./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.06.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.06.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E --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 653a8e34239233d69d9a38d78b85981ab63654836b879da54ad0b88422f00ccf --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 03:26:28,681 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 03:26:28,794 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 03:26:28,805 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 03:26:28,806 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 03:26:28,845 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 03:26:28,846 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 03:26:28,846 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 03:26:28,847 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 03:26:28,847 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 03:26:28,847 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 03:26:28,847 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 03:26:28,847 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 03:26:28,847 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 03:26:28,848 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 03:26:28,848 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 03:26:28,848 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 03:26:28,848 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 03:26:28,848 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 03:26:28,848 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 03:26:28,848 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 03:26:28,851 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 03:26:28,851 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 03:26:28,852 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 03:26:28,852 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 03:26:28,852 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 03:26:28,852 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 03:26:28,853 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 03:26:28,853 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 03:26:28,853 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 03:26:28,853 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 03:26:28,853 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 03:26:28,853 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 03:26:28,854 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 03:26:28,854 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 03:26:28,854 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 03:26:28,854 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 03:26:28,855 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 03:26:28,855 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:26:28,856 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 03:26:28,856 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 03:26:28,856 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 03:26:28,856 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 03:26:28,856 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 03:26:28,856 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 03:26:28,856 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 03:26:28,856 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 03:26:28,857 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E 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 -> 653a8e34239233d69d9a38d78b85981ab63654836b879da54ad0b88422f00ccf [2024-11-14 03:26:29,237 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 03:26:29,254 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 03:26:29,259 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 03:26:29,262 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 03:26:29,262 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 03:26:29,265 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.06.cil-1.c Unable to find full path for "g++" [2024-11-14 03:26:31,818 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 03:26:32,697 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 03:26:32,700 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/sv-benchmarks/c/combinations/Problem05_label43+token_ring.06.cil-1.c [2024-11-14 03:26:32,768 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/data/7880fd843/fdb56bc1c9534f04adf5028e13a59b5d/FLAGaddadc1e2 [2024-11-14 03:26:32,797 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/data/7880fd843/fdb56bc1c9534f04adf5028e13a59b5d [2024-11-14 03:26:32,802 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 03:26:32,804 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 03:26:32,807 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 03:26:32,808 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 03:26:32,814 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 03:26:32,816 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:26:32" (1/1) ... [2024-11-14 03:26:32,817 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24077d71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:26:32, skipping insertion in model container [2024-11-14 03:26:32,819 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:26:32" (1/1) ... [2024-11-14 03:26:33,128 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 03:26:35,677 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_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/sv-benchmarks/c/combinations/Problem05_label43+token_ring.06.cil-1.c[381679,381692] [2024-11-14 03:26:35,734 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_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/sv-benchmarks/c/combinations/Problem05_label43+token_ring.06.cil-1.c[383339,383352] [2024-11-14 03:26:36,054 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:26:36,069 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 03:26:37,727 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_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/sv-benchmarks/c/combinations/Problem05_label43+token_ring.06.cil-1.c[381679,381692] [2024-11-14 03:26:37,734 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_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/sv-benchmarks/c/combinations/Problem05_label43+token_ring.06.cil-1.c[383339,383352] [2024-11-14 03:26:37,775 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:26:37,915 INFO L204 MainTranslator]: Completed translation [2024-11-14 03:26:37,916 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:26:37 WrapperNode [2024-11-14 03:26:37,916 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 03:26:37,918 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 03:26:37,920 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 03:26:37,920 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 03:26:37,929 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:26:37" (1/1) ... [2024-11-14 03:26:38,078 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:26:37" (1/1) ... [2024-11-14 03:26:38,834 INFO L138 Inliner]: procedures = 56, calls = 60, calls flagged for inlining = 33, calls inlined = 33, statements flattened = 12869 [2024-11-14 03:26:38,835 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 03:26:38,836 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 03:26:38,836 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 03:26:38,836 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 03:26:38,846 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:26:37" (1/1) ... [2024-11-14 03:26:38,847 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:26:37" (1/1) ... [2024-11-14 03:26:38,920 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:26:37" (1/1) ... [2024-11-14 03:26:38,920 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:26:37" (1/1) ... [2024-11-14 03:26:39,242 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:26:37" (1/1) ... [2024-11-14 03:26:39,360 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:26:37" (1/1) ... [2024-11-14 03:26:39,402 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:26:37" (1/1) ... [2024-11-14 03:26:39,437 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:26:37" (1/1) ... [2024-11-14 03:26:39,506 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 03:26:39,508 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 03:26:39,509 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 03:26:39,509 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 03:26:39,510 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:26:37" (1/1) ... [2024-11-14 03:26:39,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:26:39,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:26:39,561 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 03:26:39,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 03:26:39,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 03:26:39,697 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2024-11-14 03:26:39,697 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2024-11-14 03:26:39,698 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-14 03:26:39,698 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-14 03:26:39,698 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2024-11-14 03:26:39,698 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2024-11-14 03:26:39,698 INFO L130 BoogieDeclarations]: Found specification of procedure error [2024-11-14 03:26:39,698 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2024-11-14 03:26:39,698 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2024-11-14 03:26:39,698 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2024-11-14 03:26:39,699 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2024-11-14 03:26:39,699 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2024-11-14 03:26:39,699 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2024-11-14 03:26:39,699 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2024-11-14 03:26:39,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 03:26:39,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 03:26:39,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 03:26:39,916 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 03:26:39,919 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 03:26:54,876 INFO L? ?]: Removed 1723 outVars from TransFormulas that were not future-live. [2024-11-14 03:26:54,877 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 03:26:58,780 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 03:26:58,780 INFO L316 CfgBuilder]: Removed 10 assume(true) statements. [2024-11-14 03:26:58,781 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:26:58 BoogieIcfgContainer [2024-11-14 03:26:58,781 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 03:26:58,785 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 03:26:58,785 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 03:26:58,791 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 03:26:58,791 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 03:26:32" (1/3) ... [2024-11-14 03:26:58,792 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22c38d27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:26:58, skipping insertion in model container [2024-11-14 03:26:58,793 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:26:37" (2/3) ... [2024-11-14 03:26:58,793 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22c38d27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:26:58, skipping insertion in model container [2024-11-14 03:26:58,793 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:26:58" (3/3) ... [2024-11-14 03:26:58,795 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label43+token_ring.06.cil-1.c [2024-11-14 03:26:58,833 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 03:26:58,838 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG Problem05_label43+token_ring.06.cil-1.c that has 8 procedures, 1778 locations, 1 initial locations, 10 loop locations, and 2 error locations. [2024-11-14 03:26:59,057 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 03:26:59,078 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;@5a0b439b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 03:26:59,078 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-14 03:26:59,093 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) [2024-11-14 03:26:59,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-14 03:26:59,106 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:26:59,107 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] [2024-11-14 03:26:59,109 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:26:59,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:26:59,117 INFO L85 PathProgramCache]: Analyzing trace with hash -657102747, now seen corresponding path program 1 times [2024-11-14 03:26:59,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:26:59,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873305906] [2024-11-14 03:26:59,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:26:59,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:26:59,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:26:59,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:26:59,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:26:59,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873305906] [2024-11-14 03:26:59,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873305906] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:26:59,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:26:59,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 03:26:59,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587309603] [2024-11-14 03:26:59,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:26:59,821 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:26:59,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:26:59,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:26:59,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:26:59,863 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) [2024-11-14 03:27:01,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:27:01,385 INFO L93 Difference]: Finished difference Result 3667 states and 7132 transitions. [2024-11-14 03:27:01,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:27:01,388 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 [2024-11-14 03:27:01,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:27:01,414 INFO L225 Difference]: With dead ends: 3667 [2024-11-14 03:27:01,414 INFO L226 Difference]: Without dead ends: 1888 [2024-11-14 03:27:01,424 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 [2024-11-14 03:27:01,428 INFO L432 NwaCegarLoop]: 3352 mSDtfsCounter, 3603 mSDsluCounter, 3276 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:27:01,429 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3603 Valid, 6628 Invalid, 648 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-14 03:27:01,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2024-11-14 03:27:01,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 1887. [2024-11-14 03:27:01,700 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) [2024-11-14 03:27:01,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 3622 transitions. [2024-11-14 03:27:01,727 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 3622 transitions. Word has length 50 [2024-11-14 03:27:01,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:27:01,729 INFO L471 AbstractCegarLoop]: Abstraction has 1887 states and 3622 transitions. [2024-11-14 03:27:01,729 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) [2024-11-14 03:27:01,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 3622 transitions. [2024-11-14 03:27:01,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-14 03:27:01,739 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:27:01,739 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] [2024-11-14 03:27:01,739 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 03:27:01,740 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:27:01,740 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:27:01,741 INFO L85 PathProgramCache]: Analyzing trace with hash 345570436, now seen corresponding path program 1 times [2024-11-14 03:27:01,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:27:01,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716738109] [2024-11-14 03:27:01,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:27:01,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:27:01,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:27:02,113 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:27:02,113 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:27:02,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716738109] [2024-11-14 03:27:02,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716738109] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:27:02,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908992181] [2024-11-14 03:27:02,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:27:02,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:27:02,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:27:02,118 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:27:02,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 03:27:02,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:27:02,405 INFO L255 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:27:02,413 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:27:02,510 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 03:27:02,510 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:27:02,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908992181] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:27:02,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:27:02,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:27:02,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472010784] [2024-11-14 03:27:02,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:27:02,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:27:02,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:27:02,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:27:02,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:27:02,517 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) [2024-11-14 03:27:03,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:27:03,299 INFO L93 Difference]: Finished difference Result 2362 states and 4321 transitions. [2024-11-14 03:27:03,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:27:03,300 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 [2024-11-14 03:27:03,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:27:03,317 INFO L225 Difference]: With dead ends: 2362 [2024-11-14 03:27:03,318 INFO L226 Difference]: Without dead ends: 2121 [2024-11-14 03:27:03,320 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 [2024-11-14 03:27:03,321 INFO L432 NwaCegarLoop]: 3261 mSDtfsCounter, 3432 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:27:03,322 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3432 Valid, 3410 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:27:03,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2121 states. [2024-11-14 03:27:03,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2121 to 2115. [2024-11-14 03:27:03,427 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) [2024-11-14 03:27:03,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2115 states to 2115 states and 3947 transitions. [2024-11-14 03:27:03,451 INFO L78 Accepts]: Start accepts. Automaton has 2115 states and 3947 transitions. Word has length 96 [2024-11-14 03:27:03,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:27:03,451 INFO L471 AbstractCegarLoop]: Abstraction has 2115 states and 3947 transitions. [2024-11-14 03:27:03,451 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) [2024-11-14 03:27:03,452 INFO L276 IsEmpty]: Start isEmpty. Operand 2115 states and 3947 transitions. [2024-11-14 03:27:03,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-14 03:27:03,459 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:27:03,459 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] [2024-11-14 03:27:03,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-14 03:27:03,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:27:03,661 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:27:03,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:27:03,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1549948260, now seen corresponding path program 1 times [2024-11-14 03:27:03,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:27:03,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135725842] [2024-11-14 03:27:03,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:27:03,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:27:03,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:27:03,951 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:27:03,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:27:03,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135725842] [2024-11-14 03:27:03,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135725842] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:27:03,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368578561] [2024-11-14 03:27:03,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:27:03,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:27:03,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:27:03,957 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:27:03,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 03:27:04,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:27:04,209 INFO L255 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:27:04,215 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:27:04,310 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 03:27:04,311 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:27:04,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368578561] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:27:04,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:27:04,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:27:04,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438663192] [2024-11-14 03:27:04,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:27:04,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:27:04,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:27:04,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:27:04,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:27:04,313 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) [2024-11-14 03:27:05,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:27:05,096 INFO L93 Difference]: Finished difference Result 3040 states and 5302 transitions. [2024-11-14 03:27:05,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:27:05,097 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 [2024-11-14 03:27:05,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:27:05,118 INFO L225 Difference]: With dead ends: 3040 [2024-11-14 03:27:05,118 INFO L226 Difference]: Without dead ends: 2571 [2024-11-14 03:27:05,121 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 [2024-11-14 03:27:05,122 INFO L432 NwaCegarLoop]: 3231 mSDtfsCounter, 3426 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:27:05,125 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3426 Valid, 3380 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:27:05,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2024-11-14 03:27:05,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 2563. [2024-11-14 03:27:05,251 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) [2024-11-14 03:27:05,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 4581 transitions. [2024-11-14 03:27:05,278 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 4581 transitions. Word has length 96 [2024-11-14 03:27:05,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:27:05,280 INFO L471 AbstractCegarLoop]: Abstraction has 2563 states and 4581 transitions. [2024-11-14 03:27:05,281 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) [2024-11-14 03:27:05,281 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 4581 transitions. [2024-11-14 03:27:05,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-14 03:27:05,287 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:27:05,287 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] [2024-11-14 03:27:05,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 03:27:05,487 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:27:05,488 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:27:05,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:27:05,489 INFO L85 PathProgramCache]: Analyzing trace with hash 685233732, now seen corresponding path program 1 times [2024-11-14 03:27:05,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:27:05,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136307331] [2024-11-14 03:27:05,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:27:05,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:27:05,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:27:05,793 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:27:05,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:27:05,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136307331] [2024-11-14 03:27:05,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136307331] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:27:05,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688454346] [2024-11-14 03:27:05,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:27:05,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:27:05,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:27:05,798 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:27:05,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 03:27:06,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:27:06,043 INFO L255 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:27:06,047 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:27:06,107 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 03:27:06,108 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:27:06,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688454346] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:27:06,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:27:06,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:27:06,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45989077] [2024-11-14 03:27:06,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:27:06,111 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:27:06,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:27:06,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:27:06,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:27:06,113 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) [2024-11-14 03:27:06,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:27:06,913 INFO L93 Difference]: Finished difference Result 4372 states and 7214 transitions. [2024-11-14 03:27:06,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:27:06,914 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 [2024-11-14 03:27:06,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:27:06,938 INFO L225 Difference]: With dead ends: 4372 [2024-11-14 03:27:06,939 INFO L226 Difference]: Without dead ends: 3455 [2024-11-14 03:27:06,944 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 [2024-11-14 03:27:06,945 INFO L432 NwaCegarLoop]: 3257 mSDtfsCounter, 3435 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:27:06,946 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3435 Valid, 3406 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:27:06,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3455 states. [2024-11-14 03:27:07,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3455 to 3443. [2024-11-14 03:27:07,111 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) [2024-11-14 03:27:07,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3443 states to 3443 states and 5817 transitions. [2024-11-14 03:27:07,136 INFO L78 Accepts]: Start accepts. Automaton has 3443 states and 5817 transitions. Word has length 96 [2024-11-14 03:27:07,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:27:07,137 INFO L471 AbstractCegarLoop]: Abstraction has 3443 states and 5817 transitions. [2024-11-14 03:27:07,137 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) [2024-11-14 03:27:07,137 INFO L276 IsEmpty]: Start isEmpty. Operand 3443 states and 5817 transitions. [2024-11-14 03:27:07,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-14 03:27:07,149 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:27:07,149 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] [2024-11-14 03:27:07,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-14 03:27:07,350 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:27:07,350 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:27:07,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:27:07,351 INFO L85 PathProgramCache]: Analyzing trace with hash 148197732, now seen corresponding path program 1 times [2024-11-14 03:27:07,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:27:07,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848213648] [2024-11-14 03:27:07,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:27:07,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:27:07,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:27:07,575 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-14 03:27:07,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:27:07,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848213648] [2024-11-14 03:27:07,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848213648] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:27:07,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:27:07,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:27:07,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318915154] [2024-11-14 03:27:07,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:27:07,577 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:27:07,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:27:07,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:27:07,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:27:07,577 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) [2024-11-14 03:27:08,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:27:08,506 INFO L93 Difference]: Finished difference Result 4871 states and 7892 transitions. [2024-11-14 03:27:08,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:27:08,507 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 [2024-11-14 03:27:08,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:27:08,541 INFO L225 Difference]: With dead ends: 4871 [2024-11-14 03:27:08,541 INFO L226 Difference]: Without dead ends: 3939 [2024-11-14 03:27:08,547 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 [2024-11-14 03:27:08,549 INFO L432 NwaCegarLoop]: 3297 mSDtfsCounter, 79 mSDsluCounter, 3220 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 03:27:08,550 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 6517 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 03:27:08,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3939 states. [2024-11-14 03:27:08,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3939 to 3783. [2024-11-14 03:27:08,736 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) [2024-11-14 03:27:08,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 6345 transitions. [2024-11-14 03:27:08,754 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 6345 transitions. Word has length 96 [2024-11-14 03:27:08,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:27:08,757 INFO L471 AbstractCegarLoop]: Abstraction has 3783 states and 6345 transitions. [2024-11-14 03:27:08,758 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) [2024-11-14 03:27:08,758 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 6345 transitions. [2024-11-14 03:27:08,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-11-14 03:27:08,773 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:27:08,773 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] [2024-11-14 03:27:08,774 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 03:27:08,774 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:27:08,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:27:08,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1849695384, now seen corresponding path program 1 times [2024-11-14 03:27:08,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:27:08,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797460391] [2024-11-14 03:27:08,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:27:08,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:27:08,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:27:09,084 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-14 03:27:09,085 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:27:09,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797460391] [2024-11-14 03:27:09,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797460391] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:27:09,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:27:09,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:27:09,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937522385] [2024-11-14 03:27:09,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:27:09,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:27:09,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:27:09,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:27:09,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:27:09,088 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) [2024-11-14 03:27:10,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:27:10,207 INFO L93 Difference]: Finished difference Result 7984 states and 12474 transitions. [2024-11-14 03:27:10,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:27:10,209 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 [2024-11-14 03:27:10,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:27:10,246 INFO L225 Difference]: With dead ends: 7984 [2024-11-14 03:27:10,247 INFO L226 Difference]: Without dead ends: 5847 [2024-11-14 03:27:10,257 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 [2024-11-14 03:27:10,261 INFO L432 NwaCegarLoop]: 3215 mSDtfsCounter, 3423 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 03:27:10,263 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3423 Valid, 3364 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 03:27:10,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5847 states. [2024-11-14 03:27:10,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5847 to 5819. [2024-11-14 03:27:10,546 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) [2024-11-14 03:27:10,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5819 states to 5819 states and 9217 transitions. [2024-11-14 03:27:10,579 INFO L78 Accepts]: Start accepts. Automaton has 5819 states and 9217 transitions. Word has length 129 [2024-11-14 03:27:10,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:27:10,579 INFO L471 AbstractCegarLoop]: Abstraction has 5819 states and 9217 transitions. [2024-11-14 03:27:10,580 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) [2024-11-14 03:27:10,580 INFO L276 IsEmpty]: Start isEmpty. Operand 5819 states and 9217 transitions. [2024-11-14 03:27:10,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-11-14 03:27:10,596 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:27:10,598 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] [2024-11-14 03:27:10,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-14 03:27:10,598 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:27:10,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:27:10,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1435795576, now seen corresponding path program 1 times [2024-11-14 03:27:10,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:27:10,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129267103] [2024-11-14 03:27:10,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:27:10,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:27:10,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:27:10,758 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-14 03:27:10,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:27:10,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129267103] [2024-11-14 03:27:10,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129267103] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:27:10,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:27:10,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:27:10,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919527012] [2024-11-14 03:27:10,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:27:10,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:27:10,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:27:10,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:27:10,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:27:10,761 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) [2024-11-14 03:27:11,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:27:11,787 INFO L93 Difference]: Finished difference Result 14020 states and 21066 transitions. [2024-11-14 03:27:11,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:27:11,788 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 [2024-11-14 03:27:11,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:27:11,874 INFO L225 Difference]: With dead ends: 14020 [2024-11-14 03:27:11,874 INFO L226 Difference]: Without dead ends: 9847 [2024-11-14 03:27:11,894 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 [2024-11-14 03:27:11,895 INFO L432 NwaCegarLoop]: 3215 mSDtfsCounter, 3425 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:27:11,896 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3425 Valid, 3364 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:27:11,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9847 states. [2024-11-14 03:27:12,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9847 to 9795. [2024-11-14 03:27:12,406 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) [2024-11-14 03:27:12,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9795 states to 9795 states and 14769 transitions. [2024-11-14 03:27:12,454 INFO L78 Accepts]: Start accepts. Automaton has 9795 states and 14769 transitions. Word has length 129 [2024-11-14 03:27:12,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:27:12,456 INFO L471 AbstractCegarLoop]: Abstraction has 9795 states and 14769 transitions. [2024-11-14 03:27:12,456 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) [2024-11-14 03:27:12,456 INFO L276 IsEmpty]: Start isEmpty. Operand 9795 states and 14769 transitions. [2024-11-14 03:27:12,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-11-14 03:27:12,606 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:27:12,607 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] [2024-11-14 03:27:12,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-14 03:27:12,607 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:27:12,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:27:12,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1389821779, now seen corresponding path program 1 times [2024-11-14 03:27:12,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:27:12,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598745031] [2024-11-14 03:27:12,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:27:12,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:27:12,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:27:12,758 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-14 03:27:12,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:27:12,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598745031] [2024-11-14 03:27:12,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598745031] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:27:12,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:27:12,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:27:12,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396072803] [2024-11-14 03:27:12,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:27:12,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:27:12,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:27:12,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:27:12,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:27:12,762 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) [2024-11-14 03:27:14,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:27:14,171 INFO L93 Difference]: Finished difference Result 25804 states and 37658 transitions. [2024-11-14 03:27:14,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:27:14,172 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 [2024-11-14 03:27:14,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:27:14,299 INFO L225 Difference]: With dead ends: 25804 [2024-11-14 03:27:14,300 INFO L226 Difference]: Without dead ends: 17655 [2024-11-14 03:27:14,365 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 [2024-11-14 03:27:14,366 INFO L432 NwaCegarLoop]: 3240 mSDtfsCounter, 3428 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:27:14,366 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3428 Valid, 3389 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:27:14,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17655 states. [2024-11-14 03:27:15,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17655 to 17555. [2024-11-14 03:27:15,880 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) [2024-11-14 03:27:15,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17555 states to 17555 states and 25489 transitions. [2024-11-14 03:27:15,958 INFO L78 Accepts]: Start accepts. Automaton has 17555 states and 25489 transitions. Word has length 129 [2024-11-14 03:27:15,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:27:15,959 INFO L471 AbstractCegarLoop]: Abstraction has 17555 states and 25489 transitions. [2024-11-14 03:27:15,960 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) [2024-11-14 03:27:15,963 INFO L276 IsEmpty]: Start isEmpty. Operand 17555 states and 25489 transitions. [2024-11-14 03:27:16,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2024-11-14 03:27:16,038 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:27:16,039 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] [2024-11-14 03:27:16,039 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-14 03:27:16,039 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:27:16,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:27:16,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1810049769, now seen corresponding path program 1 times [2024-11-14 03:27:16,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:27:16,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253458430] [2024-11-14 03:27:16,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:27:16,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:27:16,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:27:16,475 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-14 03:27:16,476 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:27:16,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253458430] [2024-11-14 03:27:16,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253458430] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:27:16,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495440560] [2024-11-14 03:27:16,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:27:16,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:27:16,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:27:16,480 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:27:16,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 03:27:16,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:27:16,726 INFO L255 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 03:27:16,733 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:27:16,825 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-14 03:27:16,825 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:27:16,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495440560] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:27:16,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:27:16,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-14 03:27:16,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700856045] [2024-11-14 03:27:16,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:27:16,827 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:27:16,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:27:16,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:27:16,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:27:16,829 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) [2024-11-14 03:27:18,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:27:18,374 INFO L93 Difference]: Finished difference Result 25771 states and 37527 transitions. [2024-11-14 03:27:18,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:27:18,375 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 [2024-11-14 03:27:18,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:27:18,483 INFO L225 Difference]: With dead ends: 25771 [2024-11-14 03:27:18,483 INFO L226 Difference]: Without dead ends: 17623 [2024-11-14 03:27:18,516 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 [2024-11-14 03:27:18,518 INFO L432 NwaCegarLoop]: 3333 mSDtfsCounter, 152 mSDsluCounter, 3207 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:27:18,518 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 6540 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:27:18,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17623 states. [2024-11-14 03:27:19,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17623 to 17491. [2024-11-14 03:27:19,709 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) [2024-11-14 03:27:19,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17491 states to 17491 states and 25169 transitions. [2024-11-14 03:27:19,822 INFO L78 Accepts]: Start accepts. Automaton has 17491 states and 25169 transitions. Word has length 150 [2024-11-14 03:27:19,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:27:19,823 INFO L471 AbstractCegarLoop]: Abstraction has 17491 states and 25169 transitions. [2024-11-14 03:27:19,823 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) [2024-11-14 03:27:19,823 INFO L276 IsEmpty]: Start isEmpty. Operand 17491 states and 25169 transitions. [2024-11-14 03:27:19,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2024-11-14 03:27:19,951 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:27:19,951 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] [2024-11-14 03:27:19,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 03:27:20,156 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:27:20,156 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:27:20,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:27:20,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1280539703, now seen corresponding path program 1 times [2024-11-14 03:27:20,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:27:20,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389157476] [2024-11-14 03:27:20,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:27:20,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:27:20,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:27:20,665 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 10 proven. 43 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-14 03:27:20,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:27:20,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389157476] [2024-11-14 03:27:20,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389157476] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:27:20,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407799715] [2024-11-14 03:27:20,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:27:20,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:27:20,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:27:20,669 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:27:20,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 03:27:20,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:27:20,909 INFO L255 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:27:21,073 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:27:21,135 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-14 03:27:21,138 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:27:21,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407799715] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:27:21,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:27:21,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-14 03:27:21,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110736908] [2024-11-14 03:27:21,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:27:21,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:27:21,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:27:21,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:27:21,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:27:21,145 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) [2024-11-14 03:27:22,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:27:22,558 INFO L93 Difference]: Finished difference Result 29313 states and 41134 transitions. [2024-11-14 03:27:22,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:27:22,558 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 [2024-11-14 03:27:22,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:27:22,669 INFO L225 Difference]: With dead ends: 29313 [2024-11-14 03:27:22,669 INFO L226 Difference]: Without dead ends: 21261 [2024-11-14 03:27:22,693 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 [2024-11-14 03:27:22,694 INFO L432 NwaCegarLoop]: 3235 mSDtfsCounter, 3432 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:27:22,694 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3432 Valid, 3274 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:27:22,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21261 states. [2024-11-14 03:27:24,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21261 to 21261. [2024-11-14 03:27:24,380 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) [2024-11-14 03:27:24,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21261 states to 21261 states and 29515 transitions. [2024-11-14 03:27:24,675 INFO L78 Accepts]: Start accepts. Automaton has 21261 states and 29515 transitions. Word has length 150 [2024-11-14 03:27:24,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:27:24,676 INFO L471 AbstractCegarLoop]: Abstraction has 21261 states and 29515 transitions. [2024-11-14 03:27:24,676 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) [2024-11-14 03:27:24,677 INFO L276 IsEmpty]: Start isEmpty. Operand 21261 states and 29515 transitions. [2024-11-14 03:27:24,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2024-11-14 03:27:24,725 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:27:24,726 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] [2024-11-14 03:27:24,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 03:27:24,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:27:24,929 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:27:24,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:27:24,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1624660925, now seen corresponding path program 1 times [2024-11-14 03:27:24,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:27:24,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246862992] [2024-11-14 03:27:24,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:27:24,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:27:25,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:27:25,911 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-11-14 03:27:25,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:27:25,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246862992] [2024-11-14 03:27:25,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246862992] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:27:25,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172913028] [2024-11-14 03:27:25,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:27:25,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:27:25,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:27:25,915 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:27:25,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 03:27:26,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:27:26,244 INFO L255 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-14 03:27:26,254 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:27:26,959 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 66 proven. 29 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 03:27:26,959 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:27:27,830 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 53 proven. 3 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-11-14 03:27:27,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172913028] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:27:27,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1528676250] [2024-11-14 03:27:27,867 INFO L159 IcfgInterpreter]: Started Sifa with 79 locations of interest [2024-11-14 03:27:27,868 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:27:27,872 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:27:27,878 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:27:27,879 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:27:50,145 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 30 for LOIs [2024-11-14 03:27:50,151 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 169 for LOIs [2024-11-14 03:27:50,266 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 86 for LOIs [2024-11-14 03:27:50,318 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 1 for LOIs [2024-11-14 03:27:50,318 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 1 for LOIs [2024-11-14 03:27:50,331 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 146 for LOIs [2024-11-14 03:27:51,068 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 1 for LOIs [2024-11-14 03:27:51,266 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:28:19,397 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 [2024-11-14 03:28:19,397 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:28:19,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:28:19,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 10] total 21 [2024-11-14 03:28:19,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270946061] [2024-11-14 03:28:19,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:28:19,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-14 03:28:19,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:28:19,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-14 03:28:19,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=4723, Unknown=0, NotChecked=0, Total=5112 [2024-11-14 03:28:19,403 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) [2024-11-14 03:28:27,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:28:27,027 INFO L93 Difference]: Finished difference Result 74201 states and 101073 transitions. [2024-11-14 03:28:27,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-14 03:28:27,028 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 [2024-11-14 03:28:27,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:28:27,259 INFO L225 Difference]: With dead ends: 74201 [2024-11-14 03:28:27,259 INFO L226 Difference]: Without dead ends: 54587 [2024-11-14 03:28:27,326 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 398 SyntacticMatches, 6 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3375 ImplicationChecksByTransitivity, 30.4s TimeCoverageRelationStatistics Valid=977, Invalid=9325, Unknown=0, NotChecked=0, Total=10302 [2024-11-14 03:28:27,327 INFO L432 NwaCegarLoop]: 3183 mSDtfsCounter, 12839 mSDsluCounter, 28503 mSDsCounter, 0 mSdLazyCounter, 3620 mSolverCounterSat, 777 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s 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, 3.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:28:27,328 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12839 Valid, 31686 Invalid, 4397 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [777 Valid, 3620 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-11-14 03:28:27,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54587 states. [2024-11-14 03:28:29,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54587 to 49663. [2024-11-14 03:28:29,772 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) [2024-11-14 03:28:29,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49663 states to 49663 states and 66197 transitions. [2024-11-14 03:28:29,949 INFO L78 Accepts]: Start accepts. Automaton has 49663 states and 66197 transitions. Word has length 149 [2024-11-14 03:28:29,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:28:29,950 INFO L471 AbstractCegarLoop]: Abstraction has 49663 states and 66197 transitions. [2024-11-14 03:28:29,950 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) [2024-11-14 03:28:29,950 INFO L276 IsEmpty]: Start isEmpty. Operand 49663 states and 66197 transitions. [2024-11-14 03:28:30,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2024-11-14 03:28:30,040 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:28:30,041 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] [2024-11-14 03:28:30,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 03:28:30,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:28:30,245 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:28:30,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:28:30,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1689679776, now seen corresponding path program 1 times [2024-11-14 03:28:30,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:28:30,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224566915] [2024-11-14 03:28:30,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:28:30,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:28:30,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:28:30,552 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-14 03:28:30,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:28:30,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224566915] [2024-11-14 03:28:30,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224566915] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:28:30,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620057055] [2024-11-14 03:28:30,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:28:30,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:28:30,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:28:30,555 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:28:30,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 03:28:30,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:28:30,755 INFO L255 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 03:28:30,758 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:28:30,795 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-14 03:28:30,795 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:28:30,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620057055] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:28:30,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:28:30,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-14 03:28:30,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105688688] [2024-11-14 03:28:30,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:28:30,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:28:30,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:28:30,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:28:30,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:28:30,799 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) [2024-11-14 03:28:35,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:28:35,242 INFO L93 Difference]: Finished difference Result 114195 states and 152764 transitions. [2024-11-14 03:28:35,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:28:35,243 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 [2024-11-14 03:28:35,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:28:35,600 INFO L225 Difference]: With dead ends: 114195 [2024-11-14 03:28:35,600 INFO L226 Difference]: Without dead ends: 66179 [2024-11-14 03:28:35,713 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 [2024-11-14 03:28:35,713 INFO L432 NwaCegarLoop]: 3229 mSDtfsCounter, 90 mSDsluCounter, 3197 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:28:35,714 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 6426 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:28:35,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66179 states. [2024-11-14 03:28:38,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66179 to 55023. [2024-11-14 03:28:38,398 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) [2024-11-14 03:28:38,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55023 states to 55023 states and 74269 transitions. [2024-11-14 03:28:38,639 INFO L78 Accepts]: Start accepts. Automaton has 55023 states and 74269 transitions. Word has length 148 [2024-11-14 03:28:38,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:28:38,643 INFO L471 AbstractCegarLoop]: Abstraction has 55023 states and 74269 transitions. [2024-11-14 03:28:38,643 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) [2024-11-14 03:28:38,643 INFO L276 IsEmpty]: Start isEmpty. Operand 55023 states and 74269 transitions. [2024-11-14 03:28:38,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2024-11-14 03:28:38,848 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:28:38,848 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] [2024-11-14 03:28:38,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 03:28:39,049 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-14 03:28:39,050 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:28:39,050 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:28:39,053 INFO L85 PathProgramCache]: Analyzing trace with hash 927385199, now seen corresponding path program 1 times [2024-11-14 03:28:39,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:28:39,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028107276] [2024-11-14 03:28:39,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:28:39,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:28:39,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:28:39,939 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-11-14 03:28:39,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:28:39,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028107276] [2024-11-14 03:28:39,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028107276] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:28:39,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401687199] [2024-11-14 03:28:39,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:28:39,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:28:39,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:28:39,944 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:28:40,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 03:28:40,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:28:40,524 INFO L255 TraceCheckSpWp]: Trace formula consists of 820 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-14 03:28:40,536 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:28:40,944 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-14 03:28:40,944 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:28:40,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401687199] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:28:40,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:28:40,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-14 03:28:40,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443966226] [2024-11-14 03:28:40,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:28:40,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:28:40,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:28:40,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:28:40,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-14 03:28:40,950 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) [2024-11-14 03:28:45,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:28:45,051 INFO L93 Difference]: Finished difference Result 88105 states and 118766 transitions. [2024-11-14 03:28:45,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 03:28:45,051 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 [2024-11-14 03:28:45,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:28:45,303 INFO L225 Difference]: With dead ends: 88105 [2024-11-14 03:28:45,303 INFO L226 Difference]: Without dead ends: 60687 [2024-11-14 03:28:45,371 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 [2024-11-14 03:28:45,372 INFO L432 NwaCegarLoop]: 3315 mSDtfsCounter, 135 mSDsluCounter, 9666 mSDsCounter, 0 mSdLazyCounter, 1186 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:28:45,375 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 12981 Invalid, 1220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1186 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-14 03:28:45,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60687 states. [2024-11-14 03:28:49,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60687 to 59967. [2024-11-14 03:28:49,431 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) [2024-11-14 03:28:49,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59967 states to 59967 states and 81149 transitions. [2024-11-14 03:28:49,637 INFO L78 Accepts]: Start accepts. Automaton has 59967 states and 81149 transitions. Word has length 152 [2024-11-14 03:28:49,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:28:49,639 INFO L471 AbstractCegarLoop]: Abstraction has 59967 states and 81149 transitions. [2024-11-14 03:28:49,640 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) [2024-11-14 03:28:49,640 INFO L276 IsEmpty]: Start isEmpty. Operand 59967 states and 81149 transitions. [2024-11-14 03:28:49,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2024-11-14 03:28:49,756 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:28:49,756 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] [2024-11-14 03:28:49,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 03:28:49,956 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-14 03:28:49,957 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:28:49,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:28:49,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1696236964, now seen corresponding path program 1 times [2024-11-14 03:28:49,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:28:49,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830823418] [2024-11-14 03:28:49,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:28:49,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:28:49,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:28:50,099 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-11-14 03:28:50,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:28:50,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830823418] [2024-11-14 03:28:50,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830823418] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:28:50,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003322622] [2024-11-14 03:28:50,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:28:50,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:28:50,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:28:50,102 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:28:50,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 03:28:50,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:28:50,302 INFO L255 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:28:50,306 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:28:50,342 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-14 03:28:50,342 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:28:50,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003322622] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:28:50,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:28:50,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-14 03:28:50,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144694671] [2024-11-14 03:28:50,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:28:50,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:28:50,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:28:50,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:28:50,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:28:50,344 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) [2024-11-14 03:28:55,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:28:55,283 INFO L93 Difference]: Finished difference Result 134531 states and 182613 transitions. [2024-11-14 03:28:55,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:28:55,284 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 150 [2024-11-14 03:28:55,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:28:55,878 INFO L225 Difference]: With dead ends: 134531 [2024-11-14 03:28:55,879 INFO L226 Difference]: Without dead ends: 91137 [2024-11-14 03:28:56,266 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:28:56,268 INFO L432 NwaCegarLoop]: 3323 mSDtfsCounter, 120 mSDsluCounter, 3221 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 6544 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:28:56,268 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 6544 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 03:28:56,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91137 states. [2024-11-14 03:29:00,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91137 to 74627. [2024-11-14 03:29:00,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74627 states, 65507 states have (on average 1.4006289404185812) internal successors, (91751), 65727 states have internal predecessors, (91751), 5468 states have call successors, (5468), 3651 states have call predecessors, (5468), 3650 states have return successors, (5466), 5249 states have call predecessors, (5466), 5466 states have call successors, (5466) [2024-11-14 03:29:00,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74627 states to 74627 states and 102685 transitions. [2024-11-14 03:29:00,729 INFO L78 Accepts]: Start accepts. Automaton has 74627 states and 102685 transitions. Word has length 150 [2024-11-14 03:29:00,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:29:00,729 INFO L471 AbstractCegarLoop]: Abstraction has 74627 states and 102685 transitions. [2024-11-14 03:29:00,729 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2024-11-14 03:29:00,729 INFO L276 IsEmpty]: Start isEmpty. Operand 74627 states and 102685 transitions. [2024-11-14 03:29:00,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2024-11-14 03:29:00,813 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:29:00,814 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, 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] [2024-11-14 03:29:00,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 03:29:01,014 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-14 03:29:01,077 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:29:01,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:29:01,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1563959172, now seen corresponding path program 1 times [2024-11-14 03:29:01,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:29:01,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393312083] [2024-11-14 03:29:01,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:29:01,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:29:01,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:29:01,507 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 17 proven. 45 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-14 03:29:01,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:29:01,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393312083] [2024-11-14 03:29:01,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393312083] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:29:01,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254563695] [2024-11-14 03:29:01,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:29:01,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:29:01,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:29:01,510 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:29:01,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 03:29:01,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:29:01,712 INFO L255 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 03:29:01,715 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:29:01,768 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 03:29:01,769 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:29:01,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254563695] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:29:01,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:29:01,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-14 03:29:01,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48911929] [2024-11-14 03:29:01,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:29:01,771 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:29:01,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:29:01,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:29:01,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:29:01,773 INFO L87 Difference]: Start difference. First operand 74627 states and 102685 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 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) [2024-11-14 03:29:06,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:29:06,613 INFO L93 Difference]: Finished difference Result 129119 states and 179418 transitions. [2024-11-14 03:29:06,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:29:06,614 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 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 152 [2024-11-14 03:29:06,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:29:06,939 INFO L225 Difference]: With dead ends: 129119 [2024-11-14 03:29:06,939 INFO L226 Difference]: Without dead ends: 71019 [2024-11-14 03:29:07,054 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:29:07,054 INFO L432 NwaCegarLoop]: 3334 mSDtfsCounter, 145 mSDsluCounter, 3193 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 6527 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:29:07,055 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 6527 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 03:29:07,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71019 states. [2024-11-14 03:29:10,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71019 to 70347. [2024-11-14 03:29:10,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70347 states, 61419 states have (on average 1.3792311825330923) internal successors, (84711), 61639 states have internal predecessors, (84711), 5372 states have call successors, (5372), 3555 states have call predecessors, (5372), 3554 states have return successors, (5370), 5153 states have call predecessors, (5370), 5370 states have call successors, (5370) [2024-11-14 03:29:11,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70347 states to 70347 states and 95453 transitions. [2024-11-14 03:29:11,251 INFO L78 Accepts]: Start accepts. Automaton has 70347 states and 95453 transitions. Word has length 152 [2024-11-14 03:29:11,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:29:11,251 INFO L471 AbstractCegarLoop]: Abstraction has 70347 states and 95453 transitions. [2024-11-14 03:29:11,251 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 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) [2024-11-14 03:29:11,252 INFO L276 IsEmpty]: Start isEmpty. Operand 70347 states and 95453 transitions. [2024-11-14 03:29:11,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2024-11-14 03:29:11,322 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:29:11,322 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, 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] [2024-11-14 03:29:11,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 03:29:11,523 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-14 03:29:11,524 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:29:11,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:29:11,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1100417188, now seen corresponding path program 1 times [2024-11-14 03:29:11,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:29:11,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896588885] [2024-11-14 03:29:11,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:29:11,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:29:11,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:29:12,048 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 17 proven. 43 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-14 03:29:12,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:29:12,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896588885] [2024-11-14 03:29:12,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896588885] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:29:12,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865156619] [2024-11-14 03:29:12,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:29:12,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:29:12,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:29:12,053 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:29:12,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 03:29:12,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:29:12,373 INFO L255 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 03:29:12,377 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:29:12,710 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-14 03:29:12,711 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:29:12,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865156619] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:29:12,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:29:12,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2024-11-14 03:29:12,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486829332] [2024-11-14 03:29:12,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:29:12,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 03:29:12,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:29:12,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 03:29:12,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-14 03:29:12,714 INFO L87 Difference]: Start difference. First operand 70347 states and 95453 transitions. Second operand has 6 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-14 03:29:17,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:29:17,824 INFO L93 Difference]: Finished difference Result 125007 states and 169296 transitions. [2024-11-14 03:29:17,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 03:29:17,824 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 152 [2024-11-14 03:29:17,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:29:18,035 INFO L225 Difference]: With dead ends: 125007 [2024-11-14 03:29:18,035 INFO L226 Difference]: Without dead ends: 76299 [2024-11-14 03:29:18,106 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-11-14 03:29:18,106 INFO L432 NwaCegarLoop]: 3158 mSDtfsCounter, 3514 mSDsluCounter, 9400 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3526 SdHoareTripleChecker+Valid, 12558 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:29:18,107 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3526 Valid, 12558 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1217 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-14 03:29:18,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76299 states. [2024-11-14 03:29:22,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76299 to 75771. [2024-11-14 03:29:22,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75771 states, 66351 states have (on average 1.358005154406113) internal successors, (90105), 66571 states have internal predecessors, (90105), 5528 states have call successors, (5528), 3891 states have call predecessors, (5528), 3890 states have return successors, (5526), 5309 states have call predecessors, (5526), 5526 states have call successors, (5526) [2024-11-14 03:29:22,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75771 states to 75771 states and 101159 transitions. [2024-11-14 03:29:22,675 INFO L78 Accepts]: Start accepts. Automaton has 75771 states and 101159 transitions. Word has length 152 [2024-11-14 03:29:22,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:29:22,676 INFO L471 AbstractCegarLoop]: Abstraction has 75771 states and 101159 transitions. [2024-11-14 03:29:22,676 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-14 03:29:22,676 INFO L276 IsEmpty]: Start isEmpty. Operand 75771 states and 101159 transitions. [2024-11-14 03:29:22,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2024-11-14 03:29:22,958 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:29:22,959 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, 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] [2024-11-14 03:29:22,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-14 03:29:23,164 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-14 03:29:23,164 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:29:23,165 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:29:23,165 INFO L85 PathProgramCache]: Analyzing trace with hash -674941374, now seen corresponding path program 1 times [2024-11-14 03:29:23,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:29:23,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804607651] [2024-11-14 03:29:23,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:29:23,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:29:23,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:29:23,546 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 17 proven. 45 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2024-11-14 03:29:23,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:29:23,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804607651] [2024-11-14 03:29:23,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804607651] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:29:23,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016197252] [2024-11-14 03:29:23,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:29:23,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:29:23,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:29:23,550 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:29:23,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 03:29:23,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:29:23,837 INFO L255 TraceCheckSpWp]: Trace formula consists of 728 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-14 03:29:23,845 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:29:24,153 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:29:24,154 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:29:24,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016197252] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:29:24,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:29:24,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-14 03:29:24,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220076020] [2024-11-14 03:29:24,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:29:24,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:29:24,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:29:24,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:29:24,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-14 03:29:24,159 INFO L87 Difference]: Start difference. First operand 75771 states and 101159 transitions. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 4 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-14 03:29:29,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:29:29,126 INFO L93 Difference]: Finished difference Result 135703 states and 179641 transitions. [2024-11-14 03:29:29,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 03:29:29,127 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 4 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 154 [2024-11-14 03:29:29,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:29:29,474 INFO L225 Difference]: With dead ends: 135703 [2024-11-14 03:29:29,474 INFO L226 Difference]: Without dead ends: 82971 [2024-11-14 03:29:29,524 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-14 03:29:29,524 INFO L432 NwaCegarLoop]: 3314 mSDtfsCounter, 158 mSDsluCounter, 6449 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 9763 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 03:29:29,524 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 9763 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 03:29:29,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82971 states. [2024-11-14 03:29:34,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82971 to 78083. [2024-11-14 03:29:34,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78083 states, 67487 states have (on average 1.3325677537896188) internal successors, (89931), 67863 states have internal predecessors, (89931), 6088 states have call successors, (6088), 4243 states have call predecessors, (6088), 4506 states have return successors, (6614), 5977 states have call predecessors, (6614), 6086 states have call successors, (6614) [2024-11-14 03:29:34,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78083 states to 78083 states and 102633 transitions. [2024-11-14 03:29:34,435 INFO L78 Accepts]: Start accepts. Automaton has 78083 states and 102633 transitions. Word has length 154 [2024-11-14 03:29:34,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:29:34,436 INFO L471 AbstractCegarLoop]: Abstraction has 78083 states and 102633 transitions. [2024-11-14 03:29:34,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 4 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-14 03:29:34,436 INFO L276 IsEmpty]: Start isEmpty. Operand 78083 states and 102633 transitions. [2024-11-14 03:29:34,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2024-11-14 03:29:34,852 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:29:34,852 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2024-11-14 03:29:34,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-14 03:29:35,052 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-14 03:29:35,052 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:29:35,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:29:35,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1972809824, now seen corresponding path program 1 times [2024-11-14 03:29:35,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:29:35,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192718595] [2024-11-14 03:29:35,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:29:35,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:29:35,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:29:35,175 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-14 03:29:35,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:29:35,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192718595] [2024-11-14 03:29:35,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192718595] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:29:35,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324421875] [2024-11-14 03:29:35,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:29:35,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:29:35,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:29:35,178 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:29:35,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 03:29:35,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:29:35,393 INFO L255 TraceCheckSpWp]: Trace formula consists of 868 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:29:35,396 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:29:35,436 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-14 03:29:35,436 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:29:35,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324421875] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:29:35,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:29:35,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-14 03:29:35,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439666319] [2024-11-14 03:29:35,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:29:35,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:29:35,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:29:35,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:29:35,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:29:35,438 INFO L87 Difference]: Start difference. First operand 78083 states and 102633 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-14 03:29:41,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:29:41,394 INFO L93 Difference]: Finished difference Result 176443 states and 233123 transitions. [2024-11-14 03:29:41,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:29:41,395 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 189 [2024-11-14 03:29:41,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:29:41,671 INFO L225 Difference]: With dead ends: 176443 [2024-11-14 03:29:41,672 INFO L226 Difference]: Without dead ends: 115371 [2024-11-14 03:29:41,741 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:29:41,742 INFO L432 NwaCegarLoop]: 3325 mSDtfsCounter, 110 mSDsluCounter, 3219 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 6544 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:29:41,742 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 6544 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 03:29:41,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115371 states. [2024-11-14 03:29:47,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115371 to 93339. [2024-11-14 03:29:47,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93339 states, 81735 states have (on average 1.35524561081544) internal successors, (110771), 82111 states have internal predecessors, (110771), 6592 states have call successors, (6592), 4747 states have call predecessors, (6592), 5010 states have return successors, (7118), 6481 states have call predecessors, (7118), 6590 states have call successors, (7118) [2024-11-14 03:29:47,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93339 states to 93339 states and 124481 transitions. [2024-11-14 03:29:47,614 INFO L78 Accepts]: Start accepts. Automaton has 93339 states and 124481 transitions. Word has length 189 [2024-11-14 03:29:47,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:29:47,615 INFO L471 AbstractCegarLoop]: Abstraction has 93339 states and 124481 transitions. [2024-11-14 03:29:47,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-14 03:29:47,615 INFO L276 IsEmpty]: Start isEmpty. Operand 93339 states and 124481 transitions. [2024-11-14 03:29:47,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2024-11-14 03:29:47,690 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:29:47,690 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2024-11-14 03:29:47,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-14 03:29:47,890 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-14 03:29:47,890 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:29:47,890 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:29:47,891 INFO L85 PathProgramCache]: Analyzing trace with hash 856940618, now seen corresponding path program 1 times [2024-11-14 03:29:47,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:29:47,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083367303] [2024-11-14 03:29:47,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:29:47,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:29:47,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:29:48,153 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 17 proven. 64 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2024-11-14 03:29:48,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:29:48,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083367303] [2024-11-14 03:29:48,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083367303] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:29:48,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578551079] [2024-11-14 03:29:48,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:29:48,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:29:48,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:29:48,156 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:29:48,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5869ad5-48a7-4ab5-9b31-12fdd1d7700a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 03:29:48,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:29:48,354 INFO L255 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 03:29:48,357 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:29:48,438 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-14 03:29:48,438 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:29:48,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578551079] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:29:48,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:29:48,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-14 03:29:48,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745703951] [2024-11-14 03:29:48,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:29:48,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:29:48,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:29:48,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:29:48,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:29:48,440 INFO L87 Difference]: Start difference. First operand 93339 states and 124481 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 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)