./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label47+token_ring.07.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_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/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_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label47+token_ring.07.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/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_7e6bb60a-4116-4d51-9748-eb722b7f7952/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 099a6a574a6046de5acacffb386ced7bed15faed2715ea5faa9de06eb0c5ca5a --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 05:33:28,890 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 05:33:28,970 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 05:33:28,974 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 05:33:28,975 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 05:33:28,998 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 05:33:28,998 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 05:33:28,998 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 05:33:28,999 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 05:33:28,999 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 05:33:28,999 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 05:33:28,999 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 05:33:28,999 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 05:33:28,999 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 05:33:28,999 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 05:33:29,003 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 05:33:29,003 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 05:33:29,003 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 05:33:29,004 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 05:33:29,004 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 05:33:29,004 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 05:33:29,004 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 05:33:29,004 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 05:33:29,005 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 05:33:29,005 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 05:33:29,005 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 05:33:29,005 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 05:33:29,005 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 05:33:29,005 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 05:33:29,005 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 05:33:29,005 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 05:33:29,005 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 05:33:29,006 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 05:33:29,006 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 05:33:29,006 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 05:33:29,006 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 05:33:29,006 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 05:33:29,006 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 05:33:29,006 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 05:33:29,006 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 05:33:29,009 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 05:33:29,009 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 05:33:29,009 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 05:33:29,009 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 05:33:29,009 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 05:33:29,009 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 05:33:29,009 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 05:33:29,009 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_7e6bb60a-4116-4d51-9748-eb722b7f7952/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 -> 099a6a574a6046de5acacffb386ced7bed15faed2715ea5faa9de06eb0c5ca5a [2024-11-14 05:33:29,312 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 05:33:29,325 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 05:33:29,329 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 05:33:29,332 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 05:33:29,332 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 05:33:29,333 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/combinations/Problem05_label47+token_ring.07.cil-1.c Unable to find full path for "g++" [2024-11-14 05:33:31,357 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 05:33:32,073 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 05:33:32,076 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/sv-benchmarks/c/combinations/Problem05_label47+token_ring.07.cil-1.c [2024-11-14 05:33:32,138 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/data/127a2b92c/e4754f4fe54443809c5f768e8720fec2/FLAGcbda479d7 [2024-11-14 05:33:32,156 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/data/127a2b92c/e4754f4fe54443809c5f768e8720fec2 [2024-11-14 05:33:32,160 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 05:33:32,162 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 05:33:32,165 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 05:33:32,165 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 05:33:32,169 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 05:33:32,170 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:33:32" (1/1) ... [2024-11-14 05:33:32,171 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71571c61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:33:32, skipping insertion in model container [2024-11-14 05:33:32,171 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:33:32" (1/1) ... [2024-11-14 05:33:32,402 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 05:33:34,343 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_7e6bb60a-4116-4d51-9748-eb722b7f7952/sv-benchmarks/c/combinations/Problem05_label47+token_ring.07.cil-1.c[377612,377625] [2024-11-14 05:33:34,399 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_7e6bb60a-4116-4d51-9748-eb722b7f7952/sv-benchmarks/c/combinations/Problem05_label47+token_ring.07.cil-1.c[383339,383352] [2024-11-14 05:33:34,676 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:33:34,690 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 05:33:35,858 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_7e6bb60a-4116-4d51-9748-eb722b7f7952/sv-benchmarks/c/combinations/Problem05_label47+token_ring.07.cil-1.c[377612,377625] [2024-11-14 05:33:35,866 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_7e6bb60a-4116-4d51-9748-eb722b7f7952/sv-benchmarks/c/combinations/Problem05_label47+token_ring.07.cil-1.c[383339,383352] [2024-11-14 05:33:35,893 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:33:35,963 INFO L204 MainTranslator]: Completed translation [2024-11-14 05:33:35,963 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:33:35 WrapperNode [2024-11-14 05:33:35,964 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 05:33:35,966 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 05:33:35,966 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 05:33:35,966 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 05:33:35,974 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:33:35" (1/1) ... [2024-11-14 05:33:36,076 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:33:35" (1/1) ... [2024-11-14 05:33:36,581 INFO L138 Inliner]: procedures = 58, calls = 62, calls flagged for inlining = 36, calls inlined = 36, statements flattened = 12922 [2024-11-14 05:33:36,581 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 05:33:36,583 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 05:33:36,583 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 05:33:36,583 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 05:33:36,591 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:33:35" (1/1) ... [2024-11-14 05:33:36,592 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:33:35" (1/1) ... [2024-11-14 05:33:36,631 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:33:35" (1/1) ... [2024-11-14 05:33:36,631 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:33:35" (1/1) ... [2024-11-14 05:33:36,798 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:33:35" (1/1) ... [2024-11-14 05:33:36,849 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:33:35" (1/1) ... [2024-11-14 05:33:36,873 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:33:35" (1/1) ... [2024-11-14 05:33:36,895 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:33:35" (1/1) ... [2024-11-14 05:33:36,940 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 05:33:36,942 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 05:33:36,943 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 05:33:36,943 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 05:33:37,004 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:33:35" (1/1) ... [2024-11-14 05:33:37,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 05:33:37,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:33:37,045 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 05:33:37,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 05:33:37,076 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 05:33:37,076 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2024-11-14 05:33:37,077 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2024-11-14 05:33:37,077 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-14 05:33:37,077 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-14 05:33:37,077 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2024-11-14 05:33:37,077 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2024-11-14 05:33:37,078 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2024-11-14 05:33:37,078 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2024-11-14 05:33:37,078 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2024-11-14 05:33:37,078 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2024-11-14 05:33:37,078 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2024-11-14 05:33:37,078 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2024-11-14 05:33:37,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 05:33:37,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 05:33:37,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 05:33:37,224 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 05:33:37,226 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 05:33:49,046 INFO L? ?]: Removed 1725 outVars from TransFormulas that were not future-live. [2024-11-14 05:33:49,046 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 05:33:51,595 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 05:33:51,596 INFO L316 CfgBuilder]: Removed 11 assume(true) statements. [2024-11-14 05:33:51,596 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:33:51 BoogieIcfgContainer [2024-11-14 05:33:51,596 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 05:33:51,599 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 05:33:51,599 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 05:33:51,604 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 05:33:51,604 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 05:33:32" (1/3) ... [2024-11-14 05:33:51,607 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@137237f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 05:33:51, skipping insertion in model container [2024-11-14 05:33:51,607 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:33:35" (2/3) ... [2024-11-14 05:33:51,608 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@137237f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 05:33:51, skipping insertion in model container [2024-11-14 05:33:51,609 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:33:51" (3/3) ... [2024-11-14 05:33:51,610 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label47+token_ring.07.cil-1.c [2024-11-14 05:33:51,628 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 05:33:51,631 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG Problem05_label47+token_ring.07.cil-1.c that has 7 procedures, 1784 locations, 1 initial locations, 11 loop locations, and 2 error locations. [2024-11-14 05:33:51,743 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 05:33:51,759 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;@4e8cae8a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 05:33:51,760 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-14 05:33:51,773 INFO L276 IsEmpty]: Start isEmpty. Operand has 1784 states, 1754 states have (on average 1.9618015963511972) internal successors, (3441), 1757 states have internal predecessors, (3441), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-11-14 05:33:51,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-14 05:33:51,784 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:33:51,784 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, 1, 1] [2024-11-14 05:33:51,785 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:33:51,790 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:33:51,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1564340217, now seen corresponding path program 1 times [2024-11-14 05:33:51,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:33:51,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338142009] [2024-11-14 05:33:51,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:33:51,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:33:51,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:33:52,341 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 05:33:52,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:33:52,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338142009] [2024-11-14 05:33:52,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338142009] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:33:52,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:33:52,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 05:33:52,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371556952] [2024-11-14 05:33:52,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:33:52,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 05:33:52,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:33:52,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 05:33:52,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:33:52,380 INFO L87 Difference]: Start difference. First operand has 1784 states, 1754 states have (on average 1.9618015963511972) internal successors, (3441), 1757 states have internal predecessors, (3441), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 05:33:53,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:33:53,487 INFO L93 Difference]: Finished difference Result 3692 states and 7171 transitions. [2024-11-14 05:33:53,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 05:33:53,490 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2024-11-14 05:33:53,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:33:53,509 INFO L225 Difference]: With dead ends: 3692 [2024-11-14 05:33:53,509 INFO L226 Difference]: Without dead ends: 1907 [2024-11-14 05:33:53,517 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 05:33:53,520 INFO L432 NwaCegarLoop]: 3377 mSDtfsCounter, 3630 mSDsluCounter, 3299 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3630 SdHoareTripleChecker+Valid, 6676 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 05:33:53,524 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3630 Valid, 6676 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 05:33:53,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2024-11-14 05:33:53,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 1906. [2024-11-14 05:33:53,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1854 states have (on average 1.9288025889967637) internal successors, (3576), 1857 states have internal predecessors, (3576), 38 states have call successors, (38), 12 states have call predecessors, (38), 12 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2024-11-14 05:33:53,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 3652 transitions. [2024-11-14 05:33:53,675 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 3652 transitions. Word has length 52 [2024-11-14 05:33:53,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:33:53,675 INFO L471 AbstractCegarLoop]: Abstraction has 1906 states and 3652 transitions. [2024-11-14 05:33:53,675 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 05:33:53,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 3652 transitions. [2024-11-14 05:33:53,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-14 05:33:53,685 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:33:53,685 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, 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 05:33:53,685 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 05:33:53,685 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:33:53,686 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:33:53,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1978941421, now seen corresponding path program 1 times [2024-11-14 05:33:53,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:33:53,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985651705] [2024-11-14 05:33:53,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:33:53,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:33:53,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:33:54,060 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 05:33:54,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:33:54,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985651705] [2024-11-14 05:33:54,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985651705] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:33:54,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419850966] [2024-11-14 05:33:54,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:33:54,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:33:54,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:33:54,063 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:33:54,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 05:33:54,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:33:54,263 INFO L255 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 05:33:54,271 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:33:54,342 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 05:33:54,343 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:33:54,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419850966] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:33:54,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:33:54,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 05:33:54,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435649045] [2024-11-14 05:33:54,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:33:54,345 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:33:54,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:33:54,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:33:54,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:33:54,346 INFO L87 Difference]: Start difference. First operand 1906 states and 3652 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:33:54,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:33:54,916 INFO L93 Difference]: Finished difference Result 2419 states and 4413 transitions. [2024-11-14 05:33:54,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:33:54,917 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2024-11-14 05:33:54,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:33:54,932 INFO L225 Difference]: With dead ends: 2419 [2024-11-14 05:33:54,933 INFO L226 Difference]: Without dead ends: 2159 [2024-11-14 05:33:54,936 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 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 05:33:54,937 INFO L432 NwaCegarLoop]: 3265 mSDtfsCounter, 3443 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3443 SdHoareTripleChecker+Valid, 3423 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:33:54,938 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3443 Valid, 3423 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 05:33:54,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2159 states. [2024-11-14 05:33:55,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2159 to 2155. [2024-11-14 05:33:55,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2155 states, 2059 states have (on average 1.8790675084992714) internal successors, (3869), 2063 states have internal predecessors, (3869), 70 states have call successors, (70), 24 states have call predecessors, (70), 24 states have return successors, (70), 68 states have call predecessors, (70), 70 states have call successors, (70) [2024-11-14 05:33:55,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2155 states to 2155 states and 4009 transitions. [2024-11-14 05:33:55,057 INFO L78 Accepts]: Start accepts. Automaton has 2155 states and 4009 transitions. Word has length 102 [2024-11-14 05:33:55,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:33:55,057 INFO L471 AbstractCegarLoop]: Abstraction has 2155 states and 4009 transitions. [2024-11-14 05:33:55,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:33:55,060 INFO L276 IsEmpty]: Start isEmpty. Operand 2155 states and 4009 transitions. [2024-11-14 05:33:55,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-14 05:33:55,069 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:33:55,069 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, 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 05:33:55,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 05:33:55,271 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:33:55,273 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:33:55,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:33:55,274 INFO L85 PathProgramCache]: Analyzing trace with hash 394103915, now seen corresponding path program 1 times [2024-11-14 05:33:55,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:33:55,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799478699] [2024-11-14 05:33:55,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:33:55,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:33:55,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:33:55,516 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 05:33:55,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:33:55,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799478699] [2024-11-14 05:33:55,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799478699] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:33:55,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824898452] [2024-11-14 05:33:55,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:33:55,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:33:55,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:33:55,519 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:33:55,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 05:33:55,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:33:55,719 INFO L255 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 05:33:55,721 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:33:55,784 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 05:33:55,784 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:33:55,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824898452] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:33:55,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:33:55,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 05:33:55,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821980712] [2024-11-14 05:33:55,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:33:55,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:33:55,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:33:55,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:33:55,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:33:55,790 INFO L87 Difference]: Start difference. First operand 2155 states and 4009 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:33:56,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:33:56,456 INFO L93 Difference]: Finished difference Result 3160 states and 5492 transitions. [2024-11-14 05:33:56,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:33:56,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2024-11-14 05:33:56,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:33:56,471 INFO L225 Difference]: With dead ends: 3160 [2024-11-14 05:33:56,472 INFO L226 Difference]: Without dead ends: 2651 [2024-11-14 05:33:56,475 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 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 05:33:56,476 INFO L432 NwaCegarLoop]: 3240 mSDtfsCounter, 3437 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3437 SdHoareTripleChecker+Valid, 3398 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 05:33:56,476 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3437 Valid, 3398 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 05:33:56,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2024-11-14 05:33:56,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 2645. [2024-11-14 05:33:56,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2645 states, 2463 states have (on average 1.8038976857490865) internal successors, (4443), 2469 states have internal predecessors, (4443), 132 states have call successors, (132), 48 states have call predecessors, (132), 48 states have return successors, (132), 128 states have call predecessors, (132), 132 states have call successors, (132) [2024-11-14 05:33:56,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 4707 transitions. [2024-11-14 05:33:56,599 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 4707 transitions. Word has length 102 [2024-11-14 05:33:56,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:33:56,599 INFO L471 AbstractCegarLoop]: Abstraction has 2645 states and 4707 transitions. [2024-11-14 05:33:56,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:33:56,600 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 4707 transitions. [2024-11-14 05:33:56,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-14 05:33:56,604 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:33:56,604 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, 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 05:33:56,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 05:33:56,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:33:56,805 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:33:56,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:33:56,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1155428503, now seen corresponding path program 1 times [2024-11-14 05:33:56,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:33:56,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241734629] [2024-11-14 05:33:56,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:33:56,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:33:56,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:33:57,010 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 05:33:57,010 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:33:57,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241734629] [2024-11-14 05:33:57,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241734629] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:33:57,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245989143] [2024-11-14 05:33:57,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:33:57,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:33:57,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:33:57,016 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:33:57,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 05:33:57,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:33:57,197 INFO L255 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 05:33:57,201 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:33:57,239 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-14 05:33:57,239 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:33:57,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245989143] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:33:57,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:33:57,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 05:33:57,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988042340] [2024-11-14 05:33:57,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:33:57,240 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:33:57,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:33:57,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:33:57,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:33:57,242 INFO L87 Difference]: Start difference. First operand 2645 states and 4707 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:33:57,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:33:57,879 INFO L93 Difference]: Finished difference Result 4618 states and 7600 transitions. [2024-11-14 05:33:57,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:33:57,880 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2024-11-14 05:33:57,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:33:57,907 INFO L225 Difference]: With dead ends: 4618 [2024-11-14 05:33:57,908 INFO L226 Difference]: Without dead ends: 3619 [2024-11-14 05:33:57,914 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 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 05:33:57,916 INFO L432 NwaCegarLoop]: 3261 mSDtfsCounter, 3446 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3446 SdHoareTripleChecker+Valid, 3419 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:33:57,916 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3446 Valid, 3419 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 05:33:57,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3619 states. [2024-11-14 05:33:58,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3619 to 3609. [2024-11-14 05:33:58,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3609 states, 3259 states have (on average 1.708192697146364) internal successors, (5567), 3269 states have internal predecessors, (5567), 252 states have call successors, (252), 96 states have call predecessors, (252), 96 states have return successors, (252), 244 states have call predecessors, (252), 252 states have call successors, (252) [2024-11-14 05:33:58,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3609 states to 3609 states and 6071 transitions. [2024-11-14 05:33:58,142 INFO L78 Accepts]: Start accepts. Automaton has 3609 states and 6071 transitions. Word has length 102 [2024-11-14 05:33:58,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:33:58,143 INFO L471 AbstractCegarLoop]: Abstraction has 3609 states and 6071 transitions. [2024-11-14 05:33:58,143 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:33:58,143 INFO L276 IsEmpty]: Start isEmpty. Operand 3609 states and 6071 transitions. [2024-11-14 05:33:58,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-14 05:33:58,157 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:33:58,157 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, 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 05:33:58,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 05:33:58,357 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:33:58,358 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:33:58,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:33:58,359 INFO L85 PathProgramCache]: Analyzing trace with hash -474084821, now seen corresponding path program 1 times [2024-11-14 05:33:58,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:33:58,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57854364] [2024-11-14 05:33:58,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:33:58,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:33:58,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:33:58,578 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 05:33:58,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:33:58,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57854364] [2024-11-14 05:33:58,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57854364] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:33:58,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604287799] [2024-11-14 05:33:58,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:33:58,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:33:58,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:33:58,584 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:33:58,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 05:33:58,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:33:58,783 INFO L255 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 05:33:58,790 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:33:58,859 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 05:33:58,859 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:33:58,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604287799] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:33:58,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:33:58,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 05:33:58,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102132206] [2024-11-14 05:33:58,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:33:58,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:33:58,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:33:58,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:33:58,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:33:58,861 INFO L87 Difference]: Start difference. First operand 3609 states and 6071 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:33:59,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:33:59,601 INFO L93 Difference]: Finished difference Result 7486 states and 11716 transitions. [2024-11-14 05:33:59,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:33:59,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2024-11-14 05:33:59,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:33:59,638 INFO L225 Difference]: With dead ends: 7486 [2024-11-14 05:33:59,638 INFO L226 Difference]: Without dead ends: 5523 [2024-11-14 05:33:59,647 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 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 05:33:59,650 INFO L432 NwaCegarLoop]: 3222 mSDtfsCounter, 3431 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3431 SdHoareTripleChecker+Valid, 3380 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 05:33:59,650 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3431 Valid, 3380 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 05:33:59,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5523 states. [2024-11-14 05:33:59,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5523 to 5505. [2024-11-14 05:33:59,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5505 states, 4827 states have (on average 1.6090739589807335) internal successors, (7767), 4845 states have internal predecessors, (7767), 484 states have call successors, (484), 192 states have call predecessors, (484), 192 states have return successors, (484), 468 states have call predecessors, (484), 484 states have call successors, (484) [2024-11-14 05:33:59,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5505 states to 5505 states and 8735 transitions. [2024-11-14 05:33:59,977 INFO L78 Accepts]: Start accepts. Automaton has 5505 states and 8735 transitions. Word has length 102 [2024-11-14 05:33:59,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:33:59,978 INFO L471 AbstractCegarLoop]: Abstraction has 5505 states and 8735 transitions. [2024-11-14 05:33:59,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:33:59,978 INFO L276 IsEmpty]: Start isEmpty. Operand 5505 states and 8735 transitions. [2024-11-14 05:33:59,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-14 05:33:59,990 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:33:59,991 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, 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 05:34:00,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-14 05:34:00,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:34:00,194 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:34:00,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:34:00,195 INFO L85 PathProgramCache]: Analyzing trace with hash 124232617, now seen corresponding path program 1 times [2024-11-14 05:34:00,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:34:00,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746223119] [2024-11-14 05:34:00,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:34:00,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:34:00,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:34:00,338 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-14 05:34:00,338 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:34:00,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746223119] [2024-11-14 05:34:00,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746223119] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:34:00,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:34:00,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 05:34:00,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993360336] [2024-11-14 05:34:00,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:34:00,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:34:00,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:34:00,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:34:00,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:34:00,341 INFO L87 Difference]: Start difference. First operand 5505 states and 8735 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-14 05:34:01,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:34:01,161 INFO L93 Difference]: Finished difference Result 8563 states and 13184 transitions. [2024-11-14 05:34:01,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:34:01,161 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 102 [2024-11-14 05:34:01,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:34:01,202 INFO L225 Difference]: With dead ends: 8563 [2024-11-14 05:34:01,202 INFO L226 Difference]: Without dead ends: 6593 [2024-11-14 05:34:01,211 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 05:34:01,212 INFO L432 NwaCegarLoop]: 3316 mSDtfsCounter, 89 mSDsluCounter, 3230 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 6546 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 05:34:01,212 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 6546 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 05:34:01,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6593 states. [2024-11-14 05:34:01,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6593 to 6273. [2024-11-14 05:34:01,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6273 states, 5563 states have (on average 1.6061477619989215) internal successors, (8935), 5581 states have internal predecessors, (8935), 500 states have call successors, (500), 208 states have call predecessors, (500), 208 states have return successors, (500), 484 states have call predecessors, (500), 500 states have call successors, (500) [2024-11-14 05:34:01,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6273 states to 6273 states and 9935 transitions. [2024-11-14 05:34:01,569 INFO L78 Accepts]: Start accepts. Automaton has 6273 states and 9935 transitions. Word has length 102 [2024-11-14 05:34:01,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:34:01,570 INFO L471 AbstractCegarLoop]: Abstraction has 6273 states and 9935 transitions. [2024-11-14 05:34:01,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-14 05:34:01,570 INFO L276 IsEmpty]: Start isEmpty. Operand 6273 states and 9935 transitions. [2024-11-14 05:34:01,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-14 05:34:01,587 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:34:01,587 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, 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 05:34:01,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-14 05:34:01,588 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:34:01,588 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:34:01,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1238427718, now seen corresponding path program 1 times [2024-11-14 05:34:01,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:34:01,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729478338] [2024-11-14 05:34:01,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:34:01,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:34:01,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:34:01,716 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-14 05:34:01,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:34:01,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729478338] [2024-11-14 05:34:01,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729478338] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:34:01,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:34:01,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 05:34:01,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415301133] [2024-11-14 05:34:01,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:34:01,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:34:01,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:34:01,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:34:01,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:34:01,720 INFO L87 Difference]: Start difference. First operand 6273 states and 9935 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 05:34:02,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:34:02,612 INFO L93 Difference]: Finished difference Result 15382 states and 23252 transitions. [2024-11-14 05:34:02,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:34:02,613 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 138 [2024-11-14 05:34:02,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:34:02,671 INFO L225 Difference]: With dead ends: 15382 [2024-11-14 05:34:02,671 INFO L226 Difference]: Without dead ends: 10755 [2024-11-14 05:34:02,691 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 05:34:02,692 INFO L432 NwaCegarLoop]: 3224 mSDtfsCounter, 3434 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3434 SdHoareTripleChecker+Valid, 3382 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:34:02,693 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3434 Valid, 3382 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 05:34:02,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10755 states. [2024-11-14 05:34:03,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10755 to 10705. [2024-11-14 05:34:03,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10705 states, 9323 states have (on average 1.5315885444599378) internal successors, (14279), 9357 states have internal predecessors, (14279), 964 states have call successors, (964), 416 states have call predecessors, (964), 416 states have return successors, (964), 932 states have call predecessors, (964), 964 states have call successors, (964) [2024-11-14 05:34:03,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10705 states to 10705 states and 16207 transitions. [2024-11-14 05:34:03,335 INFO L78 Accepts]: Start accepts. Automaton has 10705 states and 16207 transitions. Word has length 138 [2024-11-14 05:34:03,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:34:03,336 INFO L471 AbstractCegarLoop]: Abstraction has 10705 states and 16207 transitions. [2024-11-14 05:34:03,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 05:34:03,337 INFO L276 IsEmpty]: Start isEmpty. Operand 10705 states and 16207 transitions. [2024-11-14 05:34:03,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-14 05:34:03,368 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:34:03,368 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, 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 05:34:03,368 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-14 05:34:03,368 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:34:03,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:34:03,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1790781294, now seen corresponding path program 1 times [2024-11-14 05:34:03,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:34:03,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715853980] [2024-11-14 05:34:03,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:34:03,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:34:03,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:34:03,506 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-14 05:34:03,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:34:03,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715853980] [2024-11-14 05:34:03,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715853980] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:34:03,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:34:03,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 05:34:03,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712958980] [2024-11-14 05:34:03,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:34:03,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:34:03,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:34:03,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:34:03,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:34:03,508 INFO L87 Difference]: Start difference. First operand 10705 states and 16207 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 05:34:04,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:34:04,738 INFO L93 Difference]: Finished difference Result 28534 states and 42036 transitions. [2024-11-14 05:34:04,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:34:04,739 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 138 [2024-11-14 05:34:04,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:34:04,845 INFO L225 Difference]: With dead ends: 28534 [2024-11-14 05:34:04,845 INFO L226 Difference]: Without dead ends: 19475 [2024-11-14 05:34:04,883 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 05:34:04,884 INFO L432 NwaCegarLoop]: 3224 mSDtfsCounter, 3436 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3436 SdHoareTripleChecker+Valid, 3382 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:34:04,884 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3436 Valid, 3382 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 05:34:04,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19475 states. [2024-11-14 05:34:05,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19475 to 19377. [2024-11-14 05:34:05,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19377 states, 16683 states have (on average 1.4773721752682372) internal successors, (24647), 16749 states have internal predecessors, (24647), 1860 states have call successors, (1860), 832 states have call predecessors, (1860), 832 states have return successors, (1860), 1796 states have call predecessors, (1860), 1860 states have call successors, (1860) [2024-11-14 05:34:05,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19377 states to 19377 states and 28367 transitions. [2024-11-14 05:34:05,728 INFO L78 Accepts]: Start accepts. Automaton has 19377 states and 28367 transitions. Word has length 138 [2024-11-14 05:34:05,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:34:05,729 INFO L471 AbstractCegarLoop]: Abstraction has 19377 states and 28367 transitions. [2024-11-14 05:34:05,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 05:34:05,730 INFO L276 IsEmpty]: Start isEmpty. Operand 19377 states and 28367 transitions. [2024-11-14 05:34:05,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-14 05:34:05,779 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:34:05,779 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, 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 05:34:05,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-14 05:34:05,779 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:34:05,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:34:05,780 INFO L85 PathProgramCache]: Analyzing trace with hash 115662299, now seen corresponding path program 1 times [2024-11-14 05:34:05,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:34:05,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270731176] [2024-11-14 05:34:05,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:34:05,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:34:05,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:34:05,881 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-14 05:34:05,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:34:05,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270731176] [2024-11-14 05:34:05,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270731176] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:34:05,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:34:05,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 05:34:05,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935277128] [2024-11-14 05:34:05,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:34:05,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:34:05,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:34:05,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:34:05,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:34:05,883 INFO L87 Difference]: Start difference. First operand 19377 states and 28367 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 05:34:07,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:34:07,416 INFO L93 Difference]: Finished difference Result 54262 states and 78420 transitions. [2024-11-14 05:34:07,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:34:07,416 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 138 [2024-11-14 05:34:07,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:34:07,573 INFO L225 Difference]: With dead ends: 54262 [2024-11-14 05:34:07,573 INFO L226 Difference]: Without dead ends: 36531 [2024-11-14 05:34:07,620 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 05:34:07,622 INFO L432 NwaCegarLoop]: 3242 mSDtfsCounter, 3439 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3439 SdHoareTripleChecker+Valid, 3400 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:34:07,622 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3439 Valid, 3400 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 05:34:07,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36531 states. [2024-11-14 05:34:08,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36531 to 36337. [2024-11-14 05:34:08,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36337 states, 31083 states have (on average 1.439468519769649) internal successors, (44743), 31213 states have internal predecessors, (44743), 3588 states have call successors, (3588), 1664 states have call predecessors, (3588), 1664 states have return successors, (3588), 3460 states have call predecessors, (3588), 3588 states have call successors, (3588) [2024-11-14 05:34:09,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36337 states to 36337 states and 51919 transitions. [2024-11-14 05:34:09,207 INFO L78 Accepts]: Start accepts. Automaton has 36337 states and 51919 transitions. Word has length 138 [2024-11-14 05:34:09,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:34:09,207 INFO L471 AbstractCegarLoop]: Abstraction has 36337 states and 51919 transitions. [2024-11-14 05:34:09,208 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 05:34:09,208 INFO L276 IsEmpty]: Start isEmpty. Operand 36337 states and 51919 transitions. [2024-11-14 05:34:09,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2024-11-14 05:34:09,324 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:34:09,325 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:34:09,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-14 05:34:09,325 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:34:09,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:34:09,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1855582543, now seen corresponding path program 1 times [2024-11-14 05:34:09,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:34:09,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068479416] [2024-11-14 05:34:09,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:34:09,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:34:09,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:34:10,072 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 51 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-14 05:34:10,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:34:10,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068479416] [2024-11-14 05:34:10,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068479416] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:34:10,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687573987] [2024-11-14 05:34:10,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:34:10,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:34:10,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:34:10,075 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:34:10,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 05:34:10,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:34:10,274 INFO L255 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 05:34:10,280 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:34:10,322 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-14 05:34:10,323 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:34:10,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687573987] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:34:10,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:34:10,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-14 05:34:10,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971879492] [2024-11-14 05:34:10,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:34:10,324 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:34:10,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:34:10,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:34:10,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 05:34:10,325 INFO L87 Difference]: Start difference. First operand 36337 states and 51919 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-14 05:34:12,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:34:12,450 INFO L93 Difference]: Finished difference Result 67957 states and 97105 transitions. [2024-11-14 05:34:12,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:34:12,451 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 160 [2024-11-14 05:34:12,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:34:12,695 INFO L225 Difference]: With dead ends: 67957 [2024-11-14 05:34:12,695 INFO L226 Difference]: Without dead ends: 50323 [2024-11-14 05:34:12,747 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 168 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 05:34:12,748 INFO L432 NwaCegarLoop]: 3349 mSDtfsCounter, 132 mSDsluCounter, 3231 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 6580 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:34:12,750 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 6580 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 05:34:12,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50323 states. [2024-11-14 05:34:14,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50323 to 44369. [2024-11-14 05:34:14,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44369 states, 38731 states have (on average 1.460922775038083) internal successors, (56583), 38861 states have internal predecessors, (56583), 3780 states have call successors, (3780), 1856 states have call predecessors, (3780), 1856 states have return successors, (3780), 3652 states have call predecessors, (3780), 3780 states have call successors, (3780) [2024-11-14 05:34:14,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44369 states to 44369 states and 64143 transitions. [2024-11-14 05:34:14,856 INFO L78 Accepts]: Start accepts. Automaton has 44369 states and 64143 transitions. Word has length 160 [2024-11-14 05:34:14,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:34:14,857 INFO L471 AbstractCegarLoop]: Abstraction has 44369 states and 64143 transitions. [2024-11-14 05:34:14,857 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-14 05:34:14,857 INFO L276 IsEmpty]: Start isEmpty. Operand 44369 states and 64143 transitions. [2024-11-14 05:34:14,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2024-11-14 05:34:14,947 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:34:14,947 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:34:14,968 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 05:34:15,152 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:34:15,152 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:34:15,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:34:15,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1881817682, now seen corresponding path program 2 times [2024-11-14 05:34:15,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:34:15,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536817096] [2024-11-14 05:34:15,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:34:15,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:34:15,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:34:15,655 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 10 proven. 49 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-14 05:34:15,656 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:34:15,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536817096] [2024-11-14 05:34:15,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536817096] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:34:15,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485233824] [2024-11-14 05:34:15,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:34:15,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:34:15,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:34:15,658 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:34:15,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 05:34:15,876 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 05:34:15,876 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:34:15,880 INFO L255 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 05:34:15,887 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:34:16,291 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2024-11-14 05:34:16,291 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:34:16,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485233824] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:34:16,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:34:16,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2024-11-14 05:34:16,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603823312] [2024-11-14 05:34:16,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:34:16,293 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 05:34:16,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:34:16,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 05:34:16,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-14 05:34:16,294 INFO L87 Difference]: Start difference. First operand 44369 states and 64143 transitions. Second operand has 6 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-14 05:34:20,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:34:20,361 INFO L93 Difference]: Finished difference Result 74899 states and 108048 transitions. [2024-11-14 05:34:20,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 05:34:20,365 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 160 [2024-11-14 05:34:20,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:34:20,696 INFO L225 Difference]: With dead ends: 74899 [2024-11-14 05:34:20,696 INFO L226 Difference]: Without dead ends: 49233 [2024-11-14 05:34:20,750 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 159 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 05:34:20,750 INFO L432 NwaCegarLoop]: 3164 mSDtfsCounter, 3530 mSDsluCounter, 6281 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3542 SdHoareTripleChecker+Valid, 9445 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-14 05:34:20,751 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3542 Valid, 9445 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 997 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-14 05:34:20,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49233 states. [2024-11-14 05:34:22,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49233 to 48657. [2024-11-14 05:34:22,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48657 states, 42635 states have (on average 1.441233728157617) internal successors, (61447), 42765 states have internal predecessors, (61447), 3908 states have call successors, (3908), 2112 states have call predecessors, (3908), 2112 states have return successors, (3908), 3780 states have call predecessors, (3908), 3908 states have call successors, (3908) [2024-11-14 05:34:22,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48657 states to 48657 states and 69263 transitions. [2024-11-14 05:34:22,581 INFO L78 Accepts]: Start accepts. Automaton has 48657 states and 69263 transitions. Word has length 160 [2024-11-14 05:34:22,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:34:22,582 INFO L471 AbstractCegarLoop]: Abstraction has 48657 states and 69263 transitions. [2024-11-14 05:34:22,582 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-14 05:34:22,582 INFO L276 IsEmpty]: Start isEmpty. Operand 48657 states and 69263 transitions. [2024-11-14 05:34:22,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2024-11-14 05:34:22,687 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:34:22,687 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, 3, 3, 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] [2024-11-14 05:34:22,872 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 05:34:22,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:34:22,892 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:34:22,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:34:22,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1613247410, now seen corresponding path program 1 times [2024-11-14 05:34:22,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:34:22,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65452499] [2024-11-14 05:34:22,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:34:22,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:34:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:34:23,181 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-14 05:34:23,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:34:23,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65452499] [2024-11-14 05:34:23,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65452499] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:34:23,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929728293] [2024-11-14 05:34:23,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:34:23,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:34:23,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:34:23,186 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:34:23,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 05:34:23,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:34:23,391 INFO L255 TraceCheckSpWp]: Trace formula consists of 785 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:34:23,394 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:34:23,445 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-14 05:34:23,445 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:34:23,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929728293] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:34:23,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:34:23,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-14 05:34:23,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099088255] [2024-11-14 05:34:23,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:34:23,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:34:23,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:34:23,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:34:23,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 05:34:23,447 INFO L87 Difference]: Start difference. First operand 48657 states and 69263 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-14 05:34:26,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:34:26,103 INFO L93 Difference]: Finished difference Result 72805 states and 104529 transitions. [2024-11-14 05:34:26,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:34:26,104 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 160 [2024-11-14 05:34:26,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:34:26,286 INFO L225 Difference]: With dead ends: 72805 [2024-11-14 05:34:26,286 INFO L226 Difference]: Without dead ends: 48787 [2024-11-14 05:34:26,366 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 162 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 05:34:26,366 INFO L432 NwaCegarLoop]: 3356 mSDtfsCounter, 162 mSDsluCounter, 3216 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 6572 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:34:26,367 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 6572 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 05:34:26,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48787 states. [2024-11-14 05:34:27,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48787 to 48337. [2024-11-14 05:34:27,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48337 states, 42315 states have (on average 1.42642089093702) internal successors, (60359), 42445 states have internal predecessors, (60359), 3908 states have call successors, (3908), 2112 states have call predecessors, (3908), 2112 states have return successors, (3908), 3780 states have call predecessors, (3908), 3908 states have call successors, (3908) [2024-11-14 05:34:28,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48337 states to 48337 states and 68175 transitions. [2024-11-14 05:34:28,159 INFO L78 Accepts]: Start accepts. Automaton has 48337 states and 68175 transitions. Word has length 160 [2024-11-14 05:34:28,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:34:28,160 INFO L471 AbstractCegarLoop]: Abstraction has 48337 states and 68175 transitions. [2024-11-14 05:34:28,160 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-14 05:34:28,160 INFO L276 IsEmpty]: Start isEmpty. Operand 48337 states and 68175 transitions. [2024-11-14 05:34:28,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2024-11-14 05:34:28,247 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:34:28,247 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:34:28,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 05:34:28,448 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:34:28,448 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:34:28,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:34:28,448 INFO L85 PathProgramCache]: Analyzing trace with hash 260037202, now seen corresponding path program 1 times [2024-11-14 05:34:28,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:34:28,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418334512] [2024-11-14 05:34:28,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:34:28,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:34:28,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:34:28,862 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 10 proven. 49 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-14 05:34:28,862 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:34:28,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418334512] [2024-11-14 05:34:28,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418334512] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:34:28,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678673965] [2024-11-14 05:34:28,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:34:28,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:34:28,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:34:28,865 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:34:28,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 05:34:29,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:34:29,063 INFO L255 TraceCheckSpWp]: Trace formula consists of 791 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 05:34:29,066 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:34:29,105 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-14 05:34:29,106 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:34:29,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678673965] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:34:29,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:34:29,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-14 05:34:29,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723719047] [2024-11-14 05:34:29,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:34:29,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:34:29,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:34:29,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:34:29,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 05:34:29,108 INFO L87 Difference]: Start difference. First operand 48337 states and 68175 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-14 05:34:31,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:34:31,709 INFO L93 Difference]: Finished difference Result 80311 states and 111780 transitions. [2024-11-14 05:34:31,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:34:31,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 160 [2024-11-14 05:34:31,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:34:31,891 INFO L225 Difference]: With dead ends: 80311 [2024-11-14 05:34:31,891 INFO L226 Difference]: Without dead ends: 56773 [2024-11-14 05:34:31,947 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 162 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 05:34:31,948 INFO L432 NwaCegarLoop]: 3246 mSDtfsCounter, 3442 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3442 SdHoareTripleChecker+Valid, 3289 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:34:31,949 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3442 Valid, 3289 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 05:34:31,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56773 states. [2024-11-14 05:34:33,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56773 to 56773. [2024-11-14 05:34:33,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56773 states, 49991 states have (on average 1.3903902702486448) internal successors, (69507), 50121 states have internal predecessors, (69507), 4160 states have call successors, (4160), 2620 states have call predecessors, (4160), 2620 states have return successors, (4160), 4032 states have call predecessors, (4160), 4160 states have call successors, (4160) [2024-11-14 05:34:34,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56773 states to 56773 states and 77827 transitions. [2024-11-14 05:34:34,073 INFO L78 Accepts]: Start accepts. Automaton has 56773 states and 77827 transitions. Word has length 160 [2024-11-14 05:34:34,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:34:34,074 INFO L471 AbstractCegarLoop]: Abstraction has 56773 states and 77827 transitions. [2024-11-14 05:34:34,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-14 05:34:34,074 INFO L276 IsEmpty]: Start isEmpty. Operand 56773 states and 77827 transitions. [2024-11-14 05:34:34,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2024-11-14 05:34:34,229 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:34:34,230 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, 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 05:34:34,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 05:34:34,430 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:34:34,430 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:34:34,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:34:34,431 INFO L85 PathProgramCache]: Analyzing trace with hash 21078566, now seen corresponding path program 1 times [2024-11-14 05:34:34,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:34:34,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985249745] [2024-11-14 05:34:34,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:34:34,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:34:34,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:34:35,218 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 12 proven. 50 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-14 05:34:35,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:34:35,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985249745] [2024-11-14 05:34:35,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985249745] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:34:35,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550545015] [2024-11-14 05:34:35,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:34:35,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:34:35,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:34:35,221 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:34:35,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e6bb60a-4116-4d51-9748-eb722b7f7952/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 05:34:35,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:34:35,450 INFO L255 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-14 05:34:35,454 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:34:35,850 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 72 proven. 32 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 05:34:35,850 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:34:36,399 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 59 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-14 05:34:36,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550545015] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:34:36,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [522360302] [2024-11-14 05:34:36,434 INFO L159 IcfgInterpreter]: Started Sifa with 82 locations of interest [2024-11-14 05:34:36,434 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:34:36,438 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:34:36,443 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:34:36,443 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs