./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB --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 e0283c4a072a13e5b82b0728b718582152e385c6ee1404b3ed9be4e37b84a0b2 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 04:16:55,853 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:16:55,957 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-28 04:16:55,963 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:16:55,964 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:16:55,994 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:16:55,996 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:16:55,997 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:16:55,997 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:16:55,998 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:16:55,998 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:16:55,999 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:16:55,999 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:16:55,999 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:16:55,999 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:16:56,000 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:16:56,000 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 04:16:56,000 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 04:16:56,000 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 04:16:56,000 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:16:56,000 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 04:16:56,000 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 04:16:56,000 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 04:16:56,000 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:16:56,000 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 04:16:56,000 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 04:16:56,000 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 04:16:56,000 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:16:56,000 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:16:56,001 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:16:56,001 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:16:56,001 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:16:56,001 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:16:56,001 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:16:56,001 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:16:56,001 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:16:56,001 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:16:56,001 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:16:56,001 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:16:56,001 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:16:56,001 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:16:56,002 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 04:16:56,002 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 04:16:56,002 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:16:56,002 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:16:56,002 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:16:56,002 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:16:56,002 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB 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 -> e0283c4a072a13e5b82b0728b718582152e385c6ee1404b3ed9be4e37b84a0b2 [2024-11-28 04:16:56,317 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:16:56,326 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:16:56,328 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:16:56,329 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:16:56,330 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:16:56,331 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-alloca-2.i [2024-11-28 04:16:59,371 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/data/aa48b4cf7/0eb8cc4353b84ceca2ec842b0ed27aa1/FLAG2b2da09b5 [2024-11-28 04:16:59,690 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:16:59,691 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-alloca-2.i [2024-11-28 04:16:59,702 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/data/aa48b4cf7/0eb8cc4353b84ceca2ec842b0ed27aa1/FLAG2b2da09b5 [2024-11-28 04:16:59,715 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/data/aa48b4cf7/0eb8cc4353b84ceca2ec842b0ed27aa1 [2024-11-28 04:16:59,718 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:16:59,719 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:16:59,720 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:16:59,721 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:16:59,725 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:16:59,726 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:16:59" (1/1) ... [2024-11-28 04:16:59,727 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35d858ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:16:59, skipping insertion in model container [2024-11-28 04:16:59,727 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:16:59" (1/1) ... [2024-11-28 04:16:59,757 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:17:00,026 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-28 04:17:00,027 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-28 04:17:00,037 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:17:00,048 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 04:17:00,085 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:17:00,115 INFO L204 MainTranslator]: Completed translation [2024-11-28 04:17:00,115 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:17:00 WrapperNode [2024-11-28 04:17:00,115 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:17:00,116 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 04:17:00,117 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 04:17:00,117 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 04:17:00,124 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:17:00" (1/1) ... [2024-11-28 04:17:00,134 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:17:00" (1/1) ... [2024-11-28 04:17:00,153 INFO L138 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 108 [2024-11-28 04:17:00,154 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 04:17:00,154 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 04:17:00,154 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 04:17:00,155 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 04:17:00,164 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:17:00" (1/1) ... [2024-11-28 04:17:00,164 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:17:00" (1/1) ... [2024-11-28 04:17:00,169 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:17:00" (1/1) ... [2024-11-28 04:17:00,187 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [5, 4]. 56 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 4 writes are split as follows [2, 2]. [2024-11-28 04:17:00,187 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:17:00" (1/1) ... [2024-11-28 04:17:00,187 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:17:00" (1/1) ... [2024-11-28 04:17:00,193 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:17:00" (1/1) ... [2024-11-28 04:17:00,194 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:17:00" (1/1) ... [2024-11-28 04:17:00,197 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:17:00" (1/1) ... [2024-11-28 04:17:00,198 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:17:00" (1/1) ... [2024-11-28 04:17:00,199 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:17:00" (1/1) ... [2024-11-28 04:17:00,201 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 04:17:00,202 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 04:17:00,202 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 04:17:00,202 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 04:17:00,203 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:17:00" (1/1) ... [2024-11-28 04:17:00,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:17:00,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:17:00,242 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 04:17:00,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 04:17:00,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 04:17:00,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 04:17:00,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 04:17:00,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 04:17:00,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-28 04:17:00,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 04:17:00,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 04:17:00,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 04:17:00,398 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 04:17:00,401 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 04:17:00,735 INFO L? ?]: Removed 65 outVars from TransFormulas that were not future-live. [2024-11-28 04:17:00,735 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 04:17:00,753 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 04:17:00,755 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-28 04:17:00,756 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:17:00 BoogieIcfgContainer [2024-11-28 04:17:00,756 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 04:17:00,759 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 04:17:00,760 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 04:17:00,765 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 04:17:00,765 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:16:59" (1/3) ... [2024-11-28 04:17:00,767 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@650d269c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:17:00, skipping insertion in model container [2024-11-28 04:17:00,767 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:17:00" (2/3) ... [2024-11-28 04:17:00,767 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@650d269c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:17:00, skipping insertion in model container [2024-11-28 04:17:00,768 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:17:00" (3/3) ... [2024-11-28 04:17:00,769 INFO L128 eAbstractionObserver]: Analyzing ICFG openbsd_cstrncmp-alloca-2.i [2024-11-28 04:17:00,786 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 04:17:00,789 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG openbsd_cstrncmp-alloca-2.i that has 1 procedures, 54 locations, 1 initial locations, 3 loop locations, and 19 error locations. [2024-11-28 04:17:00,839 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:17:00,856 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@67600540, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:17:00,857 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-11-28 04:17:00,861 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 53 states have internal predecessors, (64), 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) [2024-11-28 04:17:00,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-28 04:17:00,868 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:00,868 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:17:00,869 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:00,876 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:00,876 INFO L85 PathProgramCache]: Analyzing trace with hash 121325233, now seen corresponding path program 1 times [2024-11-28 04:17:00,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:00,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933918529] [2024-11-28 04:17:00,887 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:17:00,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:01,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:17:01,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:17:01,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:01,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933918529] [2024-11-28 04:17:01,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933918529] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:17:01,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:17:01,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:17:01,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147949113] [2024-11-28 04:17:01,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:17:01,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:17:01,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:01,296 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:17:01,297 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:17:01,299 INFO L87 Difference]: Start difference. First operand has 54 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 53 states have internal predecessors, (64), 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 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2024-11-28 04:17:01,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:01,380 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2024-11-28 04:17:01,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:17:01,382 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 8 [2024-11-28 04:17:01,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:01,390 INFO L225 Difference]: With dead ends: 67 [2024-11-28 04:17:01,390 INFO L226 Difference]: Without dead ends: 65 [2024-11-28 04:17:01,393 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:17:01,396 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 12 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:17:01,398 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 157 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:17:01,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-28 04:17:01,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2024-11-28 04:17:01,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.75) internal successors, (63), 54 states have internal predecessors, (63), 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) [2024-11-28 04:17:01,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2024-11-28 04:17:01,441 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 8 [2024-11-28 04:17:01,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:01,441 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2024-11-28 04:17:01,441 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2024-11-28 04:17:01,442 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2024-11-28 04:17:01,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-28 04:17:01,442 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:01,442 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:17:01,442 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 04:17:01,442 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:01,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:01,443 INFO L85 PathProgramCache]: Analyzing trace with hash 178583535, now seen corresponding path program 1 times [2024-11-28 04:17:01,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:01,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804054394] [2024-11-28 04:17:01,443 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:17:01,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:01,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:17:01,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:17:01,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:01,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804054394] [2024-11-28 04:17:01,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804054394] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:17:01,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:17:01,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:17:01,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980073581] [2024-11-28 04:17:01,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:17:01,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 04:17:01,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:01,631 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 04:17:01,632 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 04:17:01,632 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2024-11-28 04:17:01,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:01,687 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2024-11-28 04:17:01,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 04:17:01,688 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2024-11-28 04:17:01,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:01,688 INFO L225 Difference]: With dead ends: 53 [2024-11-28 04:17:01,688 INFO L226 Difference]: Without dead ends: 53 [2024-11-28 04:17:01,689 INFO L434 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 [2024-11-28 04:17:01,690 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 16 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:17:01,690 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 69 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:17:01,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-28 04:17:01,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-11-28 04:17:01,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 52 states have internal predecessors, (61), 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) [2024-11-28 04:17:01,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2024-11-28 04:17:01,695 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 8 [2024-11-28 04:17:01,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:01,695 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2024-11-28 04:17:01,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2024-11-28 04:17:01,696 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2024-11-28 04:17:01,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-28 04:17:01,696 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:01,696 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:17:01,697 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 04:17:01,697 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:01,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:01,697 INFO L85 PathProgramCache]: Analyzing trace with hash 178583536, now seen corresponding path program 1 times [2024-11-28 04:17:01,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:01,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009845523] [2024-11-28 04:17:01,698 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:17:01,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:01,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:17:02,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:17:02,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:02,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009845523] [2024-11-28 04:17:02,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009845523] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:17:02,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:17:02,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:17:02,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682105680] [2024-11-28 04:17:02,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:17:02,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:17:02,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:02,117 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:17:02,117 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:17:02,118 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 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) [2024-11-28 04:17:02,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:02,258 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2024-11-28 04:17:02,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:17:02,259 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 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 8 [2024-11-28 04:17:02,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:02,260 INFO L225 Difference]: With dead ends: 57 [2024-11-28 04:17:02,260 INFO L226 Difference]: Without dead ends: 57 [2024-11-28 04:17:02,260 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:17:02,261 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 25 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:17:02,262 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 121 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:17:02,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-28 04:17:02,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2024-11-28 04:17:02,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 39 states have (on average 1.6666666666666667) internal successors, (65), 55 states have internal predecessors, (65), 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) [2024-11-28 04:17:02,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2024-11-28 04:17:02,266 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 8 [2024-11-28 04:17:02,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:02,267 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2024-11-28 04:17:02,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 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) [2024-11-28 04:17:02,267 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2024-11-28 04:17:02,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-28 04:17:02,268 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:02,268 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:17:02,268 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 04:17:02,268 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:02,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:02,269 INFO L85 PathProgramCache]: Analyzing trace with hash 631530201, now seen corresponding path program 1 times [2024-11-28 04:17:02,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:02,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665474152] [2024-11-28 04:17:02,269 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:17:02,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:02,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:17:02,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:17:02,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:02,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665474152] [2024-11-28 04:17:02,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665474152] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:17:02,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:17:02,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:17:02,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591676550] [2024-11-28 04:17:02,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:17:02,355 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:17:02,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:02,356 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:17:02,356 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:17:02,356 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2024-11-28 04:17:02,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:02,384 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2024-11-28 04:17:02,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:17:02,384 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-28 04:17:02,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:02,385 INFO L225 Difference]: With dead ends: 74 [2024-11-28 04:17:02,385 INFO L226 Difference]: Without dead ends: 74 [2024-11-28 04:17:02,385 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:17:02,386 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 10 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:17:02,386 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 111 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:17:02,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-28 04:17:02,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2024-11-28 04:17:02,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 51 states have (on average 1.5686274509803921) internal successors, (80), 67 states have internal predecessors, (80), 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) [2024-11-28 04:17:02,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2024-11-28 04:17:02,392 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 10 [2024-11-28 04:17:02,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:02,393 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2024-11-28 04:17:02,393 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2024-11-28 04:17:02,393 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2024-11-28 04:17:02,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-28 04:17:02,393 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:02,394 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:17:02,394 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 04:17:02,394 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:02,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:02,394 INFO L85 PathProgramCache]: Analyzing trace with hash 631532380, now seen corresponding path program 1 times [2024-11-28 04:17:02,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:02,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413346589] [2024-11-28 04:17:02,395 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:17:02,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:02,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:17:02,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:17:02,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:02,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413346589] [2024-11-28 04:17:02,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413346589] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:17:02,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:17:02,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 04:17:02,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088725187] [2024-11-28 04:17:02,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:17:02,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:17:02,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:02,667 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:17:02,667 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:17:02,668 INFO L87 Difference]: Start difference. First operand 68 states and 80 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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) [2024-11-28 04:17:02,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:02,710 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2024-11-28 04:17:02,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:17:02,711 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-28 04:17:02,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:02,712 INFO L225 Difference]: With dead ends: 79 [2024-11-28 04:17:02,712 INFO L226 Difference]: Without dead ends: 79 [2024-11-28 04:17:02,712 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:17:02,713 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 13 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:17:02,713 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 103 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:17:02,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-28 04:17:02,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2024-11-28 04:17:02,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 60 states have (on average 1.5333333333333334) internal successors, (92), 76 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) [2024-11-28 04:17:02,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 92 transitions. [2024-11-28 04:17:02,726 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 92 transitions. Word has length 10 [2024-11-28 04:17:02,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:02,727 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 92 transitions. [2024-11-28 04:17:02,727 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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) [2024-11-28 04:17:02,727 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 92 transitions. [2024-11-28 04:17:02,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-28 04:17:02,730 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:02,730 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:17:02,730 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 04:17:02,730 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:02,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:02,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1888429733, now seen corresponding path program 1 times [2024-11-28 04:17:02,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:02,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382453623] [2024-11-28 04:17:02,731 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:17:02,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:02,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:17:02,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:17:02,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:02,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382453623] [2024-11-28 04:17:02,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382453623] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:17:02,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:17:02,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:17:02,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283660331] [2024-11-28 04:17:02,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:17:02,808 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 04:17:02,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:02,809 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 04:17:02,809 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 04:17:02,809 INFO L87 Difference]: Start difference. First operand 77 states and 92 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 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) [2024-11-28 04:17:02,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:02,868 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2024-11-28 04:17:02,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 04:17:02,870 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-28 04:17:02,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:02,870 INFO L225 Difference]: With dead ends: 75 [2024-11-28 04:17:02,870 INFO L226 Difference]: Without dead ends: 75 [2024-11-28 04:17:02,871 INFO L434 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 [2024-11-28 04:17:02,871 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 12 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:17:02,872 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 69 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:17:02,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-28 04:17:02,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-11-28 04:17:02,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 60 states have (on average 1.4833333333333334) internal successors, (89), 74 states have internal predecessors, (89), 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) [2024-11-28 04:17:02,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 89 transitions. [2024-11-28 04:17:02,877 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 89 transitions. Word has length 10 [2024-11-28 04:17:02,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:02,877 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 89 transitions. [2024-11-28 04:17:02,878 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 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) [2024-11-28 04:17:02,878 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 89 transitions. [2024-11-28 04:17:02,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-28 04:17:02,878 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:02,878 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:17:02,878 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-28 04:17:02,879 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:02,879 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:02,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1888429732, now seen corresponding path program 1 times [2024-11-28 04:17:02,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:02,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103275960] [2024-11-28 04:17:02,880 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:17:02,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:02,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:17:03,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:17:03,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:03,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103275960] [2024-11-28 04:17:03,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103275960] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:17:03,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:17:03,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:17:03,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405349455] [2024-11-28 04:17:03,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:17:03,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:17:03,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:03,121 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:17:03,121 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:17:03,121 INFO L87 Difference]: Start difference. First operand 75 states and 89 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 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) [2024-11-28 04:17:03,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:03,239 INFO L93 Difference]: Finished difference Result 83 states and 99 transitions. [2024-11-28 04:17:03,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:17:03,240 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-28 04:17:03,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:03,241 INFO L225 Difference]: With dead ends: 83 [2024-11-28 04:17:03,241 INFO L226 Difference]: Without dead ends: 83 [2024-11-28 04:17:03,241 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:17:03,242 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 24 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:17:03,242 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 126 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:17:03,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-28 04:17:03,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2024-11-28 04:17:03,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 66 states have (on average 1.4696969696969697) internal successors, (97), 80 states have internal predecessors, (97), 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) [2024-11-28 04:17:03,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 97 transitions. [2024-11-28 04:17:03,248 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 97 transitions. Word has length 10 [2024-11-28 04:17:03,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:03,248 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 97 transitions. [2024-11-28 04:17:03,249 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 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) [2024-11-28 04:17:03,249 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 97 transitions. [2024-11-28 04:17:03,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-28 04:17:03,249 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:03,250 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:17:03,250 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-28 04:17:03,250 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:03,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:03,251 INFO L85 PathProgramCache]: Analyzing trace with hash -177814246, now seen corresponding path program 1 times [2024-11-28 04:17:03,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:03,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232060206] [2024-11-28 04:17:03,251 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:17:03,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:03,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:17:03,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:17:03,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:03,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232060206] [2024-11-28 04:17:03,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232060206] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:17:03,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:17:03,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:17:03,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571587272] [2024-11-28 04:17:03,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:17:03,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:17:03,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:03,496 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:17:03,496 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:17:03,496 INFO L87 Difference]: Start difference. First operand 81 states and 97 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 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) [2024-11-28 04:17:03,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:03,595 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2024-11-28 04:17:03,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:17:03,595 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-28 04:17:03,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:03,596 INFO L225 Difference]: With dead ends: 96 [2024-11-28 04:17:03,596 INFO L226 Difference]: Without dead ends: 96 [2024-11-28 04:17:03,596 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:17:03,598 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 27 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:17:03,598 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 116 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:17:03,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-28 04:17:03,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2024-11-28 04:17:03,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 66 states have (on average 1.4696969696969697) internal successors, (97), 80 states have internal predecessors, (97), 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) [2024-11-28 04:17:03,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 97 transitions. [2024-11-28 04:17:03,610 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 97 transitions. Word has length 10 [2024-11-28 04:17:03,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:03,610 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 97 transitions. [2024-11-28 04:17:03,610 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 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) [2024-11-28 04:17:03,610 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 97 transitions. [2024-11-28 04:17:03,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-28 04:17:03,610 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:03,611 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:17:03,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-28 04:17:03,611 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:03,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:03,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1897332705, now seen corresponding path program 1 times [2024-11-28 04:17:03,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:03,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282024736] [2024-11-28 04:17:03,615 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:17:03,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:03,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:17:03,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:17:03,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:03,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282024736] [2024-11-28 04:17:03,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282024736] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:17:03,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:17:03,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 04:17:03,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946549311] [2024-11-28 04:17:03,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:17:03,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:17:03,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:03,796 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:17:03,796 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:17:03,796 INFO L87 Difference]: Start difference. First operand 81 states and 97 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 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) [2024-11-28 04:17:03,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:03,866 INFO L93 Difference]: Finished difference Result 88 states and 103 transitions. [2024-11-28 04:17:03,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:17:03,867 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 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 [2024-11-28 04:17:03,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:03,868 INFO L225 Difference]: With dead ends: 88 [2024-11-28 04:17:03,868 INFO L226 Difference]: Without dead ends: 88 [2024-11-28 04:17:03,868 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:17:03,869 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:17:03,870 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 125 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:17:03,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-28 04:17:03,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2024-11-28 04:17:03,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 71 states have (on average 1.4507042253521127) internal successors, (103), 85 states have internal predecessors, (103), 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) [2024-11-28 04:17:03,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 103 transitions. [2024-11-28 04:17:03,881 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 103 transitions. Word has length 11 [2024-11-28 04:17:03,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:03,881 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 103 transitions. [2024-11-28 04:17:03,881 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 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) [2024-11-28 04:17:03,881 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 103 transitions. [2024-11-28 04:17:03,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-28 04:17:03,882 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:03,882 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:17:03,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-28 04:17:03,882 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:03,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:03,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1588287965, now seen corresponding path program 1 times [2024-11-28 04:17:03,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:03,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351842878] [2024-11-28 04:17:03,885 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:17:03,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:03,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:17:04,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:17:04,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:04,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351842878] [2024-11-28 04:17:04,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351842878] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:17:04,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:17:04,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:17:04,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322942935] [2024-11-28 04:17:04,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:17:04,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:17:04,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:04,060 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:17:04,060 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:17:04,060 INFO L87 Difference]: Start difference. First operand 86 states and 103 transitions. Second operand has 5 states, 4 states have (on average 2.75) 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) [2024-11-28 04:17:04,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:04,116 INFO L93 Difference]: Finished difference Result 85 states and 102 transitions. [2024-11-28 04:17:04,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:17:04,117 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) 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 [2024-11-28 04:17:04,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:04,117 INFO L225 Difference]: With dead ends: 85 [2024-11-28 04:17:04,117 INFO L226 Difference]: Without dead ends: 85 [2024-11-28 04:17:04,117 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:17:04,118 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 12 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 128 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 [2024-11-28 04:17:04,119 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 128 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:17:04,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-28 04:17:04,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2024-11-28 04:17:04,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 79 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) [2024-11-28 04:17:04,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 96 transitions. [2024-11-28 04:17:04,128 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 96 transitions. Word has length 11 [2024-11-28 04:17:04,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:04,128 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 96 transitions. [2024-11-28 04:17:04,128 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) 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) [2024-11-28 04:17:04,128 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 96 transitions. [2024-11-28 04:17:04,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-28 04:17:04,129 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:04,129 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:17:04,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-28 04:17:04,133 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:04,134 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:04,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1099378263, now seen corresponding path program 1 times [2024-11-28 04:17:04,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:04,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989428469] [2024-11-28 04:17:04,134 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:17:04,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:04,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:17:04,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:17:04,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:04,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989428469] [2024-11-28 04:17:04,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989428469] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:17:04,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062737523] [2024-11-28 04:17:04,501 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:17:04,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:17:04,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:17:04,507 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:17:04,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 04:17:04,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:17:04,589 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 04:17:04,594 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:17:04,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:17:04,676 INFO L378 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 [2024-11-28 04:17:04,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-28 04:17:04,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:17:04,944 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:17:05,218 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 04:17:05,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:17:05,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062737523] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:17:05,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:17:05,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2024-11-28 04:17:05,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916107820] [2024-11-28 04:17:05,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:17:05,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 04:17:05,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:05,252 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 04:17:05,252 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-11-28 04:17:05,253 INFO L87 Difference]: Start difference. First operand 80 states and 96 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 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) [2024-11-28 04:17:05,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:05,540 INFO L93 Difference]: Finished difference Result 83 states and 100 transitions. [2024-11-28 04:17:05,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 04:17:05,540 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 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 12 [2024-11-28 04:17:05,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:05,541 INFO L225 Difference]: With dead ends: 83 [2024-11-28 04:17:05,541 INFO L226 Difference]: Without dead ends: 83 [2024-11-28 04:17:05,541 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2024-11-28 04:17:05,542 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 33 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:17:05,542 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 196 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:17:05,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-28 04:17:05,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 75. [2024-11-28 04:17:05,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 62 states have (on average 1.4516129032258065) internal successors, (90), 74 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) [2024-11-28 04:17:05,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2024-11-28 04:17:05,546 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 12 [2024-11-28 04:17:05,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:05,546 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2024-11-28 04:17:05,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 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) [2024-11-28 04:17:05,546 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2024-11-28 04:17:05,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 04:17:05,546 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:05,547 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:17:05,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 04:17:05,751 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:17:05,751 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:05,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:05,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1669001118, now seen corresponding path program 1 times [2024-11-28 04:17:05,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:05,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264662016] [2024-11-28 04:17:05,752 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:17:05,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:05,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:17:05,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:17:05,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:05,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264662016] [2024-11-28 04:17:05,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264662016] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:17:05,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:17:05,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 04:17:05,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008178736] [2024-11-28 04:17:05,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:17:05,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:17:05,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:05,816 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:17:05,816 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:17:05,816 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 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) [2024-11-28 04:17:05,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:05,877 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2024-11-28 04:17:05,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:17:05,878 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 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 14 [2024-11-28 04:17:05,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:05,878 INFO L225 Difference]: With dead ends: 74 [2024-11-28 04:17:05,878 INFO L226 Difference]: Without dead ends: 74 [2024-11-28 04:17:05,878 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:17:05,879 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 28 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:17:05,879 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 71 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:17:05,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-28 04:17:05,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2024-11-28 04:17:05,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 62 states have (on average 1.4193548387096775) internal successors, (88), 72 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) [2024-11-28 04:17:05,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2024-11-28 04:17:05,886 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 14 [2024-11-28 04:17:05,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:05,887 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2024-11-28 04:17:05,887 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 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) [2024-11-28 04:17:05,887 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2024-11-28 04:17:05,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 04:17:05,887 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:05,887 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:17:05,888 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-28 04:17:05,888 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:05,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:05,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1669001117, now seen corresponding path program 1 times [2024-11-28 04:17:05,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:05,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264306089] [2024-11-28 04:17:05,888 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:17:05,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:05,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:17:06,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:17:06,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:06,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264306089] [2024-11-28 04:17:06,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264306089] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:17:06,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:17:06,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:17:06,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328588383] [2024-11-28 04:17:06,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:17:06,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:17:06,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:06,030 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:17:06,030 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:17:06,030 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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) [2024-11-28 04:17:06,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:06,134 INFO L93 Difference]: Finished difference Result 86 states and 101 transitions. [2024-11-28 04:17:06,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 04:17:06,134 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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 14 [2024-11-28 04:17:06,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:06,135 INFO L225 Difference]: With dead ends: 86 [2024-11-28 04:17:06,135 INFO L226 Difference]: Without dead ends: 86 [2024-11-28 04:17:06,135 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:17:06,136 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 29 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:17:06,136 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 155 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:17:06,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-28 04:17:06,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2024-11-28 04:17:06,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 67 states have (on average 1.4328358208955223) internal successors, (96), 77 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) [2024-11-28 04:17:06,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 96 transitions. [2024-11-28 04:17:06,139 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 96 transitions. Word has length 14 [2024-11-28 04:17:06,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:06,140 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 96 transitions. [2024-11-28 04:17:06,140 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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) [2024-11-28 04:17:06,140 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 96 transitions. [2024-11-28 04:17:06,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 04:17:06,140 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:06,140 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:17:06,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-28 04:17:06,141 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:06,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:06,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1315344789, now seen corresponding path program 1 times [2024-11-28 04:17:06,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:06,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101429595] [2024-11-28 04:17:06,141 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:17:06,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:06,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:17:06,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:17:06,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:06,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101429595] [2024-11-28 04:17:06,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101429595] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:17:06,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155048039] [2024-11-28 04:17:06,508 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:17:06,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:17:06,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:17:06,510 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:17:06,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 04:17:06,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:17:06,578 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 04:17:06,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:17:06,615 INFO L378 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 [2024-11-28 04:17:06,626 INFO L378 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 8 treesize of output 1 [2024-11-28 04:17:06,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:17:06,896 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:17:07,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:17:07,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155048039] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:17:07,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:17:07,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2024-11-28 04:17:07,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427821005] [2024-11-28 04:17:07,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:17:07,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 04:17:07,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:07,196 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 04:17:07,198 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2024-11-28 04:17:07,198 INFO L87 Difference]: Start difference. First operand 78 states and 96 transitions. Second operand has 17 states, 16 states have (on average 2.3125) internal successors, (37), 17 states have internal predecessors, (37), 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) [2024-11-28 04:17:07,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:07,554 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2024-11-28 04:17:07,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 04:17:07,555 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 17 states have internal predecessors, (37), 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 14 [2024-11-28 04:17:07,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:07,556 INFO L225 Difference]: With dead ends: 81 [2024-11-28 04:17:07,557 INFO L226 Difference]: Without dead ends: 81 [2024-11-28 04:17:07,557 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2024-11-28 04:17:07,558 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 38 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:17:07,558 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 267 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:17:07,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-28 04:17:07,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2024-11-28 04:17:07,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 61 states have (on average 1.4098360655737705) internal successors, (86), 70 states have internal predecessors, (86), 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) [2024-11-28 04:17:07,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2024-11-28 04:17:07,562 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 14 [2024-11-28 04:17:07,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:07,562 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2024-11-28 04:17:07,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 17 states have internal predecessors, (37), 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) [2024-11-28 04:17:07,562 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2024-11-28 04:17:07,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 04:17:07,562 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:07,562 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:17:07,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 04:17:07,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:17:07,767 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:07,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:07,767 INFO L85 PathProgramCache]: Analyzing trace with hash 61543571, now seen corresponding path program 1 times [2024-11-28 04:17:07,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:07,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515427328] [2024-11-28 04:17:07,767 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:17:07,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:07,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:17:08,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:17:08,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:08,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515427328] [2024-11-28 04:17:08,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515427328] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:17:08,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:17:08,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 04:17:08,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169283858] [2024-11-28 04:17:08,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:17:08,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 04:17:08,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:08,054 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 04:17:08,054 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:17:08,054 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 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) [2024-11-28 04:17:08,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:08,126 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2024-11-28 04:17:08,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:17:08,127 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 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 14 [2024-11-28 04:17:08,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:08,128 INFO L225 Difference]: With dead ends: 70 [2024-11-28 04:17:08,128 INFO L226 Difference]: Without dead ends: 70 [2024-11-28 04:17:08,128 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:17:08,129 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 11 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:17:08,129 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 96 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:17:08,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-28 04:17:08,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 59. [2024-11-28 04:17:08,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 50 states have (on average 1.42) internal successors, (71), 58 states have internal predecessors, (71), 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) [2024-11-28 04:17:08,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2024-11-28 04:17:08,133 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 14 [2024-11-28 04:17:08,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:08,133 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2024-11-28 04:17:08,133 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 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) [2024-11-28 04:17:08,133 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2024-11-28 04:17:08,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-28 04:17:08,134 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:08,134 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:17:08,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-28 04:17:08,135 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:08,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:08,135 INFO L85 PathProgramCache]: Analyzing trace with hash -199427742, now seen corresponding path program 1 times [2024-11-28 04:17:08,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:08,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298485734] [2024-11-28 04:17:08,136 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:17:08,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:08,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:17:08,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:17:08,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:08,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298485734] [2024-11-28 04:17:08,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298485734] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:17:08,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:17:08,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 04:17:08,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891185858] [2024-11-28 04:17:08,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:17:08,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:17:08,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:08,326 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:17:08,326 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:17:08,326 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:17:08,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:08,367 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2024-11-28 04:17:08,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:17:08,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-28 04:17:08,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:08,368 INFO L225 Difference]: With dead ends: 58 [2024-11-28 04:17:08,368 INFO L226 Difference]: Without dead ends: 54 [2024-11-28 04:17:08,369 INFO L434 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 [2024-11-28 04:17:08,369 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 34 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:17:08,369 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 66 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:17:08,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-28 04:17:08,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-11-28 04:17:08,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 53 states have internal predecessors, (63), 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) [2024-11-28 04:17:08,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2024-11-28 04:17:08,373 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 15 [2024-11-28 04:17:08,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:08,373 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2024-11-28 04:17:08,374 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:17:08,374 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2024-11-28 04:17:08,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-28 04:17:08,376 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:08,376 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:17:08,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-28 04:17:08,376 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:08,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:08,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1887271709, now seen corresponding path program 1 times [2024-11-28 04:17:08,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:08,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837988583] [2024-11-28 04:17:08,377 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:17:08,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:08,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:17:08,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:17:08,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:08,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837988583] [2024-11-28 04:17:08,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837988583] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:17:08,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:17:08,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:17:08,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72523613] [2024-11-28 04:17:08,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:17:08,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:17:08,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:08,455 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:17:08,455 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:17:08,455 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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) [2024-11-28 04:17:08,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:08,513 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2024-11-28 04:17:08,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:17:08,514 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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 16 [2024-11-28 04:17:08,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:08,514 INFO L225 Difference]: With dead ends: 53 [2024-11-28 04:17:08,514 INFO L226 Difference]: Without dead ends: 53 [2024-11-28 04:17:08,514 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:17:08,515 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 25 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 76 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 [2024-11-28 04:17:08,517 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 76 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:17:08,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-28 04:17:08,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-11-28 04:17:08,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 46 states have (on average 1.326086956521739) internal successors, (61), 52 states have internal predecessors, (61), 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) [2024-11-28 04:17:08,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2024-11-28 04:17:08,520 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 16 [2024-11-28 04:17:08,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:08,520 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2024-11-28 04:17:08,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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) [2024-11-28 04:17:08,520 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2024-11-28 04:17:08,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-28 04:17:08,522 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:08,522 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:17:08,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-28 04:17:08,523 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:08,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:08,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1887271708, now seen corresponding path program 1 times [2024-11-28 04:17:08,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:08,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870049030] [2024-11-28 04:17:08,523 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:17:08,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:08,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:17:08,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:17:08,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:08,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870049030] [2024-11-28 04:17:08,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870049030] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:17:08,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:17:08,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 04:17:08,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578684956] [2024-11-28 04:17:08,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:17:08,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 04:17:08,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:08,780 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 04:17:08,780 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:17:08,780 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 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) [2024-11-28 04:17:08,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:08,887 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2024-11-28 04:17:08,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 04:17:08,888 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 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 16 [2024-11-28 04:17:08,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:08,889 INFO L225 Difference]: With dead ends: 59 [2024-11-28 04:17:08,889 INFO L226 Difference]: Without dead ends: 59 [2024-11-28 04:17:08,889 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:17:08,890 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 22 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:17:08,890 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 113 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:17:08,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-28 04:17:08,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2024-11-28 04:17:08,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 52 states have internal predecessors, (60), 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) [2024-11-28 04:17:08,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2024-11-28 04:17:08,893 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 16 [2024-11-28 04:17:08,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:08,893 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2024-11-28 04:17:08,893 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 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) [2024-11-28 04:17:08,893 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2024-11-28 04:17:08,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-28 04:17:08,894 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:08,894 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:17:08,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-28 04:17:08,896 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:08,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:08,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1191911644, now seen corresponding path program 1 times [2024-11-28 04:17:08,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:08,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107877621] [2024-11-28 04:17:08,897 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:17:08,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:08,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:17:08,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:17:08,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:08,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107877621] [2024-11-28 04:17:08,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107877621] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:17:08,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:17:08,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:17:08,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291874399] [2024-11-28 04:17:08,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:17:08,961 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:17:08,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:08,962 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:17:08,962 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:17:08,962 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 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) [2024-11-28 04:17:09,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:09,016 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2024-11-28 04:17:09,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:17:09,016 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 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 [2024-11-28 04:17:09,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:09,017 INFO L225 Difference]: With dead ends: 52 [2024-11-28 04:17:09,017 INFO L226 Difference]: Without dead ends: 52 [2024-11-28 04:17:09,017 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:17:09,017 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 18 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:17:09,018 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 75 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:17:09,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-28 04:17:09,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-11-28 04:17:09,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 51 states have internal predecessors, (59), 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) [2024-11-28 04:17:09,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2024-11-28 04:17:09,020 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 18 [2024-11-28 04:17:09,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:09,020 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2024-11-28 04:17:09,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 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) [2024-11-28 04:17:09,020 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2024-11-28 04:17:09,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-28 04:17:09,021 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:09,021 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:17:09,021 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-28 04:17:09,021 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:09,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:09,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1191911643, now seen corresponding path program 1 times [2024-11-28 04:17:09,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:09,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908507215] [2024-11-28 04:17:09,022 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:17:09,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:09,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:17:09,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:17:09,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:09,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908507215] [2024-11-28 04:17:09,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908507215] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:17:09,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:17:09,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 04:17:09,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781173762] [2024-11-28 04:17:09,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:17:09,201 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 04:17:09,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:09,202 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 04:17:09,202 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:17:09,202 INFO L87 Difference]: Start difference. First operand 52 states and 59 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) [2024-11-28 04:17:09,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:09,315 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2024-11-28 04:17:09,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 04:17:09,315 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 [2024-11-28 04:17:09,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:09,316 INFO L225 Difference]: With dead ends: 68 [2024-11-28 04:17:09,316 INFO L226 Difference]: Without dead ends: 68 [2024-11-28 04:17:09,316 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:17:09,317 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 21 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:17:09,317 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 135 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:17:09,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-28 04:17:09,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 53. [2024-11-28 04:17:09,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 52 states have internal predecessors, (60), 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) [2024-11-28 04:17:09,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2024-11-28 04:17:09,320 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 18 [2024-11-28 04:17:09,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:09,320 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2024-11-28 04:17:09,320 INFO L472 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) [2024-11-28 04:17:09,320 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2024-11-28 04:17:09,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-28 04:17:09,320 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:09,321 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:17:09,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-28 04:17:09,321 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:09,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:09,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1328872229, now seen corresponding path program 1 times [2024-11-28 04:17:09,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:09,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180528013] [2024-11-28 04:17:09,321 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:17:09,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:09,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:17:09,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:17:09,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:09,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180528013] [2024-11-28 04:17:09,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180528013] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:17:09,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:17:09,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:17:09,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309356949] [2024-11-28 04:17:09,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:17:09,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:17:09,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:09,408 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:17:09,408 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:17:09,408 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2024-11-28 04:17:09,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:09,450 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2024-11-28 04:17:09,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:17:09,450 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 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 20 [2024-11-28 04:17:09,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:09,451 INFO L225 Difference]: With dead ends: 52 [2024-11-28 04:17:09,451 INFO L226 Difference]: Without dead ends: 52 [2024-11-28 04:17:09,451 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:17:09,452 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 21 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:17:09,452 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 76 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:17:09,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-28 04:17:09,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-11-28 04:17:09,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 51 states have internal predecessors, (59), 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) [2024-11-28 04:17:09,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2024-11-28 04:17:09,454 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 20 [2024-11-28 04:17:09,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:09,455 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2024-11-28 04:17:09,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2024-11-28 04:17:09,455 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2024-11-28 04:17:09,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-28 04:17:09,457 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:09,457 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:17:09,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-28 04:17:09,458 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:09,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:09,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1328872230, now seen corresponding path program 1 times [2024-11-28 04:17:09,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:09,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674341191] [2024-11-28 04:17:09,458 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:17:09,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:09,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:17:09,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:17:09,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:09,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674341191] [2024-11-28 04:17:09,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674341191] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:17:09,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:17:09,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 04:17:09,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657978149] [2024-11-28 04:17:09,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:17:09,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 04:17:09,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:09,727 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 04:17:09,727 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-28 04:17:09,727 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 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) [2024-11-28 04:17:09,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:09,871 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2024-11-28 04:17:09,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 04:17:09,872 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 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 20 [2024-11-28 04:17:09,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:09,873 INFO L225 Difference]: With dead ends: 65 [2024-11-28 04:17:09,873 INFO L226 Difference]: Without dead ends: 62 [2024-11-28 04:17:09,873 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-28 04:17:09,875 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 28 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:17:09,875 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 137 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:17:09,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-28 04:17:09,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2024-11-28 04:17:09,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 50 states have internal predecessors, (57), 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) [2024-11-28 04:17:09,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2024-11-28 04:17:09,877 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 20 [2024-11-28 04:17:09,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:09,877 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2024-11-28 04:17:09,878 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 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) [2024-11-28 04:17:09,878 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2024-11-28 04:17:09,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-28 04:17:09,878 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:09,878 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:17:09,878 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-28 04:17:09,878 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:09,879 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:09,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1745086753, now seen corresponding path program 1 times [2024-11-28 04:17:09,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:09,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568389908] [2024-11-28 04:17:09,879 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:17:09,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:09,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:17:10,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:17:10,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:10,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568389908] [2024-11-28 04:17:10,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568389908] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:17:10,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:17:10,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 04:17:10,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663081053] [2024-11-28 04:17:10,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:17:10,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 04:17:10,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:10,110 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 04:17:10,110 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:17:10,110 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 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) [2024-11-28 04:17:10,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:10,165 INFO L93 Difference]: Finished difference Result 69 states and 75 transitions. [2024-11-28 04:17:10,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 04:17:10,166 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 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 [2024-11-28 04:17:10,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:10,166 INFO L225 Difference]: With dead ends: 69 [2024-11-28 04:17:10,166 INFO L226 Difference]: Without dead ends: 46 [2024-11-28 04:17:10,166 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:17:10,167 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 9 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:17:10,167 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 172 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:17:10,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-28 04:17:10,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-11-28 04:17:10,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 45 states have internal predecessors, (50), 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) [2024-11-28 04:17:10,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2024-11-28 04:17:10,169 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 21 [2024-11-28 04:17:10,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:10,169 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2024-11-28 04:17:10,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 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) [2024-11-28 04:17:10,169 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2024-11-28 04:17:10,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-28 04:17:10,170 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:10,170 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:17:10,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-28 04:17:10,170 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:10,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:10,170 INFO L85 PathProgramCache]: Analyzing trace with hash 860936801, now seen corresponding path program 1 times [2024-11-28 04:17:10,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:10,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693050426] [2024-11-28 04:17:10,171 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:17:10,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:10,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:17:10,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:17:10,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:10,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693050426] [2024-11-28 04:17:10,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693050426] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:17:10,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:17:10,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 04:17:10,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148891842] [2024-11-28 04:17:10,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:17:10,452 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 04:17:10,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:10,453 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 04:17:10,453 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-28 04:17:10,453 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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) [2024-11-28 04:17:10,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:10,528 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2024-11-28 04:17:10,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 04:17:10,529 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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 [2024-11-28 04:17:10,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:10,530 INFO L225 Difference]: With dead ends: 72 [2024-11-28 04:17:10,531 INFO L226 Difference]: Without dead ends: 54 [2024-11-28 04:17:10,531 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-28 04:17:10,531 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 25 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:17:10,532 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 175 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:17:10,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-28 04:17:10,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2024-11-28 04:17:10,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:17:10,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2024-11-28 04:17:10,535 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 21 [2024-11-28 04:17:10,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:10,536 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2024-11-28 04:17:10,536 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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) [2024-11-28 04:17:10,536 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2024-11-28 04:17:10,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-28 04:17:10,536 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:10,536 INFO L218 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] [2024-11-28 04:17:10,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-28 04:17:10,536 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:10,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:10,538 INFO L85 PathProgramCache]: Analyzing trace with hash -947104440, now seen corresponding path program 1 times [2024-11-28 04:17:10,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:10,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89500001] [2024-11-28 04:17:10,538 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:17:10,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:10,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:17:10,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:17:10,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:10,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89500001] [2024-11-28 04:17:10,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89500001] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:17:10,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210871488] [2024-11-28 04:17:10,769 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:17:10,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:17:10,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:17:10,771 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:17:10,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 04:17:10,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:17:10,874 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 04:17:10,877 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:17:11,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:17:11,012 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:17:11,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 04:17:11,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:17:11,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210871488] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:17:11,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:17:11,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2024-11-28 04:17:11,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472189225] [2024-11-28 04:17:11,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:17:11,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 04:17:11,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:11,211 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 04:17:11,211 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2024-11-28 04:17:11,211 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 18 states, 17 states have (on average 3.235294117647059) internal successors, (55), 18 states have internal predecessors, (55), 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) [2024-11-28 04:17:11,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:11,408 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2024-11-28 04:17:11,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 04:17:11,409 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.235294117647059) internal successors, (55), 18 states have internal predecessors, (55), 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 25 [2024-11-28 04:17:11,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:11,409 INFO L225 Difference]: With dead ends: 61 [2024-11-28 04:17:11,409 INFO L226 Difference]: Without dead ends: 61 [2024-11-28 04:17:11,410 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2024-11-28 04:17:11,410 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 25 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:17:11,411 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 194 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:17:11,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-28 04:17:11,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2024-11-28 04:17:11,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 46 states have (on average 1.173913043478261) internal successors, (54), 49 states have internal predecessors, (54), 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) [2024-11-28 04:17:11,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2024-11-28 04:17:11,413 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 25 [2024-11-28 04:17:11,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:11,413 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2024-11-28 04:17:11,413 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.235294117647059) internal successors, (55), 18 states have internal predecessors, (55), 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) [2024-11-28 04:17:11,413 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2024-11-28 04:17:11,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-28 04:17:11,413 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:11,414 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:17:11,428 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 04:17:11,614 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-28 04:17:11,614 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:11,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:11,615 INFO L85 PathProgramCache]: Analyzing trace with hash 365700233, now seen corresponding path program 1 times [2024-11-28 04:17:11,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:11,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242766415] [2024-11-28 04:17:11,615 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:17:11,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:11,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:17:12,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:17:12,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:12,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242766415] [2024-11-28 04:17:12,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242766415] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:17:12,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:17:12,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-28 04:17:12,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144276282] [2024-11-28 04:17:12,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:17:12,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 04:17:12,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:12,043 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 04:17:12,043 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-11-28 04:17:12,044 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 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) [2024-11-28 04:17:12,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:12,153 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2024-11-28 04:17:12,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 04:17:12,154 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 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 27 [2024-11-28 04:17:12,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:12,154 INFO L225 Difference]: With dead ends: 61 [2024-11-28 04:17:12,154 INFO L226 Difference]: Without dead ends: 42 [2024-11-28 04:17:12,154 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-11-28 04:17:12,155 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:17:12,155 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 201 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:17:12,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-28 04:17:12,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-11-28 04:17:12,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 41 states have internal predecessors, (44), 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) [2024-11-28 04:17:12,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2024-11-28 04:17:12,157 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 27 [2024-11-28 04:17:12,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:12,157 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2024-11-28 04:17:12,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 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) [2024-11-28 04:17:12,157 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2024-11-28 04:17:12,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-28 04:17:12,157 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:12,158 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:17:12,158 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-11-28 04:17:12,158 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:12,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:12,159 INFO L85 PathProgramCache]: Analyzing trace with hash 231686727, now seen corresponding path program 1 times [2024-11-28 04:17:12,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:12,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459945173] [2024-11-28 04:17:12,159 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:17:12,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:12,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:17:12,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:17:12,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:12,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459945173] [2024-11-28 04:17:12,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459945173] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:17:12,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:17:12,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-11-28 04:17:12,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706782752] [2024-11-28 04:17:12,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:17:12,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 04:17:12,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:12,632 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 04:17:12,632 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-11-28 04:17:12,632 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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) [2024-11-28 04:17:12,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:12,770 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2024-11-28 04:17:12,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 04:17:12,771 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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 27 [2024-11-28 04:17:12,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:12,771 INFO L225 Difference]: With dead ends: 57 [2024-11-28 04:17:12,771 INFO L226 Difference]: Without dead ends: 46 [2024-11-28 04:17:12,771 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-11-28 04:17:12,772 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 14 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:17:12,772 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 180 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:17:12,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-28 04:17:12,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2024-11-28 04:17:12,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 42 states have internal predecessors, (45), 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) [2024-11-28 04:17:12,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2024-11-28 04:17:12,774 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 27 [2024-11-28 04:17:12,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:12,774 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2024-11-28 04:17:12,774 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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) [2024-11-28 04:17:12,774 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2024-11-28 04:17:12,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-28 04:17:12,775 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:12,775 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:17:12,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-11-28 04:17:12,775 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:12,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:12,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1526484434, now seen corresponding path program 1 times [2024-11-28 04:17:12,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:12,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10759613] [2024-11-28 04:17:12,776 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:17:12,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:12,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:17:13,103 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:17:13,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:13,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10759613] [2024-11-28 04:17:13,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10759613] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:17:13,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952529866] [2024-11-28 04:17:13,104 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:17:13,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:17:13,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:17:13,106 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:17:13,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 04:17:13,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:17:13,206 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-28 04:17:13,208 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:17:13,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:17:13,354 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:17:13,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 04:17:13,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:17:13,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952529866] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:17:13,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:17:13,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2024-11-28 04:17:13,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258843080] [2024-11-28 04:17:13,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:17:13,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 04:17:13,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:13,574 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 04:17:13,575 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2024-11-28 04:17:13,575 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 21 states, 20 states have (on average 3.2) internal successors, (64), 21 states have internal predecessors, (64), 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) [2024-11-28 04:17:13,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:13,795 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2024-11-28 04:17:13,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 04:17:13,796 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.2) internal successors, (64), 21 states have internal predecessors, (64), 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 [2024-11-28 04:17:13,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:13,797 INFO L225 Difference]: With dead ends: 48 [2024-11-28 04:17:13,797 INFO L226 Difference]: Without dead ends: 48 [2024-11-28 04:17:13,797 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2024-11-28 04:17:13,798 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 7 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:17:13,798 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 209 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:17:13,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-28 04:17:13,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2024-11-28 04:17:13,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 41 states have (on average 1.146341463414634) internal successors, (47), 44 states have internal predecessors, (47), 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) [2024-11-28 04:17:13,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2024-11-28 04:17:13,800 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 31 [2024-11-28 04:17:13,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:13,800 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2024-11-28 04:17:13,800 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.2) internal successors, (64), 21 states have internal predecessors, (64), 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) [2024-11-28 04:17:13,800 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2024-11-28 04:17:13,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-28 04:17:13,801 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:13,801 INFO L218 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] [2024-11-28 04:17:13,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 04:17:14,001 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-28 04:17:14,001 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:14,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:14,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1927274991, now seen corresponding path program 1 times [2024-11-28 04:17:14,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:14,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861614501] [2024-11-28 04:17:14,002 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:17:14,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:14,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:17:14,113 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 04:17:14,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:14,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861614501] [2024-11-28 04:17:14,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861614501] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:17:14,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150098450] [2024-11-28 04:17:14,113 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:17:14,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:17:14,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:17:14,115 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:17:14,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 04:17:14,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:17:14,225 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-28 04:17:14,228 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:17:14,261 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2024-11-28 04:17:14,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 19 [2024-11-28 04:17:15,234 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:17:15,235 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:17:16,058 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:17:16,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150098450] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:17:16,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:17:16,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 16, 14] total 33 [2024-11-28 04:17:16,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763889545] [2024-11-28 04:17:16,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:17:16,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-28 04:17:16,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:16,060 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-28 04:17:16,061 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=956, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 04:17:16,061 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 34 states, 33 states have (on average 2.757575757575758) internal successors, (91), 34 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) [2024-11-28 04:17:16,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:16,989 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2024-11-28 04:17:16,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-28 04:17:16,990 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.757575757575758) internal successors, (91), 34 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 33 [2024-11-28 04:17:16,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:16,991 INFO L225 Difference]: With dead ends: 116 [2024-11-28 04:17:16,991 INFO L226 Difference]: Without dead ends: 116 [2024-11-28 04:17:16,992 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=289, Invalid=1781, Unknown=0, NotChecked=0, Total=2070 [2024-11-28 04:17:16,993 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 80 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:17:16,993 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 174 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 04:17:16,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-11-28 04:17:16,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 44. [2024-11-28 04:17:16,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 43 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) [2024-11-28 04:17:16,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2024-11-28 04:17:16,996 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 33 [2024-11-28 04:17:16,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:16,996 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2024-11-28 04:17:16,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.757575757575758) internal successors, (91), 34 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) [2024-11-28 04:17:16,996 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2024-11-28 04:17:16,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-28 04:17:16,997 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:16,997 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:17:17,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 04:17:17,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-28 04:17:17,201 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:17,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:17,202 INFO L85 PathProgramCache]: Analyzing trace with hash 980054896, now seen corresponding path program 1 times [2024-11-28 04:17:17,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:17,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845118509] [2024-11-28 04:17:17,202 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:17:17,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:17,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:17:17,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:17:17,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:17,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845118509] [2024-11-28 04:17:17,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845118509] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:17:17,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470965596] [2024-11-28 04:17:17,558 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:17:17,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:17:17,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:17:17,561 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:17:17,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 04:17:17,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:17:17,665 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-28 04:17:17,668 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:17:17,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:17:17,817 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:17:18,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 04:17:18,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:17:18,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470965596] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:17:18,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:17:18,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2024-11-28 04:17:18,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36022309] [2024-11-28 04:17:18,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:17:18,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 04:17:18,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:18,083 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 04:17:18,083 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2024-11-28 04:17:18,086 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 23 states, 22 states have (on average 3.272727272727273) internal successors, (72), 23 states have internal predecessors, (72), 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) [2024-11-28 04:17:18,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:18,371 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2024-11-28 04:17:18,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 04:17:18,371 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.272727272727273) internal successors, (72), 23 states have internal predecessors, (72), 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 [2024-11-28 04:17:18,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:18,372 INFO L225 Difference]: With dead ends: 57 [2024-11-28 04:17:18,372 INFO L226 Difference]: Without dead ends: 54 [2024-11-28 04:17:18,373 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2024-11-28 04:17:18,373 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 13 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:17:18,374 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 276 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:17:18,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-28 04:17:18,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2024-11-28 04:17:18,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.119047619047619) internal successors, (47), 44 states have internal predecessors, (47), 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) [2024-11-28 04:17:18,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2024-11-28 04:17:18,376 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 35 [2024-11-28 04:17:18,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:18,376 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2024-11-28 04:17:18,377 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.272727272727273) internal successors, (72), 23 states have internal predecessors, (72), 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) [2024-11-28 04:17:18,377 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2024-11-28 04:17:18,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-28 04:17:18,377 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:18,377 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:17:18,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 04:17:18,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:17:18,579 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:18,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:18,579 INFO L85 PathProgramCache]: Analyzing trace with hash 326477781, now seen corresponding path program 1 times [2024-11-28 04:17:18,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:18,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642956926] [2024-11-28 04:17:18,580 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:17:18,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:18,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:17:19,240 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:17:19,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:19,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642956926] [2024-11-28 04:17:19,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642956926] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:17:19,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100110918] [2024-11-28 04:17:19,240 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:17:19,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:17:19,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:17:19,243 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:17:19,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 04:17:19,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:17:19,351 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-28 04:17:19,353 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:17:19,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 04:17:19,537 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:17:19,537 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:17:19,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 04:17:19,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 04:17:19,662 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:17:19,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100110918] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:17:19,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:17:19,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 21 [2024-11-28 04:17:19,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5758544] [2024-11-28 04:17:19,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:17:19,664 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 04:17:19,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:19,664 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 04:17:19,665 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2024-11-28 04:17:19,665 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 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) [2024-11-28 04:17:19,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:19,844 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2024-11-28 04:17:19,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 04:17:19,845 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 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 36 [2024-11-28 04:17:19,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:19,845 INFO L225 Difference]: With dead ends: 76 [2024-11-28 04:17:19,845 INFO L226 Difference]: Without dead ends: 52 [2024-11-28 04:17:19,846 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-11-28 04:17:19,846 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 11 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:17:19,846 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 301 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:17:19,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-28 04:17:19,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2024-11-28 04:17:19,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 46 states have (on average 1.108695652173913) internal successors, (51), 48 states have internal predecessors, (51), 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) [2024-11-28 04:17:19,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2024-11-28 04:17:19,848 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 36 [2024-11-28 04:17:19,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:19,849 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2024-11-28 04:17:19,849 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 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) [2024-11-28 04:17:19,849 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2024-11-28 04:17:19,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-28 04:17:19,849 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:19,849 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-11-28 04:17:19,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-28 04:17:20,049 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:17:20,050 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:20,050 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:20,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1540772110, now seen corresponding path program 2 times [2024-11-28 04:17:20,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:20,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323511872] [2024-11-28 04:17:20,050 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:17:20,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:20,075 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:17:20,075 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:17:20,424 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:17:20,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:20,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323511872] [2024-11-28 04:17:20,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323511872] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:17:20,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508434001] [2024-11-28 04:17:20,425 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:17:20,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:17:20,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:17:20,427 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:17:20,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 04:17:20,538 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:17:20,538 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:17:20,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-28 04:17:20,542 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:17:20,734 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:17:20,735 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:17:20,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 04:17:21,008 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:17:21,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508434001] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:17:21,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:17:21,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2024-11-28 04:17:21,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764560280] [2024-11-28 04:17:21,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:17:21,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 04:17:21,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:21,011 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 04:17:21,011 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2024-11-28 04:17:21,011 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 21 states, 20 states have (on average 4.25) internal successors, (85), 21 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) [2024-11-28 04:17:21,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:21,240 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2024-11-28 04:17:21,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 04:17:21,240 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 4.25) internal successors, (85), 21 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 40 [2024-11-28 04:17:21,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:21,241 INFO L225 Difference]: With dead ends: 58 [2024-11-28 04:17:21,241 INFO L226 Difference]: Without dead ends: 58 [2024-11-28 04:17:21,241 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2024-11-28 04:17:21,242 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 12 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:17:21,242 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 220 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:17:21,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-28 04:17:21,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2024-11-28 04:17:21,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 50 states have (on average 1.1) internal successors, (55), 52 states have internal predecessors, (55), 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) [2024-11-28 04:17:21,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2024-11-28 04:17:21,246 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 40 [2024-11-28 04:17:21,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:21,246 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2024-11-28 04:17:21,246 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.25) internal successors, (85), 21 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) [2024-11-28 04:17:21,246 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2024-11-28 04:17:21,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-28 04:17:21,247 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:21,247 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:17:21,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-28 04:17:21,447 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:17:21,447 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:21,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:21,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1081719089, now seen corresponding path program 2 times [2024-11-28 04:17:21,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:21,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729383528] [2024-11-28 04:17:21,448 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:17:21,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:21,479 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:17:21,479 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:17:22,475 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:17:22,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:22,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729383528] [2024-11-28 04:17:22,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729383528] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:17:22,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006313757] [2024-11-28 04:17:22,476 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:17:22,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:17:22,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:17:22,478 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:17:22,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 04:17:22,593 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:17:22,594 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:17:22,596 INFO L256 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-11-28 04:17:22,599 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:17:22,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 04:17:22,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 04:17:22,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 04:17:23,745 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:17:23,745 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:17:24,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-11-28 04:17:24,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2024-11-28 04:17:24,563 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:17:24,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006313757] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:17:24,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:17:24,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 16] total 49 [2024-11-28 04:17:24,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137209386] [2024-11-28 04:17:24,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:17:24,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-28 04:17:24,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:24,566 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-28 04:17:24,567 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2168, Unknown=0, NotChecked=0, Total=2352 [2024-11-28 04:17:24,567 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 49 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) [2024-11-28 04:17:25,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:25,724 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2024-11-28 04:17:25,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 04:17:25,724 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 49 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 42 [2024-11-28 04:17:25,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:25,725 INFO L225 Difference]: With dead ends: 81 [2024-11-28 04:17:25,725 INFO L226 Difference]: Without dead ends: 63 [2024-11-28 04:17:25,727 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=298, Invalid=3608, Unknown=0, NotChecked=0, Total=3906 [2024-11-28 04:17:25,727 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 32 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:17:25,728 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 422 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 04:17:25,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-28 04:17:25,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2024-11-28 04:17:25,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 56 states have internal predecessors, (59), 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) [2024-11-28 04:17:25,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2024-11-28 04:17:25,729 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 42 [2024-11-28 04:17:25,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:25,730 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2024-11-28 04:17:25,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 49 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) [2024-11-28 04:17:25,730 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2024-11-28 04:17:25,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-28 04:17:25,730 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:25,730 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 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] [2024-11-28 04:17:25,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-28 04:17:25,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-28 04:17:25,931 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:25,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:25,932 INFO L85 PathProgramCache]: Analyzing trace with hash -373781496, now seen corresponding path program 3 times [2024-11-28 04:17:25,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:25,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996283743] [2024-11-28 04:17:25,932 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:17:25,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:25,964 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 04:17:25,964 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:17:26,386 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:17:26,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:26,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996283743] [2024-11-28 04:17:26,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996283743] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:17:26,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119110667] [2024-11-28 04:17:26,387 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:17:26,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:17:26,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:17:26,389 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:17:26,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 04:17:26,511 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 04:17:26,511 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:17:26,513 INFO L256 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-28 04:17:26,515 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:17:26,685 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:17:26,685 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:17:26,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-28 04:17:26,989 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:17:26,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119110667] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:17:26,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:17:26,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 24 [2024-11-28 04:17:26,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094593459] [2024-11-28 04:17:26,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:17:26,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 04:17:26,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:26,990 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 04:17:26,991 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2024-11-28 04:17:26,991 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 25 states, 24 states have (on average 3.6666666666666665) internal successors, (88), 25 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) [2024-11-28 04:17:27,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:27,283 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2024-11-28 04:17:27,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 04:17:27,283 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.6666666666666665) internal successors, (88), 25 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) Word has length 46 [2024-11-28 04:17:27,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:27,284 INFO L225 Difference]: With dead ends: 59 [2024-11-28 04:17:27,284 INFO L226 Difference]: Without dead ends: 59 [2024-11-28 04:17:27,285 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2024-11-28 04:17:27,285 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:17:27,286 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 259 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:17:27,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-28 04:17:27,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-11-28 04:17:27,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 58 states have internal predecessors, (61), 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) [2024-11-28 04:17:27,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2024-11-28 04:17:27,289 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 46 [2024-11-28 04:17:27,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:27,291 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2024-11-28 04:17:27,291 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.6666666666666665) internal successors, (88), 25 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) [2024-11-28 04:17:27,291 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2024-11-28 04:17:27,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-28 04:17:27,291 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:27,292 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 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] [2024-11-28 04:17:27,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 04:17:27,492 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-28 04:17:27,492 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:27,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:27,493 INFO L85 PathProgramCache]: Analyzing trace with hash 51040330, now seen corresponding path program 2 times [2024-11-28 04:17:27,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:27,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040447420] [2024-11-28 04:17:27,493 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:17:27,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:27,508 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 04:17:27,508 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:17:27,574 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-28 04:17:27,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:27,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040447420] [2024-11-28 04:17:27,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040447420] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:17:27,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:17:27,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:17:27,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122347850] [2024-11-28 04:17:27,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:17:27,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:17:27,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:27,576 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:17:27,576 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:17:27,576 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 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) [2024-11-28 04:17:27,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:27,619 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2024-11-28 04:17:27,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:17:27,620 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 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 50 [2024-11-28 04:17:27,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:27,620 INFO L225 Difference]: With dead ends: 58 [2024-11-28 04:17:27,620 INFO L226 Difference]: Without dead ends: 55 [2024-11-28 04:17:27,620 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:17:27,621 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 85 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 [2024-11-28 04:17:27,621 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 85 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:17:27,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-28 04:17:27,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-11-28 04:17:27,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 54 states have internal predecessors, (57), 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) [2024-11-28 04:17:27,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2024-11-28 04:17:27,623 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 50 [2024-11-28 04:17:27,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:27,624 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2024-11-28 04:17:27,624 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 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) [2024-11-28 04:17:27,624 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2024-11-28 04:17:27,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-28 04:17:27,624 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:27,624 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:17:27,625 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-11-28 04:17:27,625 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:27,625 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:27,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1591797307, now seen corresponding path program 3 times [2024-11-28 04:17:27,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:27,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007876927] [2024-11-28 04:17:27,626 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:17:27,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:27,660 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 04:17:27,660 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:17:28,123 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:17:28,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:28,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007876927] [2024-11-28 04:17:28,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007876927] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:17:28,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404910815] [2024-11-28 04:17:28,125 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:17:28,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:17:28,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:17:28,127 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:17:28,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 04:17:28,490 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 04:17:28,491 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:17:28,493 INFO L256 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-28 04:17:28,497 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:17:28,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 04:17:28,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-28 04:17:28,804 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:17:28,804 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:17:28,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2024-11-28 04:17:28,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 04:17:28,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 04:17:29,090 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:17:29,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404910815] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:17:29,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:17:29,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2024-11-28 04:17:29,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436408734] [2024-11-28 04:17:29,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:17:29,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 04:17:29,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:29,092 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 04:17:29,092 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2024-11-28 04:17:29,092 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 27 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 27 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) [2024-11-28 04:17:29,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:29,311 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2024-11-28 04:17:29,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 04:17:29,311 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 27 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) Word has length 51 [2024-11-28 04:17:29,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:29,312 INFO L225 Difference]: With dead ends: 97 [2024-11-28 04:17:29,312 INFO L226 Difference]: Without dead ends: 62 [2024-11-28 04:17:29,312 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2024-11-28 04:17:29,313 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 7 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:17:29,313 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 400 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:17:29,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-28 04:17:29,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2024-11-28 04:17:29,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 58 states have internal predecessors, (61), 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) [2024-11-28 04:17:29,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2024-11-28 04:17:29,316 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 51 [2024-11-28 04:17:29,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:29,316 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2024-11-28 04:17:29,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 27 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) [2024-11-28 04:17:29,316 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2024-11-28 04:17:29,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-28 04:17:29,316 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:29,317 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:17:29,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 04:17:29,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-28 04:17:29,517 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:29,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:29,518 INFO L85 PathProgramCache]: Analyzing trace with hash -814513182, now seen corresponding path program 4 times [2024-11-28 04:17:29,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:29,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011750532] [2024-11-28 04:17:29,518 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:17:29,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:29,549 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:17:29,549 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:17:29,927 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:17:29,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:29,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011750532] [2024-11-28 04:17:29,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011750532] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:17:29,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650121385] [2024-11-28 04:17:29,928 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:17:29,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:17:29,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:17:29,933 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:17:29,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 04:17:30,082 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:17:30,082 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:17:30,085 INFO L256 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-28 04:17:30,087 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:17:30,381 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:17:30,382 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:17:30,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-28 04:17:30,780 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:17:30,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650121385] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:17:30,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:17:30,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2024-11-28 04:17:30,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407142023] [2024-11-28 04:17:30,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:17:30,782 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 04:17:30,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:30,782 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 04:17:30,783 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2024-11-28 04:17:30,783 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 28 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 28 states have internal predecessors, (128), 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) [2024-11-28 04:17:31,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:31,084 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2024-11-28 04:17:31,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 04:17:31,085 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 28 states have internal predecessors, (128), 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 55 [2024-11-28 04:17:31,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:31,085 INFO L225 Difference]: With dead ends: 68 [2024-11-28 04:17:31,085 INFO L226 Difference]: Without dead ends: 68 [2024-11-28 04:17:31,086 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2024-11-28 04:17:31,086 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 19 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:17:31,086 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 326 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:17:31,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-28 04:17:31,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2024-11-28 04:17:31,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 62 states have (on average 1.064516129032258) internal successors, (66), 63 states have internal predecessors, (66), 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) [2024-11-28 04:17:31,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2024-11-28 04:17:31,089 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 55 [2024-11-28 04:17:31,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:31,089 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2024-11-28 04:17:31,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 28 states have internal predecessors, (128), 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) [2024-11-28 04:17:31,089 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2024-11-28 04:17:31,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-28 04:17:31,090 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:31,090 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:17:31,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 04:17:31,293 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-28 04:17:31,294 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:31,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:31,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1063119709, now seen corresponding path program 4 times [2024-11-28 04:17:31,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:31,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495317938] [2024-11-28 04:17:31,294 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:17:31,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:31,347 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:17:31,347 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:17:32,871 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:17:32,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:32,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495317938] [2024-11-28 04:17:32,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495317938] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:17:32,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649235058] [2024-11-28 04:17:32,871 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:17:32,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:17:32,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:17:32,873 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:17:32,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 04:17:33,039 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:17:33,039 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:17:33,042 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 93 conjuncts are in the unsatisfiable core [2024-11-28 04:17:33,045 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:17:33,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 04:17:33,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 04:17:33,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 04:17:34,623 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:17:34,623 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:17:35,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-11-28 04:17:35,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2024-11-28 04:17:35,871 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 04:17:35,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649235058] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:17:35,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:17:35,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 19] total 65 [2024-11-28 04:17:35,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848417535] [2024-11-28 04:17:35,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:17:35,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-28 04:17:35,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:35,873 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-28 04:17:35,874 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=3964, Unknown=0, NotChecked=0, Total=4160 [2024-11-28 04:17:35,874 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 65 states, 65 states have (on average 2.3076923076923075) internal successors, (150), 65 states have internal predecessors, (150), 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) [2024-11-28 04:17:38,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:38,245 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2024-11-28 04:17:38,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-28 04:17:38,245 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.3076923076923075) internal successors, (150), 65 states have internal predecessors, (150), 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 57 [2024-11-28 04:17:38,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:38,246 INFO L225 Difference]: With dead ends: 99 [2024-11-28 04:17:38,246 INFO L226 Difference]: Without dead ends: 74 [2024-11-28 04:17:38,248 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=384, Invalid=7448, Unknown=0, NotChecked=0, Total=7832 [2024-11-28 04:17:38,248 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 49 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 1644 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 1650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:17:38,249 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 658 Invalid, 1650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1644 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-28 04:17:38,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-28 04:17:38,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2024-11-28 04:17:38,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 67 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) [2024-11-28 04:17:38,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2024-11-28 04:17:38,251 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 57 [2024-11-28 04:17:38,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:38,251 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2024-11-28 04:17:38,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.3076923076923075) internal successors, (150), 65 states have internal predecessors, (150), 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) [2024-11-28 04:17:38,252 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2024-11-28 04:17:38,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-28 04:17:38,252 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:38,252 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:17:38,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-28 04:17:38,456 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-28 04:17:38,457 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:38,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:38,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1803012534, now seen corresponding path program 5 times [2024-11-28 04:17:38,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:38,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305653415] [2024-11-28 04:17:38,458 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:17:38,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:38,492 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-28 04:17:38,492 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:17:38,865 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 04:17:38,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:38,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305653415] [2024-11-28 04:17:38,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305653415] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:17:38,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774293238] [2024-11-28 04:17:38,866 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:17:38,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:17:38,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:17:38,868 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:17:38,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 04:17:39,013 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-28 04:17:39,013 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:17:39,015 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-28 04:17:39,017 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:17:39,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-28 04:17:39,244 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 04:17:39,244 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:17:39,718 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 04:17:39,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774293238] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:17:39,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:17:39,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2024-11-28 04:17:39,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484680369] [2024-11-28 04:17:39,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:17:39,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-28 04:17:39,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:39,719 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-28 04:17:39,720 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2024-11-28 04:17:39,720 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 32 states, 31 states have (on average 4.0) internal successors, (124), 32 states have internal predecessors, (124), 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) [2024-11-28 04:17:40,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:40,062 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2024-11-28 04:17:40,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 04:17:40,062 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 4.0) internal successors, (124), 32 states have internal predecessors, (124), 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 61 [2024-11-28 04:17:40,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:40,063 INFO L225 Difference]: With dead ends: 70 [2024-11-28 04:17:40,063 INFO L226 Difference]: Without dead ends: 70 [2024-11-28 04:17:40,063 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=172, Invalid=1160, Unknown=0, NotChecked=0, Total=1332 [2024-11-28 04:17:40,064 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 8 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:17:40,064 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 280 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:17:40,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-28 04:17:40,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2024-11-28 04:17:40,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 69 states have internal predecessors, (72), 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) [2024-11-28 04:17:40,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2024-11-28 04:17:40,067 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 61 [2024-11-28 04:17:40,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:40,067 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2024-11-28 04:17:40,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 4.0) internal successors, (124), 32 states have internal predecessors, (124), 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) [2024-11-28 04:17:40,067 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2024-11-28 04:17:40,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-28 04:17:40,068 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:40,068 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:17:40,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 04:17:40,268 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-28 04:17:40,268 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:40,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:40,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1511303879, now seen corresponding path program 5 times [2024-11-28 04:17:40,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:40,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147031136] [2024-11-28 04:17:40,269 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:17:40,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:40,308 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 04:17:40,308 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:17:40,968 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 04:17:40,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:40,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147031136] [2024-11-28 04:17:40,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147031136] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:17:40,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773944002] [2024-11-28 04:17:40,969 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:17:40,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:17:40,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:17:40,971 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:17:40,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 04:17:41,153 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 04:17:41,153 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:17:41,160 INFO L256 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-11-28 04:17:41,163 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:17:41,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 04:17:41,868 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 04:17:41,868 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:17:42,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 04:17:42,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 04:17:42,290 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 04:17:42,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773944002] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:17:42,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:17:42,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 15] total 45 [2024-11-28 04:17:42,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076015146] [2024-11-28 04:17:42,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:17:42,291 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-28 04:17:42,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:42,292 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-28 04:17:42,292 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1832, Unknown=0, NotChecked=0, Total=1980 [2024-11-28 04:17:42,293 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 45 states, 45 states have (on average 3.6222222222222222) internal successors, (163), 45 states have internal predecessors, (163), 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) [2024-11-28 04:17:43,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:43,202 INFO L93 Difference]: Finished difference Result 132 states and 135 transitions. [2024-11-28 04:17:43,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-28 04:17:43,203 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.6222222222222222) internal successors, (163), 45 states have internal predecessors, (163), 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 66 [2024-11-28 04:17:43,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:43,203 INFO L225 Difference]: With dead ends: 132 [2024-11-28 04:17:43,204 INFO L226 Difference]: Without dead ends: 86 [2024-11-28 04:17:43,204 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=241, Invalid=3181, Unknown=0, NotChecked=0, Total=3422 [2024-11-28 04:17:43,205 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 22 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:17:43,205 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 615 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1125 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 04:17:43,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-28 04:17:43,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2024-11-28 04:17:43,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 77 states have (on average 1.051948051948052) internal successors, (81), 78 states have internal predecessors, (81), 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) [2024-11-28 04:17:43,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2024-11-28 04:17:43,208 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 66 [2024-11-28 04:17:43,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:43,208 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2024-11-28 04:17:43,208 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.6222222222222222) internal successors, (163), 45 states have internal predecessors, (163), 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) [2024-11-28 04:17:43,208 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2024-11-28 04:17:43,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-28 04:17:43,209 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:43,209 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:17:43,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-28 04:17:43,409 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-28 04:17:43,409 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:43,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:43,410 INFO L85 PathProgramCache]: Analyzing trace with hash 284193139, now seen corresponding path program 6 times [2024-11-28 04:17:43,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:43,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703577850] [2024-11-28 04:17:43,410 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:17:43,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:43,460 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 04:17:43,460 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:17:44,517 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 54 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-28 04:17:44,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:44,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703577850] [2024-11-28 04:17:44,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703577850] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:17:44,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178990140] [2024-11-28 04:17:44,518 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:17:44,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:17:44,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:17:44,521 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:17:44,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 04:17:44,714 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 04:17:44,715 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:17:44,719 INFO L256 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 112 conjuncts are in the unsatisfiable core [2024-11-28 04:17:44,722 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:17:45,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 04:17:45,411 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:17:45,411 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:17:45,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-28 04:17:45,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 04:17:45,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 04:17:45,854 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 54 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-28 04:17:45,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178990140] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:17:45,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:17:45,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25, 18] total 48 [2024-11-28 04:17:45,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102744747] [2024-11-28 04:17:45,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:17:45,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-28 04:17:45,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:45,855 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-28 04:17:45,855 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2106, Unknown=0, NotChecked=0, Total=2256 [2024-11-28 04:17:45,856 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand has 48 states, 48 states have (on average 2.875) internal successors, (138), 48 states have internal predecessors, (138), 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) [2024-11-28 04:17:46,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:46,508 INFO L93 Difference]: Finished difference Result 118 states and 120 transitions. [2024-11-28 04:17:46,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-28 04:17:46,508 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.875) internal successors, (138), 48 states have internal predecessors, (138), 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 72 [2024-11-28 04:17:46,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:46,509 INFO L225 Difference]: With dead ends: 118 [2024-11-28 04:17:46,509 INFO L226 Difference]: Without dead ends: 86 [2024-11-28 04:17:46,510 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=188, Invalid=2674, Unknown=0, NotChecked=0, Total=2862 [2024-11-28 04:17:46,510 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 24 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:17:46,510 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 579 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 04:17:46,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-28 04:17:46,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2024-11-28 04:17:46,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 82 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) [2024-11-28 04:17:46,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2024-11-28 04:17:46,514 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 72 [2024-11-28 04:17:46,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:46,514 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2024-11-28 04:17:46,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.875) internal successors, (138), 48 states have internal predecessors, (138), 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) [2024-11-28 04:17:46,514 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2024-11-28 04:17:46,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-28 04:17:46,515 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:46,515 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:17:46,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-28 04:17:46,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:17:46,715 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:46,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:46,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1733774572, now seen corresponding path program 7 times [2024-11-28 04:17:46,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:46,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717675994] [2024-11-28 04:17:46,716 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:17:46,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:46,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:17:47,371 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 6 proven. 76 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-28 04:17:47,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:47,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717675994] [2024-11-28 04:17:47,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717675994] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:17:47,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599136441] [2024-11-28 04:17:47,371 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:17:47,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:17:47,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:17:47,374 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:17:47,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 04:17:47,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:17:47,531 INFO L256 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-28 04:17:47,533 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:17:47,767 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 15 proven. 67 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-28 04:17:47,768 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:17:48,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 04:17:48,159 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 15 proven. 67 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-28 04:17:48,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599136441] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:17:48,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:17:48,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 31 [2024-11-28 04:17:48,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952330251] [2024-11-28 04:17:48,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:17:48,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-28 04:17:48,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:48,161 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-28 04:17:48,161 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2024-11-28 04:17:48,162 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand has 32 states, 31 states have (on average 4.193548387096774) internal successors, (130), 32 states have internal predecessors, (130), 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) [2024-11-28 04:17:48,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:48,594 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2024-11-28 04:17:48,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 04:17:48,594 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 4.193548387096774) internal successors, (130), 32 states have internal predecessors, (130), 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 76 [2024-11-28 04:17:48,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:48,595 INFO L225 Difference]: With dead ends: 85 [2024-11-28 04:17:48,595 INFO L226 Difference]: Without dead ends: 85 [2024-11-28 04:17:48,595 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 130 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=158, Invalid=1174, Unknown=0, NotChecked=0, Total=1332 [2024-11-28 04:17:48,596 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 3 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:17:48,596 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 404 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:17:48,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-28 04:17:48,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2024-11-28 04:17:48,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 84 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) [2024-11-28 04:17:48,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2024-11-28 04:17:48,599 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 76 [2024-11-28 04:17:48,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:48,599 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2024-11-28 04:17:48,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 4.193548387096774) internal successors, (130), 32 states have internal predecessors, (130), 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) [2024-11-28 04:17:48,599 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2024-11-28 04:17:48,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-28 04:17:48,600 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:48,600 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:17:48,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-28 04:17:48,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-11-28 04:17:48,801 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:48,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:48,801 INFO L85 PathProgramCache]: Analyzing trace with hash -611642409, now seen corresponding path program 6 times [2024-11-28 04:17:48,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:48,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949041540] [2024-11-28 04:17:48,801 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:17:48,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:48,871 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-28 04:17:48,871 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:17:49,904 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 6 proven. 97 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-28 04:17:49,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:49,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949041540] [2024-11-28 04:17:49,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949041540] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:17:49,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23450235] [2024-11-28 04:17:49,904 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:17:49,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:17:49,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:17:49,907 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:17:49,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 04:17:50,157 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-28 04:17:50,157 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:17:50,160 INFO L256 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 119 conjuncts are in the unsatisfiable core [2024-11-28 04:17:50,163 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:17:50,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 04:17:50,977 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 9 proven. 94 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-28 04:17:50,977 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:17:51,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-28 04:17:51,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 04:17:51,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 04:17:51,730 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 9 proven. 94 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-28 04:17:51,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23450235] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:17:51,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:17:51,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 25, 20] total 57 [2024-11-28 04:17:51,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188028143] [2024-11-28 04:17:51,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:17:51,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-28 04:17:51,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:51,732 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-28 04:17:51,733 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=3022, Unknown=0, NotChecked=0, Total=3192 [2024-11-28 04:17:51,733 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand has 57 states, 57 states have (on average 3.43859649122807) internal successors, (196), 57 states have internal predecessors, (196), 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) [2024-11-28 04:17:54,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:54,387 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2024-11-28 04:17:54,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-28 04:17:54,388 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.43859649122807) internal successors, (196), 57 states have internal predecessors, (196), 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 81 [2024-11-28 04:17:54,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:54,389 INFO L225 Difference]: With dead ends: 140 [2024-11-28 04:17:54,389 INFO L226 Difference]: Without dead ends: 101 [2024-11-28 04:17:54,391 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1927 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=550, Invalid=8762, Unknown=0, NotChecked=0, Total=9312 [2024-11-28 04:17:54,393 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 78 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 1980 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 2002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 04:17:54,393 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 760 Invalid, 2002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1980 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 04:17:54,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-11-28 04:17:54,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 94. [2024-11-28 04:17:54,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 93 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) [2024-11-28 04:17:54,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2024-11-28 04:17:54,396 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 81 [2024-11-28 04:17:54,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:54,396 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2024-11-28 04:17:54,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.43859649122807) internal successors, (196), 57 states have internal predecessors, (196), 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) [2024-11-28 04:17:54,396 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2024-11-28 04:17:54,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-28 04:17:54,397 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:54,397 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:17:54,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-28 04:17:54,597 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-11-28 04:17:54,598 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:54,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:54,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1906382273, now seen corresponding path program 8 times [2024-11-28 04:17:54,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:54,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588332692] [2024-11-28 04:17:54,598 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:17:54,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:54,623 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:17:54,623 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:17:55,348 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 15 proven. 115 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-28 04:17:55,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:55,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588332692] [2024-11-28 04:17:55,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588332692] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:17:55,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175966427] [2024-11-28 04:17:55,348 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:17:55,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:17:55,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:17:55,351 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:17:55,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 04:17:55,530 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:17:55,530 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:17:55,535 INFO L256 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-28 04:17:55,538 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:17:55,881 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 28 proven. 102 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-28 04:17:55,882 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:17:56,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 04:17:56,364 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 28 proven. 102 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-28 04:17:56,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175966427] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:17:56,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:17:56,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 36 [2024-11-28 04:17:56,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638747148] [2024-11-28 04:17:56,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:17:56,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-28 04:17:56,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:56,366 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-28 04:17:56,366 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1183, Unknown=0, NotChecked=0, Total=1332 [2024-11-28 04:17:56,367 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand has 37 states, 36 states have (on average 4.277777777777778) internal successors, (154), 37 states have internal predecessors, (154), 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) [2024-11-28 04:17:56,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:17:56,868 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2024-11-28 04:17:56,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 04:17:56,869 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 4.277777777777778) internal successors, (154), 37 states have internal predecessors, (154), 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 87 [2024-11-28 04:17:56,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:17:56,869 INFO L225 Difference]: With dead ends: 96 [2024-11-28 04:17:56,869 INFO L226 Difference]: Without dead ends: 96 [2024-11-28 04:17:56,870 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 149 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=202, Invalid=1604, Unknown=0, NotChecked=0, Total=1806 [2024-11-28 04:17:56,870 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:17:56,870 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 465 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 04:17:56,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-28 04:17:56,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2024-11-28 04:17:56,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 95 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) [2024-11-28 04:17:56,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2024-11-28 04:17:56,873 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 87 [2024-11-28 04:17:56,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:17:56,873 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2024-11-28 04:17:56,873 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 4.277777777777778) internal successors, (154), 37 states have internal predecessors, (154), 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) [2024-11-28 04:17:56,873 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2024-11-28 04:17:56,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-28 04:17:56,874 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:17:56,874 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:17:56,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-28 04:17:57,077 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-11-28 04:17:57,078 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:17:57,078 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:17:57,078 INFO L85 PathProgramCache]: Analyzing trace with hash 2002768484, now seen corresponding path program 7 times [2024-11-28 04:17:57,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:17:57,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495807543] [2024-11-28 04:17:57,078 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:17:57,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:17:57,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:17:58,258 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 04:17:58,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:17:58,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495807543] [2024-11-28 04:17:58,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495807543] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:17:58,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843967304] [2024-11-28 04:17:58,258 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:17:58,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:17:58,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:17:58,261 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:17:58,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 04:17:58,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:17:58,456 INFO L256 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 126 conjuncts are in the unsatisfiable core [2024-11-28 04:17:58,459 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:17:58,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 04:17:59,173 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 11 proven. 145 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-28 04:17:59,173 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:17:59,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-28 04:17:59,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 04:17:59,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 04:17:59,513 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 11 proven. 145 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-28 04:17:59,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843967304] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:17:59,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:17:59,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22, 22] total 43 [2024-11-28 04:17:59,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353815903] [2024-11-28 04:17:59,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:17:59,514 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-28 04:17:59,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:17:59,515 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-28 04:17:59,515 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1708, Unknown=0, NotChecked=0, Total=1806 [2024-11-28 04:17:59,515 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand has 43 states, 43 states have (on average 3.744186046511628) internal successors, (161), 43 states have internal predecessors, (161), 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) [2024-11-28 04:18:02,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:18:02,234 INFO L93 Difference]: Finished difference Result 283 states and 287 transitions. [2024-11-28 04:18:02,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2024-11-28 04:18:02,235 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.744186046511628) internal successors, (161), 43 states have internal predecessors, (161), 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 92 [2024-11-28 04:18:02,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:18:02,235 INFO L225 Difference]: With dead ends: 283 [2024-11-28 04:18:02,235 INFO L226 Difference]: Without dead ends: 191 [2024-11-28 04:18:02,236 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1017 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=322, Invalid=6320, Unknown=0, NotChecked=0, Total=6642 [2024-11-28 04:18:02,236 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 50 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 2155 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 887 SdHoareTripleChecker+Invalid, 2173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:18:02,237 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 887 Invalid, 2173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2155 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-28 04:18:02,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2024-11-28 04:18:02,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 178. [2024-11-28 04:18:02,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 176 states have (on average 1.0340909090909092) internal successors, (182), 177 states have internal predecessors, (182), 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) [2024-11-28 04:18:02,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 182 transitions. [2024-11-28 04:18:02,239 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 182 transitions. Word has length 92 [2024-11-28 04:18:02,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:18:02,240 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 182 transitions. [2024-11-28 04:18:02,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.744186046511628) internal successors, (161), 43 states have internal predecessors, (161), 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) [2024-11-28 04:18:02,240 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 182 transitions. [2024-11-28 04:18:02,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-28 04:18:02,241 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:18:02,241 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:18:02,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-28 04:18:02,441 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:02,441 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:18:02,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:18:02,442 INFO L85 PathProgramCache]: Analyzing trace with hash -2077829794, now seen corresponding path program 9 times [2024-11-28 04:18:02,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:18:02,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252473661] [2024-11-28 04:18:02,442 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:18:02,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:18:02,514 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-28 04:18:02,514 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:18:03,553 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 28 proven. 161 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-28 04:18:03,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:18:03,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252473661] [2024-11-28 04:18:03,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252473661] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:18:03,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294104539] [2024-11-28 04:18:03,554 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:18:03,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:03,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:18:03,556 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:18:03,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-28 04:18:03,859 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-28 04:18:03,859 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:18:03,862 INFO L256 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-28 04:18:03,865 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:18:04,234 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 45 proven. 144 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-28 04:18:04,234 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:18:04,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-28 04:18:04,945 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 45 proven. 144 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-28 04:18:04,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294104539] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:18:04,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:18:04,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 18] total 41 [2024-11-28 04:18:04,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106653748] [2024-11-28 04:18:04,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:18:04,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-28 04:18:04,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:18:04,947 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-28 04:18:04,947 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1497, Unknown=0, NotChecked=0, Total=1722 [2024-11-28 04:18:04,948 INFO L87 Difference]: Start difference. First operand 178 states and 182 transitions. Second operand has 42 states, 41 states have (on average 4.341463414634147) internal successors, (178), 42 states have internal predecessors, (178), 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) [2024-11-28 04:18:05,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:18:05,517 INFO L93 Difference]: Finished difference Result 186 states and 190 transitions. [2024-11-28 04:18:05,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 04:18:05,517 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 4.341463414634147) internal successors, (178), 42 states have internal predecessors, (178), 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 98 [2024-11-28 04:18:05,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:18:05,518 INFO L225 Difference]: With dead ends: 186 [2024-11-28 04:18:05,518 INFO L226 Difference]: Without dead ends: 186 [2024-11-28 04:18:05,519 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 168 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=419, Invalid=2443, Unknown=0, NotChecked=0, Total=2862 [2024-11-28 04:18:05,519 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 5 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:18:05,519 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 279 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:18:05,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2024-11-28 04:18:05,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2024-11-28 04:18:05,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 183 states have (on average 1.0382513661202186) internal successors, (190), 184 states have internal predecessors, (190), 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) [2024-11-28 04:18:05,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 190 transitions. [2024-11-28 04:18:05,524 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 190 transitions. Word has length 98 [2024-11-28 04:18:05,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:18:05,524 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 190 transitions. [2024-11-28 04:18:05,524 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 4.341463414634147) internal successors, (178), 42 states have internal predecessors, (178), 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) [2024-11-28 04:18:05,525 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 190 transitions. [2024-11-28 04:18:05,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-11-28 04:18:05,525 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:18:05,526 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:18:05,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-28 04:18:05,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:05,726 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:18:05,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:18:05,727 INFO L85 PathProgramCache]: Analyzing trace with hash 278732054, now seen corresponding path program 8 times [2024-11-28 04:18:05,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:18:05,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478813126] [2024-11-28 04:18:05,727 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:18:05,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:18:05,777 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:18:05,778 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:18:06,550 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 11 proven. 145 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-28 04:18:06,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:18:06,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478813126] [2024-11-28 04:18:06,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478813126] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:18:06,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937716772] [2024-11-28 04:18:06,551 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:18:06,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:06,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:18:06,552 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:18:06,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 04:18:06,743 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:18:06,743 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:18:06,746 INFO L256 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-11-28 04:18:06,748 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:18:06,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 04:18:07,058 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 11 proven. 145 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-28 04:18:07,058 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:18:07,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 04:18:07,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 04:18:07,268 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 11 proven. 145 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-28 04:18:07,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937716772] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:18:07,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:18:07,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 31 [2024-11-28 04:18:07,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073679887] [2024-11-28 04:18:07,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:18:07,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-28 04:18:07,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:18:07,269 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-28 04:18:07,269 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=847, Unknown=0, NotChecked=0, Total=930 [2024-11-28 04:18:07,270 INFO L87 Difference]: Start difference. First operand 185 states and 190 transitions. Second operand has 31 states, 31 states have (on average 3.935483870967742) internal successors, (122), 31 states have internal predecessors, (122), 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) [2024-11-28 04:18:07,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:18:07,811 INFO L93 Difference]: Finished difference Result 264 states and 270 transitions. [2024-11-28 04:18:07,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 04:18:07,812 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.935483870967742) internal successors, (122), 31 states have internal predecessors, (122), 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 100 [2024-11-28 04:18:07,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:18:07,812 INFO L225 Difference]: With dead ends: 264 [2024-11-28 04:18:07,812 INFO L226 Difference]: Without dead ends: 192 [2024-11-28 04:18:07,813 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=1147, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 04:18:07,813 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 16 mSDsluCounter, 1270 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 1331 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:18:07,813 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 1331 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1026 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 04:18:07,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-11-28 04:18:07,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 189. [2024-11-28 04:18:07,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 187 states have (on average 1.0374331550802138) internal successors, (194), 188 states have internal predecessors, (194), 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) [2024-11-28 04:18:07,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 194 transitions. [2024-11-28 04:18:07,818 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 194 transitions. Word has length 100 [2024-11-28 04:18:07,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:18:07,818 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 194 transitions. [2024-11-28 04:18:07,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.935483870967742) internal successors, (122), 31 states have internal predecessors, (122), 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) [2024-11-28 04:18:07,819 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 194 transitions. [2024-11-28 04:18:07,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-28 04:18:07,820 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:18:07,820 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:18:07,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-28 04:18:08,020 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:08,020 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:18:08,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:18:08,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1035535013, now seen corresponding path program 9 times [2024-11-28 04:18:08,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:18:08,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990500493] [2024-11-28 04:18:08,021 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:18:08,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:18:08,089 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-28 04:18:08,089 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:18:09,303 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-28 04:18:09,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:18:09,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990500493] [2024-11-28 04:18:09,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990500493] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:18:09,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208285131] [2024-11-28 04:18:09,303 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:18:09,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:09,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:18:09,305 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:18:09,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-28 04:18:09,790 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-28 04:18:09,790 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:18:09,794 INFO L256 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-11-28 04:18:09,798 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:18:10,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 04:18:10,706 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 77 proven. 154 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-28 04:18:10,706 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:18:11,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 04:18:11,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 04:18:11,372 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 77 proven. 94 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-11-28 04:18:11,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208285131] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:18:11,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:18:11,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 17] total 53 [2024-11-28 04:18:11,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367989964] [2024-11-28 04:18:11,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:18:11,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-28 04:18:11,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:18:11,374 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-28 04:18:11,374 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2610, Unknown=0, NotChecked=0, Total=2756 [2024-11-28 04:18:11,374 INFO L87 Difference]: Start difference. First operand 189 states and 194 transitions. Second operand has 53 states, 53 states have (on average 4.377358490566038) internal successors, (232), 53 states have internal predecessors, (232), 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) [2024-11-28 04:18:13,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:18:13,254 INFO L93 Difference]: Finished difference Result 180 states and 184 transitions. [2024-11-28 04:18:13,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 04:18:13,255 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 4.377358490566038) internal successors, (232), 53 states have internal predecessors, (232), 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 103 [2024-11-28 04:18:13,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:18:13,255 INFO L225 Difference]: With dead ends: 180 [2024-11-28 04:18:13,255 INFO L226 Difference]: Without dead ends: 115 [2024-11-28 04:18:13,256 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=312, Invalid=5238, Unknown=0, NotChecked=0, Total=5550 [2024-11-28 04:18:13,256 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 14 mSDsluCounter, 1091 mSDsCounter, 0 mSdLazyCounter, 2033 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 2044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:18:13,257 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 1124 Invalid, 2044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2033 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-28 04:18:13,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-11-28 04:18:13,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2024-11-28 04:18:13,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 113 states have (on average 1.0442477876106195) internal successors, (118), 114 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) [2024-11-28 04:18:13,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 118 transitions. [2024-11-28 04:18:13,260 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 118 transitions. Word has length 103 [2024-11-28 04:18:13,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:18:13,260 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 118 transitions. [2024-11-28 04:18:13,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 4.377358490566038) internal successors, (232), 53 states have internal predecessors, (232), 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) [2024-11-28 04:18:13,260 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 118 transitions. [2024-11-28 04:18:13,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-28 04:18:13,261 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:18:13,261 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:18:13,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-28 04:18:13,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:13,462 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:18:13,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:18:13,462 INFO L85 PathProgramCache]: Analyzing trace with hash 249003599, now seen corresponding path program 10 times [2024-11-28 04:18:13,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:18:13,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629695640] [2024-11-28 04:18:13,462 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:18:13,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:18:13,497 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:18:13,497 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:18:14,124 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 45 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-28 04:18:14,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:18:14,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629695640] [2024-11-28 04:18:14,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629695640] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:18:14,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671679626] [2024-11-28 04:18:14,125 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:18:14,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:14,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:18:14,127 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:18:14,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-28 04:18:14,672 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:18:14,672 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:18:14,676 INFO L256 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-11-28 04:18:14,678 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:18:15,140 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 45 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-28 04:18:15,140 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:18:15,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-28 04:18:15,856 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 45 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-28 04:18:15,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671679626] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:18:15,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:18:15,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 41 [2024-11-28 04:18:15,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600444896] [2024-11-28 04:18:15,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:18:15,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-28 04:18:15,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:18:15,857 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-28 04:18:15,857 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1497, Unknown=0, NotChecked=0, Total=1722 [2024-11-28 04:18:15,857 INFO L87 Difference]: Start difference. First operand 115 states and 118 transitions. Second operand has 42 states, 41 states have (on average 5.024390243902439) internal successors, (206), 42 states have internal predecessors, (206), 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) [2024-11-28 04:18:16,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:18:16,258 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2024-11-28 04:18:16,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 04:18:16,259 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 5.024390243902439) internal successors, (206), 42 states have internal predecessors, (206), 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 104 [2024-11-28 04:18:16,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:18:16,259 INFO L225 Difference]: With dead ends: 116 [2024-11-28 04:18:16,259 INFO L226 Difference]: Without dead ends: 116 [2024-11-28 04:18:16,260 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=258, Invalid=1634, Unknown=0, NotChecked=0, Total=1892 [2024-11-28 04:18:16,260 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 12 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:18:16,260 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 526 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 04:18:16,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-11-28 04:18:16,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2024-11-28 04:18:16,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 113 states have (on average 1.0353982300884956) internal successors, (117), 114 states have internal predecessors, (117), 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) [2024-11-28 04:18:16,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2024-11-28 04:18:16,263 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 104 [2024-11-28 04:18:16,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:18:16,264 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2024-11-28 04:18:16,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 5.024390243902439) internal successors, (206), 42 states have internal predecessors, (206), 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) [2024-11-28 04:18:16,264 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2024-11-28 04:18:16,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-11-28 04:18:16,265 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:18:16,265 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:18:16,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-28 04:18:16,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:16,470 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:18:16,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:18:16,470 INFO L85 PathProgramCache]: Analyzing trace with hash -384145549, now seen corresponding path program 11 times [2024-11-28 04:18:16,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:18:16,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467396361] [2024-11-28 04:18:16,470 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:18:16,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:18:16,543 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-28 04:18:16,543 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:18:17,322 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 13 proven. 207 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-28 04:18:17,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:18:17,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467396361] [2024-11-28 04:18:17,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467396361] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:18:17,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499118029] [2024-11-28 04:18:17,322 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:18:17,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:17,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:18:17,324 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:18:17,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-28 04:18:17,752 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-28 04:18:17,753 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:18:17,757 INFO L256 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 102 conjuncts are in the unsatisfiable core [2024-11-28 04:18:17,759 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:18:18,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 04:18:18,773 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 13 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:18:18,773 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:18:18,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 04:18:18,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 04:18:18,980 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 13 proven. 207 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-28 04:18:18,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499118029] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:18:18,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:18:18,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 28, 21] total 48 [2024-11-28 04:18:18,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145386919] [2024-11-28 04:18:18,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:18:18,981 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-28 04:18:18,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:18:18,981 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-28 04:18:18,982 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2103, Unknown=0, NotChecked=0, Total=2256 [2024-11-28 04:18:18,982 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand has 48 states, 48 states have (on average 4.166666666666667) internal successors, (200), 48 states have internal predecessors, (200), 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) [2024-11-28 04:18:19,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:18:19,811 INFO L93 Difference]: Finished difference Result 204 states and 207 transitions. [2024-11-28 04:18:19,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-28 04:18:19,811 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.166666666666667) internal successors, (200), 48 states have internal predecessors, (200), 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 111 [2024-11-28 04:18:19,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:18:19,812 INFO L225 Difference]: With dead ends: 204 [2024-11-28 04:18:19,812 INFO L226 Difference]: Without dead ends: 122 [2024-11-28 04:18:19,812 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=178, Invalid=2578, Unknown=0, NotChecked=0, Total=2756 [2024-11-28 04:18:19,812 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 25 mSDsluCounter, 1237 mSDsCounter, 0 mSdLazyCounter, 1764 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 1770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 04:18:19,813 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 1287 Invalid, 1770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1764 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 04:18:19,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-11-28 04:18:19,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2024-11-28 04:18:19,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 117 states have (on average 1.0341880341880343) internal successors, (121), 118 states have internal predecessors, (121), 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) [2024-11-28 04:18:19,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2024-11-28 04:18:19,815 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 111 [2024-11-28 04:18:19,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:18:19,815 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2024-11-28 04:18:19,815 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.166666666666667) internal successors, (200), 48 states have internal predecessors, (200), 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) [2024-11-28 04:18:19,815 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2024-11-28 04:18:19,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-11-28 04:18:19,816 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:18:19,816 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:18:19,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-28 04:18:20,016 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:20,017 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:18:20,017 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:18:20,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1462290278, now seen corresponding path program 12 times [2024-11-28 04:18:20,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:18:20,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27111796] [2024-11-28 04:18:20,017 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:18:20,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:18:20,080 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-28 04:18:20,080 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:18:21,148 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 45 proven. 200 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-28 04:18:21,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:18:21,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27111796] [2024-11-28 04:18:21,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27111796] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:18:21,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284610160] [2024-11-28 04:18:21,149 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:18:21,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:21,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:18:21,151 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:18:21,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-28 04:18:21,816 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-28 04:18:21,817 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:18:21,821 INFO L256 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-28 04:18:21,822 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:18:22,138 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 66 proven. 179 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-28 04:18:22,138 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:18:22,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-28 04:18:22,761 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 66 proven. 179 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-28 04:18:22,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284610160] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:18:22,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:18:22,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 40 [2024-11-28 04:18:22,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525889026] [2024-11-28 04:18:22,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:18:22,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-28 04:18:22,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:18:22,763 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-28 04:18:22,763 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2024-11-28 04:18:22,763 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand has 41 states, 40 states have (on average 4.9) internal successors, (196), 41 states have internal predecessors, (196), 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) [2024-11-28 04:18:23,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:18:23,318 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2024-11-28 04:18:23,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 04:18:23,318 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 4.9) internal successors, (196), 41 states have internal predecessors, (196), 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 115 [2024-11-28 04:18:23,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:18:23,319 INFO L225 Difference]: With dead ends: 128 [2024-11-28 04:18:23,319 INFO L226 Difference]: Without dead ends: 128 [2024-11-28 04:18:23,319 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 200 SyntacticMatches, 8 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=476, Invalid=2494, Unknown=0, NotChecked=0, Total=2970 [2024-11-28 04:18:23,319 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 56 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:18:23,320 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 345 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:18:23,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-11-28 04:18:23,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2024-11-28 04:18:23,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 122 states have (on average 1.0327868852459017) internal successors, (126), 123 states have internal predecessors, (126), 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) [2024-11-28 04:18:23,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2024-11-28 04:18:23,323 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 115 [2024-11-28 04:18:23,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:18:23,323 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2024-11-28 04:18:23,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 4.9) internal successors, (196), 41 states have internal predecessors, (196), 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) [2024-11-28 04:18:23,323 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2024-11-28 04:18:23,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-11-28 04:18:23,324 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:18:23,324 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:18:23,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-28 04:18:23,525 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2024-11-28 04:18:23,525 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:18:23,525 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:18:23,525 INFO L85 PathProgramCache]: Analyzing trace with hash -806651045, now seen corresponding path program 10 times [2024-11-28 04:18:23,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:18:23,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231372627] [2024-11-28 04:18:23,526 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:18:23,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:18:23,610 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:18:23,611 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:18:25,457 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 27 proven. 298 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:18:25,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:18:25,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231372627] [2024-11-28 04:18:25,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231372627] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:18:25,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574643319] [2024-11-28 04:18:25,458 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:18:25,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:25,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:18:25,459 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:18:25,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-28 04:18:25,910 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:18:25,911 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:18:25,915 INFO L256 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 155 conjuncts are in the unsatisfiable core [2024-11-28 04:18:25,919 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:18:26,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 04:18:27,508 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 27 proven. 207 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-28 04:18:27,508 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:18:27,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-28 04:18:27,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 04:18:27,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 04:18:28,352 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 27 proven. 207 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-28 04:18:28,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574643319] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:18:28,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:18:28,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 31, 24] total 76 [2024-11-28 04:18:28,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222923696] [2024-11-28 04:18:28,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:18:28,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2024-11-28 04:18:28,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:18:28,354 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2024-11-28 04:18:28,354 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=5476, Unknown=0, NotChecked=0, Total=5700 [2024-11-28 04:18:28,355 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand has 76 states, 76 states have (on average 3.223684210526316) internal successors, (245), 76 states have internal predecessors, (245), 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) [2024-11-28 04:18:31,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:18:31,396 INFO L93 Difference]: Finished difference Result 187 states and 189 transitions. [2024-11-28 04:18:31,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-28 04:18:31,396 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.223684210526316) internal successors, (245), 76 states have internal predecessors, (245), 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 117 [2024-11-28 04:18:31,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:18:31,397 INFO L225 Difference]: With dead ends: 187 [2024-11-28 04:18:31,397 INFO L226 Difference]: Without dead ends: 134 [2024-11-28 04:18:31,398 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2040 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=446, Invalid=9856, Unknown=0, NotChecked=0, Total=10302 [2024-11-28 04:18:31,398 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 85 mSDsluCounter, 2025 mSDsCounter, 0 mSdLazyCounter, 4145 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 2068 SdHoareTripleChecker+Invalid, 4160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 4145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-28 04:18:31,398 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 2068 Invalid, 4160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 4145 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-28 04:18:31,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-11-28 04:18:31,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 128. [2024-11-28 04:18:31,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 126 states have (on average 1.0317460317460319) internal successors, (130), 127 states have internal predecessors, (130), 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) [2024-11-28 04:18:31,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2024-11-28 04:18:31,402 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 117 [2024-11-28 04:18:31,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:18:31,402 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2024-11-28 04:18:31,402 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.223684210526316) internal successors, (245), 76 states have internal predecessors, (245), 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) [2024-11-28 04:18:31,402 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2024-11-28 04:18:31,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-11-28 04:18:31,403 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:18:31,403 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:18:31,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-28 04:18:31,604 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:31,604 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:18:31,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:18:31,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1176481662, now seen corresponding path program 11 times [2024-11-28 04:18:31,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:18:31,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541766470] [2024-11-28 04:18:31,604 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:18:31,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:18:31,672 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-28 04:18:31,672 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:18:32,582 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 69 proven. 190 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-28 04:18:32,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:18:32,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541766470] [2024-11-28 04:18:32,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541766470] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:18:32,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617805741] [2024-11-28 04:18:32,583 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:18:32,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:32,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:18:32,588 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:18:32,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-28 04:18:32,950 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-28 04:18:32,950 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:18:32,955 INFO L256 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-11-28 04:18:32,957 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:18:32,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-28 04:18:33,461 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 66 proven. 193 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-28 04:18:33,462 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:18:34,519 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 66 proven. 193 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-28 04:18:34,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617805741] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:18:34,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:18:34,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 52 [2024-11-28 04:18:34,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848381583] [2024-11-28 04:18:34,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:18:34,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-28 04:18:34,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:18:34,521 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-28 04:18:34,521 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=2367, Unknown=0, NotChecked=0, Total=2756 [2024-11-28 04:18:34,521 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand has 53 states, 52 states have (on average 4.538461538461538) internal successors, (236), 53 states have internal predecessors, (236), 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) [2024-11-28 04:18:35,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:18:35,216 INFO L93 Difference]: Finished difference Result 130 states and 132 transitions. [2024-11-28 04:18:35,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-28 04:18:35,217 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 4.538461538461538) internal successors, (236), 53 states have internal predecessors, (236), 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 121 [2024-11-28 04:18:35,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:18:35,217 INFO L225 Difference]: With dead ends: 130 [2024-11-28 04:18:35,217 INFO L226 Difference]: Without dead ends: 130 [2024-11-28 04:18:35,218 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=476, Invalid=3184, Unknown=0, NotChecked=0, Total=3660 [2024-11-28 04:18:35,218 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:18:35,218 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 650 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 04:18:35,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-11-28 04:18:35,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2024-11-28 04:18:35,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 128 states have (on average 1.03125) internal successors, (132), 129 states have internal predecessors, (132), 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) [2024-11-28 04:18:35,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2024-11-28 04:18:35,221 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 121 [2024-11-28 04:18:35,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:18:35,221 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2024-11-28 04:18:35,222 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 4.538461538461538) internal successors, (236), 53 states have internal predecessors, (236), 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) [2024-11-28 04:18:35,222 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2024-11-28 04:18:35,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-11-28 04:18:35,223 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:18:35,223 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:18:35,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-11-28 04:18:35,423 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:35,423 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:18:35,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:18:35,424 INFO L85 PathProgramCache]: Analyzing trace with hash -719135231, now seen corresponding path program 13 times [2024-11-28 04:18:35,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:18:35,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699607024] [2024-11-28 04:18:35,424 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:18:35,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:18:35,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:18:36,643 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 15 proven. 280 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-28 04:18:36,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:18:36,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699607024] [2024-11-28 04:18:36,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699607024] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:18:36,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612293790] [2024-11-28 04:18:36,644 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:18:36,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:36,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:18:36,646 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:18:36,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-28 04:18:36,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:18:36,899 INFO L256 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-11-28 04:18:36,902 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:18:37,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 04:18:37,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-28 04:18:37,440 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 15 proven. 280 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-28 04:18:37,440 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:18:37,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2024-11-28 04:18:37,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 04:18:37,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 04:18:37,758 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 15 proven. 280 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-28 04:18:37,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612293790] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:18:37,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:18:37,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 40 [2024-11-28 04:18:37,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188033119] [2024-11-28 04:18:37,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:18:37,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-28 04:18:37,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:18:37,760 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-28 04:18:37,760 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1454, Unknown=0, NotChecked=0, Total=1560 [2024-11-28 04:18:37,760 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand has 40 states, 40 states have (on average 3.975) internal successors, (159), 40 states have internal predecessors, (159), 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) [2024-11-28 04:18:38,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:18:38,692 INFO L93 Difference]: Finished difference Result 227 states and 230 transitions. [2024-11-28 04:18:38,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-28 04:18:38,693 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.975) internal successors, (159), 40 states have internal predecessors, (159), 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 126 [2024-11-28 04:18:38,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:18:38,694 INFO L225 Difference]: With dead ends: 227 [2024-11-28 04:18:38,694 INFO L226 Difference]: Without dead ends: 137 [2024-11-28 04:18:38,694 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=150, Invalid=2106, Unknown=0, NotChecked=0, Total=2256 [2024-11-28 04:18:38,694 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 26 mSDsluCounter, 1481 mSDsCounter, 0 mSdLazyCounter, 1579 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 1534 SdHoareTripleChecker+Invalid, 1586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 04:18:38,694 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 1534 Invalid, 1586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1579 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 04:18:38,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-11-28 04:18:38,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 134. [2024-11-28 04:18:38,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 132 states have (on average 1.0303030303030303) internal successors, (136), 133 states have internal predecessors, (136), 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) [2024-11-28 04:18:38,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2024-11-28 04:18:38,698 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 126 [2024-11-28 04:18:38,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:18:38,699 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2024-11-28 04:18:38,699 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.975) internal successors, (159), 40 states have internal predecessors, (159), 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) [2024-11-28 04:18:38,699 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2024-11-28 04:18:38,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2024-11-28 04:18:38,700 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:18:38,700 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:18:38,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-28 04:18:38,901 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-11-28 04:18:38,901 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:18:38,901 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:18:38,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1723680262, now seen corresponding path program 14 times [2024-11-28 04:18:38,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:18:38,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244153390] [2024-11-28 04:18:38,902 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:18:38,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:18:38,971 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:18:38,971 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:18:39,887 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 66 proven. 258 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-28 04:18:39,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:18:39,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244153390] [2024-11-28 04:18:39,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244153390] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:18:39,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310861398] [2024-11-28 04:18:39,887 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:18:39,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:39,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:18:39,889 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:18:39,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-28 04:18:40,144 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:18:40,145 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:18:40,148 INFO L256 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-11-28 04:18:40,151 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:18:40,609 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 91 proven. 233 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-28 04:18:40,609 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:18:41,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 04:18:41,337 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 91 proven. 233 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-28 04:18:41,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310861398] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:18:41,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:18:41,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 43 [2024-11-28 04:18:41,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805929643] [2024-11-28 04:18:41,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:18:41,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-28 04:18:41,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:18:41,339 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-28 04:18:41,339 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1667, Unknown=0, NotChecked=0, Total=1892 [2024-11-28 04:18:41,339 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand has 44 states, 43 states have (on average 5.046511627906977) internal successors, (217), 44 states have internal predecessors, (217), 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) [2024-11-28 04:18:42,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:18:42,069 INFO L93 Difference]: Finished difference Result 143 states and 145 transitions. [2024-11-28 04:18:42,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 04:18:42,070 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 5.046511627906977) internal successors, (217), 44 states have internal predecessors, (217), 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 130 [2024-11-28 04:18:42,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:18:42,070 INFO L225 Difference]: With dead ends: 143 [2024-11-28 04:18:42,070 INFO L226 Difference]: Without dead ends: 143 [2024-11-28 04:18:42,071 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 227 SyntacticMatches, 9 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=257, Invalid=1813, Unknown=0, NotChecked=0, Total=2070 [2024-11-28 04:18:42,071 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 14 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 1492 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 941 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 04:18:42,071 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 941 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1492 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 04:18:42,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-11-28 04:18:42,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2024-11-28 04:18:42,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 137 states have (on average 1.0291970802919708) internal successors, (141), 138 states have internal predecessors, (141), 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) [2024-11-28 04:18:42,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2024-11-28 04:18:42,074 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 130 [2024-11-28 04:18:42,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:18:42,074 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2024-11-28 04:18:42,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 5.046511627906977) internal successors, (217), 44 states have internal predecessors, (217), 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) [2024-11-28 04:18:42,074 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2024-11-28 04:18:42,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-11-28 04:18:42,075 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:18:42,075 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:18:42,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-28 04:18:42,275 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:42,276 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:18:42,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:18:42,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1400644795, now seen corresponding path program 12 times [2024-11-28 04:18:42,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:18:42,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256233183] [2024-11-28 04:18:42,276 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:18:42,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:18:42,388 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-11-28 04:18:42,388 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:18:44,181 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 45 proven. 266 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-28 04:18:44,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:18:44,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256233183] [2024-11-28 04:18:44,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256233183] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:18:44,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475742031] [2024-11-28 04:18:44,182 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:18:44,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:18:44,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:18:44,183 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:18:44,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-28 04:18:44,903 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-11-28 04:18:44,903 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:18:44,909 INFO L256 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 195 conjuncts are in the unsatisfiable core [2024-11-28 04:18:44,913 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:18:45,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 04:18:45,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 04:18:45,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 04:18:48,184 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 31 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:18:48,184 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:18:50,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-11-28 04:18:50,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2024-11-28 04:18:51,381 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 31 proven. 280 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-28 04:18:51,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475742031] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:18:51,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:18:51,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 44, 34] total 102 [2024-11-28 04:18:51,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571387708] [2024-11-28 04:18:51,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:18:51,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2024-11-28 04:18:51,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:18:51,383 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2024-11-28 04:18:51,384 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=9946, Unknown=0, NotChecked=0, Total=10302 [2024-11-28 04:18:51,384 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand has 102 states, 102 states have (on average 3.2058823529411766) internal successors, (327), 102 states have internal predecessors, (327), 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) [2024-11-28 04:19:01,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:19:01,208 INFO L93 Difference]: Finished difference Result 211 states and 213 transitions. [2024-11-28 04:19:01,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2024-11-28 04:19:01,208 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 3.2058823529411766) internal successors, (327), 102 states have internal predecessors, (327), 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 132 [2024-11-28 04:19:01,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:19:01,209 INFO L225 Difference]: With dead ends: 211 [2024-11-28 04:19:01,209 INFO L226 Difference]: Without dead ends: 151 [2024-11-28 04:19:01,210 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6742 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=1392, Invalid=28364, Unknown=0, NotChecked=0, Total=29756 [2024-11-28 04:19:01,210 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 136 mSDsluCounter, 2300 mSDsCounter, 0 mSdLazyCounter, 6141 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 2339 SdHoareTripleChecker+Invalid, 6190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 6141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:19:01,210 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 2339 Invalid, 6190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 6141 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-11-28 04:19:01,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-11-28 04:19:01,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 145. [2024-11-28 04:19:01,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 143 states have (on average 1.027972027972028) internal successors, (147), 144 states have internal predecessors, (147), 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) [2024-11-28 04:19:01,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2024-11-28 04:19:01,213 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 132 [2024-11-28 04:19:01,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:19:01,213 INFO L471 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2024-11-28 04:19:01,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 3.2058823529411766) internal successors, (327), 102 states have internal predecessors, (327), 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) [2024-11-28 04:19:01,214 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2024-11-28 04:19:01,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2024-11-28 04:19:01,214 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:19:01,215 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:19:01,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-28 04:19:01,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2024-11-28 04:19:01,415 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:19:01,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:19:01,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1426710257, now seen corresponding path program 15 times [2024-11-28 04:19:01,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:19:01,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390660389] [2024-11-28 04:19:01,416 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:19:01,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:19:01,527 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-28 04:19:01,527 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:19:03,561 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 17 proven. 364 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-28 04:19:03,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:19:03,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390660389] [2024-11-28 04:19:03,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390660389] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:19:03,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138823255] [2024-11-28 04:19:03,562 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:19:03,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:19:03,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:19:03,566 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:19:03,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-28 04:19:04,779 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-28 04:19:04,779 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:19:04,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 166 conjuncts are in the unsatisfiable core [2024-11-28 04:19:04,789 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:19:05,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 04:19:06,903 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 17 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:19:06,903 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:19:07,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 04:19:07,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 04:19:08,291 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 17 proven. 393 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-28 04:19:08,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138823255] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:19:08,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:19:08,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 44, 27] total 88 [2024-11-28 04:19:08,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373391085] [2024-11-28 04:19:08,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:19:08,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2024-11-28 04:19:08,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:19:08,293 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2024-11-28 04:19:08,293 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=7337, Unknown=0, NotChecked=0, Total=7656 [2024-11-28 04:19:08,293 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand has 88 states, 88 states have (on average 3.625) internal successors, (319), 88 states have internal predecessors, (319), 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) [2024-11-28 04:19:10,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:19:10,894 INFO L93 Difference]: Finished difference Result 260 states and 264 transitions. [2024-11-28 04:19:10,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-11-28 04:19:10,895 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 3.625) internal successors, (319), 88 states have internal predecessors, (319), 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 141 [2024-11-28 04:19:10,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:19:10,895 INFO L225 Difference]: With dead ends: 260 [2024-11-28 04:19:10,895 INFO L226 Difference]: Without dead ends: 152 [2024-11-28 04:19:10,896 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=371, Invalid=9135, Unknown=0, NotChecked=0, Total=9506 [2024-11-28 04:19:10,896 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 27 mSDsluCounter, 2294 mSDsCounter, 0 mSdLazyCounter, 5010 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 2343 SdHoareTripleChecker+Invalid, 5019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 5010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:19:10,896 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 2343 Invalid, 5019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 5010 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-28 04:19:10,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2024-11-28 04:19:10,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 149. [2024-11-28 04:19:10,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 147 states have (on average 1.0272108843537415) internal successors, (151), 148 states have internal predecessors, (151), 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) [2024-11-28 04:19:10,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2024-11-28 04:19:10,900 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 141 [2024-11-28 04:19:10,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:19:10,900 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2024-11-28 04:19:10,900 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 3.625) internal successors, (319), 88 states have internal predecessors, (319), 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) [2024-11-28 04:19:10,900 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2024-11-28 04:19:10,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-11-28 04:19:10,901 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:19:10,901 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:19:10,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-28 04:19:11,101 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-11-28 04:19:11,102 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:19:11,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:19:11,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1957016566, now seen corresponding path program 16 times [2024-11-28 04:19:11,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:19:11,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774238246] [2024-11-28 04:19:11,102 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:19:11,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:19:11,144 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:19:11,144 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:19:11,903 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 120 proven. 294 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-28 04:19:11,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:19:11,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774238246] [2024-11-28 04:19:11,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774238246] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:19:11,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754245382] [2024-11-28 04:19:11,904 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:19:11,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:19:11,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:19:11,905 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:19:11,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-28 04:19:12,604 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:19:12,604 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:19:12,610 INFO L256 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 214 conjuncts are in the unsatisfiable core [2024-11-28 04:19:12,614 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:19:12,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 04:19:13,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 04:19:13,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 04:19:15,842 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 17 proven. 517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:19:15,842 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:19:17,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-11-28 04:19:17,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2024-11-28 04:19:19,424 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 17 proven. 364 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-28 04:19:19,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754245382] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:19:19,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:19:19,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 48, 37] total 104 [2024-11-28 04:19:19,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631474906] [2024-11-28 04:19:19,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:19:19,425 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2024-11-28 04:19:19,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:19:19,426 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2024-11-28 04:19:19,426 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=10323, Unknown=0, NotChecked=0, Total=10712 [2024-11-28 04:19:19,427 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand has 104 states, 104 states have (on average 3.5) internal successors, (364), 104 states have internal predecessors, (364), 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) [2024-11-28 04:19:25,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:19:25,439 INFO L93 Difference]: Finished difference Result 235 states and 237 transitions. [2024-11-28 04:19:25,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-11-28 04:19:25,439 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 3.5) internal successors, (364), 104 states have internal predecessors, (364), 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 145 [2024-11-28 04:19:25,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:19:25,440 INFO L225 Difference]: With dead ends: 235 [2024-11-28 04:19:25,440 INFO L226 Difference]: Without dead ends: 168 [2024-11-28 04:19:25,441 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4275 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=617, Invalid=18289, Unknown=0, NotChecked=0, Total=18906 [2024-11-28 04:19:25,441 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 37 mSDsluCounter, 2552 mSDsCounter, 0 mSdLazyCounter, 6867 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2598 SdHoareTripleChecker+Invalid, 6876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 6867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:19:25,441 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2598 Invalid, 6876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 6867 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2024-11-28 04:19:25,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-11-28 04:19:25,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 158. [2024-11-28 04:19:25,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 156 states have (on average 1.0256410256410255) internal successors, (160), 157 states have internal predecessors, (160), 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) [2024-11-28 04:19:25,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2024-11-28 04:19:25,444 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 145 [2024-11-28 04:19:25,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:19:25,444 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2024-11-28 04:19:25,444 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 3.5) internal successors, (364), 104 states have internal predecessors, (364), 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) [2024-11-28 04:19:25,444 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2024-11-28 04:19:25,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2024-11-28 04:19:25,445 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:19:25,445 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:19:25,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-28 04:19:25,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-11-28 04:19:25,645 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:19:25,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:19:25,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1332582754, now seen corresponding path program 13 times [2024-11-28 04:19:25,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:19:25,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851358758] [2024-11-28 04:19:25,646 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:19:25,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:19:25,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:19:26,700 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 91 proven. 341 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-28 04:19:26,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:19:26,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851358758] [2024-11-28 04:19:26,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851358758] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:19:26,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721466580] [2024-11-28 04:19:26,700 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:19:26,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:19:26,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:19:26,704 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:19:26,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-28 04:19:26,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:19:26,990 INFO L256 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-11-28 04:19:26,992 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:19:27,515 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 120 proven. 312 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-28 04:19:27,515 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:19:28,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 04:19:28,353 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 120 proven. 312 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-28 04:19:28,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721466580] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:19:28,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:19:28,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 51 [2024-11-28 04:19:28,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777625952] [2024-11-28 04:19:28,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:19:28,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-28 04:19:28,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:19:28,355 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-28 04:19:28,355 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=2354, Unknown=0, NotChecked=0, Total=2652 [2024-11-28 04:19:28,355 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand has 52 states, 51 states have (on average 4.705882352941177) internal successors, (240), 52 states have internal predecessors, (240), 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) [2024-11-28 04:19:29,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:19:29,405 INFO L93 Difference]: Finished difference Result 160 states and 162 transitions. [2024-11-28 04:19:29,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-28 04:19:29,405 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 4.705882352941177) internal successors, (240), 52 states have internal predecessors, (240), 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 151 [2024-11-28 04:19:29,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:19:29,406 INFO L225 Difference]: With dead ends: 160 [2024-11-28 04:19:29,406 INFO L226 Difference]: Without dead ends: 160 [2024-11-28 04:19:29,407 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 265 SyntacticMatches, 10 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1546 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=404, Invalid=3378, Unknown=0, NotChecked=0, Total=3782 [2024-11-28 04:19:29,407 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 1735 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 1735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 04:19:29,407 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1040 Invalid, 1735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1735 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 04:19:29,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-11-28 04:19:29,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2024-11-28 04:19:29,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 158 states have (on average 1.0253164556962024) internal successors, (162), 159 states have internal predecessors, (162), 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) [2024-11-28 04:19:29,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2024-11-28 04:19:29,410 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 151 [2024-11-28 04:19:29,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:19:29,411 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2024-11-28 04:19:29,411 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 4.705882352941177) internal successors, (240), 52 states have internal predecessors, (240), 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) [2024-11-28 04:19:29,411 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2024-11-28 04:19:29,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2024-11-28 04:19:29,412 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:19:29,412 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:19:29,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-11-28 04:19:29,612 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-11-28 04:19:29,613 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:19:29,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:19:29,613 INFO L85 PathProgramCache]: Analyzing trace with hash -132761243, now seen corresponding path program 17 times [2024-11-28 04:19:29,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:19:29,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336694193] [2024-11-28 04:19:29,613 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:19:29,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:19:29,728 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-11-28 04:19:29,728 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:19:30,937 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 19 proven. 459 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-28 04:19:30,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:19:30,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336694193] [2024-11-28 04:19:30,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336694193] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:19:30,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815047658] [2024-11-28 04:19:30,938 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:19:30,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:19:30,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:19:30,939 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:19:30,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-28 04:19:31,549 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-11-28 04:19:31,549 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:19:31,555 INFO L256 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 123 conjuncts are in the unsatisfiable core [2024-11-28 04:19:31,559 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:19:32,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 04:19:32,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-28 04:19:32,825 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 19 proven. 459 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-28 04:19:32,825 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:19:32,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2024-11-28 04:19:33,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 04:19:33,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 04:19:33,690 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 19 proven. 459 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-28 04:19:33,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815047658] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:19:33,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:19:33,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 68 [2024-11-28 04:19:33,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171655175] [2024-11-28 04:19:33,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:19:33,691 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-11-28 04:19:33,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:19:33,692 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-11-28 04:19:33,692 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=4367, Unknown=0, NotChecked=0, Total=4556 [2024-11-28 04:19:33,692 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand has 68 states, 68 states have (on average 4.338235294117647) internal successors, (295), 68 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:19:35,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:19:35,239 INFO L93 Difference]: Finished difference Result 279 states and 282 transitions. [2024-11-28 04:19:35,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-28 04:19:35,239 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 4.338235294117647) internal successors, (295), 68 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2024-11-28 04:19:35,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:19:35,240 INFO L225 Difference]: With dead ends: 279 [2024-11-28 04:19:35,240 INFO L226 Difference]: Without dead ends: 167 [2024-11-28 04:19:35,240 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=242, Invalid=5610, Unknown=0, NotChecked=0, Total=5852 [2024-11-28 04:19:35,241 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 21 mSDsluCounter, 2855 mSDsCounter, 0 mSdLazyCounter, 3117 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 2919 SdHoareTripleChecker+Invalid, 3126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 3117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:19:35,241 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 2919 Invalid, 3126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 3117 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-28 04:19:35,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-11-28 04:19:35,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 164. [2024-11-28 04:19:35,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 162 states have (on average 1.0246913580246915) internal successors, (166), 163 states have internal predecessors, (166), 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) [2024-11-28 04:19:35,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2024-11-28 04:19:35,244 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 156 [2024-11-28 04:19:35,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:19:35,244 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2024-11-28 04:19:35,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 4.338235294117647) internal successors, (295), 68 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:19:35,244 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2024-11-28 04:19:35,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2024-11-28 04:19:35,249 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:19:35,249 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:19:35,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-28 04:19:35,449 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-11-28 04:19:35,449 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:19:35,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:19:35,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1974442910, now seen corresponding path program 18 times [2024-11-28 04:19:35,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:19:35,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657140133] [2024-11-28 04:19:35,450 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:19:35,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:19:35,551 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-11-28 04:19:35,551 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:19:36,606 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 120 proven. 395 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-28 04:19:36,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:19:36,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657140133] [2024-11-28 04:19:36,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657140133] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:19:36,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396811736] [2024-11-28 04:19:36,607 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:19:36,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:19:36,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:19:36,608 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:19:36,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-28 04:19:38,018 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-11-28 04:19:38,018 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:19:38,025 INFO L256 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-11-28 04:19:38,028 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:19:38,475 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 153 proven. 362 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-28 04:19:38,475 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:19:39,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-28 04:19:39,373 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 153 proven. 362 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-28 04:19:39,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396811736] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:19:39,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:19:39,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 52 [2024-11-28 04:19:39,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389313325] [2024-11-28 04:19:39,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:19:39,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-28 04:19:39,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:19:39,374 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-28 04:19:39,375 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=2340, Unknown=0, NotChecked=0, Total=2756 [2024-11-28 04:19:39,375 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand has 53 states, 52 states have (on average 5.038461538461538) internal successors, (262), 53 states have internal predecessors, (262), 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) [2024-11-28 04:19:40,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:19:40,149 INFO L93 Difference]: Finished difference Result 173 states and 175 transitions. [2024-11-28 04:19:40,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-28 04:19:40,150 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 5.038461538461538) internal successors, (262), 53 states have internal predecessors, (262), 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 160 [2024-11-28 04:19:40,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:19:40,150 INFO L225 Difference]: With dead ends: 173 [2024-11-28 04:19:40,150 INFO L226 Difference]: Without dead ends: 173 [2024-11-28 04:19:40,151 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 281 SyntacticMatches, 11 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2275 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=860, Invalid=4396, Unknown=0, NotChecked=0, Total=5256 [2024-11-28 04:19:40,151 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 40 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:19:40,151 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 340 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:19:40,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-11-28 04:19:40,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 169. [2024-11-28 04:19:40,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 167 states have (on average 1.0239520958083832) internal successors, (171), 168 states have internal predecessors, (171), 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) [2024-11-28 04:19:40,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2024-11-28 04:19:40,153 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 160 [2024-11-28 04:19:40,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:19:40,153 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2024-11-28 04:19:40,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 5.038461538461538) internal successors, (262), 53 states have internal predecessors, (262), 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) [2024-11-28 04:19:40,153 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2024-11-28 04:19:40,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2024-11-28 04:19:40,154 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:19:40,154 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:19:40,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-11-28 04:19:40,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:19:40,355 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:19:40,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:19:40,355 INFO L85 PathProgramCache]: Analyzing trace with hash -935908001, now seen corresponding path program 14 times [2024-11-28 04:19:40,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:19:40,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995940779] [2024-11-28 04:19:40,355 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:19:40,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:19:40,422 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:19:40,422 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:19:42,312 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 39 proven. 459 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-28 04:19:42,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:19:42,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995940779] [2024-11-28 04:19:42,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995940779] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:19:42,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165231010] [2024-11-28 04:19:42,312 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:19:42,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:19:42,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:19:42,314 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:19:42,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-28 04:19:42,628 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:19:42,628 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:19:42,633 INFO L256 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 231 conjuncts are in the unsatisfiable core [2024-11-28 04:19:42,637 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:19:42,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-28 04:19:43,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-28 04:19:43,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 04:19:49,328 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 39 proven. 649 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:19:49,328 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:19:51,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-11-28 04:19:51,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2024-11-28 04:19:52,866 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 39 proven. 459 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-28 04:19:52,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165231010] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:19:52,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:19:52,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 52, 40] total 119 [2024-11-28 04:19:52,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43304305] [2024-11-28 04:19:52,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:19:52,867 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2024-11-28 04:19:52,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:19:52,868 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2024-11-28 04:19:52,870 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=13625, Unknown=9, NotChecked=0, Total=14042 [2024-11-28 04:19:52,870 INFO L87 Difference]: Start difference. First operand 169 states and 171 transitions. Second operand has 119 states, 119 states have (on average 3.319327731092437) internal successors, (395), 119 states have internal predecessors, (395), 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) [2024-11-28 04:20:01,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:20:09,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:20:26,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:20:30,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:20:34,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:20:35,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:20:35,516 INFO L93 Difference]: Finished difference Result 253 states and 255 transitions. [2024-11-28 04:20:35,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-11-28 04:20:35,516 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 3.319327731092437) internal successors, (395), 119 states have internal predecessors, (395), 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 162 [2024-11-28 04:20:35,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:20:35,517 INFO L225 Difference]: With dead ends: 253 [2024-11-28 04:20:35,517 INFO L226 Difference]: Without dead ends: 179 [2024-11-28 04:20:35,519 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6269 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=707, Invalid=24088, Unknown=11, NotChecked=0, Total=24806 [2024-11-28 04:20:35,519 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 54 mSDsluCounter, 3186 mSDsCounter, 0 mSdLazyCounter, 8505 mSolverCounterSat, 9 mSolverCounterUnsat, 25 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 3233 SdHoareTripleChecker+Invalid, 8539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 8505 IncrementalHoareTripleChecker+Invalid, 25 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:20:35,519 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 3233 Invalid, 8539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 8505 Invalid, 25 Unknown, 0 Unchecked, 32.1s Time] [2024-11-28 04:20:35,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2024-11-28 04:20:35,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 173. [2024-11-28 04:20:35,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 171 states have (on average 1.023391812865497) internal successors, (175), 172 states have internal predecessors, (175), 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) [2024-11-28 04:20:35,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2024-11-28 04:20:35,522 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 162 [2024-11-28 04:20:35,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:20:35,523 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2024-11-28 04:20:35,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 3.319327731092437) internal successors, (395), 119 states have internal predecessors, (395), 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) [2024-11-28 04:20:35,523 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2024-11-28 04:20:35,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2024-11-28 04:20:35,524 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:20:35,524 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:20:35,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-11-28 04:20:35,724 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:20:35,725 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:20:35,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:20:35,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1080480872, now seen corresponding path program 15 times [2024-11-28 04:20:35,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:20:35,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386992977] [2024-11-28 04:20:35,726 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:20:35,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:20:35,801 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-28 04:20:35,801 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:20:37,059 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 120 proven. 415 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-28 04:20:37,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:20:37,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386992977] [2024-11-28 04:20:37,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386992977] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:20:37,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472192921] [2024-11-28 04:20:37,059 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:20:37,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:20:37,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:20:37,061 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:20:37,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-28 04:20:38,937 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-28 04:20:38,937 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:20:38,944 INFO L256 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 118 conjuncts are in the unsatisfiable core [2024-11-28 04:20:38,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:20:40,235 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 153 proven. 572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:20:40,235 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:20:41,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-28 04:20:41,797 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 153 proven. 382 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-28 04:20:41,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472192921] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:20:41,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:20:41,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 39, 26] total 80 [2024-11-28 04:20:41,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251967882] [2024-11-28 04:20:41,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:20:41,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2024-11-28 04:20:41,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:20:41,799 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2024-11-28 04:20:41,800 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=680, Invalid=5800, Unknown=0, NotChecked=0, Total=6480 [2024-11-28 04:20:41,800 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand has 81 states, 80 states have (on average 4.725) internal successors, (378), 81 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:20:43,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:20:43,842 INFO L93 Difference]: Finished difference Result 182 states and 185 transitions. [2024-11-28 04:20:43,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-28 04:20:43,842 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 80 states have (on average 4.725) internal successors, (378), 81 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2024-11-28 04:20:43,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:20:43,843 INFO L225 Difference]: With dead ends: 182 [2024-11-28 04:20:43,843 INFO L226 Difference]: Without dead ends: 182 [2024-11-28 04:20:43,845 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3749 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1263, Invalid=8837, Unknown=0, NotChecked=0, Total=10100 [2024-11-28 04:20:43,845 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 2473 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 990 SdHoareTripleChecker+Invalid, 2493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 2473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:20:43,845 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 990 Invalid, 2493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 2473 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-28 04:20:43,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-11-28 04:20:43,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 175. [2024-11-28 04:20:43,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 173 states have (on average 1.023121387283237) internal successors, (177), 174 states have internal predecessors, (177), 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) [2024-11-28 04:20:43,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2024-11-28 04:20:43,849 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 166 [2024-11-28 04:20:43,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:20:43,849 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2024-11-28 04:20:43,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 80 states have (on average 4.725) internal successors, (378), 81 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:20:43,850 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2024-11-28 04:20:43,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2024-11-28 04:20:43,850 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:20:43,851 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:20:43,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-28 04:20:44,051 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:20:44,051 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:20:44,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:20:44,052 INFO L85 PathProgramCache]: Analyzing trace with hash 2101706923, now seen corresponding path program 19 times [2024-11-28 04:20:44,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:20:44,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664005944] [2024-11-28 04:20:44,052 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:20:44,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:20:44,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:20:45,645 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 21 proven. 565 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-28 04:20:45,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:20:45,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664005944] [2024-11-28 04:20:45,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664005944] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:20:45,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786729823] [2024-11-28 04:20:45,646 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:20:45,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:20:45,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:20:45,648 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:20:45,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-28 04:20:45,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:20:45,978 INFO L256 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 120 conjuncts are in the unsatisfiable core [2024-11-28 04:20:45,980 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:20:46,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 04:20:46,669 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 21 proven. 565 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-28 04:20:46,669 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:20:46,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 04:20:46,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 04:20:46,988 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 21 proven. 565 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-28 04:20:46,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786729823] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:20:46,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:20:46,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 46 [2024-11-28 04:20:46,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372769698] [2024-11-28 04:20:46,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:20:46,989 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-28 04:20:46,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:20:46,990 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-28 04:20:46,991 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1952, Unknown=0, NotChecked=0, Total=2070 [2024-11-28 04:20:46,991 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand has 46 states, 46 states have (on average 4.282608695652174) internal successors, (197), 46 states have internal predecessors, (197), 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) [2024-11-28 04:20:48,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:20:48,358 INFO L93 Difference]: Finished difference Result 305 states and 308 transitions. [2024-11-28 04:20:48,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-28 04:20:48,358 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.282608695652174) internal successors, (197), 46 states have internal predecessors, (197), 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 171 [2024-11-28 04:20:48,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:20:48,359 INFO L225 Difference]: With dead ends: 305 [2024-11-28 04:20:48,359 INFO L226 Difference]: Without dead ends: 182 [2024-11-28 04:20:48,360 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=173, Invalid=2907, Unknown=0, NotChecked=0, Total=3080 [2024-11-28 04:20:48,360 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 29 mSDsluCounter, 2175 mSDsCounter, 0 mSdLazyCounter, 2381 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 2243 SdHoareTripleChecker+Invalid, 2391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:20:48,360 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 2243 Invalid, 2391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2381 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-28 04:20:48,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-11-28 04:20:48,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 179. [2024-11-28 04:20:48,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 177 states have (on average 1.0225988700564972) internal successors, (181), 178 states have internal predecessors, (181), 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) [2024-11-28 04:20:48,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 181 transitions. [2024-11-28 04:20:48,367 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 181 transitions. Word has length 171 [2024-11-28 04:20:48,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:20:48,367 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 181 transitions. [2024-11-28 04:20:48,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.282608695652174) internal successors, (197), 46 states have internal predecessors, (197), 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) [2024-11-28 04:20:48,367 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 181 transitions. [2024-11-28 04:20:48,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2024-11-28 04:20:48,368 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:20:48,368 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:20:48,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-11-28 04:20:48,569 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:20:48,569 INFO L396 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:20:48,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:20:48,569 INFO L85 PathProgramCache]: Analyzing trace with hash 183911762, now seen corresponding path program 20 times [2024-11-28 04:20:48,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:20:48,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954154355] [2024-11-28 04:20:48,570 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:20:48,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:20:48,612 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:20:48,612 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:20:50,125 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 153 proven. 474 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-28 04:20:50,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:20:50,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954154355] [2024-11-28 04:20:50,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954154355] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:20:50,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690070520] [2024-11-28 04:20:50,126 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:20:50,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:20:50,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:20:50,128 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:20:50,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-28 04:20:50,471 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:20:50,471 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:20:50,475 INFO L256 TraceCheckSpWp]: Trace formula consists of 824 conjuncts, 110 conjuncts are in the unsatisfiable core [2024-11-28 04:20:50,478 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:20:51,228 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 190 proven. 437 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-28 04:20:51,228 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:20:52,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 04:20:52,457 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 190 proven. 437 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-28 04:20:52,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690070520] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:20:52,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:20:52,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 56 [2024-11-28 04:20:52,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113348504] [2024-11-28 04:20:52,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:20:52,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-28 04:20:52,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:20:52,459 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-28 04:20:52,459 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=2825, Unknown=0, NotChecked=0, Total=3192 [2024-11-28 04:20:52,460 INFO L87 Difference]: Start difference. First operand 179 states and 181 transitions. Second operand has 57 states, 56 states have (on average 5.053571428571429) internal successors, (283), 57 states have internal predecessors, (283), 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) [2024-11-28 04:20:53,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:20:53,565 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2024-11-28 04:20:53,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-28 04:20:53,566 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 5.053571428571429) internal successors, (283), 57 states have internal predecessors, (283), 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 175 [2024-11-28 04:20:53,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:20:53,567 INFO L225 Difference]: With dead ends: 188 [2024-11-28 04:20:53,567 INFO L226 Difference]: Without dead ends: 188 [2024-11-28 04:20:53,567 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 308 SyntacticMatches, 12 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1551 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=409, Invalid=3013, Unknown=0, NotChecked=0, Total=3422 [2024-11-28 04:20:53,567 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 13 mSDsluCounter, 1159 mSDsCounter, 0 mSdLazyCounter, 2013 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1217 SdHoareTripleChecker+Invalid, 2016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 2013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:20:53,567 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1217 Invalid, 2016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 2013 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-28 04:20:53,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2024-11-28 04:20:53,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2024-11-28 04:20:53,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 182 states have (on average 1.021978021978022) internal successors, (186), 183 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:20:53,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 186 transitions. [2024-11-28 04:20:53,570 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 186 transitions. Word has length 175 [2024-11-28 04:20:53,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:20:53,570 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 186 transitions. [2024-11-28 04:20:53,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 5.053571428571429) internal successors, (283), 57 states have internal predecessors, (283), 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) [2024-11-28 04:20:53,570 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 186 transitions. [2024-11-28 04:20:53,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2024-11-28 04:20:53,571 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:20:53,571 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:20:53,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-11-28 04:20:53,771 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:20:53,771 INFO L396 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:20:53,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:20:53,771 INFO L85 PathProgramCache]: Analyzing trace with hash 645544467, now seen corresponding path program 16 times [2024-11-28 04:20:53,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:20:53,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014858927] [2024-11-28 04:20:53,772 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:20:53,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:20:53,859 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:20:53,859 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:20:56,635 INFO L134 CoverageAnalysis]: Checked inductivity of 839 backedges. 43 proven. 796 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:20:56,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:20:56,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014858927] [2024-11-28 04:20:56,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014858927] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:20:56,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416501192] [2024-11-28 04:20:56,635 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:20:56,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:20:56,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:20:56,637 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:20:56,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-28 04:20:58,735 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:20:58,735 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:20:58,744 INFO L256 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 254 conjuncts are in the unsatisfiable core [2024-11-28 04:20:58,749 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:20:59,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 04:21:00,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 04:21:00,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 04:21:04,586 INFO L134 CoverageAnalysis]: Checked inductivity of 839 backedges. 43 proven. 796 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:21:04,586 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:21:07,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-11-28 04:21:07,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2024-11-28 04:21:09,750 INFO L134 CoverageAnalysis]: Checked inductivity of 839 backedges. 43 proven. 565 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-11-28 04:21:09,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416501192] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:21:09,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:21:09,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 56, 43] total 137 [2024-11-28 04:21:09,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41236610] [2024-11-28 04:21:09,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:21:09,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2024-11-28 04:21:09,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:21:09,752 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2024-11-28 04:21:09,754 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=18180, Unknown=0, NotChecked=0, Total=18632 [2024-11-28 04:21:09,754 INFO L87 Difference]: Start difference. First operand 184 states and 186 transitions. Second operand has 137 states, 137 states have (on average 3.4452554744525545) internal successors, (472), 137 states have internal predecessors, (472), 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) [2024-11-28 04:21:19,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:21:19,351 INFO L93 Difference]: Finished difference Result 275 states and 277 transitions. [2024-11-28 04:21:19,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-11-28 04:21:19,352 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 3.4452554744525545) internal successors, (472), 137 states have internal predecessors, (472), 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 177 [2024-11-28 04:21:19,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:21:19,353 INFO L225 Difference]: With dead ends: 275 [2024-11-28 04:21:19,353 INFO L226 Difference]: Without dead ends: 194 [2024-11-28 04:21:19,354 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5874 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=750, Invalid=26972, Unknown=0, NotChecked=0, Total=27722 [2024-11-28 04:21:19,354 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 115 mSDsluCounter, 4175 mSDsCounter, 0 mSdLazyCounter, 11230 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 4227 SdHoareTripleChecker+Invalid, 11251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 11230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:21:19,354 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 4227 Invalid, 11251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 11230 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2024-11-28 04:21:19,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2024-11-28 04:21:19,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 188. [2024-11-28 04:21:19,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 186 states have (on average 1.021505376344086) internal successors, (190), 187 states have internal predecessors, (190), 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) [2024-11-28 04:21:19,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 190 transitions. [2024-11-28 04:21:19,357 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 190 transitions. Word has length 177 [2024-11-28 04:21:19,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:21:19,357 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 190 transitions. [2024-11-28 04:21:19,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 3.4452554744525545) internal successors, (472), 137 states have internal predecessors, (472), 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) [2024-11-28 04:21:19,358 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 190 transitions. [2024-11-28 04:21:19,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2024-11-28 04:21:19,359 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:21:19,359 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:21:19,373 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-11-28 04:21:19,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2024-11-28 04:21:19,559 INFO L396 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:21:19,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:21:19,560 INFO L85 PathProgramCache]: Analyzing trace with hash -574127430, now seen corresponding path program 17 times [2024-11-28 04:21:19,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:21:19,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090151548] [2024-11-28 04:21:19,560 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:21:19,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:21:19,698 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-11-28 04:21:19,699 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:21:21,028 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 193 proven. 456 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-11-28 04:21:21,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:21:21,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090151548] [2024-11-28 04:21:21,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090151548] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:21:21,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192380253] [2024-11-28 04:21:21,029 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:21:21,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:21:21,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:21:21,030 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:21:21,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-28 04:21:22,431 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-11-28 04:21:22,431 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:21:22,439 INFO L256 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 119 conjuncts are in the unsatisfiable core [2024-11-28 04:21:22,442 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:21:22,447 INFO L378 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 1 [2024-11-28 04:21:23,326 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 190 proven. 459 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-11-28 04:21:23,326 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:21:25,277 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 190 proven. 459 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-11-28 04:21:25,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192380253] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:21:25,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:21:25,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28, 28] total 72 [2024-11-28 04:21:25,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852997454] [2024-11-28 04:21:25,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:21:25,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-11-28 04:21:25,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:21:25,280 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-11-28 04:21:25,280 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=730, Invalid=4526, Unknown=0, NotChecked=0, Total=5256 [2024-11-28 04:21:25,280 INFO L87 Difference]: Start difference. First operand 188 states and 190 transitions. Second operand has 73 states, 72 states have (on average 4.722222222222222) internal successors, (340), 73 states have internal predecessors, (340), 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) [2024-11-28 04:21:27,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:21:27,009 INFO L93 Difference]: Finished difference Result 190 states and 192 transitions. [2024-11-28 04:21:27,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-28 04:21:27,009 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 4.722222222222222) internal successors, (340), 73 states have internal predecessors, (340), 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 181 [2024-11-28 04:21:27,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:21:27,010 INFO L225 Difference]: With dead ends: 190 [2024-11-28 04:21:27,010 INFO L226 Difference]: Without dead ends: 190 [2024-11-28 04:21:27,011 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2471 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=883, Invalid=6257, Unknown=0, NotChecked=0, Total=7140 [2024-11-28 04:21:27,011 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 11 mSDsluCounter, 1473 mSDsCounter, 0 mSdLazyCounter, 2476 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1533 SdHoareTripleChecker+Invalid, 2477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:21:27,011 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 1533 Invalid, 2477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2476 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-28 04:21:27,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2024-11-28 04:21:27,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2024-11-28 04:21:27,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 188 states have (on average 1.0212765957446808) internal successors, (192), 189 states have internal predecessors, (192), 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) [2024-11-28 04:21:27,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 192 transitions. [2024-11-28 04:21:27,015 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 192 transitions. Word has length 181 [2024-11-28 04:21:27,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:21:27,015 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 192 transitions. [2024-11-28 04:21:27,015 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 4.722222222222222) internal successors, (340), 73 states have internal predecessors, (340), 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) [2024-11-28 04:21:27,015 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 192 transitions. [2024-11-28 04:21:27,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2024-11-28 04:21:27,016 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:21:27,016 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:21:27,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-11-28 04:21:27,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:21:27,216 INFO L396 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:21:27,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:21:27,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1149612343, now seen corresponding path program 21 times [2024-11-28 04:21:27,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:21:27,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598066022] [2024-11-28 04:21:27,217 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:21:27,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:21:27,384 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-11-28 04:21:27,385 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:21:30,408 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 23 proven. 682 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-11-28 04:21:30,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:21:30,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598066022] [2024-11-28 04:21:30,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598066022] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:21:30,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060960770] [2024-11-28 04:21:30,408 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:21:30,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:21:30,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:21:30,410 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:21:30,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-28 04:21:31,872 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-11-28 04:21:31,872 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:21:31,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 130 conjuncts are in the unsatisfiable core [2024-11-28 04:21:31,883 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:21:32,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 04:21:33,755 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 23 proven. 682 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-11-28 04:21:33,755 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:21:33,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 04:21:33,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 04:21:34,194 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 23 proven. 682 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-11-28 04:21:34,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060960770] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:21:34,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:21:34,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 31, 31] total 77 [2024-11-28 04:21:34,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400555949] [2024-11-28 04:21:34,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:21:34,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-11-28 04:21:34,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:21:34,196 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-11-28 04:21:34,196 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=5643, Unknown=0, NotChecked=0, Total=5852 [2024-11-28 04:21:34,196 INFO L87 Difference]: Start difference. First operand 190 states and 192 transitions. Second operand has 77 states, 77 states have (on average 3.74025974025974) internal successors, (288), 77 states have internal predecessors, (288), 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) [2024-11-28 04:21:37,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:21:37,212 INFO L93 Difference]: Finished difference Result 331 states and 334 transitions. [2024-11-28 04:21:37,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-11-28 04:21:37,212 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.74025974025974) internal successors, (288), 77 states have internal predecessors, (288), 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 186 [2024-11-28 04:21:37,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:21:37,213 INFO L225 Difference]: With dead ends: 331 [2024-11-28 04:21:37,213 INFO L226 Difference]: Without dead ends: 197 [2024-11-28 04:21:37,214 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=278, Invalid=7732, Unknown=0, NotChecked=0, Total=8010 [2024-11-28 04:21:37,214 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 29 mSDsluCounter, 2492 mSDsCounter, 0 mSdLazyCounter, 4547 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 2547 SdHoareTripleChecker+Invalid, 4560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 4547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:21:37,214 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 2547 Invalid, 4560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 4547 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-28 04:21:37,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-11-28 04:21:37,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194. [2024-11-28 04:21:37,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 192 states have (on average 1.0208333333333333) internal successors, (196), 193 states have internal predecessors, (196), 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) [2024-11-28 04:21:37,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 196 transitions. [2024-11-28 04:21:37,217 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 196 transitions. Word has length 186 [2024-11-28 04:21:37,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:21:37,217 INFO L471 AbstractCegarLoop]: Abstraction has 194 states and 196 transitions. [2024-11-28 04:21:37,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.74025974025974) internal successors, (288), 77 states have internal predecessors, (288), 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) [2024-11-28 04:21:37,218 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 196 transitions. [2024-11-28 04:21:37,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2024-11-28 04:21:37,218 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:21:37,219 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:21:37,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-11-28 04:21:37,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:21:37,419 INFO L396 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:21:37,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:21:37,419 INFO L85 PathProgramCache]: Analyzing trace with hash -338639038, now seen corresponding path program 22 times [2024-11-28 04:21:37,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:21:37,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404385032] [2024-11-28 04:21:37,420 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:21:37,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:21:37,485 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:21:37,485 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:21:38,643 INFO L134 CoverageAnalysis]: Checked inductivity of 981 backedges. 231 proven. 519 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-11-28 04:21:38,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:21:38,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404385032] [2024-11-28 04:21:38,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404385032] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:21:38,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228323937] [2024-11-28 04:21:38,644 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:21:38,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:21:38,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:21:38,646 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:21:38,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-28 04:21:40,390 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:21:40,390 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:21:40,398 INFO L256 TraceCheckSpWp]: Trace formula consists of 892 conjuncts, 121 conjuncts are in the unsatisfiable core [2024-11-28 04:21:40,402 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:21:41,533 INFO L134 CoverageAnalysis]: Checked inductivity of 981 backedges. 231 proven. 519 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-11-28 04:21:41,533 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:21:42,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-28 04:21:43,404 INFO L134 CoverageAnalysis]: Checked inductivity of 981 backedges. 231 proven. 519 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-11-28 04:21:43,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228323937] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:21:43,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:21:43,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 71 [2024-11-28 04:21:43,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624233152] [2024-11-28 04:21:43,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:21:43,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-11-28 04:21:43,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:21:43,406 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-11-28 04:21:43,407 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=4440, Unknown=0, NotChecked=0, Total=5112 [2024-11-28 04:21:43,407 INFO L87 Difference]: Start difference. First operand 194 states and 196 transitions. Second operand has 72 states, 71 states have (on average 5.098591549295775) internal successors, (362), 72 states have internal predecessors, (362), 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) [2024-11-28 04:21:45,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:21:45,009 INFO L93 Difference]: Finished difference Result 203 states and 205 transitions. [2024-11-28 04:21:45,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-28 04:21:45,010 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 5.098591549295775) internal successors, (362), 72 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2024-11-28 04:21:45,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:21:45,010 INFO L225 Difference]: With dead ends: 203 [2024-11-28 04:21:45,010 INFO L226 Difference]: Without dead ends: 203 [2024-11-28 04:21:45,011 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1415 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=729, Invalid=4673, Unknown=0, NotChecked=0, Total=5402 [2024-11-28 04:21:45,011 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 13 mSDsluCounter, 1757 mSDsCounter, 0 mSdLazyCounter, 2898 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1820 SdHoareTripleChecker+Invalid, 2899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:21:45,011 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1820 Invalid, 2899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2898 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-28 04:21:45,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2024-11-28 04:21:45,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 199. [2024-11-28 04:21:45,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 197 states have (on average 1.0203045685279188) internal successors, (201), 198 states have internal predecessors, (201), 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) [2024-11-28 04:21:45,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2024-11-28 04:21:45,014 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 190 [2024-11-28 04:21:45,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:21:45,015 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2024-11-28 04:21:45,015 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 5.098591549295775) internal successors, (362), 72 states have internal predecessors, (362), 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) [2024-11-28 04:21:45,015 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2024-11-28 04:21:45,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2024-11-28 04:21:45,016 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:21:45,016 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:21:45,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-11-28 04:21:45,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:21:45,217 INFO L396 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:21:45,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:21:45,217 INFO L85 PathProgramCache]: Analyzing trace with hash 985399299, now seen corresponding path program 18 times [2024-11-28 04:21:45,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:21:45,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162499030] [2024-11-28 04:21:45,217 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:21:45,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:21:45,359 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-11-28 04:21:45,359 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:21:47,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 47 proven. 682 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-28 04:21:47,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:21:47,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162499030] [2024-11-28 04:21:47,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162499030] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:21:47,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797513671] [2024-11-28 04:21:47,032 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:21:47,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:21:47,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:21:47,034 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:21:47,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-28 04:21:51,137 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-11-28 04:21:51,137 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:21:51,148 INFO L256 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 277 conjuncts are in the unsatisfiable core [2024-11-28 04:21:51,153 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:21:51,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 04:21:52,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 04:21:52,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 04:21:56,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 47 proven. 958 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:21:56,624 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:21:59,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-11-28 04:21:59,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2024-11-28 04:22:01,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 47 proven. 682 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-28 04:22:01,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797513671] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:22:01,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:22:01,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 60, 46] total 136 [2024-11-28 04:22:01,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515522871] [2024-11-28 04:22:01,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:22:01,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2024-11-28 04:22:01,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:22:01,897 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2024-11-28 04:22:01,898 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=17895, Unknown=0, NotChecked=0, Total=18360 [2024-11-28 04:22:01,898 INFO L87 Difference]: Start difference. First operand 199 states and 201 transitions. Second operand has 136 states, 136 states have (on average 3.448529411764706) internal successors, (469), 136 states have internal predecessors, (469), 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) [2024-11-28 04:22:11,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:22:11,241 INFO L93 Difference]: Finished difference Result 297 states and 299 transitions. [2024-11-28 04:22:11,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2024-11-28 04:22:11,242 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 3.448529411764706) internal successors, (469), 136 states have internal predecessors, (469), 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 192 [2024-11-28 04:22:11,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:22:11,243 INFO L225 Difference]: With dead ends: 297 [2024-11-28 04:22:11,243 INFO L226 Difference]: Without dead ends: 209 [2024-11-28 04:22:11,244 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8222 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=801, Invalid=31419, Unknown=0, NotChecked=0, Total=32220 [2024-11-28 04:22:11,244 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 60 mSDsluCounter, 3780 mSDsCounter, 0 mSdLazyCounter, 10160 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 3835 SdHoareTripleChecker+Invalid, 10171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 10160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2024-11-28 04:22:11,244 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 3835 Invalid, 10171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 10160 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2024-11-28 04:22:11,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2024-11-28 04:22:11,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 203. [2024-11-28 04:22:11,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 201 states have (on average 1.0199004975124377) internal successors, (205), 202 states have internal predecessors, (205), 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) [2024-11-28 04:22:11,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 205 transitions. [2024-11-28 04:22:11,248 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 205 transitions. Word has length 192 [2024-11-28 04:22:11,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:22:11,248 INFO L471 AbstractCegarLoop]: Abstraction has 203 states and 205 transitions. [2024-11-28 04:22:11,248 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 3.448529411764706) internal successors, (469), 136 states have internal predecessors, (469), 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) [2024-11-28 04:22:11,248 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 205 transitions. [2024-11-28 04:22:11,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2024-11-28 04:22:11,249 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:22:11,250 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:22:11,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-11-28 04:22:11,450 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2024-11-28 04:22:11,450 INFO L396 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:22:11,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:22:11,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1820906620, now seen corresponding path program 19 times [2024-11-28 04:22:11,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:22:11,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294460878] [2024-11-28 04:22:11,451 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:22:11,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:22:11,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:22:13,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 190 proven. 584 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-28 04:22:13,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:22:13,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294460878] [2024-11-28 04:22:13,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294460878] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:22:13,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645938266] [2024-11-28 04:22:13,162 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:22:13,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:22:13,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:22:13,164 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:22:13,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-28 04:22:13,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:22:13,559 INFO L256 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 123 conjuncts are in the unsatisfiable core [2024-11-28 04:22:13,562 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:22:14,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 231 proven. 543 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-28 04:22:14,437 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:22:15,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 04:22:15,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 231 proven. 543 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-28 04:22:15,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645938266] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:22:15,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:22:15,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 63 [2024-11-28 04:22:15,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024736520] [2024-11-28 04:22:15,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:22:15,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-11-28 04:22:15,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:22:15,834 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-11-28 04:22:15,834 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=454, Invalid=3578, Unknown=0, NotChecked=0, Total=4032 [2024-11-28 04:22:15,835 INFO L87 Difference]: Start difference. First operand 203 states and 205 transitions. Second operand has 64 states, 63 states have (on average 4.857142857142857) internal successors, (306), 64 states have internal predecessors, (306), 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) [2024-11-28 04:22:17,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:22:17,526 INFO L93 Difference]: Finished difference Result 205 states and 207 transitions. [2024-11-28 04:22:17,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-28 04:22:17,527 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 4.857142857142857) internal successors, (306), 64 states have internal predecessors, (306), 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 196 [2024-11-28 04:22:17,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:22:17,528 INFO L225 Difference]: With dead ends: 205 [2024-11-28 04:22:17,528 INFO L226 Difference]: Without dead ends: 205 [2024-11-28 04:22:17,528 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 346 SyntacticMatches, 13 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2497 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=611, Invalid=5241, Unknown=0, NotChecked=0, Total=5852 [2024-11-28 04:22:17,528 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 3 mSDsluCounter, 1457 mSDsCounter, 0 mSdLazyCounter, 2510 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1521 SdHoareTripleChecker+Invalid, 2510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:22:17,528 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1521 Invalid, 2510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2510 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-28 04:22:17,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-11-28 04:22:17,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2024-11-28 04:22:17,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 203 states have (on average 1.019704433497537) internal successors, (207), 204 states have internal predecessors, (207), 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) [2024-11-28 04:22:17,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2024-11-28 04:22:17,531 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 196 [2024-11-28 04:22:17,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:22:17,531 INFO L471 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2024-11-28 04:22:17,532 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 4.857142857142857) internal successors, (306), 64 states have internal predecessors, (306), 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) [2024-11-28 04:22:17,532 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2024-11-28 04:22:17,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2024-11-28 04:22:17,533 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:22:17,533 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:22:17,546 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-11-28 04:22:17,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:22:17,733 INFO L396 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:22:17,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:22:17,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1058027961, now seen corresponding path program 23 times [2024-11-28 04:22:17,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:22:17,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172285940] [2024-11-28 04:22:17,734 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:22:17,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:22:17,875 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2024-11-28 04:22:17,875 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:22:19,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 25 proven. 810 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-28 04:22:19,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:22:19,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172285940] [2024-11-28 04:22:19,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172285940] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:22:19,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149600303] [2024-11-28 04:22:19,645 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:22:19,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:22:19,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:22:19,647 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:22:19,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-28 04:22:22,347 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2024-11-28 04:22:22,348 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:22:22,357 INFO L256 TraceCheckSpWp]: Trace formula consists of 947 conjuncts, 149 conjuncts are in the unsatisfiable core [2024-11-28 04:22:22,361 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:22:22,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 04:22:23,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 25 proven. 810 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-28 04:22:23,688 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:22:23,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 04:22:23,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 04:22:24,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 25 proven. 810 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-28 04:22:24,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149600303] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:22:24,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:22:24,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34, 33] total 66 [2024-11-28 04:22:24,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485584422] [2024-11-28 04:22:24,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:22:24,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-11-28 04:22:24,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:22:24,743 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-11-28 04:22:24,743 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=4114, Unknown=0, NotChecked=0, Total=4290 [2024-11-28 04:22:24,744 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand has 66 states, 66 states have (on average 4.742424242424242) internal successors, (313), 66 states have internal predecessors, (313), 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) [2024-11-28 04:22:26,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:22:26,852 INFO L93 Difference]: Finished difference Result 357 states and 360 transitions. [2024-11-28 04:22:26,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-28 04:22:26,852 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 4.742424242424242) internal successors, (313), 66 states have internal predecessors, (313), 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 201 [2024-11-28 04:22:26,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:22:26,853 INFO L225 Difference]: With dead ends: 357 [2024-11-28 04:22:26,854 INFO L226 Difference]: Without dead ends: 212 [2024-11-28 04:22:26,854 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=231, Invalid=5621, Unknown=0, NotChecked=0, Total=5852 [2024-11-28 04:22:26,854 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 27 mSDsluCounter, 3512 mSDsCounter, 0 mSdLazyCounter, 3918 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 3591 SdHoareTripleChecker+Invalid, 3930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 3918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-28 04:22:26,854 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 3591 Invalid, 3930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 3918 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-28 04:22:26,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2024-11-28 04:22:26,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 209. [2024-11-28 04:22:26,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 207 states have (on average 1.0193236714975846) internal successors, (211), 208 states have internal predecessors, (211), 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) [2024-11-28 04:22:26,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 211 transitions. [2024-11-28 04:22:26,857 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 211 transitions. Word has length 201 [2024-11-28 04:22:26,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:22:26,857 INFO L471 AbstractCegarLoop]: Abstraction has 209 states and 211 transitions. [2024-11-28 04:22:26,858 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 4.742424242424242) internal successors, (313), 66 states have internal predecessors, (313), 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) [2024-11-28 04:22:26,858 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 211 transitions. [2024-11-28 04:22:26,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2024-11-28 04:22:26,859 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:22:26,859 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:22:26,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2024-11-28 04:22:27,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:22:27,059 INFO L396 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:22:27,060 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:22:27,060 INFO L85 PathProgramCache]: Analyzing trace with hash 399256750, now seen corresponding path program 24 times [2024-11-28 04:22:27,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:22:27,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534338411] [2024-11-28 04:22:27,060 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:22:27,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:22:27,250 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-11-28 04:22:27,250 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:22:29,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 231 proven. 653 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-28 04:22:29,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:22:29,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534338411] [2024-11-28 04:22:29,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534338411] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:22:29,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787325021] [2024-11-28 04:22:29,308 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:22:29,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:22:29,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:22:29,310 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:22:29,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-11-28 04:22:33,739 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-11-28 04:22:33,739 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:22:33,752 INFO L256 TraceCheckSpWp]: Trace formula consists of 960 conjuncts, 103 conjuncts are in the unsatisfiable core [2024-11-28 04:22:33,755 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:22:33,762 INFO L378 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 1 [2024-11-28 04:22:34,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 276 proven. 608 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-28 04:22:34,600 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:22:36,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 276 proven. 608 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-28 04:22:36,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787325021] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:22:36,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:22:36,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 79 [2024-11-28 04:22:36,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641068497] [2024-11-28 04:22:36,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:22:36,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2024-11-28 04:22:36,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:22:36,776 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2024-11-28 04:22:36,776 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=964, Invalid=5356, Unknown=0, NotChecked=0, Total=6320 [2024-11-28 04:22:36,776 INFO L87 Difference]: Start difference. First operand 209 states and 211 transitions. Second operand has 80 states, 79 states have (on average 4.936708860759493) internal successors, (390), 80 states have internal predecessors, (390), 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) [2024-11-28 04:22:38,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:22:38,573 INFO L93 Difference]: Finished difference Result 218 states and 220 transitions. [2024-11-28 04:22:38,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-28 04:22:38,574 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 4.936708860759493) internal successors, (390), 80 states have internal predecessors, (390), 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 205 [2024-11-28 04:22:38,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:22:38,574 INFO L225 Difference]: With dead ends: 218 [2024-11-28 04:22:38,574 INFO L226 Difference]: Without dead ends: 218 [2024-11-28 04:22:38,575 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4048 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1693, Invalid=9437, Unknown=0, NotChecked=0, Total=11130 [2024-11-28 04:22:38,576 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 89 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 04:22:38,576 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 564 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1122 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 04:22:38,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-11-28 04:22:38,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 214. [2024-11-28 04:22:38,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 212 states have (on average 1.0188679245283019) internal successors, (216), 213 states have internal predecessors, (216), 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) [2024-11-28 04:22:38,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 216 transitions. [2024-11-28 04:22:38,579 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 216 transitions. Word has length 205 [2024-11-28 04:22:38,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:22:38,580 INFO L471 AbstractCegarLoop]: Abstraction has 214 states and 216 transitions. [2024-11-28 04:22:38,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 4.936708860759493) internal successors, (390), 80 states have internal predecessors, (390), 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) [2024-11-28 04:22:38,580 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 216 transitions. [2024-11-28 04:22:38,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2024-11-28 04:22:38,581 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:22:38,581 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:22:38,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-11-28 04:22:38,781 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:22:38,782 INFO L396 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:22:38,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:22:38,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1433647727, now seen corresponding path program 20 times [2024-11-28 04:22:38,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:22:38,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082131901] [2024-11-28 04:22:38,782 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:22:38,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:22:38,871 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:22:38,871 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:22:43,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1186 backedges. 190 proven. 671 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2024-11-28 04:22:43,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:22:43,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082131901] [2024-11-28 04:22:43,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082131901] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:22:43,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801918301] [2024-11-28 04:22:43,293 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:22:43,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:22:43,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:22:43,295 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:22:43,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-11-28 04:22:43,736 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:22:43,736 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:22:43,743 INFO L256 TraceCheckSpWp]: Trace formula consists of 974 conjuncts, 254 conjuncts are in the unsatisfiable core [2024-11-28 04:22:43,748 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:22:44,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 04:22:46,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1186 backedges. 51 proven. 810 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2024-11-28 04:22:46,283 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:22:46,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-28 04:22:46,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 04:22:46,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 04:22:47,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1186 backedges. 51 proven. 810 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2024-11-28 04:22:47,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801918301] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:22:47,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:22:47,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 36, 36] total 78 [2024-11-28 04:22:47,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190607339] [2024-11-28 04:22:47,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:22:47,041 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2024-11-28 04:22:47,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:22:47,042 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2024-11-28 04:22:47,042 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=5765, Unknown=0, NotChecked=0, Total=6006 [2024-11-28 04:22:47,042 INFO L87 Difference]: Start difference. First operand 214 states and 216 transitions. Second operand has 78 states, 78 states have (on average 4.141025641025641) internal successors, (323), 78 states have internal predecessors, (323), 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) [2024-11-28 04:22:53,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:22:53,609 INFO L93 Difference]: Finished difference Result 318 states and 320 transitions. [2024-11-28 04:22:53,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2024-11-28 04:22:53,610 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 4.141025641025641) internal successors, (323), 78 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 207 [2024-11-28 04:22:53,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:22:53,610 INFO L225 Difference]: With dead ends: 318 [2024-11-28 04:22:53,610 INFO L226 Difference]: Without dead ends: 223 [2024-11-28 04:22:53,611 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 385 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2838 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=650, Invalid=15100, Unknown=0, NotChecked=0, Total=15750 [2024-11-28 04:22:53,611 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 36 mSDsluCounter, 3300 mSDsCounter, 0 mSdLazyCounter, 6179 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 3362 SdHoareTripleChecker+Invalid, 6191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 6179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:22:53,611 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 3362 Invalid, 6191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 6179 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2024-11-28 04:22:53,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-11-28 04:22:53,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 220. [2024-11-28 04:22:53,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 218 states have (on average 1.018348623853211) internal successors, (222), 219 states have internal predecessors, (222), 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) [2024-11-28 04:22:53,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 222 transitions. [2024-11-28 04:22:53,615 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 222 transitions. Word has length 207 [2024-11-28 04:22:53,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:22:53,615 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 222 transitions. [2024-11-28 04:22:53,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 4.141025641025641) internal successors, (323), 78 states have internal predecessors, (323), 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) [2024-11-28 04:22:53,615 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 222 transitions. [2024-11-28 04:22:53,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2024-11-28 04:22:53,616 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:22:53,616 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:22:53,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2024-11-28 04:22:53,817 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2024-11-28 04:22:53,817 INFO L396 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:22:53,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:22:53,817 INFO L85 PathProgramCache]: Analyzing trace with hash 260562477, now seen corresponding path program 25 times [2024-11-28 04:22:53,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:22:53,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394987917] [2024-11-28 04:22:53,817 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:22:53,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:22:53,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:22:56,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 27 proven. 949 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2024-11-28 04:22:56,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:22:56,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394987917] [2024-11-28 04:22:56,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394987917] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:22:56,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571481636] [2024-11-28 04:22:56,193 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:22:56,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:22:56,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:22:56,195 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:22:56,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-11-28 04:22:56,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:22:56,669 INFO L256 TraceCheckSpWp]: Trace formula consists of 1015 conjuncts, 270 conjuncts are in the unsatisfiable core [2024-11-28 04:22:56,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:22:57,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 04:22:58,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 27 proven. 949 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2024-11-28 04:22:58,860 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:22:59,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-28 04:22:59,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 04:22:59,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 04:22:59,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 27 proven. 949 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2024-11-28 04:22:59,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571481636] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:22:59,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:22:59,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 38, 38] total 75 [2024-11-28 04:22:59,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458689772] [2024-11-28 04:22:59,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:22:59,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2024-11-28 04:22:59,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:22:59,632 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2024-11-28 04:22:59,633 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=5387, Unknown=0, NotChecked=0, Total=5550 [2024-11-28 04:22:59,633 INFO L87 Difference]: Start difference. First operand 220 states and 222 transitions. Second operand has 75 states, 75 states have (on average 4.493333333333333) internal successors, (337), 75 states have internal predecessors, (337), 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) [2024-11-28 04:23:08,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:23:08,676 INFO L93 Difference]: Finished difference Result 597 states and 602 transitions. [2024-11-28 04:23:08,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2024-11-28 04:23:08,676 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 4.493333333333333) internal successors, (337), 75 states have internal predecessors, (337), 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 216 [2024-11-28 04:23:08,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:23:08,677 INFO L225 Difference]: With dead ends: 597 [2024-11-28 04:23:08,677 INFO L226 Difference]: Without dead ends: 234 [2024-11-28 04:23:08,678 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3152 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=547, Invalid=22103, Unknown=0, NotChecked=0, Total=22650 [2024-11-28 04:23:08,678 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 70 mSDsluCounter, 4057 mSDsCounter, 0 mSdLazyCounter, 10824 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 4119 SdHoareTripleChecker+Invalid, 10852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 10824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:23:08,679 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 4119 Invalid, 10852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 10824 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2024-11-28 04:23:08,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2024-11-28 04:23:08,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 228. [2024-11-28 04:23:08,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 226 states have (on average 1.0176991150442478) internal successors, (230), 227 states have internal predecessors, (230), 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) [2024-11-28 04:23:08,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 230 transitions. [2024-11-28 04:23:08,683 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 230 transitions. Word has length 216 [2024-11-28 04:23:08,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:23:08,683 INFO L471 AbstractCegarLoop]: Abstraction has 228 states and 230 transitions. [2024-11-28 04:23:08,683 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 4.493333333333333) internal successors, (337), 75 states have internal predecessors, (337), 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) [2024-11-28 04:23:08,683 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 230 transitions. [2024-11-28 04:23:08,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2024-11-28 04:23:08,685 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:23:08,685 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:23:08,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-11-28 04:23:08,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2024-11-28 04:23:08,885 INFO L396 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:23:08,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:23:08,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1641255391, now seen corresponding path program 26 times [2024-11-28 04:23:08,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:23:08,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016953356] [2024-11-28 04:23:08,886 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:23:08,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:23:08,944 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:23:08,944 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:23:11,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1407 backedges. 276 proven. 753 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-11-28 04:23:11,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:23:11,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016953356] [2024-11-28 04:23:11,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016953356] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:23:11,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700778463] [2024-11-28 04:23:11,125 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:23:11,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:23:11,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:23:11,127 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:23:11,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-11-28 04:23:11,581 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:23:11,581 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:23:11,587 INFO L256 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 141 conjuncts are in the unsatisfiable core [2024-11-28 04:23:11,589 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:23:12,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1407 backedges. 325 proven. 704 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-11-28 04:23:12,860 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:23:13,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-28 04:23:15,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1407 backedges. 325 proven. 704 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-11-28 04:23:15,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700778463] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:23:15,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:23:15,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 81 [2024-11-28 04:23:15,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959870589] [2024-11-28 04:23:15,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:23:15,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2024-11-28 04:23:15,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:23:15,113 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2024-11-28 04:23:15,113 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=878, Invalid=5764, Unknown=0, NotChecked=0, Total=6642 [2024-11-28 04:23:15,114 INFO L87 Difference]: Start difference. First operand 228 states and 230 transitions. Second operand has 82 states, 81 states have (on average 5.111111111111111) internal successors, (414), 82 states have internal predecessors, (414), 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) [2024-11-28 04:23:16,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:23:16,877 INFO L93 Difference]: Finished difference Result 237 states and 239 transitions. [2024-11-28 04:23:16,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-28 04:23:16,878 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 5.111111111111111) internal successors, (414), 82 states have internal predecessors, (414), 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 224 [2024-11-28 04:23:16,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:23:16,879 INFO L225 Difference]: With dead ends: 237 [2024-11-28 04:23:16,879 INFO L226 Difference]: Without dead ends: 237 [2024-11-28 04:23:16,879 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 399 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2446 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=942, Invalid=6030, Unknown=0, NotChecked=0, Total=6972 [2024-11-28 04:23:16,879 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 14 mSDsluCounter, 1895 mSDsCounter, 0 mSdLazyCounter, 3159 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1965 SdHoareTripleChecker+Invalid, 3160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:23:16,880 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 1965 Invalid, 3160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3159 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-28 04:23:16,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2024-11-28 04:23:16,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 233. [2024-11-28 04:23:16,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 231 states have (on average 1.0173160173160174) internal successors, (235), 232 states have internal predecessors, (235), 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) [2024-11-28 04:23:16,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 235 transitions. [2024-11-28 04:23:16,883 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 235 transitions. Word has length 224 [2024-11-28 04:23:16,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:23:16,883 INFO L471 AbstractCegarLoop]: Abstraction has 233 states and 235 transitions. [2024-11-28 04:23:16,883 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 5.111111111111111) internal successors, (414), 82 states have internal predecessors, (414), 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) [2024-11-28 04:23:16,883 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 235 transitions. [2024-11-28 04:23:16,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2024-11-28 04:23:16,884 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:23:16,884 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:23:16,898 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2024-11-28 04:23:17,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2024-11-28 04:23:17,085 INFO L396 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:23:17,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:23:17,085 INFO L85 PathProgramCache]: Analyzing trace with hash 993433440, now seen corresponding path program 21 times [2024-11-28 04:23:17,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:23:17,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478351702] [2024-11-28 04:23:17,085 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:23:17,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:23:17,221 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-11-28 04:23:17,221 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:23:19,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1435 backedges. 276 proven. 781 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-11-28 04:23:19,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:23:19,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478351702] [2024-11-28 04:23:19,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478351702] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:23:19,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217945063] [2024-11-28 04:23:19,506 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:23:19,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:23:19,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:23:19,508 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:23:19,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-11-28 04:23:26,195 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-11-28 04:23:26,195 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:23:26,206 INFO L256 TraceCheckSpWp]: Trace formula consists of 1055 conjuncts, 116 conjuncts are in the unsatisfiable core [2024-11-28 04:23:26,209 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:23:26,212 INFO L378 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 1 [2024-11-28 04:23:26,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1435 backedges. 325 proven. 732 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-11-28 04:23:26,964 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:23:29,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1435 backedges. 325 proven. 732 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-11-28 04:23:29,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217945063] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:23:29,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:23:29,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 34, 34] total 89 [2024-11-28 04:23:29,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074190282] [2024-11-28 04:23:29,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:23:29,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2024-11-28 04:23:29,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:23:29,078 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2024-11-28 04:23:29,078 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1147, Invalid=6863, Unknown=0, NotChecked=0, Total=8010 [2024-11-28 04:23:29,078 INFO L87 Difference]: Start difference. First operand 233 states and 235 transitions. Second operand has 90 states, 89 states have (on average 4.674157303370786) internal successors, (416), 90 states have internal predecessors, (416), 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) [2024-11-28 04:23:31,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:23:31,080 INFO L93 Difference]: Finished difference Result 235 states and 237 transitions. [2024-11-28 04:23:31,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-28 04:23:31,080 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 89 states have (on average 4.674157303370786) internal successors, (416), 90 states have internal predecessors, (416), 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 226 [2024-11-28 04:23:31,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:23:31,081 INFO L225 Difference]: With dead ends: 235 [2024-11-28 04:23:31,081 INFO L226 Difference]: Without dead ends: 235 [2024-11-28 04:23:31,082 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 400 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5171 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2014, Invalid=11792, Unknown=0, NotChecked=0, Total=13806 [2024-11-28 04:23:31,082 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:23:31,083 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 503 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 04:23:31,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2024-11-28 04:23:31,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2024-11-28 04:23:31,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 233 states have (on average 1.0171673819742488) internal successors, (237), 234 states have internal predecessors, (237), 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) [2024-11-28 04:23:31,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 237 transitions. [2024-11-28 04:23:31,087 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 237 transitions. Word has length 226 [2024-11-28 04:23:31,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:23:31,088 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 237 transitions. [2024-11-28 04:23:31,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 89 states have (on average 4.674157303370786) internal successors, (416), 90 states have internal predecessors, (416), 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) [2024-11-28 04:23:31,088 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 237 transitions. [2024-11-28 04:23:31,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2024-11-28 04:23:31,090 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:23:31,090 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:23:31,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2024-11-28 04:23:31,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:23:31,291 INFO L396 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:23:31,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:23:31,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1482935837, now seen corresponding path program 27 times [2024-11-28 04:23:31,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:23:31,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019517434] [2024-11-28 04:23:31,291 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:23:31,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:23:31,494 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-28 04:23:31,494 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:23:35,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1506 backedges. 29 proven. 1099 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-11-28 04:23:35,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:23:35,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019517434] [2024-11-28 04:23:35,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019517434] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:23:35,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782816609] [2024-11-28 04:23:35,854 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:23:35,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:23:35,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:23:35,856 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:23:35,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-11-28 04:23:44,521 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-28 04:23:44,521 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:23:44,543 INFO L256 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 298 conjuncts are in the unsatisfiable core [2024-11-28 04:23:44,547 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:23:46,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-28 04:23:46,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 04:23:49,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1506 backedges. 29 proven. 1099 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-11-28 04:23:49,878 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:23:55,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-11-28 04:23:55,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2024-11-28 04:23:55,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-28 04:23:57,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1506 backedges. 29 proven. 1099 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-11-28 04:23:57,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782816609] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:23:57,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:23:57,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 55, 55] total 160 [2024-11-28 04:23:57,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173713505] [2024-11-28 04:23:57,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:23:57,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 160 states [2024-11-28 04:23:57,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:23:57,493 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2024-11-28 04:23:57,494 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=527, Invalid=24913, Unknown=0, NotChecked=0, Total=25440 [2024-11-28 04:23:57,495 INFO L87 Difference]: Start difference. First operand 235 states and 237 transitions. Second operand has 160 states, 160 states have (on average 3.2625) internal successors, (522), 160 states have internal predecessors, (522), 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) [2024-11-28 04:24:14,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:24:14,364 INFO L93 Difference]: Finished difference Result 638 states and 643 transitions. [2024-11-28 04:24:14,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2024-11-28 04:24:14,364 INFO L78 Accepts]: Start accepts. Automaton has has 160 states, 160 states have (on average 3.2625) internal successors, (522), 160 states have internal predecessors, (522), 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 231 [2024-11-28 04:24:14,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:24:14,365 INFO L225 Difference]: With dead ends: 638 [2024-11-28 04:24:14,365 INFO L226 Difference]: Without dead ends: 249 [2024-11-28 04:24:14,367 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8207 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=1190, Invalid=58590, Unknown=0, NotChecked=0, Total=59780 [2024-11-28 04:24:14,367 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 80 mSDsluCounter, 5675 mSDsCounter, 0 mSdLazyCounter, 15260 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 5742 SdHoareTripleChecker+Invalid, 15292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 15260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:24:14,367 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 5742 Invalid, 15292 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [32 Valid, 15260 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2024-11-28 04:24:14,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2024-11-28 04:24:14,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 243. [2024-11-28 04:24:14,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 241 states have (on average 1.016597510373444) internal successors, (245), 242 states have internal predecessors, (245), 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) [2024-11-28 04:24:14,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 245 transitions. [2024-11-28 04:24:14,369 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 245 transitions. Word has length 231 [2024-11-28 04:24:14,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:24:14,370 INFO L471 AbstractCegarLoop]: Abstraction has 243 states and 245 transitions. [2024-11-28 04:24:14,370 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 160 states, 160 states have (on average 3.2625) internal successors, (522), 160 states have internal predecessors, (522), 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) [2024-11-28 04:24:14,370 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 245 transitions. [2024-11-28 04:24:14,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2024-11-28 04:24:14,370 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:24:14,370 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:24:14,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2024-11-28 04:24:14,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:24:14,571 INFO L396 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:24:14,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:24:14,571 INFO L85 PathProgramCache]: Analyzing trace with hash -571931663, now seen corresponding path program 28 times [2024-11-28 04:24:14,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:24:14,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835653947] [2024-11-28 04:24:14,572 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:24:14,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:24:14,636 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:24:14,636 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:24:16,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1620 backedges. 378 proven. 807 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-11-28 04:24:16,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:24:16,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835653947] [2024-11-28 04:24:16,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835653947] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:24:16,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416701619] [2024-11-28 04:24:16,415 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:24:16,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:24:16,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:24:16,417 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:24:16,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-11-28 04:24:18,654 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:24:18,654 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:24:18,664 INFO L256 TraceCheckSpWp]: Trace formula consists of 1109 conjuncts, 150 conjuncts are in the unsatisfiable core [2024-11-28 04:24:18,667 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:24:20,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1620 backedges. 378 proven. 807 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-11-28 04:24:20,173 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:24:21,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-28 04:24:22,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1620 backedges. 378 proven. 807 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-11-28 04:24:22,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416701619] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:24:22,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:24:22,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 86 [2024-11-28 04:24:22,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587599354] [2024-11-28 04:24:22,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:24:22,698 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2024-11-28 04:24:22,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:24:22,699 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2024-11-28 04:24:22,699 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=6492, Unknown=0, NotChecked=0, Total=7482 [2024-11-28 04:24:22,699 INFO L87 Difference]: Start difference. First operand 243 states and 245 transitions. Second operand has 87 states, 86 states have (on average 5.116279069767442) internal successors, (440), 87 states have internal predecessors, (440), 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) [2024-11-28 04:24:24,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:24:24,512 INFO L93 Difference]: Finished difference Result 252 states and 254 transitions. [2024-11-28 04:24:24,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-28 04:24:24,513 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 5.116279069767442) internal successors, (440), 87 states have internal predecessors, (440), 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 239 [2024-11-28 04:24:24,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:24:24,514 INFO L225 Difference]: With dead ends: 252 [2024-11-28 04:24:24,514 INFO L226 Difference]: Without dead ends: 252 [2024-11-28 04:24:24,514 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 426 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2102 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1059, Invalid=6773, Unknown=0, NotChecked=0, Total=7832 [2024-11-28 04:24:24,514 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 17 mSDsluCounter, 1940 mSDsCounter, 0 mSdLazyCounter, 3311 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 2015 SdHoareTripleChecker+Invalid, 3312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-28 04:24:24,514 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 2015 Invalid, 3312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3311 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-28 04:24:24,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2024-11-28 04:24:24,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 248. [2024-11-28 04:24:24,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 246 states have (on average 1.016260162601626) internal successors, (250), 247 states have internal predecessors, (250), 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) [2024-11-28 04:24:24,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 250 transitions. [2024-11-28 04:24:24,518 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 250 transitions. Word has length 239 [2024-11-28 04:24:24,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:24:24,519 INFO L471 AbstractCegarLoop]: Abstraction has 248 states and 250 transitions. [2024-11-28 04:24:24,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 86 states have (on average 5.116279069767442) internal successors, (440), 87 states have internal predecessors, (440), 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) [2024-11-28 04:24:24,519 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 250 transitions. [2024-11-28 04:24:24,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2024-11-28 04:24:24,520 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:24:24,520 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:24:24,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2024-11-28 04:24:24,721 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2024-11-28 04:24:24,721 INFO L396 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:24:24,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:24:24,721 INFO L85 PathProgramCache]: Analyzing trace with hash 129486066, now seen corresponding path program 22 times [2024-11-28 04:24:24,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:24:24,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201263415] [2024-11-28 04:24:24,722 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:24:24,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:24:24,788 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:24:24,788 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:24:26,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 325 proven. 890 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-11-28 04:24:26,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:24:26,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201263415] [2024-11-28 04:24:26,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201263415] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:24:26,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94191107] [2024-11-28 04:24:26,668 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:24:26,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:24:26,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:24:26,670 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:24:26,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-11-28 04:24:28,245 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:24:28,245 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:24:28,254 INFO L256 TraceCheckSpWp]: Trace formula consists of 1123 conjuncts, 155 conjuncts are in the unsatisfiable core [2024-11-28 04:24:28,258 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:24:28,262 INFO L378 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 1 [2024-11-28 04:24:29,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 378 proven. 837 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-11-28 04:24:29,743 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:24:33,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 378 proven. 837 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-11-28 04:24:33,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94191107] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:24:33,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:24:33,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 91 [2024-11-28 04:24:33,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535855804] [2024-11-28 04:24:33,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:24:33,272 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2024-11-28 04:24:33,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:24:33,274 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2024-11-28 04:24:33,274 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=934, Invalid=7438, Unknown=0, NotChecked=0, Total=8372 [2024-11-28 04:24:33,274 INFO L87 Difference]: Start difference. First operand 248 states and 250 transitions. Second operand has 92 states, 91 states have (on average 4.8791208791208796) internal successors, (444), 92 states have internal predecessors, (444), 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) [2024-11-28 04:24:35,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:24:35,887 INFO L93 Difference]: Finished difference Result 250 states and 252 transitions. [2024-11-28 04:24:35,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-11-28 04:24:35,887 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 91 states have (on average 4.8791208791208796) internal successors, (444), 92 states have internal predecessors, (444), 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 241 [2024-11-28 04:24:35,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:24:35,888 INFO L225 Difference]: With dead ends: 250 [2024-11-28 04:24:35,888 INFO L226 Difference]: Without dead ends: 250 [2024-11-28 04:24:35,888 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2895 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1174, Invalid=10598, Unknown=0, NotChecked=0, Total=11772 [2024-11-28 04:24:35,889 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 3 mSDsluCounter, 1871 mSDsCounter, 0 mSdLazyCounter, 3340 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1947 SdHoareTripleChecker+Invalid, 3340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-28 04:24:35,889 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1947 Invalid, 3340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3340 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-28 04:24:35,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2024-11-28 04:24:35,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2024-11-28 04:24:35,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 248 states have (on average 1.0161290322580645) internal successors, (252), 249 states have internal predecessors, (252), 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) [2024-11-28 04:24:35,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 252 transitions. [2024-11-28 04:24:35,892 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 252 transitions. Word has length 241 [2024-11-28 04:24:35,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:24:35,892 INFO L471 AbstractCegarLoop]: Abstraction has 250 states and 252 transitions. [2024-11-28 04:24:35,893 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 91 states have (on average 4.8791208791208796) internal successors, (444), 92 states have internal predecessors, (444), 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) [2024-11-28 04:24:35,893 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 252 transitions. [2024-11-28 04:24:35,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2024-11-28 04:24:35,894 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:24:35,894 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:24:35,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2024-11-28 04:24:36,094 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2024-11-28 04:24:36,094 INFO L396 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:24:36,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:24:36,095 INFO L85 PathProgramCache]: Analyzing trace with hash -306731119, now seen corresponding path program 29 times [2024-11-28 04:24:36,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:24:36,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099494594] [2024-11-28 04:24:36,095 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:24:36,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:24:36,291 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2024-11-28 04:24:36,291 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:24:38,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1726 backedges. 31 proven. 1260 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-11-28 04:24:38,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:24:38,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099494594] [2024-11-28 04:24:38,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099494594] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:24:38,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545448639] [2024-11-28 04:24:38,526 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:24:38,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:24:38,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:24:38,528 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:24:38,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-11-28 04:24:48,595 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2024-11-28 04:24:48,595 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:24:48,612 INFO L256 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 206 conjuncts are in the unsatisfiable core [2024-11-28 04:24:48,617 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:24:50,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 04:24:52,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1726 backedges. 31 proven. 1695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:24:52,367 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:24:52,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 04:24:52,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 04:24:52,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1726 backedges. 31 proven. 1260 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-11-28 04:24:52,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545448639] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:24:52,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:24:52,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 54, 39] total 92 [2024-11-28 04:24:52,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310384262] [2024-11-28 04:24:52,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:24:52,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2024-11-28 04:24:52,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:24:52,838 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2024-11-28 04:24:52,838 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=8079, Unknown=0, NotChecked=0, Total=8372 [2024-11-28 04:24:52,838 INFO L87 Difference]: Start difference. First operand 250 states and 252 transitions. Second operand has 92 states, 92 states have (on average 4.717391304347826) internal successors, (434), 92 states have internal predecessors, (434), 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) [2024-11-28 04:24:57,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:24:57,171 INFO L93 Difference]: Finished difference Result 438 states and 441 transitions. [2024-11-28 04:24:57,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-11-28 04:24:57,171 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 4.717391304347826) internal successors, (434), 92 states have internal predecessors, (434), 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 246 [2024-11-28 04:24:57,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:24:57,172 INFO L225 Difference]: With dead ends: 438 [2024-11-28 04:24:57,172 INFO L226 Difference]: Without dead ends: 257 [2024-11-28 04:24:57,173 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 439 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2189 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=363, Invalid=10767, Unknown=0, NotChecked=0, Total=11130 [2024-11-28 04:24:57,174 INFO L435 NwaCegarLoop]: 104 mSDtfsCounter, 40 mSDsluCounter, 5750 mSDsCounter, 0 mSdLazyCounter, 8732 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 5854 SdHoareTripleChecker+Invalid, 8747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 8732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-11-28 04:24:57,174 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 5854 Invalid, 8747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 8732 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2024-11-28 04:24:57,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2024-11-28 04:24:57,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 254. [2024-11-28 04:24:57,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 252 states have (on average 1.0158730158730158) internal successors, (256), 253 states have internal predecessors, (256), 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) [2024-11-28 04:24:57,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 256 transitions. [2024-11-28 04:24:57,177 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 256 transitions. Word has length 246 [2024-11-28 04:24:57,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:24:57,177 INFO L471 AbstractCegarLoop]: Abstraction has 254 states and 256 transitions. [2024-11-28 04:24:57,178 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 4.717391304347826) internal successors, (434), 92 states have internal predecessors, (434), 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) [2024-11-28 04:24:57,178 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 256 transitions. [2024-11-28 04:24:57,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2024-11-28 04:24:57,179 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:24:57,179 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:24:57,199 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2024-11-28 04:24:57,379 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable80 [2024-11-28 04:24:57,380 INFO L396 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:24:57,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:24:57,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1306721418, now seen corresponding path program 30 times [2024-11-28 04:24:57,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:24:57,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002184405] [2024-11-28 04:24:57,380 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:24:57,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:24:57,569 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2024-11-28 04:24:57,569 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:25:00,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1787 backedges. 378 proven. 974 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-11-28 04:25:00,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:25:00,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002184405] [2024-11-28 04:25:00,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002184405] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:25:00,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913823467] [2024-11-28 04:25:00,207 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:25:00,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:25:00,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:25:00,208 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:25:00,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-11-28 04:26:19,587 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2024-11-28 04:26:19,587 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:26:19,638 INFO L256 TraceCheckSpWp]: Trace formula consists of 1164 conjuncts, 184 conjuncts are in the unsatisfiable core [2024-11-28 04:26:19,642 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:26:20,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 04:26:22,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1787 backedges. 31 proven. 1260 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2024-11-28 04:26:22,597 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:26:22,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-28 04:26:23,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 04:26:23,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 04:26:23,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1787 backedges. 31 proven. 1260 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2024-11-28 04:26:23,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913823467] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:26:23,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:26:23,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 42, 42] total 84 [2024-11-28 04:26:23,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006902240] [2024-11-28 04:26:23,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:26:23,493 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2024-11-28 04:26:23,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:26:23,494 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2024-11-28 04:26:23,495 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=6570, Unknown=0, NotChecked=0, Total=6972 [2024-11-28 04:26:23,495 INFO L87 Difference]: Start difference. First operand 254 states and 256 transitions. Second operand has 84 states, 84 states have (on average 4.630952380952381) internal successors, (389), 84 states have internal predecessors, (389), 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) [2024-11-28 04:26:35,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:26:35,733 INFO L93 Difference]: Finished difference Result 386 states and 388 transitions. [2024-11-28 04:26:35,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2024-11-28 04:26:35,733 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 4.630952380952381) internal successors, (389), 84 states have internal predecessors, (389), 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 250 [2024-11-28 04:26:35,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:26:35,734 INFO L225 Difference]: With dead ends: 386 [2024-11-28 04:26:35,734 INFO L226 Difference]: Without dead ends: 270 [2024-11-28 04:26:35,737 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10647 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=2456, Invalid=38146, Unknown=0, NotChecked=0, Total=40602 [2024-11-28 04:26:35,737 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 133 mSDsluCounter, 3362 mSDsCounter, 0 mSdLazyCounter, 9391 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 3432 SdHoareTripleChecker+Invalid, 9440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 9391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:26:35,737 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 3432 Invalid, 9440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 9391 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2024-11-28 04:26:35,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2024-11-28 04:26:35,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 263. [2024-11-28 04:26:35,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 261 states have (on average 1.0153256704980842) internal successors, (265), 262 states have internal predecessors, (265), 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) [2024-11-28 04:26:35,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 265 transitions. [2024-11-28 04:26:35,739 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 265 transitions. Word has length 250 [2024-11-28 04:26:35,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:26:35,740 INFO L471 AbstractCegarLoop]: Abstraction has 263 states and 265 transitions. [2024-11-28 04:26:35,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 4.630952380952381) internal successors, (389), 84 states have internal predecessors, (389), 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) [2024-11-28 04:26:35,740 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 265 transitions. [2024-11-28 04:26:35,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2024-11-28 04:26:35,741 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:26:35,741 INFO L218 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:26:35,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2024-11-28 04:26:35,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:26:35,941 INFO L396 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:26:35,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:26:35,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1236481092, now seen corresponding path program 23 times [2024-11-28 04:26:35,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:26:35,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105637865] [2024-11-28 04:26:35,942 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:26:35,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:26:36,199 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2024-11-28 04:26:36,200 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:26:38,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1880 backedges. 435 proven. 949 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2024-11-28 04:26:38,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:26:38,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105637865] [2024-11-28 04:26:38,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105637865] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:26:38,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332369011] [2024-11-28 04:26:38,952 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:26:38,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:26:38,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:26:38,954 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:26:38,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-11-28 04:26:48,110 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2024-11-28 04:26:48,110 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:26:48,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 1191 conjuncts, 164 conjuncts are in the unsatisfiable core [2024-11-28 04:26:48,138 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:26:48,150 INFO L378 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 1 [2024-11-28 04:26:49,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1880 backedges. 435 proven. 949 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2024-11-28 04:26:49,935 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:26:53,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1880 backedges. 435 proven. 949 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2024-11-28 04:26:53,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332369011] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:26:53,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:26:53,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 38, 38] total 97 [2024-11-28 04:26:53,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94431959] [2024-11-28 04:26:53,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:26:53,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2024-11-28 04:26:53,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:26:53,966 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2024-11-28 04:26:53,966 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1315, Invalid=8191, Unknown=0, NotChecked=0, Total=9506 [2024-11-28 04:26:53,967 INFO L87 Difference]: Start difference. First operand 263 states and 265 transitions. Second operand has 98 states, 97 states have (on average 4.845360824742268) internal successors, (470), 98 states have internal predecessors, (470), 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) [2024-11-28 04:26:57,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:26:57,337 INFO L93 Difference]: Finished difference Result 265 states and 267 transitions. [2024-11-28 04:26:57,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-28 04:26:57,338 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 97 states have (on average 4.845360824742268) internal successors, (470), 98 states have internal predecessors, (470), 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 256 [2024-11-28 04:26:57,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:26:57,339 INFO L225 Difference]: With dead ends: 265 [2024-11-28 04:26:57,339 INFO L226 Difference]: Without dead ends: 265 [2024-11-28 04:26:57,339 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4636 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1573, Invalid=11537, Unknown=0, NotChecked=0, Total=13110 [2024-11-28 04:26:57,340 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 6 mSDsluCounter, 2007 mSDsCounter, 0 mSdLazyCounter, 3510 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2087 SdHoareTripleChecker+Invalid, 3510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:26:57,340 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 2087 Invalid, 3510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3510 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-28 04:26:57,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2024-11-28 04:26:57,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2024-11-28 04:26:57,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 263 states have (on average 1.015209125475285) internal successors, (267), 264 states have internal predecessors, (267), 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) [2024-11-28 04:26:57,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 267 transitions. [2024-11-28 04:26:57,343 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 267 transitions. Word has length 256 [2024-11-28 04:26:57,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:26:57,343 INFO L471 AbstractCegarLoop]: Abstraction has 265 states and 267 transitions. [2024-11-28 04:26:57,344 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 97 states have (on average 4.845360824742268) internal successors, (470), 98 states have internal predecessors, (470), 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) [2024-11-28 04:26:57,344 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 267 transitions. [2024-11-28 04:26:57,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2024-11-28 04:26:57,345 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:26:57,345 INFO L218 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:26:57,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2024-11-28 04:26:57,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:26:57,546 INFO L396 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:26:57,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:26:57,547 INFO L85 PathProgramCache]: Analyzing trace with hash -5110913, now seen corresponding path program 31 times [2024-11-28 04:26:57,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:26:57,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116145012] [2024-11-28 04:26:57,547 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:26:57,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:26:57,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:27:00,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1961 backedges. 33 proven. 1432 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2024-11-28 04:27:00,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:27:00,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116145012] [2024-11-28 04:27:00,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116145012] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:27:00,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34911622] [2024-11-28 04:27:00,984 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:27:00,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:27:00,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:27:00,986 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:27:00,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-11-28 04:27:01,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:27:01,861 INFO L256 TraceCheckSpWp]: Trace formula consists of 1219 conjuncts, 324 conjuncts are in the unsatisfiable core [2024-11-28 04:27:01,868 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:27:03,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 04:27:05,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1961 backedges. 33 proven. 1432 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2024-11-28 04:27:05,401 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:27:05,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-28 04:27:05,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 04:27:05,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 04:27:06,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1961 backedges. 33 proven. 1432 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2024-11-28 04:27:06,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34911622] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:27:06,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:27:06,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 44, 44] total 86 [2024-11-28 04:27:06,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870686280] [2024-11-28 04:27:06,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:27:06,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-11-28 04:27:06,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:27:06,351 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-11-28 04:27:06,352 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=7125, Unknown=0, NotChecked=0, Total=7310 [2024-11-28 04:27:06,352 INFO L87 Difference]: Start difference. First operand 265 states and 267 transitions. Second operand has 86 states, 86 states have (on average 4.686046511627907) internal successors, (403), 86 states have internal predecessors, (403), 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) [2024-11-28 04:27:20,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:27:20,640 INFO L93 Difference]: Finished difference Result 717 states and 722 transitions. [2024-11-28 04:27:20,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2024-11-28 04:27:20,640 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 4.686046511627907) internal successors, (403), 86 states have internal predecessors, (403), 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 261 [2024-11-28 04:27:20,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:27:20,641 INFO L225 Difference]: With dead ends: 717 [2024-11-28 04:27:20,642 INFO L226 Difference]: Without dead ends: 279 [2024-11-28 04:27:20,644 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 650 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4262 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=630, Invalid=29820, Unknown=0, NotChecked=0, Total=30450 [2024-11-28 04:27:20,644 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 76 mSDsluCounter, 5692 mSDsCounter, 0 mSdLazyCounter, 15287 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 5766 SdHoareTripleChecker+Invalid, 15319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 15287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:27:20,644 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 5766 Invalid, 15319 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [32 Valid, 15287 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2024-11-28 04:27:20,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2024-11-28 04:27:20,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 273. [2024-11-28 04:27:20,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 271 states have (on average 1.014760147601476) internal successors, (275), 272 states have internal predecessors, (275), 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) [2024-11-28 04:27:20,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 275 transitions. [2024-11-28 04:27:20,648 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 275 transitions. Word has length 261 [2024-11-28 04:27:20,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:27:20,649 INFO L471 AbstractCegarLoop]: Abstraction has 273 states and 275 transitions. [2024-11-28 04:27:20,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 4.686046511627907) internal successors, (403), 86 states have internal predecessors, (403), 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) [2024-11-28 04:27:20,649 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 275 transitions. [2024-11-28 04:27:20,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2024-11-28 04:27:20,650 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:27:20,650 INFO L218 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:27:20,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2024-11-28 04:27:20,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:27:20,851 INFO L396 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:27:20,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:27:20,851 INFO L85 PathProgramCache]: Analyzing trace with hash -519075571, now seen corresponding path program 32 times [2024-11-28 04:27:20,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:27:20,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092908976] [2024-11-28 04:27:20,852 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:27:20,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:27:20,938 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:27:20,938 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:27:23,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2091 backedges. 435 proven. 1095 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2024-11-28 04:27:23,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:27:23,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092908976] [2024-11-28 04:27:23,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092908976] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:27:23,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929629807] [2024-11-28 04:27:23,584 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:27:23,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:27:23,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:27:23,586 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:27:23,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2024-11-28 04:27:24,149 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:27:24,149 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:27:24,156 INFO L256 TraceCheckSpWp]: Trace formula consists of 1245 conjuncts, 164 conjuncts are in the unsatisfiable core [2024-11-28 04:27:24,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:27:25,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2091 backedges. 496 proven. 1034 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2024-11-28 04:27:25,525 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:27:27,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 04:27:27,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2091 backedges. 496 proven. 1034 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2024-11-28 04:27:27,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929629807] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:27:27,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:27:27,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 80 [2024-11-28 04:27:27,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090768068] [2024-11-28 04:27:27,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:27:27,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2024-11-28 04:27:27,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:27:27,823 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2024-11-28 04:27:27,823 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=751, Invalid=5729, Unknown=0, NotChecked=0, Total=6480 [2024-11-28 04:27:27,824 INFO L87 Difference]: Start difference. First operand 273 states and 275 transitions. Second operand has 81 states, 80 states have (on average 5.1875) internal successors, (415), 81 states have internal predecessors, (415), 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) [2024-11-28 04:27:30,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:27:30,065 INFO L93 Difference]: Finished difference Result 282 states and 284 transitions. [2024-11-28 04:27:30,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-28 04:27:30,066 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 80 states have (on average 5.1875) internal successors, (415), 81 states have internal predecessors, (415), 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 269 [2024-11-28 04:27:30,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:27:30,067 INFO L225 Difference]: With dead ends: 282 [2024-11-28 04:27:30,067 INFO L226 Difference]: Without dead ends: 282 [2024-11-28 04:27:30,068 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 478 SyntacticMatches, 18 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3423 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=811, Invalid=5995, Unknown=0, NotChecked=0, Total=6806 [2024-11-28 04:27:30,068 INFO L435 NwaCegarLoop]: 83 mSDtfsCounter, 10 mSDsluCounter, 2203 mSDsCounter, 0 mSdLazyCounter, 3885 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 2286 SdHoareTripleChecker+Invalid, 3887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:27:30,068 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 2286 Invalid, 3887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3885 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-28 04:27:30,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2024-11-28 04:27:30,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 278. [2024-11-28 04:27:30,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 276 states have (on average 1.0144927536231885) internal successors, (280), 277 states have internal predecessors, (280), 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) [2024-11-28 04:27:30,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 280 transitions. [2024-11-28 04:27:30,076 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 280 transitions. Word has length 269 [2024-11-28 04:27:30,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:27:30,076 INFO L471 AbstractCegarLoop]: Abstraction has 278 states and 280 transitions. [2024-11-28 04:27:30,076 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 80 states have (on average 5.1875) internal successors, (415), 81 states have internal predecessors, (415), 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) [2024-11-28 04:27:30,076 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 280 transitions. [2024-11-28 04:27:30,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2024-11-28 04:27:30,078 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:27:30,078 INFO L218 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:27:30,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2024-11-28 04:27:30,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:27:30,279 INFO L396 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:27:30,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:27:30,279 INFO L85 PathProgramCache]: Analyzing trace with hash -615417074, now seen corresponding path program 24 times [2024-11-28 04:27:30,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:27:30,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021466632] [2024-11-28 04:27:30,279 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:27:30,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:27:30,501 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2024-11-28 04:27:30,501 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:27:33,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2125 backedges. 435 proven. 1129 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2024-11-28 04:27:33,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:27:33,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021466632] [2024-11-28 04:27:33,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021466632] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:27:33,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497339918] [2024-11-28 04:27:33,338 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:27:33,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:27:33,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:27:33,340 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:27:33,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2024-11-28 04:28:24,399 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2024-11-28 04:28:24,399 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:28:24,442 INFO L256 TraceCheckSpWp]: Trace formula consists of 1259 conjuncts, 136 conjuncts are in the unsatisfiable core [2024-11-28 04:28:24,446 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:28:25,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2125 backedges. 496 proven. 1068 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2024-11-28 04:28:25,566 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:28:27,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-28 04:28:28,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2125 backedges. 496 proven. 1068 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2024-11-28 04:28:28,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497339918] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:28:28,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:28:28,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 40, 40] total 86 [2024-11-28 04:28:28,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325813566] [2024-11-28 04:28:28,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:28:28,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2024-11-28 04:28:28,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:28:28,106 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2024-11-28 04:28:28,107 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1141, Invalid=6341, Unknown=0, NotChecked=0, Total=7482 [2024-11-28 04:28:28,107 INFO L87 Difference]: Start difference. First operand 278 states and 280 transitions. Second operand has 87 states, 86 states have (on average 4.906976744186046) internal successors, (422), 87 states have internal predecessors, (422), 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) [2024-11-28 04:28:30,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:28:30,485 INFO L93 Difference]: Finished difference Result 280 states and 282 transitions. [2024-11-28 04:28:30,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-11-28 04:28:30,486 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 4.906976744186046) internal successors, (422), 87 states have internal predecessors, (422), 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 271 [2024-11-28 04:28:30,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:28:30,487 INFO L225 Difference]: With dead ends: 280 [2024-11-28 04:28:30,487 INFO L226 Difference]: Without dead ends: 280 [2024-11-28 04:28:30,488 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 481 SyntacticMatches, 18 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6895 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=2349, Invalid=12171, Unknown=0, NotChecked=0, Total=14520 [2024-11-28 04:28:30,488 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 04:28:30,488 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 547 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1159 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 04:28:30,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2024-11-28 04:28:30,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2024-11-28 04:28:30,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 278 states have (on average 1.014388489208633) internal successors, (282), 279 states have internal predecessors, (282), 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) [2024-11-28 04:28:30,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 282 transitions. [2024-11-28 04:28:30,493 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 282 transitions. Word has length 271 [2024-11-28 04:28:30,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:28:30,493 INFO L471 AbstractCegarLoop]: Abstraction has 280 states and 282 transitions. [2024-11-28 04:28:30,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 86 states have (on average 4.906976744186046) internal successors, (422), 87 states have internal predecessors, (422), 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) [2024-11-28 04:28:30,494 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 282 transitions. [2024-11-28 04:28:30,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2024-11-28 04:28:30,495 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:28:30,495 INFO L218 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:28:30,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2024-11-28 04:28:30,695 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:28:30,696 INFO L396 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:28:30,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:28:30,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1933415691, now seen corresponding path program 33 times [2024-11-28 04:28:30,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:28:30,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124636963] [2024-11-28 04:28:30,696 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:28:30,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:28:31,071 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2024-11-28 04:28:31,072 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:28:38,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 35 proven. 1615 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2024-11-28 04:28:38,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:28:38,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124636963] [2024-11-28 04:28:38,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124636963] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:28:38,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707869130] [2024-11-28 04:28:38,862 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:28:38,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:28:38,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:28:38,865 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:28:38,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2024-11-28 04:28:55,867 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2024-11-28 04:28:55,867 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:28:55,886 INFO L256 TraceCheckSpWp]: Trace formula consists of 1287 conjuncts, 351 conjuncts are in the unsatisfiable core [2024-11-28 04:28:55,891 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:28:58,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 04:29:05,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 35 proven. 1615 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2024-11-28 04:29:05,029 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:29:05,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-28 04:29:09,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 04:29:09,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 04:29:12,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 35 proven. 1615 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2024-11-28 04:29:12,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707869130] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:29:12,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:29:12,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 64, 46] total 171 [2024-11-28 04:29:12,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347695307] [2024-11-28 04:29:12,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:29:12,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 171 states [2024-11-28 04:29:12,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:29:12,774 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2024-11-28 04:29:12,777 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=28602, Unknown=0, NotChecked=0, Total=29070 [2024-11-28 04:29:12,777 INFO L87 Difference]: Start difference. First operand 280 states and 282 transitions. Second operand has 171 states, 171 states have (on average 3.6315789473684212) internal successors, (621), 171 states have internal predecessors, (621), 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) [2024-11-28 04:29:40,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:29:40,601 INFO L93 Difference]: Finished difference Result 758 states and 763 transitions. [2024-11-28 04:29:40,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2024-11-28 04:29:40,602 INFO L78 Accepts]: Start accepts. Automaton has has 171 states, 171 states have (on average 3.6315789473684212) internal successors, (621), 171 states have internal predecessors, (621), 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 276 [2024-11-28 04:29:40,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:29:40,603 INFO L225 Difference]: With dead ends: 758 [2024-11-28 04:29:40,603 INFO L226 Difference]: Without dead ends: 294 [2024-11-28 04:29:40,606 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 720 GetRequests, 449 SyntacticMatches, 0 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10054 ImplicationChecksByTransitivity, 32.2s TimeCoverageRelationStatistics Valid=1174, Invalid=73082, Unknown=0, NotChecked=0, Total=74256 [2024-11-28 04:29:40,607 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 89 mSDsluCounter, 10013 mSDsCounter, 0 mSdLazyCounter, 26707 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 10092 SdHoareTripleChecker+Invalid, 26743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 26707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:29:40,607 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 10092 Invalid, 26743 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [36 Valid, 26707 Invalid, 0 Unknown, 0 Unchecked, 14.4s Time] [2024-11-28 04:29:40,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2024-11-28 04:29:40,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 288. [2024-11-28 04:29:40,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 286 states have (on average 1.013986013986014) internal successors, (290), 287 states have internal predecessors, (290), 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) [2024-11-28 04:29:40,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 290 transitions. [2024-11-28 04:29:40,611 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 290 transitions. Word has length 276 [2024-11-28 04:29:40,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:29:40,611 INFO L471 AbstractCegarLoop]: Abstraction has 288 states and 290 transitions. [2024-11-28 04:29:40,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 171 states, 171 states have (on average 3.6315789473684212) internal successors, (621), 171 states have internal predecessors, (621), 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) [2024-11-28 04:29:40,612 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 290 transitions. [2024-11-28 04:29:40,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2024-11-28 04:29:40,613 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:29:40,613 INFO L218 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:29:40,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2024-11-28 04:29:40,814 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:29:40,815 INFO L396 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:29:40,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:29:40,815 INFO L85 PathProgramCache]: Analyzing trace with hash -501303385, now seen corresponding path program 34 times [2024-11-28 04:29:40,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:29:40,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136420274] [2024-11-28 04:29:40,816 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:29:40,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:29:40,973 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:29:40,974 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:29:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2349 backedges. 561 proven. 1158 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2024-11-28 04:29:44,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:29:44,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136420274] [2024-11-28 04:29:44,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136420274] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:29:44,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575788544] [2024-11-28 04:29:44,152 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:29:44,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:29:44,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:29:44,155 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:29:44,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2024-11-28 04:29:47,449 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:29:47,449 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:29:47,463 INFO L256 TraceCheckSpWp]: Trace formula consists of 1313 conjuncts, 177 conjuncts are in the unsatisfiable core [2024-11-28 04:29:47,466 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:29:49,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2349 backedges. 561 proven. 1158 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2024-11-28 04:29:49,887 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:29:51,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-28 04:29:54,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2349 backedges. 561 proven. 1158 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2024-11-28 04:29:54,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575788544] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:29:54,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:29:54,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 101 [2024-11-28 04:29:54,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189581658] [2024-11-28 04:29:54,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:29:54,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2024-11-28 04:29:54,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:29:54,092 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2024-11-28 04:29:54,093 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1371, Invalid=8931, Unknown=0, NotChecked=0, Total=10302 [2024-11-28 04:29:54,093 INFO L87 Difference]: Start difference. First operand 288 states and 290 transitions. Second operand has 102 states, 101 states have (on average 5.128712871287129) internal successors, (518), 102 states have internal predecessors, (518), 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) [2024-11-28 04:29:57,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:29:57,211 INFO L93 Difference]: Finished difference Result 297 states and 299 transitions. [2024-11-28 04:29:57,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-28 04:29:57,212 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 101 states have (on average 5.128712871287129) internal successors, (518), 102 states have internal predecessors, (518), 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 284 [2024-11-28 04:29:57,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:29:57,213 INFO L225 Difference]: With dead ends: 297 [2024-11-28 04:29:57,213 INFO L226 Difference]: Without dead ends: 297 [2024-11-28 04:29:57,213 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 609 GetRequests, 507 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2924 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1452, Invalid=9260, Unknown=0, NotChecked=0, Total=10712 [2024-11-28 04:29:57,214 INFO L435 NwaCegarLoop]: 87 mSDtfsCounter, 14 mSDsluCounter, 2656 mSDsCounter, 0 mSdLazyCounter, 4513 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2743 SdHoareTripleChecker+Invalid, 4514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-28 04:29:57,214 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 2743 Invalid, 4514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4513 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-11-28 04:29:57,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2024-11-28 04:29:57,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 293. [2024-11-28 04:29:57,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 291 states have (on average 1.013745704467354) internal successors, (295), 292 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:29:57,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 295 transitions. [2024-11-28 04:29:57,218 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 295 transitions. Word has length 284 [2024-11-28 04:29:57,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:29:57,218 INFO L471 AbstractCegarLoop]: Abstraction has 293 states and 295 transitions. [2024-11-28 04:29:57,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 101 states have (on average 5.128712871287129) internal successors, (518), 102 states have internal predecessors, (518), 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) [2024-11-28 04:29:57,219 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 295 transitions. [2024-11-28 04:29:57,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2024-11-28 04:29:57,220 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:29:57,220 INFO L218 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:29:57,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2024-11-28 04:29:57,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2024-11-28 04:29:57,421 INFO L396 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:29:57,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:29:57,422 INFO L85 PathProgramCache]: Analyzing trace with hash -716215512, now seen corresponding path program 25 times [2024-11-28 04:29:57,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:29:57,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442918072] [2024-11-28 04:29:57,422 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:29:57,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:29:57,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:30:01,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2385 backedges. 496 proven. 1259 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2024-11-28 04:30:01,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:30:01,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442918072] [2024-11-28 04:30:01,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442918072] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:30:01,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083382897] [2024-11-28 04:30:01,069 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:30:01,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:30:01,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:30:01,074 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:30:01,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2024-11-28 04:30:01,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:30:01,784 INFO L256 TraceCheckSpWp]: Trace formula consists of 1327 conjuncts, 177 conjuncts are in the unsatisfiable core [2024-11-28 04:30:01,788 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:30:03,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2385 backedges. 561 proven. 1194 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2024-11-28 04:30:03,456 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:30:05,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 04:30:06,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2385 backedges. 561 proven. 1194 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2024-11-28 04:30:06,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083382897] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:30:06,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:30:06,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 87 [2024-11-28 04:30:06,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227255606] [2024-11-28 04:30:06,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:30:06,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2024-11-28 04:30:06,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:30:06,451 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2024-11-28 04:30:06,452 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=874, Invalid=6782, Unknown=0, NotChecked=0, Total=7656 [2024-11-28 04:30:06,452 INFO L87 Difference]: Start difference. First operand 293 states and 295 transitions. Second operand has 88 states, 87 states have (on average 5.0344827586206895) internal successors, (438), 88 states have internal predecessors, (438), 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) [2024-11-28 04:30:10,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:30:10,188 INFO L93 Difference]: Finished difference Result 295 states and 297 transitions. [2024-11-28 04:30:10,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-11-28 04:30:10,188 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 87 states have (on average 5.0344827586206895) internal successors, (438), 88 states have internal predecessors, (438), 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 286 [2024-11-28 04:30:10,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:30:10,189 INFO L225 Difference]: With dead ends: 295 [2024-11-28 04:30:10,190 INFO L226 Difference]: Without dead ends: 295 [2024-11-28 04:30:10,190 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 632 GetRequests, 508 SyntacticMatches, 19 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5074 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1160, Invalid=10182, Unknown=0, NotChecked=0, Total=11342 [2024-11-28 04:30:10,191 INFO L435 NwaCegarLoop]: 88 mSDtfsCounter, 3 mSDsluCounter, 2497 mSDsCounter, 0 mSdLazyCounter, 4368 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 2585 SdHoareTripleChecker+Invalid, 4368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-28 04:30:10,191 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 2585 Invalid, 4368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4368 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-28 04:30:10,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2024-11-28 04:30:10,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2024-11-28 04:30:10,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 293 states have (on average 1.0136518771331058) internal successors, (297), 294 states have internal predecessors, (297), 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) [2024-11-28 04:30:10,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 297 transitions. [2024-11-28 04:30:10,195 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 297 transitions. Word has length 286 [2024-11-28 04:30:10,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:30:10,196 INFO L471 AbstractCegarLoop]: Abstraction has 295 states and 297 transitions. [2024-11-28 04:30:10,196 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 87 states have (on average 5.0344827586206895) internal successors, (438), 88 states have internal predecessors, (438), 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) [2024-11-28 04:30:10,197 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 297 transitions. [2024-11-28 04:30:10,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2024-11-28 04:30:10,198 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:30:10,199 INFO L218 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:30:10,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2024-11-28 04:30:10,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2024-11-28 04:30:10,399 INFO L396 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 04:30:10,401 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:30:10,401 INFO L85 PathProgramCache]: Analyzing trace with hash 5798683, now seen corresponding path program 35 times [2024-11-28 04:30:10,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:30:10,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313671629] [2024-11-28 04:30:10,401 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:30:10,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:30:10,777 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2024-11-28 04:30:10,777 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:30:14,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2476 backedges. 37 proven. 1809 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2024-11-28 04:30:14,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:30:14,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313671629] [2024-11-28 04:30:14,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313671629] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:30:14,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167838333] [2024-11-28 04:30:14,645 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:30:14,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:30:14,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:30:14,647 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:30:14,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84fc395b-8982-45f6-8b23-5d86212b3a67/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2024-11-28 04:30:25,709 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2024-11-28 04:30:25,709 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:30:25,734 INFO L256 TraceCheckSpWp]: Trace formula consists of 1355 conjuncts, 409 conjuncts are in the unsatisfiable core [2024-11-28 04:30:25,740 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:30:29,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-28 04:30:29,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 04:30:34,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2476 backedges. 37 proven. 2439 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:30:34,529 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:30:41,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-11-28 04:30:41,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2024-11-28 04:30:41,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-28 04:30:44,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2476 backedges. 37 proven. 1809 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2024-11-28 04:30:44,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167838333] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:30:44,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:30:44,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 85, 67] total 190 [2024-11-28 04:30:44,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771805277] [2024-11-28 04:30:44,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:30:44,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 190 states [2024-11-28 04:30:44,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:30:44,637 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2024-11-28 04:30:44,638 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=35319, Unknown=0, NotChecked=0, Total=35910 [2024-11-28 04:30:44,638 INFO L87 Difference]: Start difference. First operand 295 states and 297 transitions. Second operand has 190 states, 190 states have (on average 3.8) internal successors, (722), 190 states have internal predecessors, (722), 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)