 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:48,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:13:48,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:48,678 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-12 02:13:48,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:48,679 INFO L85 PathProgramCache]: Analyzing trace with hash 686447756, now seen corresponding path program 1 times [2023-11-12 02:13:48,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:48,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776335375] [2023-11-12 02:13:48,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:48,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:48,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:49,165 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:13:49,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:49,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776335375] [2023-11-12 02:13:49,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776335375] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:13:49,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875225089] [2023-11-12 02:13:49,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:49,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:49,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:13:49,168 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:13:49,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:13:49,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:49,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-12 02:13:49,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:13:49,436 INFO L351 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 [2023-11-12 02:13:49,631 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 02:13:49,634 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:13:49,634 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-11-12 02:13:49,638 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:13:49,638 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:13:49,743 INFO L351 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 15 treesize of output 13 [2023-11-12 02:13:49,747 INFO L351 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 24 treesize of output 20 [2023-11-12 02:13:50,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:13:50,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875225089] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:13:50,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:13:50,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2023-11-12 02:13:50,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65715481] [2023-11-12 02:13:50,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:13:50,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-12 02:13:50,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:50,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-12 02:13:50,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2023-11-12 02:13:50,078 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:50,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:13:50,642 INFO L93 Difference]: Finished difference Result 129 states and 144 transitions. [2023-11-12 02:13:50,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-12 02:13:50,642 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-11-12 02:13:50,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:13:50,643 INFO L225 Difference]: With dead ends: 129 [2023-11-12 02:13:50,643 INFO L226 Difference]: Without dead ends: 129 [2023-11-12 02:13:50,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=264, Invalid=1296, Unknown=0, NotChecked=0, Total=1560 [2023-11-12 02:13:50,646 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 675 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:13:50,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [675 Valid, 763 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:13:50,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-11-12 02:13:50,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 89. [2023-11-12 02:13:50,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 76 states have (on average 1.3026315789473684) internal successors, (99), 88 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:50,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2023-11-12 02:13:50,654 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 31 [2023-11-12 02:13:50,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:13:50,654 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2023-11-12 02:13:50,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:50,655 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2023-11-12 02:13:50,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-12 02:13:50,656 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:13:50,656 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:50,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:13:50,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:50,857 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-12 02:13:50,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:50,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1572713287, now seen corresponding path program 1 times [2023-11-12 02:13:50,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:50,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625182434] [2023-11-12 02:13:50,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:50,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:50,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:50,945 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:13:50,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:50,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625182434] [2023-11-12 02:13:50,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625182434] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:13:50,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:13:50,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:13:50,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437350125] [2023-11-12 02:13:50,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:13:50,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:13:50,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:50,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:13:50,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:13:50,948 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:51,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:13:51,010 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2023-11-12 02:13:51,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:13:51,010 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-11-12 02:13:51,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:13:51,011 INFO L225 Difference]: With dead ends: 88 [2023-11-12 02:13:51,011 INFO L226 Difference]: Without dead ends: 88 [2023-11-12 02:13:51,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:13:51,013 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 94 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:13:51,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 109 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:13:51,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-12 02:13:51,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-11-12 02:13:51,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 76 states have (on average 1.2894736842105263) internal successors, (98), 87 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:51,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2023-11-12 02:13:51,018 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 34 [2023-11-12 02:13:51,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:13:51,018 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2023-11-12 02:13:51,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:51,019 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2023-11-12 02:13:51,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-12 02:13:51,019 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:13:51,019 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:51,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-12 02:13:51,020 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-12 02:13:51,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:51,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1572713288, now seen corresponding path program 1 times [2023-11-12 02:13:51,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:51,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22173532] [2023-11-12 02:13:51,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:51,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:51,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:51,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:13:51,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:51,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22173532] [2023-11-12 02:13:51,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22173532] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:13:51,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539774363] [2023-11-12 02:13:51,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:51,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:51,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:13:51,248 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:13:51,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:13:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:51,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-12 02:13:51,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:13:51,518 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:13:51,518 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:13:51,627 INFO L351 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 20 treesize of output 16 [2023-11-12 02:13:51,639 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:13:51,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539774363] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:13:51,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:13:51,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2023-11-12 02:13:51,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071234963] [2023-11-12 02:13:51,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:13:51,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 02:13:51,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:51,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 02:13:51,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:13:51,642 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand has 11 states, 10 states have (on average 5.6) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:51,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:13:51,796 INFO L93 Difference]: Finished difference Result 96 states and 106 transitions. [2023-11-12 02:13:51,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:13:51,797 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.6) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-11-12 02:13:51,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:13:51,798 INFO L225 Difference]: With dead ends: 96 [2023-11-12 02:13:51,798 INFO L226 Difference]: Without dead ends: 96 [2023-11-12 02:13:51,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:13:51,799 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 126 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:13:51,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 212 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:13:51,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-11-12 02:13:51,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2023-11-12 02:13:51,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 79 states have (on average 1.2784810126582278) internal successors, (101), 90 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:51,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2023-11-12 02:13:51,802 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 34 [2023-11-12 02:13:51,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:13:51,802 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2023-11-12 02:13:51,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.6) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:51,802 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2023-11-12 02:13:51,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-12 02:13:51,803 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:13:51,803 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:51,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:13:52,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:52,008 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-12 02:13:52,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:52,009 INFO L85 PathProgramCache]: Analyzing trace with hash 285045263, now seen corresponding path program 2 times [2023-11-12 02:13:52,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:52,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711948387] [2023-11-12 02:13:52,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:52,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:52,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:52,393 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:13:52,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:52,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711948387] [2023-11-12 02:13:52,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711948387] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:13:52,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513804843] [2023-11-12 02:13:52,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:13:52,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:52,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:13:52,396 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:13:52,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:13:52,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:13:52,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:13:52,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-12 02:13:52,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:13:52,518 INFO L351 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 1 [2023-11-12 02:13:52,679 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:13:52,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:13:53,022 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:13:53,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513804843] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:13:53,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:13:53,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2023-11-12 02:13:53,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095941795] [2023-11-12 02:13:53,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:13:53,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-12 02:13:53,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:53,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-12 02:13:53,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2023-11-12 02:13:53,025 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand has 26 states, 25 states have (on average 3.4) internal successors, (85), 26 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:53,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:13:53,725 INFO L93 Difference]: Finished difference Result 140 states and 157 transitions. [2023-11-12 02:13:53,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-12 02:13:53,726 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.4) internal successors, (85), 26 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-11-12 02:13:53,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:13:53,727 INFO L225 Difference]: With dead ends: 140 [2023-11-12 02:13:53,727 INFO L226 Difference]: Without dead ends: 140 [2023-11-12 02:13:53,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=212, Invalid=978, Unknown=0, NotChecked=0, Total=1190 [2023-11-12 02:13:53,729 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 509 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:13:53,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [509 Valid, 1001 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 02:13:53,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-11-12 02:13:53,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 94. [2023-11-12 02:13:53,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 82 states have (on average 1.2804878048780488) internal successors, (105), 93 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:53,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 105 transitions. [2023-11-12 02:13:53,733 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 105 transitions. Word has length 35 [2023-11-12 02:13:53,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:13:53,733 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 105 transitions. [2023-11-12 02:13:53,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.4) internal successors, (85), 26 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:53,733 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 105 transitions. [2023-11-12 02:13:53,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-12 02:13:53,734 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:13:53,734 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:53,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 02:13:53,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-12 02:13:53,935 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-12 02:13:53,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:53,935 INFO L85 PathProgramCache]: Analyzing trace with hash 633101784, now seen corresponding path program 3 times [2023-11-12 02:13:53,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:53,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77038285] [2023-11-12 02:13:53,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:53,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:53,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:54,513 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:13:54,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:54,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77038285] [2023-11-12 02:13:54,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77038285] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:13:54,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889487293] [2023-11-12 02:13:54,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:13:54,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:54,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:13:54,516 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:13:54,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 02:13:54,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 02:13:54,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:13:54,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-12 02:13:54,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:13:54,685 INFO L351 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 1 [2023-11-12 02:13:54,722 INFO L351 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 14 treesize of output 10 [2023-11-12 02:13:55,384 INFO L322 Elim1Store]: treesize reduction 8, result has 76.5 percent of original size [2023-11-12 02:13:55,385 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 40 [2023-11-12 02:13:55,548 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 02:13:55,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:13:56,288 INFO L351 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 44 treesize of output 38 [2023-11-12 02:13:56,303 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 58 [2023-11-12 02:13:56,465 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 02:13:56,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889487293] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:13:56,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:13:56,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 14] total 39 [2023-11-12 02:13:56,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057093527] [2023-11-12 02:13:56,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:13:56,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-12 02:13:56,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:56,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-12 02:13:56,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1341, Unknown=0, NotChecked=0, Total=1482 [2023-11-12 02:13:56,476 INFO L87 Difference]: Start difference. First operand 94 states and 105 transitions. Second operand has 39 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 39 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:02,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:02,927 INFO L93 Difference]: Finished difference Result 156 states and 175 transitions. [2023-11-12 02:14:02,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-12 02:14:02,928 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 39 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-11-12 02:14:02,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:02,929 INFO L225 Difference]: With dead ends: 156 [2023-11-12 02:14:02,929 INFO L226 Difference]: Without dead ends: 156 [2023-11-12 02:14:02,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=882, Invalid=4520, Unknown=0, NotChecked=0, Total=5402 [2023-11-12 02:14:02,932 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 546 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 1293 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:02,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [546 Valid, 1146 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1293 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-12 02:14:02,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-11-12 02:14:02,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 103. [2023-11-12 02:14:02,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 92 states have (on average 1.25) internal successors, (115), 102 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:02,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2023-11-12 02:14:02,937 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 38 [2023-11-12 02:14:02,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:02,937 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2023-11-12 02:14:02,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 39 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:02,938 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2023-11-12 02:14:02,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-12 02:14:02,938 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:02,939 INFO L195 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:02,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:03,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:03,150 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-12 02:14:03,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:03,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1598607422, now seen corresponding path program 1 times [2023-11-12 02:14:03,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:03,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288727263] [2023-11-12 02:14:03,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:03,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:03,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:03,470 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 02:14:03,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:03,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288727263] [2023-11-12 02:14:03,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288727263] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:03,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:03,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-12 02:14:03,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567512415] [2023-11-12 02:14:03,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:03,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:14:03,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:03,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:14:03,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:14:03,473 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:03,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:03,626 INFO L93 Difference]: Finished difference Result 157 states and 173 transitions. [2023-11-12 02:14:03,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:14:03,627 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-12 02:14:03,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:03,628 INFO L225 Difference]: With dead ends: 157 [2023-11-12 02:14:03,628 INFO L226 Difference]: Without dead ends: 96 [2023-11-12 02:14:03,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:14:03,629 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 51 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:03,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 379 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:14:03,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-11-12 02:14:03,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2023-11-12 02:14:03,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 85 states have (on average 1.2588235294117647) internal successors, (107), 95 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:03,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 107 transitions. [2023-11-12 02:14:03,632 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 107 transitions. Word has length 39 [2023-11-12 02:14:03,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:03,632 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 107 transitions. [2023-11-12 02:14:03,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:03,632 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 107 transitions. [2023-11-12 02:14:03,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-12 02:14:03,633 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:03,633 INFO L195 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:03,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-12 02:14:03,634 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-12 02:14:03,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:03,634 INFO L85 PathProgramCache]: Analyzing trace with hash -939075900, now seen corresponding path program 1 times [2023-11-12 02:14:03,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:03,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402795992] [2023-11-12 02:14:03,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:03,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:03,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:04,109 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:14:04,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:04,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402795992] [2023-11-12 02:14:04,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402795992] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:04,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546866382] [2023-11-12 02:14:04,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:04,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:04,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:04,112 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:04,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-12 02:14:04,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:04,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-12 02:14:04,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:04,422 INFO L351 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 11 treesize of output 7 [2023-11-12 02:14:04,467 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-12 02:14:04,468 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 [2023-11-12 02:14:04,777 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:14:04,777 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2023-11-12 02:14:04,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:14:04,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:05,171 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:14:05,171 INFO L351 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 34 [2023-11-12 02:14:05,182 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:14:05,182 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 51 [2023-11-12 02:14:05,196 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:14:05,196 INFO L351 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 31 treesize of output 31 [2023-11-12 02:14:05,445 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:14:05,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546866382] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:14:05,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:14:05,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 33 [2023-11-12 02:14:05,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548557047] [2023-11-12 02:14:05,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:14:05,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-12 02:14:05,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:05,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-12 02:14:05,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2023-11-12 02:14:05,449 INFO L87 Difference]: Start difference. First operand 96 states and 107 transitions. Second operand has 33 states, 33 states have (on average 2.787878787878788) internal successors, (92), 33 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:06,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:06,294 INFO L93 Difference]: Finished difference Result 161 states and 177 transitions. [2023-11-12 02:14:06,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-12 02:14:06,295 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.787878787878788) internal successors, (92), 33 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-12 02:14:06,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:06,295 INFO L225 Difference]: With dead ends: 161 [2023-11-12 02:14:06,296 INFO L226 Difference]: Without dead ends: 107 [2023-11-12 02:14:06,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=340, Invalid=1822, Unknown=0, NotChecked=0, Total=2162 [2023-11-12 02:14:06,297 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 282 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:06,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 916 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:14:06,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-11-12 02:14:06,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 100. [2023-11-12 02:14:06,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 89 states have (on average 1.247191011235955) internal successors, (111), 99 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:06,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 111 transitions. [2023-11-12 02:14:06,300 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 111 transitions. Word has length 39 [2023-11-12 02:14:06,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:06,300 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 111 transitions. [2023-11-12 02:14:06,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.787878787878788) internal successors, (92), 33 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:06,301 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 111 transitions. [2023-11-12 02:14:06,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-12 02:14:06,301 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:06,301 INFO L195 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] [2023-11-12 02:14:06,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:06,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-12 02:14:06,508 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-12 02:14:06,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:06,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1815079673, now seen corresponding path program 2 times [2023-11-12 02:14:06,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:06,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847179535] [2023-11-12 02:14:06,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:06,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:06,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:06,810 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:14:06,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:06,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847179535] [2023-11-12 02:14:06,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847179535] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:06,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030625119] [2023-11-12 02:14:06,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:14:06,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:06,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:06,812 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:06,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-12 02:14:06,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:14:06,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:14:06,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-12 02:14:06,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:07,102 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:14:07,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:07,302 INFO L351 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 5 treesize of output 3 [2023-11-12 02:14:07,364 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:14:07,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030625119] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:14:07,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:14:07,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2023-11-12 02:14:07,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913161731] [2023-11-12 02:14:07,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:14:07,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-12 02:14:07,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:07,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-12 02:14:07,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2023-11-12 02:14:07,366 INFO L87 Difference]: Start difference. First operand 100 states and 111 transitions. Second operand has 20 states, 19 states have (on average 4.578947368421052) internal successors, (87), 20 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:07,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:07,751 INFO L93 Difference]: Finished difference Result 136 states and 152 transitions. [2023-11-12 02:14:07,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:14:07,752 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.578947368421052) internal successors, (87), 20 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-11-12 02:14:07,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:07,753 INFO L225 Difference]: With dead ends: 136 [2023-11-12 02:14:07,753 INFO L226 Difference]: Without dead ends: 136 [2023-11-12 02:14:07,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2023-11-12 02:14:07,754 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 458 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:07,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 447 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:14:07,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-11-12 02:14:07,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 123. [2023-11-12 02:14:07,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 112 states have (on average 1.3303571428571428) internal successors, (149), 122 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:07,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 149 transitions. [2023-11-12 02:14:07,758 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 149 transitions. Word has length 43 [2023-11-12 02:14:07,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:07,758 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 149 transitions. [2023-11-12 02:14:07,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.578947368421052) internal successors, (87), 20 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:07,759 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 149 transitions. [2023-11-12 02:14:07,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-12 02:14:07,759 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:07,759 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-12 02:14:07,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:07,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-12 02:14:07,965 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-12 02:14:07,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:07,966 INFO L85 PathProgramCache]: Analyzing trace with hash -432935567, now seen corresponding path program 1 times [2023-11-12 02:14:07,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:07,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116307581] [2023-11-12 02:14:07,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:07,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:07,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:08,066 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 02:14:08,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:08,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116307581] [2023-11-12 02:14:08,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116307581] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:08,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:08,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:14:08,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863430356] [2023-11-12 02:14:08,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:08,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:14:08,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:08,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:14:08,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:14:08,068 INFO L87 Difference]: Start difference. First operand 123 states and 149 transitions. Second operand has 5 states, 4 states have (on average 9.5) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:08,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:08,132 INFO L93 Difference]: Finished difference Result 121 states and 145 transitions. [2023-11-12 02:14:08,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:14:08,132 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.5) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-11-12 02:14:08,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:08,133 INFO L225 Difference]: With dead ends: 121 [2023-11-12 02:14:08,134 INFO L226 Difference]: Without dead ends: 121 [2023-11-12 02:14:08,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:14:08,135 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 104 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:08,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 85 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:14:08,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-11-12 02:14:08,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2023-11-12 02:14:08,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 112 states have (on average 1.2946428571428572) internal successors, (145), 120 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:08,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 145 transitions. [2023-11-12 02:14:08,139 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 145 transitions. Word has length 44 [2023-11-12 02:14:08,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:08,140 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 145 transitions. [2023-11-12 02:14:08,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.5) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:08,140 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 145 transitions. [2023-11-12 02:14:08,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-12 02:14:08,141 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:08,141 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-12 02:14:08,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-11-12 02:14:08,141 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-12 02:14:08,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:08,142 INFO L85 PathProgramCache]: Analyzing trace with hash -432935566, now seen corresponding path program 1 times [2023-11-12 02:14:08,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:08,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241003271] [2023-11-12 02:14:08,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:08,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:08,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:08,453 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:14:08,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:08,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241003271] [2023-11-12 02:14:08,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241003271] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:08,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509723230] [2023-11-12 02:14:08,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:08,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:08,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:08,460 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:08,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-12 02:14:08,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:08,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-12 02:14:08,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:08,766 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:14:08,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:09,025 INFO L351 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 7 treesize of output 5 [2023-11-12 02:14:09,053 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:14:09,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509723230] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:14:09,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:14:09,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-12 02:14:09,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686521939] [2023-11-12 02:14:09,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:14:09,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-12 02:14:09,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:09,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-12 02:14:09,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:14:09,056 INFO L87 Difference]: Start difference. First operand 121 states and 145 transitions. Second operand has 19 states, 18 states have (on average 5.555555555555555) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:09,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:09,388 INFO L93 Difference]: Finished difference Result 143 states and 160 transitions. [2023-11-12 02:14:09,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:14:09,388 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 5.555555555555555) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-11-12 02:14:09,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:09,389 INFO L225 Difference]: With dead ends: 143 [2023-11-12 02:14:09,389 INFO L226 Difference]: Without dead ends: 143 [2023-11-12 02:14:09,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2023-11-12 02:14:09,391 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 223 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:09,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 336 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:14:09,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-11-12 02:14:09,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 121. [2023-11-12 02:14:09,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 113 states have (on average 1.2743362831858407) internal successors, (144), 120 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:09,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 144 transitions. [2023-11-12 02:14:09,394 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 144 transitions. Word has length 44 [2023-11-12 02:14:09,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:09,395 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 144 transitions. [2023-11-12 02:14:09,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 5.555555555555555) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:09,395 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 144 transitions. [2023-11-12 02:14:09,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-12 02:14:09,395 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:09,395 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-12 02:14:09,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:09,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-12 02:14:09,602 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-12 02:14:09,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:09,603 INFO L85 PathProgramCache]: Analyzing trace with hash 560750770, now seen corresponding path program 1 times [2023-11-12 02:14:09,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:09,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749450346] [2023-11-12 02:14:09,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:09,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:09,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:09,703 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 02:14:09,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:09,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749450346] [2023-11-12 02:14:09,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749450346] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:09,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:09,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:14:09,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101519511] [2023-11-12 02:14:09,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:09,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:14:09,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:09,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:14:09,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:14:09,706 INFO L87 Difference]: Start difference. First operand 121 states and 144 transitions. Second operand has 6 states, 5 states have (on average 8.0) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:09,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:09,780 INFO L93 Difference]: Finished difference Result 120 states and 142 transitions. [2023-11-12 02:14:09,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:14:09,781 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-11-12 02:14:09,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:09,782 INFO L225 Difference]: With dead ends: 120 [2023-11-12 02:14:09,782 INFO L226 Difference]: Without dead ends: 120 [2023-11-12 02:14:09,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:14:09,783 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 104 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:09,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 122 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:14:09,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-11-12 02:14:09,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2023-11-12 02:14:09,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 113 states have (on average 1.2566371681415929) internal successors, (142), 119 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:09,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 142 transitions. [2023-11-12 02:14:09,787 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 142 transitions. Word has length 46 [2023-11-12 02:14:09,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:09,787 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 142 transitions. [2023-11-12 02:14:09,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:09,787 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 142 transitions. [2023-11-12 02:14:09,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-12 02:14:09,788 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:09,788 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-12 02:14:09,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-11-12 02:14:09,789 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-12 02:14:09,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:09,789 INFO L85 PathProgramCache]: Analyzing trace with hash 560750771, now seen corresponding path program 1 times [2023-11-12 02:14:09,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:09,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171143724] [2023-11-12 02:14:09,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:09,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:09,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:10,172 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:14:10,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:10,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171143724] [2023-11-12 02:14:10,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171143724] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:10,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711576660] [2023-11-12 02:14:10,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:10,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:10,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:10,174 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:10,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-12 02:14:10,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:10,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-12 02:14:10,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:10,311 INFO L351 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 1 [2023-11-12 02:14:10,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:14:10,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:10,723 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:14:10,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711576660] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:14:10,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:14:10,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2023-11-12 02:14:10,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868269879] [2023-11-12 02:14:10,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:14:10,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-12 02:14:10,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:10,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-12 02:14:10,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2023-11-12 02:14:10,725 INFO L87 Difference]: Start difference. First operand 120 states and 142 transitions. Second operand has 22 states, 21 states have (on average 4.714285714285714) internal successors, (99), 22 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:11,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:11,100 INFO L93 Difference]: Finished difference Result 130 states and 154 transitions. [2023-11-12 02:14:11,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 02:14:11,101 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 4.714285714285714) internal successors, (99), 22 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-11-12 02:14:11,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:11,102 INFO L225 Difference]: With dead ends: 130 [2023-11-12 02:14:11,102 INFO L226 Difference]: Without dead ends: 130 [2023-11-12 02:14:11,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2023-11-12 02:14:11,103 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 285 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:11,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 410 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:14:11,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-11-12 02:14:11,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 125. [2023-11-12 02:14:11,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 118 states have (on average 1.2542372881355932) internal successors, (148), 124 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:11,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 148 transitions. [2023-11-12 02:14:11,106 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 148 transitions. Word has length 46 [2023-11-12 02:14:11,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:11,107 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 148 transitions. [2023-11-12 02:14:11,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 4.714285714285714) internal successors, (99), 22 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:11,107 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 148 transitions. [2023-11-12 02:14:11,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-12 02:14:11,108 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:11,108 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-12 02:14:11,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:11,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-12 02:14:11,314 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-12 02:14:11,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:11,315 INFO L85 PathProgramCache]: Analyzing trace with hash 2010581427, now seen corresponding path program 1 times [2023-11-12 02:14:11,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:11,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292180742] [2023-11-12 02:14:11,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:11,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:11,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:11,442 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 02:14:11,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:11,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292180742] [2023-11-12 02:14:11,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292180742] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:11,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:11,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:14:11,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796830617] [2023-11-12 02:14:11,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:11,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:14:11,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:11,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:14:11,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:14:11,446 INFO L87 Difference]: Start difference. First operand 125 states and 148 transitions. Second operand has 6 states, 5 states have (on average 8.4) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:11,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:11,529 INFO L93 Difference]: Finished difference Result 124 states and 146 transitions. [2023-11-12 02:14:11,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:14:11,530 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2023-11-12 02:14:11,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:11,531 INFO L225 Difference]: With dead ends: 124 [2023-11-12 02:14:11,531 INFO L226 Difference]: Without dead ends: 124 [2023-11-12 02:14:11,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:14:11,533 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 94 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:11,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 122 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:14:11,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-11-12 02:14:11,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2023-11-12 02:14:11,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 118 states have (on average 1.2372881355932204) internal successors, (146), 123 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:11,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 146 transitions. [2023-11-12 02:14:11,539 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 146 transitions. Word has length 48 [2023-11-12 02:14:11,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:11,540 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 146 transitions. [2023-11-12 02:14:11,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:11,540 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 146 transitions. [2023-11-12 02:14:11,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-12 02:14:11,541 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:11,541 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-12 02:14:11,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-11-12 02:14:11,541 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-12 02:14:11,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:11,542 INFO L85 PathProgramCache]: Analyzing trace with hash 2010581428, now seen corresponding path program 1 times [2023-11-12 02:14:11,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:11,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549913599] [2023-11-12 02:14:11,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:11,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:11,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:11,897 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:14:11,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:11,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549913599] [2023-11-12 02:14:11,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549913599] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:11,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928769470] [2023-11-12 02:14:11,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:11,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:11,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:11,899 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:11,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-12 02:14:12,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:12,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-12 02:14:12,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:12,125 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 02:14:12,125 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:12,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928769470] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:12,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:14:12,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 12 [2023-11-12 02:14:12,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217076981] [2023-11-12 02:14:12,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:12,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:14:12,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:12,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:14:12,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:14:12,128 INFO L87 Difference]: Start difference. First operand 124 states and 146 transitions. Second operand has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:12,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:12,239 INFO L93 Difference]: Finished difference Result 125 states and 146 transitions. [2023-11-12 02:14:12,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:14:12,240 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2023-11-12 02:14:12,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:12,241 INFO L225 Difference]: With dead ends: 125 [2023-11-12 02:14:12,241 INFO L226 Difference]: Without dead ends: 125 [2023-11-12 02:14:12,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2023-11-12 02:14:12,242 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 57 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:12,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 215 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:14:12,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-11-12 02:14:12,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2023-11-12 02:14:12,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.2203389830508475) internal successors, (144), 122 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:12,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 144 transitions. [2023-11-12 02:14:12,246 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 144 transitions. Word has length 48 [2023-11-12 02:14:12,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:12,246 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 144 transitions. [2023-11-12 02:14:12,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:12,246 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 144 transitions. [2023-11-12 02:14:12,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-12 02:14:12,247 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:12,247 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-11-12 02:14:12,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:12,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:12,454 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-11-12 02:14:12,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:12,454 INFO L85 PathProgramCache]: Analyzing trace with hash 837225827, now seen corresponding path program 3 times [2023-11-12 02:14:12,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:12,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540051881] [2023-11-12 02:14:12,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:12,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:12,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:13,437 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:14:13,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:13,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540051881] [2023-11-12 02:14:13,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540051881] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:13,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801185475] [2023-11-12 02:14:13,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:14:13,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:13,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:13,440 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:13,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0455ffb4-cb32-461a-ab35-ba2c9dc9b48e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-12 02:14:13,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 02:14:13,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:14:13,727 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-12 02:14:13,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:13,761 INFO L351 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 10 treesize of output 8 [2023-11-12 02:14:13,771 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-12 02:14:14,271 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2023-11-12 02:14:14,367 INFO L351 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 23 treesize of output 18 [2023-11-12 02:14:14,958 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 02:14:14,959 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2023-11-12 02:14:14,967 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:14:14,968 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:15,541 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:14:15,542 INFO L351 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2023-11-12 02:14:15,553 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:14:15,553 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 34 [2023-11-12 02:14:15,560 INFO L351 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 [2023-11-12 02:14:16,284 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 02:14:16,291 INFO L351 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 10 treesize of output 8 [2023-11-12 02:14:16,358 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:14:16,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801185475] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:14:16,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:14:16,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 40 [2023-11-12 02:14:16,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118681131] [2023-11-12 02:14:16,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:14:16,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-12 02:14:16,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:16,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-12 02:14:16,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1425, Unknown=1, NotChecked=0, Total=1560 [2023-11-12 02:14:16,361 INFO L87 Difference]: Start difference. First operand 123 states and 144 transitions. Second operand has 40 states, 40 states have (on average 2.95) internal successors, (118), 40 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)