./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/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_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2a46b64c20324a7544dfe7936b5f39eaa32bba659068797748195a7f292bdaee --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 19:49:19,762 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 19:49:19,855 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-27 19:49:19,860 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 19:49:19,860 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 19:49:19,902 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 19:49:19,903 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 19:49:19,903 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 19:49:19,904 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 19:49:19,904 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 19:49:19,905 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 19:49:19,905 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 19:49:19,906 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 19:49:19,906 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 19:49:19,906 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 19:49:19,906 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 19:49:19,907 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 19:49:19,907 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 19:49:19,907 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 19:49:19,907 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 19:49:19,907 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 19:49:19,907 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 19:49:19,908 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 19:49:19,908 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 19:49:19,908 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 19:49:19,908 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 19:49:19,908 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 19:49:19,908 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 19:49:19,908 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 19:49:19,908 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 19:49:19,909 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 19:49:19,909 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 19:49:19,909 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:49:19,910 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 19:49:19,910 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 19:49:19,910 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 19:49:19,910 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 19:49:19,910 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:49:19,910 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 19:49:19,911 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 19:49:19,911 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 19:49:19,911 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 19:49:19,911 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 19:49:19,911 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 19:49:19,911 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 19:49:19,911 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 19:49:19,911 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 19:49:19,911 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 19:49:19,912 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_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/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 ! call(reach_error())) ) 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 -> 2a46b64c20324a7544dfe7936b5f39eaa32bba659068797748195a7f292bdaee [2024-11-27 19:49:20,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 19:49:20,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 19:49:20,233 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 19:49:20,235 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 19:49:20,236 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 19:49:20,238 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c [2024-11-27 19:49:23,139 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/data/65b82a909/488c4e42f272409db050f87df4faa79c/FLAGdf44e2a52 [2024-11-27 19:49:23,421 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 19:49:23,422 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c [2024-11-27 19:49:23,431 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/data/65b82a909/488c4e42f272409db050f87df4faa79c/FLAGdf44e2a52 [2024-11-27 19:49:23,467 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/data/65b82a909/488c4e42f272409db050f87df4faa79c [2024-11-27 19:49:23,469 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 19:49:23,472 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 19:49:23,473 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 19:49:23,474 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 19:49:23,478 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 19:49:23,479 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 07:49:23" (1/1) ... [2024-11-27 19:49:23,480 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@432f6984 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:23, skipping insertion in model container [2024-11-27 19:49:23,480 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 07:49:23" (1/1) ... [2024-11-27 19:49:23,494 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 19:49:23,663 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c[416,429] [2024-11-27 19:49:23,693 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 19:49:23,701 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 19:49:23,715 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c[416,429] [2024-11-27 19:49:23,730 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 19:49:23,750 INFO L204 MainTranslator]: Completed translation [2024-11-27 19:49:23,750 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:23 WrapperNode [2024-11-27 19:49:23,752 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 19:49:23,753 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 19:49:23,753 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 19:49:23,754 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 19:49:23,763 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:23" (1/1) ... [2024-11-27 19:49:23,773 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:23" (1/1) ... [2024-11-27 19:49:23,793 INFO L138 Inliner]: procedures = 15, calls = 21, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 80 [2024-11-27 19:49:23,793 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 19:49:23,795 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 19:49:23,796 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 19:49:23,796 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 19:49:23,804 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:23" (1/1) ... [2024-11-27 19:49:23,804 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:23" (1/1) ... [2024-11-27 19:49:23,806 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:23" (1/1) ... [2024-11-27 19:49:23,830 INFO L175 MemorySlicer]: Split 7 memory accesses to 3 slices as follows [2, 3, 2]. 43 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-11-27 19:49:23,830 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:23" (1/1) ... [2024-11-27 19:49:23,831 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:23" (1/1) ... [2024-11-27 19:49:23,838 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:23" (1/1) ... [2024-11-27 19:49:23,843 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:23" (1/1) ... [2024-11-27 19:49:23,850 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:23" (1/1) ... [2024-11-27 19:49:23,851 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:23" (1/1) ... [2024-11-27 19:49:23,852 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:23" (1/1) ... [2024-11-27 19:49:23,853 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 19:49:23,854 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 19:49:23,854 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 19:49:23,854 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 19:49:23,855 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:23" (1/1) ... [2024-11-27 19:49:23,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:49:23,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:49:23,890 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 19:49:23,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 19:49:23,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 19:49:23,918 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-27 19:49:23,918 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-27 19:49:23,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 19:49:23,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-27 19:49:23,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-27 19:49:23,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-27 19:49:23,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-27 19:49:23,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-27 19:49:23,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-27 19:49:23,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 19:49:23,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 19:49:23,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-27 19:49:23,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-27 19:49:23,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-27 19:49:23,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-27 19:49:23,995 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 19:49:23,997 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 19:49:24,182 INFO L? ?]: Removed 19 outVars from TransFormulas that were not future-live. [2024-11-27 19:49:24,182 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 19:49:24,192 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 19:49:24,192 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-27 19:49:24,192 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 07:49:24 BoogieIcfgContainer [2024-11-27 19:49:24,192 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 19:49:24,195 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 19:49:24,195 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 19:49:24,200 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 19:49:24,200 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 07:49:23" (1/3) ... [2024-11-27 19:49:24,201 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cfdb475 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 07:49:24, skipping insertion in model container [2024-11-27 19:49:24,201 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:23" (2/3) ... [2024-11-27 19:49:24,201 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cfdb475 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 07:49:24, skipping insertion in model container [2024-11-27 19:49:24,201 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 07:49:24" (3/3) ... [2024-11-27 19:49:24,202 INFO L128 eAbstractionObserver]: Analyzing ICFG copy-partial-2-n-u.c [2024-11-27 19:49:24,218 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 19:49:24,219 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG copy-partial-2-n-u.c that has 2 procedures, 34 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2024-11-27 19:49:24,285 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 19:49:24,299 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=LoopHeads, 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;@5e1a5be2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 19:49:24,299 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-27 19:49:24,304 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 30 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 19:49:24,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-27 19:49:24,311 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:49:24,311 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] [2024-11-27 19:49:24,312 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:49:24,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:24,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1982306888, now seen corresponding path program 1 times [2024-11-27 19:49:24,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:24,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772118392] [2024-11-27 19:49:24,325 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:24,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:24,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:24,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 19:49:24,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:24,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772118392] [2024-11-27 19:49:24,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772118392] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:49:24,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983839413] [2024-11-27 19:49:24,526 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:24,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:49:24,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:49:24,530 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:49:24,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 19:49:24,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:24,635 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-27 19:49:24,642 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:49:24,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 19:49:24,652 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:49:24,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983839413] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:49:24,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 19:49:24,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-11-27 19:49:24,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550740534] [2024-11-27 19:49:24,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:49:24,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-27 19:49:24,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:24,681 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-27 19:49:24,681 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-27 19:49:24,683 INFO L87 Difference]: Start difference. First operand has 34 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 30 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 19:49:24,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:49:24,699 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2024-11-27 19:49:24,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-27 19:49:24,701 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2024-11-27 19:49:24,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:49:24,707 INFO L225 Difference]: With dead ends: 65 [2024-11-27 19:49:24,707 INFO L226 Difference]: Without dead ends: 30 [2024-11-27 19:49:24,711 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-27 19:49:24,716 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 19:49:24,717 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 19:49:24,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-27 19:49:24,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-27 19:49:24,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 19:49:24,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2024-11-27 19:49:24,755 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 23 [2024-11-27 19:49:24,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:49:24,756 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2024-11-27 19:49:24,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 19:49:24,756 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2024-11-27 19:49:24,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-27 19:49:24,757 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:49:24,757 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] [2024-11-27 19:49:24,764 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-27 19:49:24,958 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:49:24,958 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:49:24,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:24,959 INFO L85 PathProgramCache]: Analyzing trace with hash -387400584, now seen corresponding path program 1 times [2024-11-27 19:49:24,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:24,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700406270] [2024-11-27 19:49:24,959 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:24,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:25,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:25,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 19:49:25,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:25,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700406270] [2024-11-27 19:49:25,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700406270] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:49:25,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:49:25,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 19:49:25,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774531413] [2024-11-27 19:49:25,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:49:25,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:49:25,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:25,219 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:49:25,219 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:49:25,219 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 19:49:25,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:49:25,268 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2024-11-27 19:49:25,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 19:49:25,269 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2024-11-27 19:49:25,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:49:25,269 INFO L225 Difference]: With dead ends: 51 [2024-11-27 19:49:25,270 INFO L226 Difference]: Without dead ends: 35 [2024-11-27 19:49:25,270 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 [2024-11-27 19:49:25,272 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 17 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 19:49:25,273 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 60 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 19:49:25,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-27 19:49:25,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2024-11-27 19:49:25,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 19:49:25,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2024-11-27 19:49:25,283 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 23 [2024-11-27 19:49:25,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:49:25,284 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2024-11-27 19:49:25,284 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 19:49:25,284 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2024-11-27 19:49:25,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-27 19:49:25,286 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:49:25,286 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] [2024-11-27 19:49:25,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 19:49:25,286 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:49:25,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:25,290 INFO L85 PathProgramCache]: Analyzing trace with hash 2143597122, now seen corresponding path program 1 times [2024-11-27 19:49:25,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:25,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537522782] [2024-11-27 19:49:25,290 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:25,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:25,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:25,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 19:49:25,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:25,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537522782] [2024-11-27 19:49:25,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537522782] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:49:25,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:49:25,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 19:49:25,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754597591] [2024-11-27 19:49:25,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:49:25,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:49:25,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:25,473 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:49:25,473 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:49:25,473 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 19:49:25,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:49:25,541 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2024-11-27 19:49:25,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 19:49:25,542 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2024-11-27 19:49:25,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:49:25,543 INFO L225 Difference]: With dead ends: 62 [2024-11-27 19:49:25,543 INFO L226 Difference]: Without dead ends: 41 [2024-11-27 19:49:25,544 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 [2024-11-27 19:49:25,544 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 43 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 19:49:25,545 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 46 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 19:49:25,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-27 19:49:25,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2024-11-27 19:49:25,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 19:49:25,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2024-11-27 19:49:25,553 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 27 [2024-11-27 19:49:25,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:49:25,553 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2024-11-27 19:49:25,554 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 19:49:25,554 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2024-11-27 19:49:25,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-27 19:49:25,555 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:49:25,555 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] [2024-11-27 19:49:25,555 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-27 19:49:25,555 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:49:25,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:25,556 INFO L85 PathProgramCache]: Analyzing trace with hash 2113219942, now seen corresponding path program 1 times [2024-11-27 19:49:25,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:25,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625550800] [2024-11-27 19:49:25,556 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:25,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:25,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:25,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 19:49:25,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:25,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625550800] [2024-11-27 19:49:25,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625550800] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:49:25,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:49:25,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 19:49:25,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009535427] [2024-11-27 19:49:25,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:49:25,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:49:25,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:25,722 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:49:25,723 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:49:25,723 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 19:49:25,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:49:25,807 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2024-11-27 19:49:25,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 19:49:25,807 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2024-11-27 19:49:25,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:49:25,808 INFO L225 Difference]: With dead ends: 61 [2024-11-27 19:49:25,808 INFO L226 Difference]: Without dead ends: 51 [2024-11-27 19:49:25,809 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 [2024-11-27 19:49:25,809 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 38 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 19:49:25,810 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 51 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 19:49:25,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-27 19:49:25,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 33. [2024-11-27 19:49:25,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 19:49:25,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2024-11-27 19:49:25,820 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 29 [2024-11-27 19:49:25,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:49:25,820 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2024-11-27 19:49:25,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 19:49:25,820 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2024-11-27 19:49:25,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-27 19:49:25,821 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:49:25,821 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] [2024-11-27 19:49:25,821 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-27 19:49:25,821 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:49:25,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:25,822 INFO L85 PathProgramCache]: Analyzing trace with hash 940725168, now seen corresponding path program 1 times [2024-11-27 19:49:25,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:25,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87787171] [2024-11-27 19:49:25,822 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:25,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:25,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:25,947 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 19:49:25,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:25,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87787171] [2024-11-27 19:49:25,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87787171] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:49:25,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:49:25,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 19:49:25,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772164796] [2024-11-27 19:49:25,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:49:25,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:49:25,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:25,948 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:49:25,948 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:49:25,949 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 19:49:26,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:49:26,013 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2024-11-27 19:49:26,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 19:49:26,015 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2024-11-27 19:49:26,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:49:26,016 INFO L225 Difference]: With dead ends: 57 [2024-11-27 19:49:26,016 INFO L226 Difference]: Without dead ends: 42 [2024-11-27 19:49:26,016 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 [2024-11-27 19:49:26,017 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 24 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 19:49:26,017 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 53 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 19:49:26,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-27 19:49:26,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2024-11-27 19:49:26,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 19:49:26,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2024-11-27 19:49:26,030 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 33 [2024-11-27 19:49:26,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:49:26,030 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2024-11-27 19:49:26,030 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 19:49:26,032 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2024-11-27 19:49:26,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-27 19:49:26,034 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:49:26,034 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] [2024-11-27 19:49:26,034 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-27 19:49:26,034 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:49:26,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:26,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1541059884, now seen corresponding path program 1 times [2024-11-27 19:49:26,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:26,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59484715] [2024-11-27 19:49:26,035 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:26,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:26,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:26,208 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 19:49:26,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:26,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59484715] [2024-11-27 19:49:26,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59484715] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:49:26,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573288218] [2024-11-27 19:49:26,210 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:26,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:49:26,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:49:26,212 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:49:26,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 19:49:26,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:26,310 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-27 19:49:26,312 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:49:26,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 19:49:26,415 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:49:26,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 19:49:26,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573288218] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:49:26,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:49:26,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-27 19:49:26,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958238482] [2024-11-27 19:49:26,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:49:26,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 19:49:26,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:26,503 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 19:49:26,504 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-11-27 19:49:26,504 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 19:49:26,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:49:26,692 INFO L93 Difference]: Finished difference Result 96 states and 116 transitions. [2024-11-27 19:49:26,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 19:49:26,693 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2024-11-27 19:49:26,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:49:26,695 INFO L225 Difference]: With dead ends: 96 [2024-11-27 19:49:26,695 INFO L226 Difference]: Without dead ends: 71 [2024-11-27 19:49:26,695 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2024-11-27 19:49:26,696 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 162 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 19:49:26,696 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 98 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 19:49:26,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-27 19:49:26,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 41. [2024-11-27 19:49:26,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 19:49:26,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2024-11-27 19:49:26,717 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 35 [2024-11-27 19:49:26,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:49:26,718 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2024-11-27 19:49:26,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 19:49:26,719 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2024-11-27 19:49:26,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-27 19:49:26,719 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:49:26,720 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:49:26,729 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-27 19:49:26,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-27 19:49:26,920 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:49:26,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:26,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1237113536, now seen corresponding path program 2 times [2024-11-27 19:49:26,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:26,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592392543] [2024-11-27 19:49:26,921 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:49:26,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:26,964 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:49:26,964 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:49:27,098 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-27 19:49:27,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:27,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592392543] [2024-11-27 19:49:27,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592392543] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:49:27,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517426464] [2024-11-27 19:49:27,099 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:49:27,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:49:27,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:49:27,103 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:49:27,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 19:49:27,199 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:49:27,199 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:49:27,201 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-27 19:49:27,202 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:49:27,333 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-27 19:49:27,334 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:49:27,427 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-27 19:49:27,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517426464] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:49:27,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:49:27,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-27 19:49:27,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584444900] [2024-11-27 19:49:27,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:49:27,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 19:49:27,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:27,429 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 19:49:27,429 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-11-27 19:49:27,430 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 19:49:27,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:49:27,627 INFO L93 Difference]: Finished difference Result 148 states and 171 transitions. [2024-11-27 19:49:27,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 19:49:27,627 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2024-11-27 19:49:27,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:49:27,629 INFO L225 Difference]: With dead ends: 148 [2024-11-27 19:49:27,629 INFO L226 Difference]: Without dead ends: 137 [2024-11-27 19:49:27,629 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2024-11-27 19:49:27,630 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 161 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 19:49:27,630 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 97 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 19:49:27,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-11-27 19:49:27,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 59. [2024-11-27 19:49:27,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 55 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 19:49:27,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2024-11-27 19:49:27,654 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 41 [2024-11-27 19:49:27,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:49:27,655 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2024-11-27 19:49:27,655 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 19:49:27,655 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2024-11-27 19:49:27,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-27 19:49:27,656 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:49:27,656 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:49:27,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-27 19:49:27,856 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-27 19:49:27,857 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:49:27,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:27,857 INFO L85 PathProgramCache]: Analyzing trace with hash 245889930, now seen corresponding path program 3 times [2024-11-27 19:49:27,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:27,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64111838] [2024-11-27 19:49:27,857 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:49:27,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:27,889 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 19:49:27,889 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:49:27,963 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-11-27 19:49:27,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:27,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64111838] [2024-11-27 19:49:27,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64111838] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:49:27,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372948953] [2024-11-27 19:49:27,964 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:49:27,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:49:27,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:49:27,966 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:49:27,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 19:49:28,054 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 19:49:28,054 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:49:28,056 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-27 19:49:28,057 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:49:28,164 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-11-27 19:49:28,164 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:49:28,241 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-11-27 19:49:28,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372948953] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:49:28,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:49:28,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-27 19:49:28,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618563542] [2024-11-27 19:49:28,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:49:28,242 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 19:49:28,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:28,243 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 19:49:28,243 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-11-27 19:49:28,243 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 19:49:28,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:49:28,360 INFO L93 Difference]: Finished difference Result 132 states and 153 transitions. [2024-11-27 19:49:28,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 19:49:28,361 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2024-11-27 19:49:28,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:49:28,363 INFO L225 Difference]: With dead ends: 132 [2024-11-27 19:49:28,363 INFO L226 Difference]: Without dead ends: 95 [2024-11-27 19:49:28,364 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2024-11-27 19:49:28,365 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 48 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 19:49:28,365 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 101 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 19:49:28,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-27 19:49:28,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2024-11-27 19:49:28,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 91 states have (on average 1.1318681318681318) internal successors, (103), 91 states have internal predecessors, (103), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 19:49:28,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2024-11-27 19:49:28,407 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 59 [2024-11-27 19:49:28,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:49:28,407 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2024-11-27 19:49:28,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 19:49:28,407 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2024-11-27 19:49:28,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-27 19:49:28,410 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:49:28,410 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:49:28,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-27 19:49:28,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:49:28,611 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:49:28,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:28,611 INFO L85 PathProgramCache]: Analyzing trace with hash 329747608, now seen corresponding path program 4 times [2024-11-27 19:49:28,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:28,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421824212] [2024-11-27 19:49:28,612 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 19:49:28,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:28,664 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 19:49:28,664 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:49:29,179 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 35 proven. 288 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-11-27 19:49:29,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:29,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421824212] [2024-11-27 19:49:29,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421824212] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:49:29,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63237150] [2024-11-27 19:49:29,180 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 19:49:29,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:49:29,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:49:29,182 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:49:29,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 19:49:29,296 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 19:49:29,296 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:49:29,297 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-27 19:49:29,300 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:49:29,868 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 52 proven. 271 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-11-27 19:49:29,868 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:49:30,478 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 52 proven. 271 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-11-27 19:49:30,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63237150] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:49:30,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:49:30,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2024-11-27 19:49:30,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426903946] [2024-11-27 19:49:30,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:49:30,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-27 19:49:30,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:30,484 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-27 19:49:30,484 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=772, Unknown=0, NotChecked=0, Total=992 [2024-11-27 19:49:30,484 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand has 32 states, 32 states have (on average 4.625) internal successors, (148), 30 states have internal predecessors, (148), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-27 19:49:30,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:49:30,782 INFO L93 Difference]: Finished difference Result 157 states and 178 transitions. [2024-11-27 19:49:30,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-27 19:49:30,782 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.625) internal successors, (148), 30 states have internal predecessors, (148), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 95 [2024-11-27 19:49:30,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:49:30,783 INFO L225 Difference]: With dead ends: 157 [2024-11-27 19:49:30,783 INFO L226 Difference]: Without dead ends: 120 [2024-11-27 19:49:30,784 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 170 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2024-11-27 19:49:30,785 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 34 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 19:49:30,785 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 300 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 19:49:30,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-27 19:49:30,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 107. [2024-11-27 19:49:30,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 103 states have (on average 1.1262135922330097) internal successors, (116), 103 states have internal predecessors, (116), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 19:49:30,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 120 transitions. [2024-11-27 19:49:30,811 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 120 transitions. Word has length 95 [2024-11-27 19:49:30,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:49:30,812 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 120 transitions. [2024-11-27 19:49:30,812 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.625) internal successors, (148), 30 states have internal predecessors, (148), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-27 19:49:30,812 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 120 transitions. [2024-11-27 19:49:30,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-27 19:49:30,813 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:49:30,813 INFO L218 NwaCegarLoop]: trace histogram [20, 20, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:49:30,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-27 19:49:31,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:49:31,017 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:49:31,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:31,018 INFO L85 PathProgramCache]: Analyzing trace with hash -827044110, now seen corresponding path program 5 times [2024-11-27 19:49:31,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:31,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761346805] [2024-11-27 19:49:31,018 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 19:49:31,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:31,145 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2024-11-27 19:49:31,145 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:49:31,384 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 264 proven. 57 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-11-27 19:49:31,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:31,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761346805] [2024-11-27 19:49:31,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761346805] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:49:31,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716883096] [2024-11-27 19:49:31,385 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 19:49:31,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:49:31,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:49:31,389 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:49:31,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 19:51:15,633 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2024-11-27 19:51:15,633 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:15,657 INFO L256 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 19:51:15,660 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:15,803 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 305 proven. 16 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-11-27 19:51:15,803 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:51:15,944 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 264 proven. 57 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-11-27 19:51:15,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716883096] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:51:15,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:51:15,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-11-27 19:51:15,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320410171] [2024-11-27 19:51:15,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:51:15,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-27 19:51:15,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:15,946 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-27 19:51:15,946 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2024-11-27 19:51:15,946 INFO L87 Difference]: Start difference. First operand 107 states and 120 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 19:51:16,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:51:16,276 INFO L93 Difference]: Finished difference Result 389 states and 488 transitions. [2024-11-27 19:51:16,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-27 19:51:16,276 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 107 [2024-11-27 19:51:16,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:51:16,279 INFO L225 Difference]: With dead ends: 389 [2024-11-27 19:51:16,279 INFO L226 Difference]: Without dead ends: 302 [2024-11-27 19:51:16,279 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2024-11-27 19:51:16,280 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 296 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 19:51:16,280 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 128 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 19:51:16,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2024-11-27 19:51:16,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 167. [2024-11-27 19:51:16,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 163 states have (on average 1.0797546012269938) internal successors, (176), 163 states have internal predecessors, (176), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 19:51:16,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 180 transitions. [2024-11-27 19:51:16,334 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 180 transitions. Word has length 107 [2024-11-27 19:51:16,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:51:16,335 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 180 transitions. [2024-11-27 19:51:16,335 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 19:51:16,336 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 180 transitions. [2024-11-27 19:51:16,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2024-11-27 19:51:16,340 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:51:16,340 INFO L218 NwaCegarLoop]: trace histogram [50, 50, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:16,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-27 19:51:16,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-27 19:51:16,541 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:51:16,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:16,542 INFO L85 PathProgramCache]: Analyzing trace with hash 183940138, now seen corresponding path program 6 times [2024-11-27 19:51:16,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:16,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998624916] [2024-11-27 19:51:16,542 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 19:51:16,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:16,619 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-27 19:51:16,619 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:16,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2805 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 2782 trivial. 0 not checked. [2024-11-27 19:51:16,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:16,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998624916] [2024-11-27 19:51:16,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998624916] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:16,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448090978] [2024-11-27 19:51:16,699 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 19:51:16,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:16,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:16,701 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:16,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 19:51:16,862 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-27 19:51:16,862 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:16,864 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-27 19:51:16,867 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:17,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2805 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 2782 trivial. 0 not checked. [2024-11-27 19:51:17,134 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:51:17,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2805 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 2782 trivial. 0 not checked. [2024-11-27 19:51:17,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448090978] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:51:17,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:51:17,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-27 19:51:17,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416821253] [2024-11-27 19:51:17,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:51:17,419 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 19:51:17,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:17,420 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 19:51:17,420 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-11-27 19:51:17,420 INFO L87 Difference]: Start difference. First operand 167 states and 180 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 19:51:17,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:51:17,602 INFO L93 Difference]: Finished difference Result 240 states and 273 transitions. [2024-11-27 19:51:17,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 19:51:17,603 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 167 [2024-11-27 19:51:17,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:51:17,607 INFO L225 Difference]: With dead ends: 240 [2024-11-27 19:51:17,607 INFO L226 Difference]: Without dead ends: 209 [2024-11-27 19:51:17,608 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2024-11-27 19:51:17,608 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 57 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 19:51:17,610 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 88 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 19:51:17,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2024-11-27 19:51:17,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 203. [2024-11-27 19:51:17,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 199 states have (on average 1.0804020100502512) internal successors, (215), 199 states have internal predecessors, (215), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 19:51:17,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 219 transitions. [2024-11-27 19:51:17,687 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 219 transitions. Word has length 167 [2024-11-27 19:51:17,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:51:17,688 INFO L471 AbstractCegarLoop]: Abstraction has 203 states and 219 transitions. [2024-11-27 19:51:17,688 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 19:51:17,689 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 219 transitions. [2024-11-27 19:51:17,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2024-11-27 19:51:17,693 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:51:17,693 INFO L218 NwaCegarLoop]: trace histogram [50, 50, 16, 16, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:17,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-27 19:51:17,894 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:17,894 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:51:17,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:17,894 INFO L85 PathProgramCache]: Analyzing trace with hash 374473434, now seen corresponding path program 7 times [2024-11-27 19:51:17,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:17,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8002610] [2024-11-27 19:51:17,895 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 19:51:17,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:18,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:18,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 893 proven. 100 refuted. 0 times theorem prover too weak. 2088 trivial. 0 not checked. [2024-11-27 19:51:18,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:18,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8002610] [2024-11-27 19:51:18,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8002610] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:18,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232834357] [2024-11-27 19:51:18,795 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 19:51:18,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:18,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:18,797 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:18,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 19:51:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:19,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-27 19:51:19,137 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:19,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 893 proven. 100 refuted. 0 times theorem prover too weak. 2088 trivial. 0 not checked. [2024-11-27 19:51:19,440 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:51:19,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 893 proven. 100 refuted. 0 times theorem prover too weak. 2088 trivial. 0 not checked. [2024-11-27 19:51:19,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232834357] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:51:19,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:51:19,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 37 [2024-11-27 19:51:19,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733741818] [2024-11-27 19:51:19,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:51:19,821 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-27 19:51:19,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:19,824 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-27 19:51:19,825 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=753, Unknown=0, NotChecked=0, Total=1332 [2024-11-27 19:51:19,826 INFO L87 Difference]: Start difference. First operand 203 states and 219 transitions. Second operand has 37 states, 37 states have (on average 2.6486486486486487) internal successors, (98), 37 states have internal predecessors, (98), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 19:51:20,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:51:20,862 INFO L93 Difference]: Finished difference Result 761 states and 938 transitions. [2024-11-27 19:51:20,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-27 19:51:20,863 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.6486486486486487) internal successors, (98), 37 states have internal predecessors, (98), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 191 [2024-11-27 19:51:20,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:51:20,867 INFO L225 Difference]: With dead ends: 761 [2024-11-27 19:51:20,867 INFO L226 Difference]: Without dead ends: 590 [2024-11-27 19:51:20,869 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=876, Invalid=1380, Unknown=0, NotChecked=0, Total=2256 [2024-11-27 19:51:20,870 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 503 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-27 19:51:20,870 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 230 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-27 19:51:20,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2024-11-27 19:51:20,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 323. [2024-11-27 19:51:20,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 319 states have (on average 1.0501567398119123) internal successors, (335), 319 states have internal predecessors, (335), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 19:51:20,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 339 transitions. [2024-11-27 19:51:20,961 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 339 transitions. Word has length 191 [2024-11-27 19:51:20,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:51:20,961 INFO L471 AbstractCegarLoop]: Abstraction has 323 states and 339 transitions. [2024-11-27 19:51:20,962 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.6486486486486487) internal successors, (98), 37 states have internal predecessors, (98), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 19:51:20,962 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 339 transitions. [2024-11-27 19:51:20,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2024-11-27 19:51:20,966 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:51:20,967 INFO L218 NwaCegarLoop]: trace histogram [110, 110, 16, 16, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:20,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-27 19:51:21,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:21,171 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:51:21,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:21,172 INFO L85 PathProgramCache]: Analyzing trace with hash -2052632246, now seen corresponding path program 8 times [2024-11-27 19:51:21,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:21,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294425783] [2024-11-27 19:51:21,172 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:51:21,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:21,336 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:51:21,336 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:23,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12921 backedges. 4061 proven. 484 refuted. 0 times theorem prover too weak. 8376 trivial. 0 not checked. [2024-11-27 19:51:23,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:23,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294425783] [2024-11-27 19:51:23,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294425783] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:23,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92866116] [2024-11-27 19:51:23,240 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:51:23,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:23,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:23,242 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:23,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 19:51:23,664 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:51:23,664 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:23,669 INFO L256 TraceCheckSpWp]: Trace formula consists of 1254 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-27 19:51:23,676 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:24,422 INFO L134 CoverageAnalysis]: Checked inductivity of 12921 backedges. 4061 proven. 484 refuted. 0 times theorem prover too weak. 8376 trivial. 0 not checked. [2024-11-27 19:51:24,422 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:51:25,630 INFO L134 CoverageAnalysis]: Checked inductivity of 12921 backedges. 4061 proven. 484 refuted. 0 times theorem prover too weak. 8376 trivial. 0 not checked. [2024-11-27 19:51:25,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92866116] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:51:25,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:51:25,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 73 [2024-11-27 19:51:25,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356647214] [2024-11-27 19:51:25,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:51:25,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-11-27 19:51:25,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:25,634 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-11-27 19:51:25,636 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=2307, Invalid=2949, Unknown=0, NotChecked=0, Total=5256 [2024-11-27 19:51:25,637 INFO L87 Difference]: Start difference. First operand 323 states and 339 transitions. Second operand has 73 states, 73 states have (on average 2.328767123287671) internal successors, (170), 73 states have internal predecessors, (170), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 19:51:28,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:51:28,049 INFO L93 Difference]: Finished difference Result 1433 states and 1790 transitions. [2024-11-27 19:51:28,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-27 19:51:28,050 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.328767123287671) internal successors, (170), 73 states have internal predecessors, (170), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 311 [2024-11-27 19:51:28,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:51:28,055 INFO L225 Difference]: With dead ends: 1433 [2024-11-27 19:51:28,055 INFO L226 Difference]: Without dead ends: 1166 [2024-11-27 19:51:28,057 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 669 GetRequests, 575 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3217 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3480, Invalid=5640, Unknown=0, NotChecked=0, Total=9120 [2024-11-27 19:51:28,058 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 1837 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1837 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-27 19:51:28,058 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1837 Valid, 313 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-27 19:51:28,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2024-11-27 19:51:28,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 563. [2024-11-27 19:51:28,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 559 states have (on average 1.0286225402504472) internal successors, (575), 559 states have internal predecessors, (575), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 19:51:28,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 579 transitions. [2024-11-27 19:51:28,140 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 579 transitions. Word has length 311 [2024-11-27 19:51:28,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:51:28,140 INFO L471 AbstractCegarLoop]: Abstraction has 563 states and 579 transitions. [2024-11-27 19:51:28,140 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.328767123287671) internal successors, (170), 73 states have internal predecessors, (170), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 19:51:28,140 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 579 transitions. [2024-11-27 19:51:28,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2024-11-27 19:51:28,151 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:51:28,151 INFO L218 NwaCegarLoop]: trace histogram [230, 230, 16, 16, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:28,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-27 19:51:28,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-27 19:51:28,352 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:51:28,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:28,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1148371414, now seen corresponding path program 9 times [2024-11-27 19:51:28,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:28,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449928303] [2024-11-27 19:51:28,353 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:51:28,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:28,529 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-27 19:51:28,529 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:28,665 INFO L134 CoverageAnalysis]: Checked inductivity of 54201 backedges. 34 proven. 112 refuted. 0 times theorem prover too weak. 54055 trivial. 0 not checked. [2024-11-27 19:51:28,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:28,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449928303] [2024-11-27 19:51:28,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449928303] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:28,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196355281] [2024-11-27 19:51:28,665 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:51:28,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:28,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:28,670 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:28,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 19:51:29,222 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-27 19:51:29,222 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:29,225 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 19:51:29,234 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:30,157 INFO L134 CoverageAnalysis]: Checked inductivity of 54201 backedges. 130 proven. 16 refuted. 0 times theorem prover too weak. 54055 trivial. 0 not checked. [2024-11-27 19:51:30,157 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:51:31,032 INFO L134 CoverageAnalysis]: Checked inductivity of 54201 backedges. 7 proven. 139 refuted. 0 times theorem prover too weak. 54055 trivial. 0 not checked. [2024-11-27 19:51:31,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196355281] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:51:31,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:51:31,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-11-27 19:51:31,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185555397] [2024-11-27 19:51:31,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:51:31,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-27 19:51:31,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:31,035 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-27 19:51:31,035 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=195, Unknown=0, NotChecked=0, Total=342 [2024-11-27 19:51:31,035 INFO L87 Difference]: Start difference. First operand 563 states and 579 transitions. Second operand has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 19 states have internal predecessors, (75), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 19:51:31,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:51:31,486 INFO L93 Difference]: Finished difference Result 714 states and 765 transitions. [2024-11-27 19:51:31,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-27 19:51:31,486 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 19 states have internal predecessors, (75), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 551 [2024-11-27 19:51:31,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:51:31,492 INFO L225 Difference]: With dead ends: 714 [2024-11-27 19:51:31,492 INFO L226 Difference]: Without dead ends: 653 [2024-11-27 19:51:31,493 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1113 GetRequests, 1091 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=222, Invalid=330, Unknown=0, NotChecked=0, Total=552 [2024-11-27 19:51:31,494 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 208 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 19:51:31,494 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 134 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 19:51:31,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2024-11-27 19:51:31,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 635. [2024-11-27 19:51:31,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 631 states have (on average 1.0348652931854199) internal successors, (653), 631 states have internal predecessors, (653), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 19:51:31,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 657 transitions. [2024-11-27 19:51:31,658 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 657 transitions. Word has length 551 [2024-11-27 19:51:31,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:51:31,660 INFO L471 AbstractCegarLoop]: Abstraction has 635 states and 657 transitions. [2024-11-27 19:51:31,660 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 19 states have internal predecessors, (75), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 19:51:31,660 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 657 transitions. [2024-11-27 19:51:31,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 600 [2024-11-27 19:51:31,674 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:51:31,674 INFO L218 NwaCegarLoop]: trace histogram [230, 230, 40, 40, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:31,686 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-27 19:51:31,879 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-27 19:51:31,879 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:51:31,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:31,880 INFO L85 PathProgramCache]: Analyzing trace with hash 821627786, now seen corresponding path program 10 times [2024-11-27 19:51:31,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:31,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452633808] [2024-11-27 19:51:31,880 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 19:51:31,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:32,210 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 19:51:32,210 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:33,407 INFO L134 CoverageAnalysis]: Checked inductivity of 55617 backedges. 0 proven. 1348 refuted. 0 times theorem prover too weak. 54269 trivial. 0 not checked. [2024-11-27 19:51:33,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:33,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452633808] [2024-11-27 19:51:33,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452633808] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:33,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114101259] [2024-11-27 19:51:33,408 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 19:51:33,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:33,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:33,410 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:33,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-27 19:51:34,057 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 19:51:34,057 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:34,066 INFO L256 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 119 conjuncts are in the unsatisfiable core [2024-11-27 19:51:34,089 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:34,151 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 11 [2024-11-27 19:51:34,219 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-11-27 19:51:34,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2024-11-27 19:51:34,364 INFO L349 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2024-11-27 19:51:34,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 56 [2024-11-27 19:51:34,572 INFO L349 Elim1Store]: treesize reduction 104, result has 22.4 percent of original size [2024-11-27 19:51:34,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 78 [2024-11-27 19:51:34,877 INFO L349 Elim1Store]: treesize reduction 156, result has 20.8 percent of original size [2024-11-27 19:51:34,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 92 treesize of output 100 [2024-11-27 19:51:35,251 INFO L349 Elim1Store]: treesize reduction 216, result has 19.4 percent of original size [2024-11-27 19:51:35,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 111 treesize of output 122 [2024-11-27 19:51:35,687 INFO L349 Elim1Store]: treesize reduction 284, result has 18.2 percent of original size [2024-11-27 19:51:35,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 130 treesize of output 144 [2024-11-27 19:51:36,636 INFO L349 Elim1Store]: treesize reduction 360, result has 17.1 percent of original size [2024-11-27 19:51:36,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 149 treesize of output 166 [2024-11-27 19:51:44,841 INFO L349 Elim1Store]: treesize reduction 444, result has 16.1 percent of original size [2024-11-27 19:51:44,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 168 treesize of output 188 [2024-11-27 19:52:06,513 INFO L349 Elim1Store]: treesize reduction 536, result has 15.2 percent of original size [2024-11-27 19:52:06,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 187 treesize of output 210 [2024-11-27 19:52:23,382 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 101 [2024-11-27 19:52:23,382 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-11-27 19:52:23,383 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2024-11-27 19:52:23,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-27 19:52:23,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-27 19:52:23,584 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:281) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:947) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:786) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:374) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:323) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:555) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:416) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:195) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:291) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:181) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:160) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:106) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:428) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:314) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:275) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:132) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 45 more [2024-11-27 19:52:23,590 INFO L158 Benchmark]: Toolchain (without parser) took 180118.26ms. Allocated memory was 117.4MB in the beginning and 553.6MB in the end (delta: 436.2MB). Free memory was 94.1MB in the beginning and 475.3MB in the end (delta: -381.1MB). Peak memory consumption was 54.2MB. Max. memory is 16.1GB. [2024-11-27 19:52:23,590 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 167.8MB. Free memory is still 103.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 19:52:23,594 INFO L158 Benchmark]: CACSL2BoogieTranslator took 278.93ms. Allocated memory is still 117.4MB. Free memory was 94.1MB in the beginning and 82.6MB in the end (delta: 11.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-27 19:52:23,595 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.29ms. Allocated memory is still 117.4MB. Free memory was 82.6MB in the beginning and 81.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 19:52:23,595 INFO L158 Benchmark]: Boogie Preprocessor took 58.31ms. Allocated memory is still 117.4MB. Free memory was 81.5MB in the beginning and 79.6MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 19:52:23,600 INFO L158 Benchmark]: RCFGBuilder took 338.36ms. Allocated memory is still 117.4MB. Free memory was 79.6MB in the beginning and 67.5MB in the end (delta: 12.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-27 19:52:23,600 INFO L158 Benchmark]: TraceAbstraction took 179394.50ms. Allocated memory was 117.4MB in the beginning and 553.6MB in the end (delta: 436.2MB). Free memory was 66.8MB in the beginning and 475.3MB in the end (delta: -408.5MB). Peak memory consumption was 37.5MB. Max. memory is 16.1GB. [2024-11-27 19:52:23,602 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 167.8MB. Free memory is still 103.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 278.93ms. Allocated memory is still 117.4MB. Free memory was 94.1MB in the beginning and 82.6MB in the end (delta: 11.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.29ms. Allocated memory is still 117.4MB. Free memory was 82.6MB in the beginning and 81.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 58.31ms. Allocated memory is still 117.4MB. Free memory was 81.5MB in the beginning and 79.6MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 338.36ms. Allocated memory is still 117.4MB. Free memory was 79.6MB in the beginning and 67.5MB in the end (delta: 12.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 179394.50ms. Allocated memory was 117.4MB in the beginning and 553.6MB in the end (delta: 436.2MB). Free memory was 66.8MB in the beginning and 475.3MB in the end (delta: -408.5MB). Peak memory consumption was 37.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/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_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2a46b64c20324a7544dfe7936b5f39eaa32bba659068797748195a7f292bdaee --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 19:52:26,384 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 19:52:26,509 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-27 19:52:26,519 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 19:52:26,520 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 19:52:26,568 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 19:52:26,569 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 19:52:26,570 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 19:52:26,570 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 19:52:26,571 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 19:52:26,572 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 19:52:26,572 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 19:52:26,572 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 19:52:26,573 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 19:52:26,573 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 19:52:26,574 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 19:52:26,574 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 19:52:26,574 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 19:52:26,574 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 19:52:26,574 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 19:52:26,575 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 19:52:26,576 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 19:52:26,576 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 19:52:26,576 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-27 19:52:26,576 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-27 19:52:26,576 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-27 19:52:26,577 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 19:52:26,577 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 19:52:26,577 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 19:52:26,577 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 19:52:26,577 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 19:52:26,577 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 19:52:26,577 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 19:52:26,577 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 19:52:26,578 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:52:26,578 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 19:52:26,578 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 19:52:26,578 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 19:52:26,578 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 19:52:26,578 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:52:26,578 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 19:52:26,578 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 19:52:26,578 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 19:52:26,578 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 19:52:26,579 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-27 19:52:26,579 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-27 19:52:26,579 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 19:52:26,579 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 19:52:26,579 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 19:52:26,579 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 19:52:26,579 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_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/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 ! call(reach_error())) ) 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 -> 2a46b64c20324a7544dfe7936b5f39eaa32bba659068797748195a7f292bdaee [2024-11-27 19:52:26,962 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 19:52:26,972 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 19:52:26,975 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 19:52:26,976 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 19:52:26,977 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 19:52:26,979 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c [2024-11-27 19:52:30,161 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/data/577feb2a7/792b4fd1f84f4e5cb8389fc9ba56f5e7/FLAG95ffba108 [2024-11-27 19:52:30,486 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 19:52:30,487 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c [2024-11-27 19:52:30,499 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/data/577feb2a7/792b4fd1f84f4e5cb8389fc9ba56f5e7/FLAG95ffba108 [2024-11-27 19:52:30,528 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/data/577feb2a7/792b4fd1f84f4e5cb8389fc9ba56f5e7 [2024-11-27 19:52:30,531 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 19:52:30,535 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 19:52:30,539 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 19:52:30,539 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 19:52:30,545 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 19:52:30,546 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 07:52:30" (1/1) ... [2024-11-27 19:52:30,550 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1550fdbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:52:30, skipping insertion in model container [2024-11-27 19:52:30,550 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 07:52:30" (1/1) ... [2024-11-27 19:52:30,571 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 19:52:30,784 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c[416,429] [2024-11-27 19:52:30,825 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 19:52:30,844 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 19:52:30,859 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c[416,429] [2024-11-27 19:52:30,878 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 19:52:30,901 INFO L204 MainTranslator]: Completed translation [2024-11-27 19:52:30,902 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:52:30 WrapperNode [2024-11-27 19:52:30,902 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 19:52:30,904 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 19:52:30,905 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 19:52:30,905 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 19:52:30,918 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:52:30" (1/1) ... [2024-11-27 19:52:30,930 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:52:30" (1/1) ... [2024-11-27 19:52:30,959 INFO L138 Inliner]: procedures = 17, calls = 21, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 79 [2024-11-27 19:52:30,959 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 19:52:30,963 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 19:52:30,963 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 19:52:30,963 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 19:52:30,974 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:52:30" (1/1) ... [2024-11-27 19:52:30,974 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:52:30" (1/1) ... [2024-11-27 19:52:30,977 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:52:30" (1/1) ... [2024-11-27 19:52:31,005 INFO L175 MemorySlicer]: Split 7 memory accesses to 3 slices as follows [2, 3, 2]. 43 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-11-27 19:52:31,007 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:52:30" (1/1) ... [2024-11-27 19:52:31,007 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:52:30" (1/1) ... [2024-11-27 19:52:31,022 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:52:30" (1/1) ... [2024-11-27 19:52:31,023 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:52:30" (1/1) ... [2024-11-27 19:52:31,030 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:52:30" (1/1) ... [2024-11-27 19:52:31,033 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:52:30" (1/1) ... [2024-11-27 19:52:31,035 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:52:30" (1/1) ... [2024-11-27 19:52:31,040 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 19:52:31,041 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 19:52:31,045 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 19:52:31,045 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 19:52:31,046 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:52:30" (1/1) ... [2024-11-27 19:52:31,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:52:31,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:52:31,097 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 19:52:31,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 19:52:31,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 19:52:31,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-27 19:52:31,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-27 19:52:31,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2024-11-27 19:52:31,143 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-27 19:52:31,143 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-27 19:52:31,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-27 19:52:31,143 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-11-27 19:52:31,144 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-11-27 19:52:31,144 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2024-11-27 19:52:31,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 19:52:31,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 19:52:31,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-27 19:52:31,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-11-27 19:52:31,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-11-27 19:52:31,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2024-11-27 19:52:31,265 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 19:52:31,268 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 19:52:31,626 INFO L? ?]: Removed 19 outVars from TransFormulas that were not future-live. [2024-11-27 19:52:31,626 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 19:52:31,643 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 19:52:31,645 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-27 19:52:31,646 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 07:52:31 BoogieIcfgContainer [2024-11-27 19:52:31,646 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 19:52:31,649 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 19:52:31,649 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 19:52:31,658 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 19:52:31,658 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 07:52:30" (1/3) ... [2024-11-27 19:52:31,659 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7efbfdde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 07:52:31, skipping insertion in model container [2024-11-27 19:52:31,659 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:52:30" (2/3) ... [2024-11-27 19:52:31,660 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7efbfdde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 07:52:31, skipping insertion in model container [2024-11-27 19:52:31,660 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 07:52:31" (3/3) ... [2024-11-27 19:52:31,661 INFO L128 eAbstractionObserver]: Analyzing ICFG copy-partial-2-n-u.c [2024-11-27 19:52:31,685 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 19:52:31,690 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG copy-partial-2-n-u.c that has 2 procedures, 34 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2024-11-27 19:52:31,778 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 19:52:31,797 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=LoopHeads, 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;@1d499818, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 19:52:31,800 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-27 19:52:31,805 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 30 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 19:52:31,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-27 19:52:31,816 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:52:31,817 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] [2024-11-27 19:52:31,818 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:52:31,825 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:52:31,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1982306888, now seen corresponding path program 1 times [2024-11-27 19:52:31,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:52:31,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [575331369] [2024-11-27 19:52:31,841 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:52:31,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:52:31,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:52:31,849 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:52:31,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 19:52:32,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:52:32,070 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-27 19:52:32,078 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:52:32,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 19:52:32,114 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:52:32,115 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:52:32,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575331369] [2024-11-27 19:52:32,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575331369] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:52:32,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:52:32,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 19:52:32,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110708580] [2024-11-27 19:52:32,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:52:32,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-27 19:52:32,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:52:32,155 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-27 19:52:32,156 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-27 19:52:32,159 INFO L87 Difference]: Start difference. First operand has 34 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 30 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 19:52:32,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:52:32,187 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2024-11-27 19:52:32,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-27 19:52:32,192 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2024-11-27 19:52:32,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:52:32,199 INFO L225 Difference]: With dead ends: 65 [2024-11-27 19:52:32,200 INFO L226 Difference]: Without dead ends: 30 [2024-11-27 19:52:32,203 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-27 19:52:32,210 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 19:52:32,211 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 19:52:32,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-27 19:52:32,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-27 19:52:32,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 19:52:32,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2024-11-27 19:52:32,265 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 23 [2024-11-27 19:52:32,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:52:32,267 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2024-11-27 19:52:32,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 19:52:32,267 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2024-11-27 19:52:32,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-27 19:52:32,270 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:52:32,270 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] [2024-11-27 19:52:32,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-27 19:52:32,474 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:52:32,474 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:52:32,475 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:52:32,475 INFO L85 PathProgramCache]: Analyzing trace with hash -387400584, now seen corresponding path program 1 times [2024-11-27 19:52:32,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:52:32,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1069089735] [2024-11-27 19:52:32,476 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:52:32,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:52:32,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:52:32,479 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:52:32,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 19:52:32,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:52:32,631 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 19:52:32,633 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:52:32,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 19:52:32,735 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:52:32,735 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:52:32,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069089735] [2024-11-27 19:52:32,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069089735] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:52:32,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:52:32,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 19:52:32,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019599746] [2024-11-27 19:52:32,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:52:32,737 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:52:32,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:52:32,739 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:52:32,740 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:52:32,741 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 19:52:32,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:52:32,853 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2024-11-27 19:52:32,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 19:52:32,856 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2024-11-27 19:52:32,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:52:32,857 INFO L225 Difference]: With dead ends: 51 [2024-11-27 19:52:32,857 INFO L226 Difference]: Without dead ends: 35 [2024-11-27 19:52:32,858 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:52:32,859 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 17 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 19:52:32,859 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 60 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 19:52:32,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-27 19:52:32,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2024-11-27 19:52:32,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 19:52:32,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2024-11-27 19:52:32,877 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 23 [2024-11-27 19:52:32,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:52:32,878 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2024-11-27 19:52:32,878 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 19:52:32,879 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2024-11-27 19:52:32,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-27 19:52:32,879 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:52:32,880 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] [2024-11-27 19:52:32,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-27 19:52:33,080 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:52:33,080 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:52:33,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:52:33,081 INFO L85 PathProgramCache]: Analyzing trace with hash 2143597122, now seen corresponding path program 1 times [2024-11-27 19:52:33,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:52:33,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1746123722] [2024-11-27 19:52:33,082 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:52:33,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:52:33,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:52:33,085 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:52:33,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 19:52:33,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:52:33,210 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 19:52:33,213 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:52:33,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 19:52:33,289 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:52:33,289 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:52:33,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746123722] [2024-11-27 19:52:33,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746123722] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:52:33,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:52:33,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 19:52:33,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032695672] [2024-11-27 19:52:33,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:52:33,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:52:33,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:52:33,293 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:52:33,294 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:52:33,294 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 19:52:33,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:52:33,478 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2024-11-27 19:52:33,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 19:52:33,481 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2024-11-27 19:52:33,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:52:33,482 INFO L225 Difference]: With dead ends: 62 [2024-11-27 19:52:33,482 INFO L226 Difference]: Without dead ends: 41 [2024-11-27 19:52:33,482 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:52:33,484 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 43 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 19:52:33,484 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 46 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 19:52:33,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-27 19:52:33,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2024-11-27 19:52:33,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 19:52:33,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2024-11-27 19:52:33,496 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 27 [2024-11-27 19:52:33,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:52:33,497 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2024-11-27 19:52:33,497 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 19:52:33,497 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2024-11-27 19:52:33,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-27 19:52:33,498 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:52:33,498 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] [2024-11-27 19:52:33,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-27 19:52:33,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:52:33,699 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:52:33,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:52:33,700 INFO L85 PathProgramCache]: Analyzing trace with hash 2113219942, now seen corresponding path program 1 times [2024-11-27 19:52:33,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:52:33,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808257130] [2024-11-27 19:52:33,701 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:52:33,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:52:33,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:52:33,703 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:52:33,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 19:52:33,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:52:33,830 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 19:52:33,832 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:52:33,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 19:52:33,919 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:52:33,920 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:52:33,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808257130] [2024-11-27 19:52:33,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808257130] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:52:33,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:52:33,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 19:52:33,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492857042] [2024-11-27 19:52:33,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:52:33,921 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:52:33,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:52:33,922 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:52:33,922 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:52:33,922 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 19:52:34,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:52:34,152 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2024-11-27 19:52:34,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 19:52:34,156 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2024-11-27 19:52:34,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:52:34,160 INFO L225 Difference]: With dead ends: 61 [2024-11-27 19:52:34,160 INFO L226 Difference]: Without dead ends: 51 [2024-11-27 19:52:34,161 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:52:34,162 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 53 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 19:52:34,162 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 45 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 19:52:34,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-27 19:52:34,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 33. [2024-11-27 19:52:34,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 19:52:34,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2024-11-27 19:52:34,185 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 29 [2024-11-27 19:52:34,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:52:34,185 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2024-11-27 19:52:34,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 19:52:34,186 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2024-11-27 19:52:34,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-27 19:52:34,188 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:52:34,189 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] [2024-11-27 19:52:34,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-27 19:52:34,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:52:34,390 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:52:34,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:52:34,390 INFO L85 PathProgramCache]: Analyzing trace with hash 940725168, now seen corresponding path program 1 times [2024-11-27 19:52:34,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:52:34,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [262273011] [2024-11-27 19:52:34,391 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:52:34,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:52:34,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:52:34,395 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:52:34,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 19:52:34,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:52:34,522 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 19:52:34,524 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:52:34,620 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 19:52:34,620 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:52:34,621 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:52:34,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262273011] [2024-11-27 19:52:34,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262273011] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:52:34,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:52:34,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 19:52:34,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250833935] [2024-11-27 19:52:34,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:52:34,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:52:34,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:52:34,623 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:52:34,623 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:52:34,623 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 19:52:34,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:52:34,791 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2024-11-27 19:52:34,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 19:52:34,795 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2024-11-27 19:52:34,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:52:34,796 INFO L225 Difference]: With dead ends: 57 [2024-11-27 19:52:34,796 INFO L226 Difference]: Without dead ends: 42 [2024-11-27 19:52:34,796 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:52:34,797 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 31 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 19:52:34,797 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 47 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 19:52:34,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-27 19:52:34,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2024-11-27 19:52:34,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 19:52:34,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2024-11-27 19:52:34,810 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 33 [2024-11-27 19:52:34,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:52:34,810 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2024-11-27 19:52:34,810 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 19:52:34,811 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2024-11-27 19:52:34,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-27 19:52:34,815 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:52:34,815 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] [2024-11-27 19:52:34,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-27 19:52:35,016 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:52:35,016 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:52:35,017 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:52:35,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1541059884, now seen corresponding path program 1 times [2024-11-27 19:52:35,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:52:35,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [965403480] [2024-11-27 19:52:35,017 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:52:35,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:52:35,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:52:35,019 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:52:35,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 19:52:35,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:52:35,180 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-27 19:52:35,182 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:52:35,283 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 19:52:35,283 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:52:35,394 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 19:52:35,394 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:52:35,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965403480] [2024-11-27 19:52:35,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965403480] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:52:35,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 19:52:35,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-27 19:52:35,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860681123] [2024-11-27 19:52:35,395 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 19:52:35,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 19:52:35,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:52:35,399 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 19:52:35,399 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-27 19:52:35,400 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 19:52:35,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:52:35,838 INFO L93 Difference]: Finished difference Result 96 states and 116 transitions. [2024-11-27 19:52:35,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 19:52:35,843 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2024-11-27 19:52:35,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:52:35,845 INFO L225 Difference]: With dead ends: 96 [2024-11-27 19:52:35,845 INFO L226 Difference]: Without dead ends: 71 [2024-11-27 19:52:35,845 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2024-11-27 19:52:35,846 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 101 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-27 19:52:35,850 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 87 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-27 19:52:35,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-27 19:52:35,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 41. [2024-11-27 19:52:35,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 19:52:35,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2024-11-27 19:52:35,879 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 35 [2024-11-27 19:52:35,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:52:35,879 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2024-11-27 19:52:35,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 19:52:35,880 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2024-11-27 19:52:35,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-27 19:52:35,883 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:52:35,883 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:52:35,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-27 19:52:36,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:52:36,084 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:52:36,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:52:36,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1237113536, now seen corresponding path program 2 times [2024-11-27 19:52:36,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:52:36,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1642447117] [2024-11-27 19:52:36,085 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:52:36,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:52:36,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:52:36,087 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:52:36,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 19:52:36,243 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:52:36,244 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:52:36,251 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-27 19:52:36,254 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:52:36,424 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-27 19:52:36,425 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:52:36,554 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-27 19:52:36,554 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:52:36,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642447117] [2024-11-27 19:52:36,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642447117] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:52:36,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 19:52:36,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-27 19:52:36,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458579041] [2024-11-27 19:52:36,555 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 19:52:36,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 19:52:36,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:52:36,556 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 19:52:36,556 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-27 19:52:36,556 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 19:52:36,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:52:36,946 INFO L93 Difference]: Finished difference Result 148 states and 171 transitions. [2024-11-27 19:52:36,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 19:52:36,947 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2024-11-27 19:52:36,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:52:36,948 INFO L225 Difference]: With dead ends: 148 [2024-11-27 19:52:36,948 INFO L226 Difference]: Without dead ends: 137 [2024-11-27 19:52:36,949 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2024-11-27 19:52:36,950 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 122 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 19:52:36,950 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 116 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 19:52:36,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-11-27 19:52:36,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 59. [2024-11-27 19:52:36,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 55 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 19:52:36,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2024-11-27 19:52:36,993 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 41 [2024-11-27 19:52:36,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:52:36,993 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2024-11-27 19:52:36,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 19:52:36,993 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2024-11-27 19:52:36,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-27 19:52:36,994 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:52:36,995 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:52:37,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-27 19:52:37,195 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:52:37,195 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:52:37,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:52:37,196 INFO L85 PathProgramCache]: Analyzing trace with hash 245889930, now seen corresponding path program 3 times [2024-11-27 19:52:37,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:52:37,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [953072348] [2024-11-27 19:52:37,196 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:52:37,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:52:37,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:52:37,201 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:52:37,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 19:52:37,326 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 19:52:37,326 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:52:37,331 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-27 19:52:37,334 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:52:37,493 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-11-27 19:52:37,493 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:52:37,637 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-11-27 19:52:37,637 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:52:37,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953072348] [2024-11-27 19:52:37,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953072348] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:52:37,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 19:52:37,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-27 19:52:37,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359765809] [2024-11-27 19:52:37,638 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 19:52:37,639 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 19:52:37,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:52:37,640 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 19:52:37,640 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-27 19:52:37,640 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 19:52:37,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:52:37,987 INFO L93 Difference]: Finished difference Result 132 states and 153 transitions. [2024-11-27 19:52:37,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 19:52:37,988 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2024-11-27 19:52:37,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:52:37,989 INFO L225 Difference]: With dead ends: 132 [2024-11-27 19:52:37,990 INFO L226 Difference]: Without dead ends: 95 [2024-11-27 19:52:37,990 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2024-11-27 19:52:37,991 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 43 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 19:52:37,991 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 133 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 19:52:37,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-27 19:52:38,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2024-11-27 19:52:38,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 91 states have (on average 1.1318681318681318) internal successors, (103), 91 states have internal predecessors, (103), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 19:52:38,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2024-11-27 19:52:38,028 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 59 [2024-11-27 19:52:38,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:52:38,028 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2024-11-27 19:52:38,028 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 19:52:38,029 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2024-11-27 19:52:38,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-27 19:52:38,030 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:52:38,030 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:52:38,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-27 19:52:38,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:52:38,231 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:52:38,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:52:38,232 INFO L85 PathProgramCache]: Analyzing trace with hash 329747608, now seen corresponding path program 4 times [2024-11-27 19:52:38,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:52:38,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1963451739] [2024-11-27 19:52:38,233 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 19:52:38,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:52:38,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:52:38,236 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:52:38,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 19:52:38,517 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 19:52:38,517 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:52:38,544 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-27 19:52:38,551 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:52:40,102 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 25 proven. 298 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-11-27 19:52:40,103 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:52:43,263 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 323 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-11-27 19:52:43,264 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:52:43,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963451739] [2024-11-27 19:52:43,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963451739] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:52:43,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 19:52:43,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 35 [2024-11-27 19:52:43,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415852254] [2024-11-27 19:52:43,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 19:52:43,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-27 19:52:43,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:52:43,267 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-27 19:52:43,270 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=985, Unknown=0, NotChecked=0, Total=1190 [2024-11-27 19:52:43,271 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand has 35 states, 35 states have (on average 3.4571428571428573) internal successors, (121), 33 states have internal predecessors, (121), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-27 19:52:46,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:52:46,783 INFO L93 Difference]: Finished difference Result 204 states and 231 transitions. [2024-11-27 19:52:46,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-27 19:52:46,784 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.4571428571428573) internal successors, (121), 33 states have internal predecessors, (121), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 95 [2024-11-27 19:52:46,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:52:46,786 INFO L225 Difference]: With dead ends: 204 [2024-11-27 19:52:46,786 INFO L226 Difference]: Without dead ends: 167 [2024-11-27 19:52:46,788 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=521, Invalid=2449, Unknown=0, NotChecked=0, Total=2970 [2024-11-27 19:52:46,789 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 648 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-27 19:52:46,790 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [648 Valid, 870 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-27 19:52:46,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-11-27 19:52:46,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 113. [2024-11-27 19:52:46,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 109 states have (on average 1.128440366972477) internal successors, (123), 109 states have internal predecessors, (123), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 19:52:46,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 127 transitions. [2024-11-27 19:52:46,836 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 127 transitions. Word has length 95 [2024-11-27 19:52:46,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:52:46,837 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 127 transitions. [2024-11-27 19:52:46,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.4571428571428573) internal successors, (121), 33 states have internal predecessors, (121), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-27 19:52:46,838 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 127 transitions. [2024-11-27 19:52:46,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-27 19:52:46,840 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:52:46,840 INFO L218 NwaCegarLoop]: trace histogram [20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:52:46,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-27 19:52:47,044 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:52:47,044 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:52:47,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:52:47,045 INFO L85 PathProgramCache]: Analyzing trace with hash -986705056, now seen corresponding path program 5 times [2024-11-27 19:52:47,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:52:47,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1683680747] [2024-11-27 19:52:47,046 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 19:52:47,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:52:47,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:52:47,050 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:52:47,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 19:58:21,776 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2024-11-27 19:58:21,776 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:58:21,831 INFO L256 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-27 19:58:21,834 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:58:22,067 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 53 proven. 1 refuted. 0 times theorem prover too weak. 565 trivial. 0 not checked. [2024-11-27 19:58:22,067 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:58:22,299 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 565 trivial. 0 not checked. [2024-11-27 19:58:22,300 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:58:22,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683680747] [2024-11-27 19:58:22,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683680747] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:58:22,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 19:58:22,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-27 19:58:22,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369097103] [2024-11-27 19:58:22,301 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 19:58:22,301 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 19:58:22,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:58:22,302 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 19:58:22,302 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-27 19:58:22,302 INFO L87 Difference]: Start difference. First operand 113 states and 127 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 19:58:22,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:58:22,709 INFO L93 Difference]: Finished difference Result 203 states and 241 transitions. [2024-11-27 19:58:22,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 19:58:22,710 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 113 [2024-11-27 19:58:22,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:58:22,713 INFO L225 Difference]: With dead ends: 203 [2024-11-27 19:58:22,713 INFO L226 Difference]: Without dead ends: 166 [2024-11-27 19:58:22,718 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2024-11-27 19:58:22,719 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 96 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 19:58:22,719 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 79 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 19:58:22,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-11-27 19:58:22,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 155. [2024-11-27 19:58:22,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 151 states have (on average 1.1125827814569536) internal successors, (168), 151 states have internal predecessors, (168), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 19:58:22,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 172 transitions. [2024-11-27 19:58:22,773 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 172 transitions. Word has length 113 [2024-11-27 19:58:22,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:58:22,775 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 172 transitions. [2024-11-27 19:58:22,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 19:58:22,775 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 172 transitions. [2024-11-27 19:58:22,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2024-11-27 19:58:22,779 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:58:22,779 INFO L218 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:58:22,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-27 19:58:22,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:58:22,980 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:58:22,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:58:22,980 INFO L85 PathProgramCache]: Analyzing trace with hash -286656388, now seen corresponding path program 6 times [2024-11-27 19:58:22,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:58:22,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1472842803] [2024-11-27 19:58:22,981 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 19:58:22,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:58:22,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:58:22,984 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:58:22,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-27 19:59:57,206 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-11-27 19:59:57,206 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:59:57,252 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 19:59:57,263 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:59:57,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 305 proven. 16 refuted. 0 times theorem prover too weak. 733 trivial. 0 not checked. [2024-11-27 19:59:57,452 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:59:57,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 264 proven. 57 refuted. 0 times theorem prover too weak. 733 trivial. 0 not checked. [2024-11-27 19:59:57,720 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:59:57,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472842803] [2024-11-27 19:59:57,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472842803] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:59:57,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 19:59:57,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2024-11-27 19:59:57,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247297545] [2024-11-27 19:59:57,720 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 19:59:57,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-27 19:59:57,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:59:57,721 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-27 19:59:57,722 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2024-11-27 19:59:57,722 INFO L87 Difference]: Start difference. First operand 155 states and 172 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 19:59:58,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:59:58,764 INFO L93 Difference]: Finished difference Result 462 states and 557 transitions. [2024-11-27 19:59:58,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-27 19:59:58,767 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 143 [2024-11-27 19:59:58,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:59:58,769 INFO L225 Difference]: With dead ends: 462 [2024-11-27 19:59:58,769 INFO L226 Difference]: Without dead ends: 327 [2024-11-27 19:59:58,770 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=211, Unknown=0, NotChecked=0, Total=342 [2024-11-27 19:59:58,771 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 317 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-27 19:59:58,771 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 221 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-27 19:59:58,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2024-11-27 19:59:58,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 215. [2024-11-27 19:59:58,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 211 states have (on average 1.080568720379147) internal successors, (228), 211 states have internal predecessors, (228), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 19:59:58,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 232 transitions. [2024-11-27 19:59:58,829 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 232 transitions. Word has length 143 [2024-11-27 19:59:58,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:59:58,830 INFO L471 AbstractCegarLoop]: Abstraction has 215 states and 232 transitions. [2024-11-27 19:59:58,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 19:59:58,830 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 232 transitions. [2024-11-27 19:59:58,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2024-11-27 19:59:58,833 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:59:58,833 INFO L218 NwaCegarLoop]: trace histogram [50, 50, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:59:58,893 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-27 19:59:59,034 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:59:59,034 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:59:59,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:59:59,034 INFO L85 PathProgramCache]: Analyzing trace with hash 894706100, now seen corresponding path program 7 times [2024-11-27 19:59:59,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:59:59,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1620837527] [2024-11-27 19:59:59,035 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 19:59:59,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:59:59,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:59:59,038 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:59:59,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-27 19:59:59,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:59:59,527 INFO L256 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 19:59:59,530 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:00:00,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3274 backedges. 0 proven. 2245 refuted. 0 times theorem prover too weak. 1029 trivial. 0 not checked. [2024-11-27 20:00:00,349 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:00:01,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3274 backedges. 0 proven. 2245 refuted. 0 times theorem prover too weak. 1029 trivial. 0 not checked. [2024-11-27 20:00:01,630 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:00:01,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620837527] [2024-11-27 20:00:01,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620837527] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:00:01,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:00:01,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2024-11-27 20:00:01,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475582815] [2024-11-27 20:00:01,631 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:00:01,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-27 20:00:01,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:00:01,633 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-27 20:00:01,633 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2024-11-27 20:00:01,634 INFO L87 Difference]: Start difference. First operand 215 states and 232 transitions. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 20:00:02,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:00:02,598 INFO L93 Difference]: Finished difference Result 468 states and 509 transitions. [2024-11-27 20:00:02,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-27 20:00:02,599 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 203 [2024-11-27 20:00:02,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:00:02,601 INFO L225 Difference]: With dead ends: 468 [2024-11-27 20:00:02,602 INFO L226 Difference]: Without dead ends: 383 [2024-11-27 20:00:02,602 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=188, Invalid=318, Unknown=0, NotChecked=0, Total=506 [2024-11-27 20:00:02,603 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 121 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-27 20:00:02,603 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 289 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-27 20:00:02,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2024-11-27 20:00:02,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2024-11-27 20:00:02,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 379 states have (on average 1.0633245382585752) internal successors, (403), 379 states have internal predecessors, (403), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 20:00:02,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 407 transitions. [2024-11-27 20:00:02,681 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 407 transitions. Word has length 203 [2024-11-27 20:00:02,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:00:02,681 INFO L471 AbstractCegarLoop]: Abstraction has 383 states and 407 transitions. [2024-11-27 20:00:02,682 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 20:00:02,682 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 407 transitions. [2024-11-27 20:00:02,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2024-11-27 20:00:02,689 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:00:02,689 INFO L218 NwaCegarLoop]: trace histogram [120, 120, 20, 20, 12, 12, 12, 12, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:00:02,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-27 20:00:02,890 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:00:02,890 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:00:02,890 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:00:02,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1409745426, now seen corresponding path program 8 times [2024-11-27 20:00:02,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:00:02,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [184207618] [2024-11-27 20:00:02,891 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:00:02,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:00:02,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:00:02,893 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:00:02,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-27 20:00:03,691 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:00:03,692 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:00:03,760 INFO L256 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 20:00:03,767 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:00:04,717 INFO L134 CoverageAnalysis]: Checked inductivity of 16525 backedges. 0 proven. 445 refuted. 0 times theorem prover too weak. 16080 trivial. 0 not checked. [2024-11-27 20:00:04,717 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:00:06,867 INFO L134 CoverageAnalysis]: Checked inductivity of 16525 backedges. 0 proven. 445 refuted. 0 times theorem prover too weak. 16080 trivial. 0 not checked. [2024-11-27 20:00:06,868 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:00:06,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184207618] [2024-11-27 20:00:06,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184207618] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:00:06,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:00:06,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2024-11-27 20:00:06,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092547650] [2024-11-27 20:00:06,868 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:00:06,869 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-27 20:00:06,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:00:06,870 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-27 20:00:06,870 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2024-11-27 20:00:06,870 INFO L87 Difference]: Start difference. First operand 383 states and 407 transitions. Second operand has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 20:00:08,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:00:08,439 INFO L93 Difference]: Finished difference Result 756 states and 843 transitions. [2024-11-27 20:00:08,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-27 20:00:08,440 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 371 [2024-11-27 20:00:08,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:00:08,444 INFO L225 Difference]: With dead ends: 756 [2024-11-27 20:00:08,444 INFO L226 Difference]: Without dead ends: 733 [2024-11-27 20:00:08,445 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 746 GetRequests, 725 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=188, Invalid=318, Unknown=0, NotChecked=0, Total=506 [2024-11-27 20:00:08,446 INFO L435 NwaCegarLoop]: 91 mSDtfsCounter, 1043 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1043 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:00:08,446 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1043 Valid, 591 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-27 20:00:08,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2024-11-27 20:00:08,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 467. [2024-11-27 20:00:08,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 463 states have (on average 1.0669546436285098) internal successors, (494), 463 states have internal predecessors, (494), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 20:00:08,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 498 transitions. [2024-11-27 20:00:08,552 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 498 transitions. Word has length 371 [2024-11-27 20:00:08,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:00:08,554 INFO L471 AbstractCegarLoop]: Abstraction has 467 states and 498 transitions. [2024-11-27 20:00:08,554 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 20:00:08,555 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 498 transitions. [2024-11-27 20:00:08,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2024-11-27 20:00:08,565 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:00:08,565 INFO L218 NwaCegarLoop]: trace histogram [120, 120, 48, 48, 12, 12, 12, 12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:00:08,618 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-27 20:00:08,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:00:08,766 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:00:08,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:00:08,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1032254712, now seen corresponding path program 9 times [2024-11-27 20:00:08,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:00:08,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1614357603] [2024-11-27 20:00:08,768 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:00:08,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:00:08,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:00:08,771 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:00:08,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-27 20:00:09,598 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-27 20:00:09,598 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:00:09,616 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 20:00:09,624 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:00:10,675 INFO L134 CoverageAnalysis]: Checked inductivity of 19108 backedges. 474 proven. 16 refuted. 0 times theorem prover too weak. 18618 trivial. 0 not checked. [2024-11-27 20:00:10,675 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:00:11,757 INFO L134 CoverageAnalysis]: Checked inductivity of 19108 backedges. 23 proven. 467 refuted. 0 times theorem prover too weak. 18618 trivial. 0 not checked. [2024-11-27 20:00:11,757 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:00:11,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614357603] [2024-11-27 20:00:11,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614357603] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:00:11,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:00:11,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2024-11-27 20:00:11,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067586447] [2024-11-27 20:00:11,758 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:00:11,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-27 20:00:11,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:00:11,761 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-27 20:00:11,762 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2024-11-27 20:00:11,762 INFO L87 Difference]: Start difference. First operand 467 states and 498 transitions. Second operand has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 20:00:13,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:00:13,175 INFO L93 Difference]: Finished difference Result 822 states and 944 transitions. [2024-11-27 20:00:13,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-27 20:00:13,175 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 455 [2024-11-27 20:00:13,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:00:13,180 INFO L225 Difference]: With dead ends: 822 [2024-11-27 20:00:13,180 INFO L226 Difference]: Without dead ends: 665 [2024-11-27 20:00:13,181 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 913 GetRequests, 896 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=211, Unknown=0, NotChecked=0, Total=342 [2024-11-27 20:00:13,181 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 302 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-27 20:00:13,182 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 224 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-27 20:00:13,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2024-11-27 20:00:13,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 635. [2024-11-27 20:00:13,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 631 states have (on average 1.058637083993661) internal successors, (668), 631 states have internal predecessors, (668), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 20:00:13,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 672 transitions. [2024-11-27 20:00:13,322 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 672 transitions. Word has length 455 [2024-11-27 20:00:13,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:00:13,323 INFO L471 AbstractCegarLoop]: Abstraction has 635 states and 672 transitions. [2024-11-27 20:00:13,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 20:00:13,324 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 672 transitions. [2024-11-27 20:00:13,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 600 [2024-11-27 20:00:13,329 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:00:13,329 INFO L218 NwaCegarLoop]: trace histogram [120, 120, 120, 120, 12, 12, 12, 12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:00:13,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-27 20:00:13,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:00:13,530 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:00:13,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:00:13,531 INFO L85 PathProgramCache]: Analyzing trace with hash -269752536, now seen corresponding path program 10 times [2024-11-27 20:00:13,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:00:13,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1193205373] [2024-11-27 20:00:13,532 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 20:00:13,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:00:13,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:00:13,535 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:00:13,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-27 20:00:14,798 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 20:00:14,798 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:00:14,911 INFO L256 TraceCheckSpWp]: Trace formula consists of 1329 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-27 20:00:14,921 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:00:17,097 INFO L134 CoverageAnalysis]: Checked inductivity of 31996 backedges. 2245 proven. 2635 refuted. 0 times theorem prover too weak. 27116 trivial. 0 not checked. [2024-11-27 20:00:17,098 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:00:22,419 INFO L134 CoverageAnalysis]: Checked inductivity of 31996 backedges. 4704 proven. 176 refuted. 0 times theorem prover too weak. 27116 trivial. 0 not checked. [2024-11-27 20:00:22,419 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:00:22,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193205373] [2024-11-27 20:00:22,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193205373] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:00:22,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:00:22,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 60 [2024-11-27 20:00:22,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500705125] [2024-11-27 20:00:22,420 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:00:22,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-27 20:00:22,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:00:22,423 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-27 20:00:22,424 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=557, Invalid=2983, Unknown=0, NotChecked=0, Total=3540 [2024-11-27 20:00:22,424 INFO L87 Difference]: Start difference. First operand 635 states and 672 transitions. Second operand has 60 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 60 states have internal predecessors, (121), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:00:38,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:00:38,744 INFO L93 Difference]: Finished difference Result 1517 states and 1693 transitions. [2024-11-27 20:00:38,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-11-27 20:00:38,745 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 60 states have internal predecessors, (121), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 599 [2024-11-27 20:00:38,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:00:38,750 INFO L225 Difference]: With dead ends: 1517 [2024-11-27 20:00:38,750 INFO L226 Difference]: Without dead ends: 738 [2024-11-27 20:00:38,755 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1239 GetRequests, 1137 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2532 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=1924, Invalid=8582, Unknown=0, NotChecked=0, Total=10506 [2024-11-27 20:00:38,756 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 521 mSDsluCounter, 1178 mSDsCounter, 0 mSdLazyCounter, 2816 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 1233 SdHoareTripleChecker+Invalid, 3078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 2816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2024-11-27 20:00:38,756 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 1233 Invalid, 3078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 2816 Invalid, 0 Unknown, 0 Unchecked, 9.5s Time] [2024-11-27 20:00:38,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2024-11-27 20:00:38,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 659. [2024-11-27 20:00:38,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 655 states have (on average 1.0564885496183205) internal successors, (692), 655 states have internal predecessors, (692), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 20:00:38,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 696 transitions. [2024-11-27 20:00:38,894 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 696 transitions. Word has length 599 [2024-11-27 20:00:38,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:00:38,894 INFO L471 AbstractCegarLoop]: Abstraction has 659 states and 696 transitions. [2024-11-27 20:00:38,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 60 states have internal predecessors, (121), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:00:38,895 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 696 transitions. [2024-11-27 20:00:38,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 624 [2024-11-27 20:00:38,900 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:00:38,901 INFO L218 NwaCegarLoop]: trace histogram [132, 132, 120, 120, 12, 12, 12, 12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:00:38,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-27 20:00:39,101 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:00:39,102 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:00:39,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:00:39,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1190920664, now seen corresponding path program 11 times [2024-11-27 20:00:39,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:00:39,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1709749413] [2024-11-27 20:00:39,105 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 20:00:39,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:00:39,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:00:39,107 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:00:39,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a4f36f2-97f7-4727-8c8d-17872e1cdb61/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process