./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.06.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.06.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 52e4ee61a76abd07bd19c87e00a938922ca891ef038e845cba6c6b4d21ef1798 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 05:54:17,335 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 05:54:17,418 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 05:54:17,423 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 05:54:17,424 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 05:54:17,453 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 05:54:17,457 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 05:54:17,458 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 05:54:17,458 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 05:54:17,459 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 05:54:17,459 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 05:54:17,460 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 05:54:17,460 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 05:54:17,460 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 05:54:17,461 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 05:54:17,462 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 05:54:17,464 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 05:54:17,468 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 05:54:17,469 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 05:54:17,469 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 05:54:17,469 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 05:54:17,470 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 05:54:17,471 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 05:54:17,474 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 05:54:17,475 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 05:54:17,475 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 05:54:17,475 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 05:54:17,476 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 05:54:17,476 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 05:54:17,476 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 05:54:17,477 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 05:54:17,477 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 05:54:17,477 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 05:54:17,477 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 05:54:17,478 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 05:54:17,478 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 05:54:17,478 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 05:54:17,479 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 05:54:17,479 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:54:17,479 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 05:54:17,480 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 05:54:17,480 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 05:54:17,481 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 05:54:17,481 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 05:54:17,481 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 05:54:17,482 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 05:54:17,482 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 05:54:17,482 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52e4ee61a76abd07bd19c87e00a938922ca891ef038e845cba6c6b4d21ef1798 [2024-11-09 05:54:17,765 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 05:54:17,799 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 05:54:17,802 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 05:54:17,804 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 05:54:17,806 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 05:54:17,808 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.06.cil-1.c Unable to find full path for "g++" [2024-11-09 05:54:19,847 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 05:54:20,597 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 05:54:20,598 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/sv-benchmarks/c/combinations/Problem05_label42+token_ring.06.cil-1.c [2024-11-09 05:54:20,646 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/data/5f68cd59a/676cfbfb71d44a3dad98a710db0dba49/FLAG49174d696 [2024-11-09 05:54:20,937 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/data/5f68cd59a/676cfbfb71d44a3dad98a710db0dba49 [2024-11-09 05:54:20,939 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 05:54:20,940 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 05:54:20,942 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 05:54:20,942 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 05:54:20,948 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 05:54:20,948 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:54:20" (1/1) ... [2024-11-09 05:54:20,950 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fe3c437 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:54:20, skipping insertion in model container [2024-11-09 05:54:20,950 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:54:20" (1/1) ... [2024-11-09 05:54:21,169 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 05:54:23,400 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_91d7af13-ef8e-4ca8-aa32-fa443c967a65/sv-benchmarks/c/combinations/Problem05_label42+token_ring.06.cil-1.c[378560,378573] [2024-11-09 05:54:23,456 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_91d7af13-ef8e-4ca8-aa32-fa443c967a65/sv-benchmarks/c/combinations/Problem05_label42+token_ring.06.cil-1.c[383339,383352] [2024-11-09 05:54:23,963 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:54:23,978 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 05:54:25,230 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_91d7af13-ef8e-4ca8-aa32-fa443c967a65/sv-benchmarks/c/combinations/Problem05_label42+token_ring.06.cil-1.c[378560,378573] [2024-11-09 05:54:25,238 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_91d7af13-ef8e-4ca8-aa32-fa443c967a65/sv-benchmarks/c/combinations/Problem05_label42+token_ring.06.cil-1.c[383339,383352] [2024-11-09 05:54:25,257 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:54:25,323 INFO L204 MainTranslator]: Completed translation [2024-11-09 05:54:25,324 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:54:25 WrapperNode [2024-11-09 05:54:25,324 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 05:54:25,325 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 05:54:25,326 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 05:54:25,326 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 05:54:25,334 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:54:25" (1/1) ... [2024-11-09 05:54:25,447 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:54:25" (1/1) ... [2024-11-09 05:54:26,066 INFO L138 Inliner]: procedures = 56, calls = 60, calls flagged for inlining = 33, calls inlined = 33, statements flattened = 12869 [2024-11-09 05:54:26,067 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 05:54:26,068 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 05:54:26,068 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 05:54:26,068 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 05:54:26,079 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:54:25" (1/1) ... [2024-11-09 05:54:26,079 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:54:25" (1/1) ... [2024-11-09 05:54:26,155 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:54:25" (1/1) ... [2024-11-09 05:54:26,156 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:54:25" (1/1) ... [2024-11-09 05:54:26,374 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:54:25" (1/1) ... [2024-11-09 05:54:26,542 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:54:25" (1/1) ... [2024-11-09 05:54:26,581 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:54:25" (1/1) ... [2024-11-09 05:54:26,595 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:54:25" (1/1) ... [2024-11-09 05:54:26,694 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 05:54:26,695 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 05:54:26,695 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 05:54:26,696 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 05:54:26,696 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:54:25" (1/1) ... [2024-11-09 05:54:26,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:54:26,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:54:26,728 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 05:54:26,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 05:54:26,766 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 05:54:26,766 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2024-11-09 05:54:26,767 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2024-11-09 05:54:26,767 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-09 05:54:26,767 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-09 05:54:26,767 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2024-11-09 05:54:26,767 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2024-11-09 05:54:26,768 INFO L130 BoogieDeclarations]: Found specification of procedure error [2024-11-09 05:54:26,768 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2024-11-09 05:54:26,768 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2024-11-09 05:54:26,768 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2024-11-09 05:54:26,768 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2024-11-09 05:54:26,768 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2024-11-09 05:54:26,769 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2024-11-09 05:54:26,769 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2024-11-09 05:54:26,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 05:54:26,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 05:54:26,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 05:54:26,913 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 05:54:26,916 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 05:54:37,979 INFO L? ?]: Removed 1723 outVars from TransFormulas that were not future-live. [2024-11-09 05:54:37,980 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 05:54:40,775 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 05:54:40,776 INFO L316 CfgBuilder]: Removed 10 assume(true) statements. [2024-11-09 05:54:40,776 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:54:40 BoogieIcfgContainer [2024-11-09 05:54:40,777 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 05:54:40,780 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 05:54:40,780 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 05:54:40,784 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 05:54:40,784 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 05:54:20" (1/3) ... [2024-11-09 05:54:40,785 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cd4a05b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:54:40, skipping insertion in model container [2024-11-09 05:54:40,786 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:54:25" (2/3) ... [2024-11-09 05:54:40,786 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cd4a05b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:54:40, skipping insertion in model container [2024-11-09 05:54:40,786 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:54:40" (3/3) ... [2024-11-09 05:54:40,788 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label42+token_ring.06.cil-1.c [2024-11-09 05:54:40,809 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 05:54:40,809 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-09 05:54:40,948 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 05:54:40,954 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=FINITE_AUTOMATA, 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;@444bc358, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 05:54:40,955 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-09 05:54:40,965 INFO L276 IsEmpty]: Start isEmpty. Operand has 1778 states, 1746 states have (on average 1.9644902634593355) internal successors, (3430), 1751 states have internal predecessors, (3430), 22 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2024-11-09 05:54:40,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-09 05:54:40,977 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:54:40,978 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:54:40,979 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:54:40,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:54:40,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1170420731, now seen corresponding path program 1 times [2024-11-09 05:54:40,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:54:40,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076641991] [2024-11-09 05:54:40,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:54:40,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:54:41,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:54:41,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:54:41,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:54:41,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076641991] [2024-11-09 05:54:41,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076641991] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:54:41,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:54:41,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 05:54:41,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877134901] [2024-11-09 05:54:41,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:54:41,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 05:54:41,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:54:41,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 05:54:41,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:54:41,700 INFO L87 Difference]: Start difference. First operand has 1778 states, 1746 states have (on average 1.9644902634593355) internal successors, (3430), 1751 states have internal predecessors, (3430), 22 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 05:54:43,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:54:43,022 INFO L93 Difference]: Finished difference Result 3667 states and 7132 transitions. [2024-11-09 05:54:43,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 05:54:43,024 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2024-11-09 05:54:43,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:54:43,050 INFO L225 Difference]: With dead ends: 3667 [2024-11-09 05:54:43,050 INFO L226 Difference]: Without dead ends: 1888 [2024-11-09 05:54:43,062 INFO L431 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 [2024-11-09 05:54:43,066 INFO L432 NwaCegarLoop]: 3352 mSDtfsCounter, 3603 mSDsluCounter, 3276 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3603 SdHoareTripleChecker+Valid, 6628 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:54:43,067 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3603 Valid, 6628 Invalid, 648 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 05:54:43,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2024-11-09 05:54:43,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 1887. [2024-11-09 05:54:43,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1835 states have (on average 1.9335149863760217) internal successors, (3548), 1839 states have internal predecessors, (3548), 38 states have call successors, (38), 13 states have call predecessors, (38), 12 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2024-11-09 05:54:43,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 3622 transitions. [2024-11-09 05:54:43,271 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 3622 transitions. Word has length 50 [2024-11-09 05:54:43,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:54:43,275 INFO L471 AbstractCegarLoop]: Abstraction has 1887 states and 3622 transitions. [2024-11-09 05:54:43,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 05:54:43,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 3622 transitions. [2024-11-09 05:54:43,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-09 05:54:43,285 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:54:43,286 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:54:43,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 05:54:43,287 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:54:43,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:54:43,289 INFO L85 PathProgramCache]: Analyzing trace with hash 881634883, now seen corresponding path program 1 times [2024-11-09 05:54:43,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:54:43,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071522936] [2024-11-09 05:54:43,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:54:43,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:54:43,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:54:43,617 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 05:54:43,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:54:43,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071522936] [2024-11-09 05:54:43,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071522936] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:54:43,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488424173] [2024-11-09 05:54:43,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:54:43,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:54:43,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:54:43,624 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:54:43,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 05:54:43,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:54:43,856 INFO L255 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:54:43,863 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:54:43,932 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-09 05:54:43,932 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:54:43,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488424173] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:54:43,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:54:43,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 05:54:43,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422752329] [2024-11-09 05:54:43,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:54:43,935 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:54:43,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:54:43,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:54:43,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:54:43,936 INFO L87 Difference]: Start difference. First operand 1887 states and 3622 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 05:54:44,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:54:44,539 INFO L93 Difference]: Finished difference Result 2362 states and 4321 transitions. [2024-11-09 05:54:44,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:54:44,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 96 [2024-11-09 05:54:44,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:54:44,560 INFO L225 Difference]: With dead ends: 2362 [2024-11-09 05:54:44,560 INFO L226 Difference]: Without dead ends: 2121 [2024-11-09 05:54:44,562 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:54:44,567 INFO L432 NwaCegarLoop]: 3261 mSDtfsCounter, 3432 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3432 SdHoareTripleChecker+Valid, 3410 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:54:44,568 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3432 Valid, 3410 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 05:54:44,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2121 states. [2024-11-09 05:54:44,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2121 to 2115. [2024-11-09 05:54:44,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2115 states, 2021 states have (on average 1.8866897575457695) internal successors, (3813), 2026 states have internal predecessors, (3813), 68 states have call successors, (68), 25 states have call predecessors, (68), 24 states have return successors, (66), 64 states have call predecessors, (66), 66 states have call successors, (66) [2024-11-09 05:54:44,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2115 states to 2115 states and 3947 transitions. [2024-11-09 05:54:44,655 INFO L78 Accepts]: Start accepts. Automaton has 2115 states and 3947 transitions. Word has length 96 [2024-11-09 05:54:44,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:54:44,656 INFO L471 AbstractCegarLoop]: Abstraction has 2115 states and 3947 transitions. [2024-11-09 05:54:44,656 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 05:54:44,656 INFO L276 IsEmpty]: Start isEmpty. Operand 2115 states and 3947 transitions. [2024-11-09 05:54:44,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-09 05:54:44,664 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:54:44,664 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:54:44,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 05:54:44,867 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2024-11-09 05:54:44,869 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:54:44,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:54:44,871 INFO L85 PathProgramCache]: Analyzing trace with hash 2086012707, now seen corresponding path program 1 times [2024-11-09 05:54:44,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:54:44,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290411251] [2024-11-09 05:54:44,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:54:44,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:54:44,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:54:45,093 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 05:54:45,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:54:45,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290411251] [2024-11-09 05:54:45,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290411251] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:54:45,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025592760] [2024-11-09 05:54:45,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:54:45,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:54:45,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:54:45,096 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:54:45,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 05:54:45,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:54:45,311 INFO L255 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:54:45,316 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:54:45,389 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 05:54:45,389 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:54:45,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025592760] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:54:45,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:54:45,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 05:54:45,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348207295] [2024-11-09 05:54:45,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:54:45,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:54:45,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:54:45,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:54:45,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:54:45,396 INFO L87 Difference]: Start difference. First operand 2115 states and 3947 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 05:54:46,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:54:46,000 INFO L93 Difference]: Finished difference Result 3040 states and 5302 transitions. [2024-11-09 05:54:46,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:54:46,001 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 96 [2024-11-09 05:54:46,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:54:46,016 INFO L225 Difference]: With dead ends: 3040 [2024-11-09 05:54:46,016 INFO L226 Difference]: Without dead ends: 2571 [2024-11-09 05:54:46,019 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:54:46,020 INFO L432 NwaCegarLoop]: 3231 mSDtfsCounter, 3426 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3426 SdHoareTripleChecker+Valid, 3380 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:54:46,021 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3426 Valid, 3380 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 05:54:46,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2024-11-09 05:54:46,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 2563. [2024-11-09 05:54:46,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 2387 states have (on average 1.8144113950565564) internal successors, (4331), 2394 states have internal predecessors, (4331), 126 states have call successors, (126), 49 states have call predecessors, (126), 48 states have return successors, (124), 120 states have call predecessors, (124), 124 states have call successors, (124) [2024-11-09 05:54:46,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 4581 transitions. [2024-11-09 05:54:46,125 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 4581 transitions. Word has length 96 [2024-11-09 05:54:46,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:54:46,126 INFO L471 AbstractCegarLoop]: Abstraction has 2563 states and 4581 transitions. [2024-11-09 05:54:46,126 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 05:54:46,126 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 4581 transitions. [2024-11-09 05:54:46,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-09 05:54:46,130 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:54:46,130 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:54:46,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 05:54:46,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-09 05:54:46,331 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:54:46,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:54:46,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1221298179, now seen corresponding path program 1 times [2024-11-09 05:54:46,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:54:46,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742798792] [2024-11-09 05:54:46,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:54:46,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:54:46,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:54:46,531 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 05:54:46,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:54:46,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742798792] [2024-11-09 05:54:46,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742798792] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:54:46,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653609579] [2024-11-09 05:54:46,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:54:46,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:54:46,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:54:46,537 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:54:46,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 05:54:46,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:54:46,717 INFO L255 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:54:46,721 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:54:46,767 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 05:54:46,768 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:54:46,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653609579] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:54:46,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:54:46,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 05:54:46,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877686249] [2024-11-09 05:54:46,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:54:46,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:54:46,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:54:46,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:54:46,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:54:46,771 INFO L87 Difference]: Start difference. First operand 2563 states and 4581 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 2 states have internal predecessors, (59), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 05:54:47,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:54:47,506 INFO L93 Difference]: Finished difference Result 4372 states and 7214 transitions. [2024-11-09 05:54:47,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:54:47,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 2 states have internal predecessors, (59), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 96 [2024-11-09 05:54:47,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:54:47,526 INFO L225 Difference]: With dead ends: 4372 [2024-11-09 05:54:47,527 INFO L226 Difference]: Without dead ends: 3455 [2024-11-09 05:54:47,532 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:54:47,533 INFO L432 NwaCegarLoop]: 3257 mSDtfsCounter, 3435 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3435 SdHoareTripleChecker+Valid, 3406 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:54:47,533 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3435 Valid, 3406 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 05:54:47,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3455 states. [2024-11-09 05:54:47,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3455 to 3443. [2024-11-09 05:54:47,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3443 states, 3107 states have (on average 1.7196652719665273) internal successors, (5343), 3118 states have internal predecessors, (5343), 238 states have call successors, (238), 97 states have call predecessors, (238), 96 states have return successors, (236), 228 states have call predecessors, (236), 236 states have call successors, (236) [2024-11-09 05:54:47,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3443 states to 3443 states and 5817 transitions. [2024-11-09 05:54:47,676 INFO L78 Accepts]: Start accepts. Automaton has 3443 states and 5817 transitions. Word has length 96 [2024-11-09 05:54:47,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:54:47,677 INFO L471 AbstractCegarLoop]: Abstraction has 3443 states and 5817 transitions. [2024-11-09 05:54:47,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 2 states have internal predecessors, (59), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 05:54:47,677 INFO L276 IsEmpty]: Start isEmpty. Operand 3443 states and 5817 transitions. [2024-11-09 05:54:47,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-09 05:54:47,682 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:54:47,682 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:54:47,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 05:54:47,886 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:54:47,887 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:54:47,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:54:47,887 INFO L85 PathProgramCache]: Analyzing trace with hash 684262179, now seen corresponding path program 1 times [2024-11-09 05:54:47,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:54:47,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159862355] [2024-11-09 05:54:47,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:54:47,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:54:47,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:54:48,012 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 05:54:48,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:54:48,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159862355] [2024-11-09 05:54:48,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159862355] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:54:48,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:54:48,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:54:48,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458044485] [2024-11-09 05:54:48,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:54:48,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:54:48,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:54:48,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:54:48,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:54:48,018 INFO L87 Difference]: Start difference. First operand 3443 states and 5817 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-09 05:54:48,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:54:48,753 INFO L93 Difference]: Finished difference Result 4871 states and 7892 transitions. [2024-11-09 05:54:48,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:54:48,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 96 [2024-11-09 05:54:48,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:54:48,779 INFO L225 Difference]: With dead ends: 4871 [2024-11-09 05:54:48,779 INFO L226 Difference]: Without dead ends: 3939 [2024-11-09 05:54:48,784 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:54:48,785 INFO L432 NwaCegarLoop]: 3297 mSDtfsCounter, 79 mSDsluCounter, 3220 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 6517 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 05:54:48,787 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 6517 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 05:54:48,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3939 states. [2024-11-09 05:54:48,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3939 to 3783. [2024-11-09 05:54:48,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3783 states, 3431 states have (on average 1.7064995628096764) internal successors, (5855), 3442 states have internal predecessors, (5855), 246 states have call successors, (246), 105 states have call predecessors, (246), 104 states have return successors, (244), 236 states have call predecessors, (244), 244 states have call successors, (244) [2024-11-09 05:54:48,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 6345 transitions. [2024-11-09 05:54:48,952 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 6345 transitions. Word has length 96 [2024-11-09 05:54:48,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:54:48,953 INFO L471 AbstractCegarLoop]: Abstraction has 3783 states and 6345 transitions. [2024-11-09 05:54:48,953 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-09 05:54:48,954 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 6345 transitions. [2024-11-09 05:54:48,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-11-09 05:54:48,960 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:54:48,961 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:54:48,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 05:54:48,961 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:54:48,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:54:48,962 INFO L85 PathProgramCache]: Analyzing trace with hash -798617880, now seen corresponding path program 1 times [2024-11-09 05:54:48,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:54:48,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290826203] [2024-11-09 05:54:48,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:54:48,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:54:48,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:54:49,069 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-09 05:54:49,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:54:49,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290826203] [2024-11-09 05:54:49,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290826203] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:54:49,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:54:49,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:54:49,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094878829] [2024-11-09 05:54:49,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:54:49,072 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:54:49,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:54:49,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:54:49,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:54:49,074 INFO L87 Difference]: Start difference. First operand 3783 states and 6345 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 05:54:49,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:54:49,741 INFO L93 Difference]: Finished difference Result 7984 states and 12474 transitions. [2024-11-09 05:54:49,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:54:49,741 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 129 [2024-11-09 05:54:49,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:54:49,772 INFO L225 Difference]: With dead ends: 7984 [2024-11-09 05:54:49,772 INFO L226 Difference]: Without dead ends: 5847 [2024-11-09 05:54:49,780 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:54:49,781 INFO L432 NwaCegarLoop]: 3215 mSDtfsCounter, 3423 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3423 SdHoareTripleChecker+Valid, 3364 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:54:49,781 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3423 Valid, 3364 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 05:54:49,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5847 states. [2024-11-09 05:54:49,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5847 to 5819. [2024-11-09 05:54:50,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5819 states, 5139 states have (on average 1.6110138159174936) internal successors, (8279), 5158 states have internal predecessors, (8279), 470 states have call successors, (470), 209 states have call predecessors, (470), 208 states have return successors, (468), 452 states have call predecessors, (468), 468 states have call successors, (468) [2024-11-09 05:54:50,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5819 states to 5819 states and 9217 transitions. [2024-11-09 05:54:50,029 INFO L78 Accepts]: Start accepts. Automaton has 5819 states and 9217 transitions. Word has length 129 [2024-11-09 05:54:50,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:54:50,030 INFO L471 AbstractCegarLoop]: Abstraction has 5819 states and 9217 transitions. [2024-11-09 05:54:50,030 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 05:54:50,030 INFO L276 IsEmpty]: Start isEmpty. Operand 5819 states and 9217 transitions. [2024-11-09 05:54:50,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-11-09 05:54:50,042 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:54:50,042 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:54:50,042 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 05:54:50,042 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:54:50,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:54:50,043 INFO L85 PathProgramCache]: Analyzing trace with hash -543371448, now seen corresponding path program 1 times [2024-11-09 05:54:50,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:54:50,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683517620] [2024-11-09 05:54:50,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:54:50,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:54:50,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:54:50,141 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-09 05:54:50,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:54:50,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683517620] [2024-11-09 05:54:50,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683517620] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:54:50,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:54:50,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:54:50,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373027711] [2024-11-09 05:54:50,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:54:50,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:54:50,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:54:50,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:54:50,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:54:50,144 INFO L87 Difference]: Start difference. First operand 5819 states and 9217 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 05:54:50,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:54:50,935 INFO L93 Difference]: Finished difference Result 14020 states and 21066 transitions. [2024-11-09 05:54:50,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:54:50,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 129 [2024-11-09 05:54:50,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:54:51,109 INFO L225 Difference]: With dead ends: 14020 [2024-11-09 05:54:51,109 INFO L226 Difference]: Without dead ends: 9847 [2024-11-09 05:54:51,121 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:54:51,122 INFO L432 NwaCegarLoop]: 3215 mSDtfsCounter, 3425 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3425 SdHoareTripleChecker+Valid, 3364 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:54:51,122 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3425 Valid, 3364 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 05:54:51,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9847 states. [2024-11-09 05:54:51,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9847 to 9795. [2024-11-09 05:54:51,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9795 states, 8475 states have (on average 1.5300294985250738) internal successors, (12967), 8510 states have internal predecessors, (12967), 902 states have call successors, (902), 417 states have call predecessors, (902), 416 states have return successors, (900), 868 states have call predecessors, (900), 900 states have call successors, (900) [2024-11-09 05:54:51,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9795 states to 9795 states and 14769 transitions. [2024-11-09 05:54:51,508 INFO L78 Accepts]: Start accepts. Automaton has 9795 states and 14769 transitions. Word has length 129 [2024-11-09 05:54:51,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:54:51,509 INFO L471 AbstractCegarLoop]: Abstraction has 9795 states and 14769 transitions. [2024-11-09 05:54:51,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 05:54:51,510 INFO L276 IsEmpty]: Start isEmpty. Operand 9795 states and 14769 transitions. [2024-11-09 05:54:51,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-11-09 05:54:51,530 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:54:51,530 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:54:51,530 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 05:54:51,530 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:54:51,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:54:51,531 INFO L85 PathProgramCache]: Analyzing trace with hash 678190287, now seen corresponding path program 1 times [2024-11-09 05:54:51,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:54:51,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103601928] [2024-11-09 05:54:51,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:54:51,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:54:51,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:54:51,625 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-09 05:54:51,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:54:51,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103601928] [2024-11-09 05:54:51,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103601928] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:54:51,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:54:51,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:54:51,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063280235] [2024-11-09 05:54:51,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:54:51,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:54:51,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:54:51,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:54:51,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:54:51,628 INFO L87 Difference]: Start difference. First operand 9795 states and 14769 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 05:54:52,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:54:52,611 INFO L93 Difference]: Finished difference Result 25804 states and 37658 transitions. [2024-11-09 05:54:52,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:54:52,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 129 [2024-11-09 05:54:52,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:54:52,693 INFO L225 Difference]: With dead ends: 25804 [2024-11-09 05:54:52,693 INFO L226 Difference]: Without dead ends: 17655 [2024-11-09 05:54:52,731 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:54:52,732 INFO L432 NwaCegarLoop]: 3240 mSDtfsCounter, 3428 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3428 SdHoareTripleChecker+Valid, 3389 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:54:52,733 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3428 Valid, 3389 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 05:54:52,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17655 states. [2024-11-09 05:54:53,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17655 to 17555. [2024-11-09 05:54:53,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17555 states, 14987 states have (on average 1.4694735437379063) internal successors, (22023), 15054 states have internal predecessors, (22023), 1734 states have call successors, (1734), 833 states have call predecessors, (1734), 832 states have return successors, (1732), 1668 states have call predecessors, (1732), 1732 states have call successors, (1732) [2024-11-09 05:54:53,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17555 states to 17555 states and 25489 transitions. [2024-11-09 05:54:53,635 INFO L78 Accepts]: Start accepts. Automaton has 17555 states and 25489 transitions. Word has length 129 [2024-11-09 05:54:53,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:54:53,635 INFO L471 AbstractCegarLoop]: Abstraction has 17555 states and 25489 transitions. [2024-11-09 05:54:53,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 05:54:53,636 INFO L276 IsEmpty]: Start isEmpty. Operand 17555 states and 25489 transitions. [2024-11-09 05:54:53,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2024-11-09 05:54:53,692 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:54:53,692 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:54:53,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 05:54:53,693 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:54:53,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:54:53,693 INFO L85 PathProgramCache]: Analyzing trace with hash -978441257, now seen corresponding path program 1 times [2024-11-09 05:54:53,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:54:53,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818018800] [2024-11-09 05:54:53,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:54:53,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:54:53,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:54:54,027 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-09 05:54:54,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:54:54,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818018800] [2024-11-09 05:54:54,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818018800] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:54:54,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378635950] [2024-11-09 05:54:54,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:54:54,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:54:54,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:54:54,032 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:54:54,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 05:54:54,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:54:54,232 INFO L255 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 05:54:54,238 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:54:54,315 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 05:54:54,317 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:54:54,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378635950] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:54:54,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:54:54,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 05:54:54,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673007640] [2024-11-09 05:54:54,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:54:54,319 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:54:54,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:54:54,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:54:54,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:54:54,321 INFO L87 Difference]: Start difference. First operand 17555 states and 25489 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 05:54:55,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:54:55,680 INFO L93 Difference]: Finished difference Result 25771 states and 37527 transitions. [2024-11-09 05:54:55,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:54:55,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 150 [2024-11-09 05:54:55,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:54:55,771 INFO L225 Difference]: With dead ends: 25771 [2024-11-09 05:54:55,772 INFO L226 Difference]: Without dead ends: 17623 [2024-11-09 05:54:55,803 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:54:55,804 INFO L432 NwaCegarLoop]: 3333 mSDtfsCounter, 152 mSDsluCounter, 3207 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 6540 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 05:54:55,805 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 6540 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 05:54:55,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17623 states. [2024-11-09 05:54:56,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17623 to 17491. [2024-11-09 05:54:56,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17491 states, 14923 states have (on average 1.4543322388259734) internal successors, (21703), 14990 states have internal predecessors, (21703), 1734 states have call successors, (1734), 833 states have call predecessors, (1734), 832 states have return successors, (1732), 1668 states have call predecessors, (1732), 1732 states have call successors, (1732) [2024-11-09 05:54:56,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17491 states to 17491 states and 25169 transitions. [2024-11-09 05:54:56,905 INFO L78 Accepts]: Start accepts. Automaton has 17491 states and 25169 transitions. Word has length 150 [2024-11-09 05:54:56,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:54:56,905 INFO L471 AbstractCegarLoop]: Abstraction has 17491 states and 25169 transitions. [2024-11-09 05:54:56,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 05:54:56,906 INFO L276 IsEmpty]: Start isEmpty. Operand 17491 states and 25169 transitions. [2024-11-09 05:54:56,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2024-11-09 05:54:56,981 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:54:56,982 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:54:57,004 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 05:54:57,182 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-09 05:54:57,183 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:54:57,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:54:57,183 INFO L85 PathProgramCache]: Analyzing trace with hash 2112148215, now seen corresponding path program 1 times [2024-11-09 05:54:57,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:54:57,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026491709] [2024-11-09 05:54:57,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:54:57,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:54:57,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:54:57,596 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 10 proven. 43 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-09 05:54:57,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:54:57,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026491709] [2024-11-09 05:54:57,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026491709] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:54:57,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133110849] [2024-11-09 05:54:57,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:54:57,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:54:57,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:54:57,599 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:54:57,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 05:54:57,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:54:57,816 INFO L255 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:54:57,821 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:54:57,870 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-09 05:54:57,870 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:54:57,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133110849] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:54:57,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:54:57,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 05:54:57,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890413233] [2024-11-09 05:54:57,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:54:57,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:54:57,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:54:57,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:54:57,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:54:57,874 INFO L87 Difference]: Start difference. First operand 17491 states and 25169 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 05:54:58,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:54:58,992 INFO L93 Difference]: Finished difference Result 29313 states and 41134 transitions. [2024-11-09 05:54:58,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:54:58,993 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 150 [2024-11-09 05:54:58,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:54:59,075 INFO L225 Difference]: With dead ends: 29313 [2024-11-09 05:54:59,075 INFO L226 Difference]: Without dead ends: 21261 [2024-11-09 05:54:59,103 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:54:59,104 INFO L432 NwaCegarLoop]: 3235 mSDtfsCounter, 3432 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3432 SdHoareTripleChecker+Valid, 3274 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:54:59,104 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3432 Valid, 3274 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:54:59,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21261 states. [2024-11-09 05:54:59,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21261 to 21261. [2024-11-09 05:54:59,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21261 states, 18313 states have (on average 1.4086714355922023) internal successors, (25797), 18380 states have internal predecessors, (25797), 1860 states have call successors, (1860), 1087 states have call predecessors, (1860), 1086 states have return successors, (1858), 1794 states have call predecessors, (1858), 1858 states have call successors, (1858) [2024-11-09 05:54:59,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21261 states to 21261 states and 29515 transitions. [2024-11-09 05:54:59,957 INFO L78 Accepts]: Start accepts. Automaton has 21261 states and 29515 transitions. Word has length 150 [2024-11-09 05:54:59,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:54:59,958 INFO L471 AbstractCegarLoop]: Abstraction has 21261 states and 29515 transitions. [2024-11-09 05:54:59,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 05:54:59,959 INFO L276 IsEmpty]: Start isEmpty. Operand 21261 states and 29515 transitions. [2024-11-09 05:55:00,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2024-11-09 05:55:00,007 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:55:00,007 INFO L215 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:55:00,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 05:55:00,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:55:00,208 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:55:00,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:55:00,209 INFO L85 PathProgramCache]: Analyzing trace with hash 833654013, now seen corresponding path program 1 times [2024-11-09 05:55:00,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:55:00,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116750786] [2024-11-09 05:55:00,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:55:00,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:55:00,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:55:00,745 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-11-09 05:55:00,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:55:00,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116750786] [2024-11-09 05:55:00,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116750786] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:55:00,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111037241] [2024-11-09 05:55:00,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:55:00,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:55:00,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:55:00,748 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:55:00,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 05:55:00,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:55:00,977 INFO L255 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-09 05:55:00,981 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:55:01,457 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 66 proven. 29 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-09 05:55:01,458 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:55:02,063 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 53 proven. 3 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-11-09 05:55:02,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111037241] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:55:02,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1863417200] [2024-11-09 05:55:02,093 INFO L159 IcfgInterpreter]: Started Sifa with 79 locations of interest [2024-11-09 05:55:02,093 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:55:02,097 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:55:02,102 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:55:02,103 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:55:25,510 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 30 for LOIs [2024-11-09 05:55:25,515 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 169 for LOIs [2024-11-09 05:55:25,709 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 86 for LOIs [2024-11-09 05:55:25,798 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 1 for LOIs [2024-11-09 05:55:25,798 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 1 for LOIs [2024-11-09 05:55:25,822 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 146 for LOIs [2024-11-09 05:55:26,655 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 1 for LOIs [2024-11-09 05:55:26,756 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:55:49,726 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '257863#(and (= ~m_pc~0 1) (exists ((|v_ULTIMATE.start_eval_~tmp_ndt_1~0#1_18| Int)) (and (not (= |v_ULTIMATE.start_eval_~tmp_ndt_1~0#1_18| 0)) (<= 0 (+ |v_ULTIMATE.start_eval_~tmp_ndt_1~0#1_18| 2147483648)) (<= |v_ULTIMATE.start_eval_~tmp_ndt_1~0#1_18| 2147483647))) (= ~m_st~0 1) (exists ((|v_ULTIMATE.start_eval_~tmp~0#1_23| Int)) (and (not (= |v_ULTIMATE.start_eval_~tmp~0#1_23| 0)) (<= |v_ULTIMATE.start_eval_~tmp~0#1_23| 1) (<= 0 |v_ULTIMATE.start_eval_~tmp~0#1_23|))) (not (= ~token~0 (+ 6 ~local~0))))' at error location [2024-11-09 05:55:49,726 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:55:49,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:55:49,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 10] total 21 [2024-11-09 05:55:49,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947220585] [2024-11-09 05:55:49,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:55:49,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 05:55:49,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:55:49,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 05:55:49,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=4723, Unknown=0, NotChecked=0, Total=5112 [2024-11-09 05:55:49,730 INFO L87 Difference]: Start difference. First operand 21261 states and 29515 transitions. Second operand has 21 states, 14 states have (on average 16.571428571428573) internal successors, (232), 16 states have internal predecessors, (232), 10 states have call successors, (39), 9 states have call predecessors, (39), 12 states have return successors, (38), 10 states have call predecessors, (38), 10 states have call successors, (38) [2024-11-09 05:55:57,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:55:57,042 INFO L93 Difference]: Finished difference Result 74201 states and 101073 transitions. [2024-11-09 05:55:57,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-09 05:55:57,043 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 14 states have (on average 16.571428571428573) internal successors, (232), 16 states have internal predecessors, (232), 10 states have call successors, (39), 9 states have call predecessors, (39), 12 states have return successors, (38), 10 states have call predecessors, (38), 10 states have call successors, (38) Word has length 149 [2024-11-09 05:55:57,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:55:57,250 INFO L225 Difference]: With dead ends: 74201 [2024-11-09 05:55:57,251 INFO L226 Difference]: Without dead ends: 54587 [2024-11-09 05:55:57,313 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 398 SyntacticMatches, 6 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3375 ImplicationChecksByTransitivity, 24.9s TimeCoverageRelationStatistics Valid=977, Invalid=9325, Unknown=0, NotChecked=0, Total=10302 [2024-11-09 05:55:57,313 INFO L432 NwaCegarLoop]: 3183 mSDtfsCounter, 12839 mSDsluCounter, 28503 mSDsCounter, 0 mSdLazyCounter, 3620 mSolverCounterSat, 777 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12839 SdHoareTripleChecker+Valid, 31686 SdHoareTripleChecker+Invalid, 4397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 777 IncrementalHoareTripleChecker+Valid, 3620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:55:57,314 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12839 Valid, 31686 Invalid, 4397 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [777 Valid, 3620 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-09 05:55:57,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54587 states. [2024-11-09 05:55:59,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54587 to 49663. [2024-11-09 05:55:59,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49663 states, 42783 states have (on average 1.3527569361662342) internal successors, (57875), 42930 states have internal predecessors, (57875), 4162 states have call successors, (4162), 2717 states have call predecessors, (4162), 2716 states have return successors, (4160), 4016 states have call predecessors, (4160), 4160 states have call successors, (4160) [2024-11-09 05:55:59,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49663 states to 49663 states and 66197 transitions. [2024-11-09 05:55:59,723 INFO L78 Accepts]: Start accepts. Automaton has 49663 states and 66197 transitions. Word has length 149 [2024-11-09 05:55:59,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:55:59,724 INFO L471 AbstractCegarLoop]: Abstraction has 49663 states and 66197 transitions. [2024-11-09 05:55:59,724 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 14 states have (on average 16.571428571428573) internal successors, (232), 16 states have internal predecessors, (232), 10 states have call successors, (39), 9 states have call predecessors, (39), 12 states have return successors, (38), 10 states have call predecessors, (38), 10 states have call successors, (38) [2024-11-09 05:55:59,724 INFO L276 IsEmpty]: Start isEmpty. Operand 49663 states and 66197 transitions. [2024-11-09 05:55:59,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2024-11-09 05:55:59,807 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:55:59,808 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:55:59,829 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 05:56:00,011 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-09 05:56:00,012 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:56:00,013 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:56:00,013 INFO L85 PathProgramCache]: Analyzing trace with hash -564490430, now seen corresponding path program 1 times [2024-11-09 05:56:00,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:56:00,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853238533] [2024-11-09 05:56:00,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:56:00,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:56:00,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:56:00,315 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-09 05:56:00,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:56:00,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853238533] [2024-11-09 05:56:00,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853238533] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:56:00,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6170497] [2024-11-09 05:56:00,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:56:00,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:56:00,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:56:00,317 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:56:00,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 05:56:00,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:56:00,500 INFO L255 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 05:56:00,503 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:56:00,540 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-09 05:56:00,541 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:56:00,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6170497] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:56:00,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:56:00,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 05:56:00,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296805961] [2024-11-09 05:56:00,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:56:00,543 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:56:00,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:56:00,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:56:00,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:56:00,544 INFO L87 Difference]: Start difference. First operand 49663 states and 66197 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 05:56:04,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:56:04,412 INFO L93 Difference]: Finished difference Result 114195 states and 152764 transitions. [2024-11-09 05:56:04,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:56:04,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 148 [2024-11-09 05:56:04,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:56:04,667 INFO L225 Difference]: With dead ends: 114195 [2024-11-09 05:56:04,667 INFO L226 Difference]: Without dead ends: 66179 [2024-11-09 05:56:04,747 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:56:04,748 INFO L432 NwaCegarLoop]: 3229 mSDtfsCounter, 90 mSDsluCounter, 3197 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 6426 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:56:04,748 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 6426 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:56:04,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66179 states. [2024-11-09 05:56:08,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66179 to 55023. [2024-11-09 05:56:08,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55023 states, 47851 states have (on average 1.372071639046206) internal successors, (65655), 47999 states have internal predecessors, (65655), 4308 states have call successors, (4308), 2863 states have call predecessors, (4308), 2862 states have return successors, (4306), 4161 states have call predecessors, (4306), 4306 states have call successors, (4306) [2024-11-09 05:56:08,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55023 states to 55023 states and 74269 transitions. [2024-11-09 05:56:08,544 INFO L78 Accepts]: Start accepts. Automaton has 55023 states and 74269 transitions. Word has length 148 [2024-11-09 05:56:08,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:56:08,544 INFO L471 AbstractCegarLoop]: Abstraction has 55023 states and 74269 transitions. [2024-11-09 05:56:08,545 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 05:56:08,545 INFO L276 IsEmpty]: Start isEmpty. Operand 55023 states and 74269 transitions. [2024-11-09 05:56:08,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2024-11-09 05:56:08,822 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:56:08,823 INFO L215 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:56:08,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 05:56:09,023 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 05:56:09,024 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:56:09,025 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:56:09,025 INFO L85 PathProgramCache]: Analyzing trace with hash 667154637, now seen corresponding path program 1 times [2024-11-09 05:56:09,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:56:09,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47957642] [2024-11-09 05:56:09,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:56:09,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:56:09,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:56:09,797 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-11-09 05:56:09,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:56:09,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47957642] [2024-11-09 05:56:09,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47957642] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:56:09,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960236167] [2024-11-09 05:56:09,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:56:09,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:56:09,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:56:09,802 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:56:09,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 05:56:10,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:56:10,016 INFO L255 TraceCheckSpWp]: Trace formula consists of 820 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 05:56:10,021 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:56:10,150 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-09 05:56:10,151 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:56:10,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960236167] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:56:10,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:56:10,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-09 05:56:10,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564474484] [2024-11-09 05:56:10,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:56:10,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 05:56:10,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:56:10,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 05:56:10,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-09 05:56:10,154 INFO L87 Difference]: Start difference. First operand 55023 states and 74269 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 3 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2024-11-09 05:56:13,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:56:13,846 INFO L93 Difference]: Finished difference Result 88105 states and 118766 transitions. [2024-11-09 05:56:13,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 05:56:13,846 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 3 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 152 [2024-11-09 05:56:13,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:56:14,032 INFO L225 Difference]: With dead ends: 88105 [2024-11-09 05:56:14,032 INFO L226 Difference]: Without dead ends: 60687 [2024-11-09 05:56:14,074 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-09 05:56:14,075 INFO L432 NwaCegarLoop]: 3315 mSDtfsCounter, 135 mSDsluCounter, 9666 mSDsCounter, 0 mSdLazyCounter, 1186 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 12981 SdHoareTripleChecker+Invalid, 1220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 05:56:14,076 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 12981 Invalid, 1220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1186 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 05:56:14,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60687 states. [2024-11-09 05:56:17,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60687 to 59967. [2024-11-09 05:56:17,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59967 states, 51711 states have (on average 1.3745431339560248) internal successors, (71079), 51931 states have internal predecessors, (71079), 5036 states have call successors, (5036), 3219 states have call predecessors, (5036), 3218 states have return successors, (5034), 4817 states have call predecessors, (5034), 5034 states have call successors, (5034) [2024-11-09 05:56:18,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59967 states to 59967 states and 81149 transitions. [2024-11-09 05:56:18,087 INFO L78 Accepts]: Start accepts. Automaton has 59967 states and 81149 transitions. Word has length 152 [2024-11-09 05:56:18,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:56:18,088 INFO L471 AbstractCegarLoop]: Abstraction has 59967 states and 81149 transitions. [2024-11-09 05:56:18,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 3 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2024-11-09 05:56:18,088 INFO L276 IsEmpty]: Start isEmpty. Operand 59967 states and 81149 transitions. [2024-11-09 05:56:18,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2024-11-09 05:56:18,185 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:56:18,185 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:56:18,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 05:56:18,385 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 05:56:18,386 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:56:18,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:56:18,387 INFO L85 PathProgramCache]: Analyzing trace with hash 412580738, now seen corresponding path program 1 times [2024-11-09 05:56:18,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:56:18,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604106733] [2024-11-09 05:56:18,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:56:18,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:56:18,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:56:18,747 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-11-09 05:56:18,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:56:18,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604106733] [2024-11-09 05:56:18,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604106733] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:56:18,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828315535] [2024-11-09 05:56:18,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:56:18,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:56:18,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:56:18,755 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:56:18,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d7af13-ef8e-4ca8-aa32-fa443c967a65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 05:56:18,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:56:18,956 INFO L255 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:56:18,959 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:56:18,991 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-09 05:56:18,991 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:56:18,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828315535] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:56:18,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:56:18,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-09 05:56:18,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802393378] [2024-11-09 05:56:18,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:56:18,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:56:18,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:56:18,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:56:18,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:56:18,993 INFO L87 Difference]: Start difference. First operand 59967 states and 81149 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11)