./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound50.i --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_22f6e25b-2426-4c7d-975a-88d013a9a888/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22f6e25b-2426-4c7d-975a-88d013a9a888/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_22f6e25b-2426-4c7d-975a-88d013a9a888/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22f6e25b-2426-4c7d-975a-88d013a9a888/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound50.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22f6e25b-2426-4c7d-975a-88d013a9a888/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_22f6e25b-2426-4c7d-975a-88d013a9a888/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 462bdab67ac93ddd789186f30bfdfc189629d2959c27ec219da5960b800d2042 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 19:56:37,317 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 19:56:37,409 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22f6e25b-2426-4c7d-975a-88d013a9a888/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-27 19:56:37,417 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 19:56:37,418 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 19:56:37,459 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 19:56:37,461 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 19:56:37,461 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 19:56:37,462 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 19:56:37,462 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 19:56:37,462 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 19:56:37,463 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 19:56:37,464 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 19:56:37,464 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 19:56:37,464 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 19:56:37,464 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 19:56:37,464 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 19:56:37,465 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 19:56:37,465 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 19:56:37,465 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 19:56:37,465 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 19:56:37,465 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 19:56:37,466 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 19:56:37,466 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 19:56:37,466 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 19:56:37,466 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 19:56:37,466 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 19:56:37,466 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 19:56:37,467 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 19:56:37,467 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 19:56:37,467 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 19:56:37,467 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 19:56:37,468 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:56:37,468 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 19:56:37,468 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 19:56:37,468 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 19:56:37,469 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 19:56:37,469 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:56:37,469 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 19:56:37,469 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 19:56:37,469 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 19:56:37,469 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 19:56:37,469 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 19:56:37,470 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 19:56:37,470 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 19:56:37,470 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 19:56:37,470 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 19:56:37,470 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 19:56:37,470 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_22f6e25b-2426-4c7d-975a-88d013a9a888/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 -> 462bdab67ac93ddd789186f30bfdfc189629d2959c27ec219da5960b800d2042 [2024-11-27 19:56:37,832 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 19:56:37,842 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 19:56:37,846 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 19:56:37,847 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 19:56:37,848 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 19:56:37,850 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22f6e25b-2426-4c7d-975a-88d013a9a888/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound50.i [2024-11-27 19:56:41,224 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22f6e25b-2426-4c7d-975a-88d013a9a888/bin/uautomizer-verify-aQ6SnzHsRB/data/0e0401b89/f45144afb5d94c2b993a156c75ff9143/FLAG1443e100e [2024-11-27 19:56:41,607 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 19:56:41,607 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22f6e25b-2426-4c7d-975a-88d013a9a888/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound50.i [2024-11-27 19:56:41,624 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22f6e25b-2426-4c7d-975a-88d013a9a888/bin/uautomizer-verify-aQ6SnzHsRB/data/0e0401b89/f45144afb5d94c2b993a156c75ff9143/FLAG1443e100e [2024-11-27 19:56:41,652 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22f6e25b-2426-4c7d-975a-88d013a9a888/bin/uautomizer-verify-aQ6SnzHsRB/data/0e0401b89/f45144afb5d94c2b993a156c75ff9143 [2024-11-27 19:56:41,657 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 19:56:41,658 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 19:56:41,661 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 19:56:41,661 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 19:56:41,666 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 19:56:41,668 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 07:56:41" (1/1) ... [2024-11-27 19:56:41,671 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76149c24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:56:41, skipping insertion in model container [2024-11-27 19:56:41,672 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 07:56:41" (1/1) ... [2024-11-27 19:56:41,690 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 19:56:41,900 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_22f6e25b-2426-4c7d-975a-88d013a9a888/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound50.i[950,963] [2024-11-27 19:56:41,928 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 19:56:41,941 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 19:56:41,957 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_22f6e25b-2426-4c7d-975a-88d013a9a888/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound50.i[950,963] [2024-11-27 19:56:41,969 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 19:56:41,990 INFO L204 MainTranslator]: Completed translation [2024-11-27 19:56:41,990 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:56:41 WrapperNode [2024-11-27 19:56:41,991 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 19:56:41,992 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 19:56:41,992 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 19:56:41,992 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 19:56:42,000 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:56:41" (1/1) ... [2024-11-27 19:56:42,008 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:56:41" (1/1) ... [2024-11-27 19:56:42,026 INFO L138 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 53 [2024-11-27 19:56:42,026 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 19:56:42,027 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 19:56:42,027 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 19:56:42,027 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 19:56:42,037 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:56:41" (1/1) ... [2024-11-27 19:56:42,037 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:56:41" (1/1) ... [2024-11-27 19:56:42,038 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:56:41" (1/1) ... [2024-11-27 19:56:42,050 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-27 19:56:42,050 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:56:41" (1/1) ... [2024-11-27 19:56:42,050 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:56:41" (1/1) ... [2024-11-27 19:56:42,054 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:56:41" (1/1) ... [2024-11-27 19:56:42,054 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:56:41" (1/1) ... [2024-11-27 19:56:42,058 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:56:41" (1/1) ... [2024-11-27 19:56:42,059 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:56:41" (1/1) ... [2024-11-27 19:56:42,060 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:56:41" (1/1) ... [2024-11-27 19:56:42,062 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 19:56:42,063 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 19:56:42,063 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 19:56:42,063 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 19:56:42,064 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:56:41" (1/1) ... [2024-11-27 19:56:42,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:56:42,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22f6e25b-2426-4c7d-975a-88d013a9a888/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:56:42,102 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22f6e25b-2426-4c7d-975a-88d013a9a888/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 19:56:42,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22f6e25b-2426-4c7d-975a-88d013a9a888/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 19:56:42,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 19:56:42,134 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-27 19:56:42,134 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-27 19:56:42,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 19:56:42,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 19:56:42,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 19:56:42,135 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-27 19:56:42,136 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-27 19:56:42,207 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 19:56:42,210 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 19:56:42,377 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-27 19:56:42,377 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 19:56:42,389 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 19:56:42,391 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-27 19:56:42,391 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 07:56:42 BoogieIcfgContainer [2024-11-27 19:56:42,391 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 19:56:42,396 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 19:56:42,396 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 19:56:42,404 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 19:56:42,404 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 07:56:41" (1/3) ... [2024-11-27 19:56:42,405 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5295530d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 07:56:42, skipping insertion in model container [2024-11-27 19:56:42,406 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:56:41" (2/3) ... [2024-11-27 19:56:42,406 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5295530d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 07:56:42, skipping insertion in model container [2024-11-27 19:56:42,407 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 07:56:42" (3/3) ... [2024-11-27 19:56:42,409 INFO L128 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound50.i [2024-11-27 19:56:42,427 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 19:56:42,429 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG divbin_unwindbound50.i that has 3 procedures, 28 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-27 19:56:42,503 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 19:56:42,521 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;@15cf989c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 19:56:42,522 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-27 19:56:42,528 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-27 19:56:42,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-27 19:56:42,536 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:56:42,537 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:56:42,538 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:56:42,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:56:42,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1267887399, now seen corresponding path program 1 times [2024-11-27 19:56:42,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:56:42,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694711752] [2024-11-27 19:56:42,556 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:56:42,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:56:42,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:56:42,766 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 19:56:42,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:56:42,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694711752] [2024-11-27 19:56:42,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694711752] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:56:42,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800995293] [2024-11-27 19:56:42,772 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:56:42,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:56:42,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22f6e25b-2426-4c7d-975a-88d013a9a888/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:56:42,776 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22f6e25b-2426-4c7d-975a-88d013a9a888/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:56:42,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22f6e25b-2426-4c7d-975a-88d013a9a888/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 19:56:42,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:56:42,890 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-27 19:56:42,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:56:42,910 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 19:56:42,911 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:56:42,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800995293] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:56:42,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 19:56:42,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-11-27 19:56:42,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881207379] [2024-11-27 19:56:42,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:56:42,919 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-27 19:56:42,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:56:42,943 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-27 19:56:42,943 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-27 19:56:42,947 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 19:56:42,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:56:42,976 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2024-11-27 19:56:42,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-27 19:56:42,979 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2024-11-27 19:56:42,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:56:42,988 INFO L225 Difference]: With dead ends: 53 [2024-11-27 19:56:42,988 INFO L226 Difference]: Without dead ends: 24 [2024-11-27 19:56:42,992 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 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 19:56:42,995 INFO L435 NwaCegarLoop]: 34 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, 34 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 19:56:43,000 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 19:56:43,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-27 19:56:43,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-27 19:56:43,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 19:56:43,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2024-11-27 19:56:43,050 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 19 [2024-11-27 19:56:43,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:56:43,050 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2024-11-27 19:56:43,050 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 19:56:43,051 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2024-11-27 19:56:43,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-27 19:56:43,052 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:56:43,052 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:56:43,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22f6e25b-2426-4c7d-975a-88d013a9a888/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-27 19:56:43,258 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22f6e25b-2426-4c7d-975a-88d013a9a888/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:56:43,259 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:56:43,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:56:43,260 INFO L85 PathProgramCache]: Analyzing trace with hash 598904825, now seen corresponding path program 1 times [2024-11-27 19:56:43,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:56:43,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77363866] [2024-11-27 19:56:43,260 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:56:43,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:56:43,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:56:43,465 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 19:56:43,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:56:43,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77363866] [2024-11-27 19:56:43,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77363866] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:56:43,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:56:43,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 19:56:43,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700343741] [2024-11-27 19:56:43,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:56:43,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:56:43,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:56:43,468 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:56:43,468 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:56:43,468 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 19:56:43,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:56:43,507 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2024-11-27 19:56:43,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 19:56:43,511 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2024-11-27 19:56:43,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:56:43,513 INFO L225 Difference]: With dead ends: 38 [2024-11-27 19:56:43,514 INFO L226 Difference]: Without dead ends: 26 [2024-11-27 19:56:43,514 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:56:43,515 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 5 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 19:56:43,516 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 71 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 19:56:43,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-27 19:56:43,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-27 19:56:43,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 19:56:43,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2024-11-27 19:56:43,523 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 21 [2024-11-27 19:56:43,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:56:43,525 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2024-11-27 19:56:43,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 19:56:43,525 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2024-11-27 19:56:43,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-27 19:56:43,526 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:56:43,526 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:56:43,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 19:56:43,526 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:56:43,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:56:43,527 INFO L85 PathProgramCache]: Analyzing trace with hash -738384089, now seen corresponding path program 1 times [2024-11-27 19:56:43,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:56:43,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569252621] [2024-11-27 19:56:43,527 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:56:43,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:56:43,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-27 19:56:43,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1048597177] [2024-11-27 19:56:43,595 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:56:43,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:56:43,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22f6e25b-2426-4c7d-975a-88d013a9a888/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:56:43,597 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22f6e25b-2426-4c7d-975a-88d013a9a888/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:56:43,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22f6e25b-2426-4c7d-975a-88d013a9a888/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 19:56:43,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:56:43,663 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 19:56:43,666 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:56:43,807 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 19:56:43,808 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:56:43,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:56:43,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569252621] [2024-11-27 19:56:43,809 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 19:56:43,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048597177] [2024-11-27 19:56:43,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048597177] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:56:43,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:56:43,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 19:56:43,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720361582] [2024-11-27 19:56:43,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:56:43,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 19:56:43,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:56:43,810 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 19:56:43,811 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 19:56:43,811 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 19:56:43,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:56:43,891 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2024-11-27 19:56:43,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 19:56:43,892 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2024-11-27 19:56:43,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:56:43,893 INFO L225 Difference]: With dead ends: 38 [2024-11-27 19:56:43,893 INFO L226 Difference]: Without dead ends: 35 [2024-11-27 19:56:43,894 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 19:56:43,894 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 19:56:43,895 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 82 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 19:56:43,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-27 19:56:43,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-11-27 19:56:43,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-27 19:56:43,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2024-11-27 19:56:43,903 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 22 [2024-11-27 19:56:43,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:56:43,903 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2024-11-27 19:56:43,904 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 19:56:43,904 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2024-11-27 19:56:43,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-27 19:56:43,905 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:56:43,905 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:56:43,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22f6e25b-2426-4c7d-975a-88d013a9a888/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-27 19:56:44,105 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22f6e25b-2426-4c7d-975a-88d013a9a888/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:56:44,106 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:56:44,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:56:44,106 INFO L85 PathProgramCache]: Analyzing trace with hash 418469087, now seen corresponding path program 1 times [2024-11-27 19:56:44,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:56:44,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160269159] [2024-11-27 19:56:44,107 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:56:44,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:56:44,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:56:44,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 19:56:44,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:56:44,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160269159] [2024-11-27 19:56:44,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160269159] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:56:44,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:56:44,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 19:56:44,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687157630] [2024-11-27 19:56:44,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:56:44,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 19:56:44,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:56:44,718 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 19:56:44,718 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 19:56:44,719 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 19:56:44,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:56:44,768 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2024-11-27 19:56:44,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 19:56:44,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2024-11-27 19:56:44,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:56:44,769 INFO L225 Difference]: With dead ends: 61 [2024-11-27 19:56:44,770 INFO L226 Difference]: Without dead ends: 36 [2024-11-27 19:56:44,770 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 19:56:44,771 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 19:56:44,771 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 19:56:44,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-27 19:56:44,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-11-27 19:56:44,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-27 19:56:44,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2024-11-27 19:56:44,788 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 31 [2024-11-27 19:56:44,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:56:44,789 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2024-11-27 19:56:44,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 19:56:44,789 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2024-11-27 19:56:44,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-27 19:56:44,790 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:56:44,790 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:56:44,790 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-27 19:56:44,790 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:56:44,791 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:56:44,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1165293160, now seen corresponding path program 1 times [2024-11-27 19:56:44,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:56:44,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082655986] [2024-11-27 19:56:44,791 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:56:44,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:56:44,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:56:44,965 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-27 19:56:44,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:56:44,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082655986] [2024-11-27 19:56:44,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082655986] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:56:44,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343492392] [2024-11-27 19:56:44,966 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:56:44,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:56:44,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22f6e25b-2426-4c7d-975a-88d013a9a888/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:56:44,971 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22f6e25b-2426-4c7d-975a-88d013a9a888/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:56:44,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22f6e25b-2426-4c7d-975a-88d013a9a888/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 19:56:45,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:56:45,051 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 19:56:45,082 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:56:45,162 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-27 19:56:45,162 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:56:45,265 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-27 19:56:45,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343492392] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:56:45,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:56:45,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 8 [2024-11-27 19:56:45,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915578938] [2024-11-27 19:56:45,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:56:45,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 19:56:45,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:56:45,267 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 19:56:45,267 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-27 19:56:45,268 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-27 19:56:45,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:56:45,388 INFO L93 Difference]: Finished difference Result 76 states and 93 transitions. [2024-11-27 19:56:45,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 19:56:45,389 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 33 [2024-11-27 19:56:45,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:56:45,391 INFO L225 Difference]: With dead ends: 76 [2024-11-27 19:56:45,392 INFO L226 Difference]: Without dead ends: 55 [2024-11-27 19:56:45,393 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-11-27 19:56:45,395 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 14 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 19:56:45,396 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 119 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 19:56:45,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-27 19:56:45,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2024-11-27 19:56:45,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 36 states have internal predecessors, (44), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-27 19:56:45,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2024-11-27 19:56:45,407 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 33 [2024-11-27 19:56:45,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:56:45,407 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2024-11-27 19:56:45,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-27 19:56:45,408 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2024-11-27 19:56:45,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-27 19:56:45,409 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:56:45,409 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:56:45,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22f6e25b-2426-4c7d-975a-88d013a9a888/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-27 19:56:45,609 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22f6e25b-2426-4c7d-975a-88d013a9a888/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:56:45,610 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:56:45,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:56:45,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1394594572, now seen corresponding path program 1 times [2024-11-27 19:56:45,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:56:45,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961357733] [2024-11-27 19:56:45,611 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:56:45,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:56:45,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-27 19:56:45,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1956233017] [2024-11-27 19:56:45,698 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:56:45,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:56:45,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22f6e25b-2426-4c7d-975a-88d013a9a888/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:56:45,701 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22f6e25b-2426-4c7d-975a-88d013a9a888/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:56:45,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22f6e25b-2426-4c7d-975a-88d013a9a888/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 19:56:45,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:56:45,812 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-27 19:56:45,815 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:56:46,246 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:56:46,246 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:57:01,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:57:01,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961357733] [2024-11-27 19:57:01,864 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 19:57:01,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956233017] [2024-11-27 19:57:01,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956233017] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:57:01,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-27 19:57:01,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2024-11-27 19:57:01,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591585440] [2024-11-27 19:57:01,865 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-27 19:57:01,866 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-27 19:57:01,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:57:01,867 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-27 19:57:01,867 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=197, Unknown=3, NotChecked=0, Total=240 [2024-11-27 19:57:01,867 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 19:57:02,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:57:02,466 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2024-11-27 19:57:02,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-27 19:57:02,467 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2024-11-27 19:57:02,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:57:02,468 INFO L225 Difference]: With dead ends: 61 [2024-11-27 19:57:02,468 INFO L226 Difference]: Without dead ends: 57 [2024-11-27 19:57:02,469 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=78, Invalid=339, Unknown=3, NotChecked=0, Total=420 [2024-11-27 19:57:02,470 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 36 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 19:57:02,473 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 191 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 19:57:02,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-27 19:57:02,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2024-11-27 19:57:02,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 42 states have internal predecessors, (50), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-27 19:57:02,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2024-11-27 19:57:02,491 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 34 [2024-11-27 19:57:02,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:57:02,492 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2024-11-27 19:57:02,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 19:57:02,494 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2024-11-27 19:57:02,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-27 19:57:02,496 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:57:02,496 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:57:02,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22f6e25b-2426-4c7d-975a-88d013a9a888/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-27 19:57:02,696 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22f6e25b-2426-4c7d-975a-88d013a9a888/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:57:02,697 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:57:02,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:57:02,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1653373518, now seen corresponding path program 2 times [2024-11-27 19:57:02,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:57:02,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050659351] [2024-11-27 19:57:02,698 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:57:02,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:57:02,870 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:57:02,870 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:57:04,846 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-27 19:57:04,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:57:04,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050659351] [2024-11-27 19:57:04,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050659351] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:57:04,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163310201] [2024-11-27 19:57:04,848 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:57:04,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:57:04,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22f6e25b-2426-4c7d-975a-88d013a9a888/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:57:04,851 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22f6e25b-2426-4c7d-975a-88d013a9a888/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:57:04,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22f6e25b-2426-4c7d-975a-88d013a9a888/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 19:57:04,979 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:57:04,980 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:57:04,982 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-27 19:57:04,989 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:57:06,661 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-27 19:57:06,662 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:57:09,658 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-27 19:57:09,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163310201] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:57:09,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:57:09,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 12] total 28 [2024-11-27 19:57:09,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652985546] [2024-11-27 19:57:09,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:57:09,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-27 19:57:09,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:57:09,661 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-27 19:57:09,661 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2024-11-27 19:57:09,662 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 23 states have internal predecessors, (66), 9 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-27 19:57:10,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:57:10,750 INFO L93 Difference]: Finished difference Result 104 states and 123 transitions. [2024-11-27 19:57:10,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-27 19:57:10,750 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 23 states have internal predecessors, (66), 9 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) Word has length 43 [2024-11-27 19:57:10,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:57:10,752 INFO L225 Difference]: With dead ends: 104 [2024-11-27 19:57:10,752 INFO L226 Difference]: Without dead ends: 62 [2024-11-27 19:57:10,753 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2024-11-27 19:57:10,754 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 24 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-27 19:57:10,754 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 217 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-27 19:57:10,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-27 19:57:10,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2024-11-27 19:57:10,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 42 states have internal predecessors, (49), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-27 19:57:10,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2024-11-27 19:57:10,765 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 43 [2024-11-27 19:57:10,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:57:10,766 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2024-11-27 19:57:10,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 23 states have internal predecessors, (66), 9 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-27 19:57:10,766 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2024-11-27 19:57:10,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-27 19:57:10,767 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:57:10,768 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:57:10,779 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22f6e25b-2426-4c7d-975a-88d013a9a888/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-27 19:57:10,972 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22f6e25b-2426-4c7d-975a-88d013a9a888/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-27 19:57:10,972 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:57:10,973 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:57:10,974 INFO L85 PathProgramCache]: Analyzing trace with hash -627186105, now seen corresponding path program 3 times [2024-11-27 19:57:10,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:57:10,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027974369] [2024-11-27 19:57:10,974 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:57:10,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:57:11,099 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-27 19:57:11,100 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 19:57:11,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1939118988] [2024-11-27 19:57:11,102 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:57:11,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:57:11,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22f6e25b-2426-4c7d-975a-88d013a9a888/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:57:11,105 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22f6e25b-2426-4c7d-975a-88d013a9a888/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:57:11,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22f6e25b-2426-4c7d-975a-88d013a9a888/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 19:57:11,834 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-27 19:57:11,834 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:57:11,836 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-27 19:57:11,839 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:57:40,672 WARN L286 SmtUtils]: Spent 8.13s on a formula simplification that was a NOOP. DAG size: 34 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 19:58:30,930 WARN L286 SmtUtils]: Spent 5.01s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:00:17,050 WARN L286 SmtUtils]: Spent 7.13s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:00:22,445 WARN L286 SmtUtils]: Spent 5.39s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:00:33,674 WARN L286 SmtUtils]: Spent 9.84s on a formula simplification that was a NOOP. DAG size: 32 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:00:53,184 WARN L286 SmtUtils]: Spent 8.83s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:01:04,980 WARN L286 SmtUtils]: Spent 9.69s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:01:19,399 WARN L286 SmtUtils]: Spent 12.16s on a formula simplification that was a NOOP. DAG size: 32 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:01:32,296 WARN L286 SmtUtils]: Spent 8.23s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:01:50,815 WARN L286 SmtUtils]: Spent 6.76s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:02:28,751 WARN L286 SmtUtils]: Spent 13.17s on a formula simplification that was a NOOP. DAG size: 32 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:02:51,338 WARN L286 SmtUtils]: Spent 9.33s on a formula simplification that was a NOOP. DAG size: 32 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:03:01,719 WARN L286 SmtUtils]: Spent 7.19s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:03:16,031 WARN L286 SmtUtils]: Spent 11.51s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:03:22,238 WARN L286 SmtUtils]: Spent 6.11s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:03:41,671 WARN L286 SmtUtils]: Spent 8.52s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:03:49,254 WARN L286 SmtUtils]: Spent 5.99s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:04:04,876 WARN L286 SmtUtils]: Spent 12.68s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:04:33,435 WARN L286 SmtUtils]: Spent 8.23s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:05:01,131 WARN L286 SmtUtils]: Spent 5.44s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:05:17,888 WARN L286 SmtUtils]: Spent 10.55s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:06:18,794 WARN L286 SmtUtils]: Spent 8.35s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:06:32,909 WARN L286 SmtUtils]: Spent 6.08s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:07:29,151 WARN L286 SmtUtils]: Spent 6.15s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:07:39,163 WARN L286 SmtUtils]: Spent 8.27s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:07:44,701 WARN L286 SmtUtils]: Spent 5.54s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:07:51,039 WARN L286 SmtUtils]: Spent 5.72s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:08:15,587 WARN L286 SmtUtils]: Spent 16.48s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:08:36,171 WARN L286 SmtUtils]: Spent 9.19s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:08:46,264 WARN L286 SmtUtils]: Spent 8.53s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:09:12,099 WARN L286 SmtUtils]: Spent 17.90s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:09:30,560 WARN L286 SmtUtils]: Spent 10.92s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:09:36,828 WARN L286 SmtUtils]: Spent 6.27s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:09:46,995 WARN L286 SmtUtils]: Spent 9.53s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:10:04,284 WARN L286 SmtUtils]: Spent 5.12s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:10:22,757 WARN L286 SmtUtils]: Spent 8.92s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:10:42,251 WARN L286 SmtUtils]: Spent 7.49s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:11:01,432 WARN L286 SmtUtils]: Spent 7.37s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:11:08,841 WARN L286 SmtUtils]: Spent 7.41s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:11:19,702 WARN L286 SmtUtils]: Spent 10.60s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:11:31,318 WARN L286 SmtUtils]: Spent 6.59s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:11:40,310 WARN L286 SmtUtils]: Spent 8.99s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:11:48,572 WARN L286 SmtUtils]: Spent 5.84s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)