./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.06.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/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_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.06.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/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_561d7d87-e69c-45d5-8b1a-f1b206648610/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 4ff0d99c6257365cafb7459615c8e1194d53bcc0d71dc100705abd4bb2d65c37 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 03:50:03,518 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 03:50:03,623 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 03:50:03,629 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 03:50:03,630 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 03:50:03,671 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 03:50:03,673 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 03:50:03,673 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 03:50:03,674 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 03:50:03,674 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 03:50:03,675 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 03:50:03,675 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 03:50:03,675 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 03:50:03,675 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 03:50:03,675 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 03:50:03,675 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 03:50:03,677 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 03:50:03,677 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 03:50:03,677 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 03:50:03,677 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 03:50:03,677 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 03:50:03,677 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 03:50:03,678 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 03:50:03,678 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 03:50:03,678 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 03:50:03,678 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 03:50:03,678 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 03:50:03,678 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 03:50:03,678 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 03:50:03,678 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 03:50:03,678 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 03:50:03,679 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 03:50:03,679 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 03:50:03,679 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 03:50:03,679 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 03:50:03,679 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 03:50:03,679 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 03:50:03,679 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 03:50:03,679 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:50:03,679 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 03:50:03,679 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 03:50:03,679 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 03:50:03,680 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 03:50:03,680 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 03:50:03,680 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 03:50:03,680 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 03:50:03,681 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 03:50:03,681 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_561d7d87-e69c-45d5-8b1a-f1b206648610/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 -> 4ff0d99c6257365cafb7459615c8e1194d53bcc0d71dc100705abd4bb2d65c37 [2024-11-14 03:50:03,987 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 03:50:03,998 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 03:50:04,002 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 03:50:04,005 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 03:50:04,006 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 03:50:04,007 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/systemc/token_ring.06.cil-1.c Unable to find full path for "g++" [2024-11-14 03:50:06,185 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 03:50:06,479 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 03:50:06,480 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/sv-benchmarks/c/systemc/token_ring.06.cil-1.c [2024-11-14 03:50:06,493 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/data/a86d40fbc/b07eeabb03364d8f837f7f33849c672d/FLAGd2a639d02 [2024-11-14 03:50:06,767 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/data/a86d40fbc/b07eeabb03364d8f837f7f33849c672d [2024-11-14 03:50:06,770 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 03:50:06,772 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 03:50:06,773 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 03:50:06,774 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 03:50:06,781 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 03:50:06,782 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:50:06" (1/1) ... [2024-11-14 03:50:06,782 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1447a15f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:50:06, skipping insertion in model container [2024-11-14 03:50:06,783 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:50:06" (1/1) ... [2024-11-14 03:50:06,816 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 03:50:06,973 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_561d7d87-e69c-45d5-8b1a-f1b206648610/sv-benchmarks/c/systemc/token_ring.06.cil-1.c[671,684] [2024-11-14 03:50:07,081 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:50:07,094 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 03:50:07,104 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_561d7d87-e69c-45d5-8b1a-f1b206648610/sv-benchmarks/c/systemc/token_ring.06.cil-1.c[671,684] [2024-11-14 03:50:07,167 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:50:07,197 INFO L204 MainTranslator]: Completed translation [2024-11-14 03:50:07,197 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:50:07 WrapperNode [2024-11-14 03:50:07,198 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 03:50:07,199 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 03:50:07,199 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 03:50:07,202 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 03:50:07,210 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:50:07" (1/1) ... [2024-11-14 03:50:07,220 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:50:07" (1/1) ... [2024-11-14 03:50:07,260 INFO L138 Inliner]: procedures = 40, calls = 50, calls flagged for inlining = 23, calls inlined = 23, statements flattened = 516 [2024-11-14 03:50:07,261 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 03:50:07,262 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 03:50:07,262 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 03:50:07,262 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 03:50:07,269 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:50:07" (1/1) ... [2024-11-14 03:50:07,269 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:50:07" (1/1) ... [2024-11-14 03:50:07,272 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:50:07" (1/1) ... [2024-11-14 03:50:07,273 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:50:07" (1/1) ... [2024-11-14 03:50:07,283 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:50:07" (1/1) ... [2024-11-14 03:50:07,307 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:50:07" (1/1) ... [2024-11-14 03:50:07,311 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:50:07" (1/1) ... [2024-11-14 03:50:07,313 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:50:07" (1/1) ... [2024-11-14 03:50:07,317 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 03:50:07,319 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 03:50:07,319 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 03:50:07,319 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 03:50:07,320 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:50:07" (1/1) ... [2024-11-14 03:50:07,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:50:07,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:50:07,366 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 03:50:07,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 03:50:07,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 03:50:07,404 INFO L130 BoogieDeclarations]: Found specification of procedure error [2024-11-14 03:50:07,404 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2024-11-14 03:50:07,405 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2024-11-14 03:50:07,405 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2024-11-14 03:50:07,405 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2024-11-14 03:50:07,406 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2024-11-14 03:50:07,406 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-14 03:50:07,406 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-14 03:50:07,406 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2024-11-14 03:50:07,406 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2024-11-14 03:50:07,406 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2024-11-14 03:50:07,406 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2024-11-14 03:50:07,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 03:50:07,407 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2024-11-14 03:50:07,407 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2024-11-14 03:50:07,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 03:50:07,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 03:50:07,539 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 03:50:07,541 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 03:50:08,450 INFO L? ?]: Removed 65 outVars from TransFormulas that were not future-live. [2024-11-14 03:50:08,450 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 03:50:08,878 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 03:50:08,879 INFO L316 CfgBuilder]: Removed 9 assume(true) statements. [2024-11-14 03:50:08,879 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:50:08 BoogieIcfgContainer [2024-11-14 03:50:08,879 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 03:50:08,883 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 03:50:08,884 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 03:50:08,890 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 03:50:08,890 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 03:50:06" (1/3) ... [2024-11-14 03:50:08,891 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a50866c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:50:08, skipping insertion in model container [2024-11-14 03:50:08,892 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:50:07" (2/3) ... [2024-11-14 03:50:08,892 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a50866c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:50:08, skipping insertion in model container [2024-11-14 03:50:08,892 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:50:08" (3/3) ... [2024-11-14 03:50:08,895 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.06.cil-1.c [2024-11-14 03:50:08,912 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 03:50:08,915 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG token_ring.06.cil-1.c that has 8 procedures, 135 locations, 1 initial locations, 9 loop locations, and 1 error locations. [2024-11-14 03:50:08,988 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 03:50:09,000 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;@7e7fb523, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 03:50:09,001 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 03:50:09,005 INFO L276 IsEmpty]: Start isEmpty. Operand has 135 states, 104 states have (on average 1.5096153846153846) internal successors, (157), 108 states have internal predecessors, (157), 22 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2024-11-14 03:50:09,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-14 03:50:09,015 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:50:09,015 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] [2024-11-14 03:50:09,016 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:50:09,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:50:09,020 INFO L85 PathProgramCache]: Analyzing trace with hash 629979228, now seen corresponding path program 1 times [2024-11-14 03:50:09,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:50:09,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103584967] [2024-11-14 03:50:09,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:50:09,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:50:09,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:50:09,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:50:09,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:50:09,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103584967] [2024-11-14 03:50:09,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103584967] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:50:09,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:50:09,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 03:50:09,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530687351] [2024-11-14 03:50:09,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:50:09,626 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:50:09,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:50:09,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:50:09,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:50:09,656 INFO L87 Difference]: Start difference. First operand has 135 states, 104 states have (on average 1.5096153846153846) internal successors, (157), 108 states have internal predecessors, (157), 22 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 03:50:10,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:50:10,256 INFO L93 Difference]: Finished difference Result 381 states and 587 transitions. [2024-11-14 03:50:10,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:50:10,259 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 49 [2024-11-14 03:50:10,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:50:10,272 INFO L225 Difference]: With dead ends: 381 [2024-11-14 03:50:10,272 INFO L226 Difference]: Without dead ends: 247 [2024-11-14 03:50:10,279 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:50:10,284 INFO L432 NwaCegarLoop]: 295 mSDtfsCounter, 332 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:50:10,285 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 514 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 03:50:10,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2024-11-14 03:50:10,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 246. [2024-11-14 03:50:10,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 195 states have (on average 1.435897435897436) internal successors, (280), 198 states have internal predecessors, (280), 38 states have call successors, (38), 13 states have call predecessors, (38), 12 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2024-11-14 03:50:10,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 354 transitions. [2024-11-14 03:50:10,359 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 354 transitions. Word has length 49 [2024-11-14 03:50:10,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:50:10,359 INFO L471 AbstractCegarLoop]: Abstraction has 246 states and 354 transitions. [2024-11-14 03:50:10,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 03:50:10,360 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 354 transitions. [2024-11-14 03:50:10,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-14 03:50:10,364 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:50:10,365 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:50:10,365 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 03:50:10,365 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:50:10,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:50:10,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1623842996, now seen corresponding path program 1 times [2024-11-14 03:50:10,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:50:10,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925414212] [2024-11-14 03:50:10,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:50:10,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:50:10,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:50:10,707 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:50:10,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:50:10,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925414212] [2024-11-14 03:50:10,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925414212] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:50:10,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612444740] [2024-11-14 03:50:10,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:50:10,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:50:10,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:50:10,715 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:50:10,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 03:50:10,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:50:10,957 INFO L255 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:50:10,968 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:50:11,079 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 03:50:11,079 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:50:11,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612444740] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:50:11,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:50:11,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:50:11,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027669424] [2024-11-14 03:50:11,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:50:11,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:50:11,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:50:11,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:50:11,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:50:11,083 INFO L87 Difference]: Start difference. First operand 246 states and 354 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:50:11,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:50:11,296 INFO L93 Difference]: Finished difference Result 721 states and 1053 transitions. [2024-11-14 03:50:11,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:50:11,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 95 [2024-11-14 03:50:11,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:50:11,305 INFO L225 Difference]: With dead ends: 721 [2024-11-14 03:50:11,305 INFO L226 Difference]: Without dead ends: 480 [2024-11-14 03:50:11,311 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:50:11,312 INFO L432 NwaCegarLoop]: 206 mSDtfsCounter, 168 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:50:11,312 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 355 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:50:11,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2024-11-14 03:50:11,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 474. [2024-11-14 03:50:11,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 381 states have (on average 1.4304461942257218) internal successors, (545), 385 states have internal predecessors, (545), 68 states have call successors, (68), 25 states have call predecessors, (68), 24 states have return successors, (66), 64 states have call predecessors, (66), 66 states have call successors, (66) [2024-11-14 03:50:11,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 679 transitions. [2024-11-14 03:50:11,401 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 679 transitions. Word has length 95 [2024-11-14 03:50:11,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:50:11,402 INFO L471 AbstractCegarLoop]: Abstraction has 474 states and 679 transitions. [2024-11-14 03:50:11,402 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:50:11,402 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 679 transitions. [2024-11-14 03:50:11,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-14 03:50:11,415 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:50:11,415 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:50:11,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 03:50:11,616 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2024-11-14 03:50:11,617 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:50:11,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:50:11,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1086806996, now seen corresponding path program 1 times [2024-11-14 03:50:11,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:50:11,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142721050] [2024-11-14 03:50:11,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:50:11,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:50:11,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:50:11,847 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:50:11,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:50:11,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142721050] [2024-11-14 03:50:11,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142721050] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:50:11,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102422114] [2024-11-14 03:50:11,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:50:11,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:50:11,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:50:11,852 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:50:11,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 03:50:12,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:50:12,105 INFO L255 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:50:12,109 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:50:12,185 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 03:50:12,189 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:50:12,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102422114] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:50:12,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:50:12,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:50:12,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385335806] [2024-11-14 03:50:12,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:50:12,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:50:12,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:50:12,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:50:12,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:50:12,192 INFO L87 Difference]: Start difference. First operand 474 states and 679 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:50:12,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:50:12,443 INFO L93 Difference]: Finished difference Result 1399 states and 2034 transitions. [2024-11-14 03:50:12,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:50:12,444 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 95 [2024-11-14 03:50:12,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:50:12,458 INFO L225 Difference]: With dead ends: 1399 [2024-11-14 03:50:12,458 INFO L226 Difference]: Without dead ends: 930 [2024-11-14 03:50:12,460 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:50:12,461 INFO L432 NwaCegarLoop]: 158 mSDtfsCounter, 165 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:50:12,461 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 307 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:50:12,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2024-11-14 03:50:12,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 922. [2024-11-14 03:50:12,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 747 states have (on average 1.4230254350736278) internal successors, (1063), 753 states have internal predecessors, (1063), 126 states have call successors, (126), 49 states have call predecessors, (126), 48 states have return successors, (124), 120 states have call predecessors, (124), 124 states have call successors, (124) [2024-11-14 03:50:12,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1313 transitions. [2024-11-14 03:50:12,579 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1313 transitions. Word has length 95 [2024-11-14 03:50:12,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:50:12,580 INFO L471 AbstractCegarLoop]: Abstraction has 922 states and 1313 transitions. [2024-11-14 03:50:12,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:50:12,580 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1313 transitions. [2024-11-14 03:50:12,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-14 03:50:12,587 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:50:12,588 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:50:12,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 03:50:12,788 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-14 03:50:12,788 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:50:12,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:50:12,789 INFO L85 PathProgramCache]: Analyzing trace with hash -2003782476, now seen corresponding path program 1 times [2024-11-14 03:50:12,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:50:12,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239366274] [2024-11-14 03:50:12,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:50:12,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:50:12,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:50:13,023 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:50:13,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:50:13,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239366274] [2024-11-14 03:50:13,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239366274] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:50:13,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358888919] [2024-11-14 03:50:13,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:50:13,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:50:13,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:50:13,031 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:50:13,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 03:50:13,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:50:13,241 INFO L255 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:50:13,250 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:50:13,336 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 03:50:13,337 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:50:13,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358888919] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:50:13,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:50:13,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:50:13,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364037953] [2024-11-14 03:50:13,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:50:13,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:50:13,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:50:13,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:50:13,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:50:13,343 INFO L87 Difference]: Start difference. First operand 922 states and 1313 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:50:13,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:50:13,604 INFO L93 Difference]: Finished difference Result 2731 states and 3946 transitions. [2024-11-14 03:50:13,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:50:13,605 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 95 [2024-11-14 03:50:13,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:50:13,617 INFO L225 Difference]: With dead ends: 2731 [2024-11-14 03:50:13,617 INFO L226 Difference]: Without dead ends: 1814 [2024-11-14 03:50:13,621 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:50:13,622 INFO L432 NwaCegarLoop]: 158 mSDtfsCounter, 159 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:50:13,622 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 307 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:50:13,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1814 states. [2024-11-14 03:50:13,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1814 to 1802. [2024-11-14 03:50:13,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1802 states, 1467 states have (on average 1.414451261077028) internal successors, (2075), 1477 states have internal predecessors, (2075), 238 states have call successors, (238), 97 states have call predecessors, (238), 96 states have return successors, (236), 228 states have call predecessors, (236), 236 states have call successors, (236) [2024-11-14 03:50:13,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 2549 transitions. [2024-11-14 03:50:13,791 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 2549 transitions. Word has length 95 [2024-11-14 03:50:13,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:50:13,792 INFO L471 AbstractCegarLoop]: Abstraction has 1802 states and 2549 transitions. [2024-11-14 03:50:13,792 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:50:13,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 2549 transitions. [2024-11-14 03:50:13,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-14 03:50:13,797 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:50:13,798 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:50:13,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 03:50:13,998 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:50:13,998 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:50:13,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:50:13,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1426470292, now seen corresponding path program 1 times [2024-11-14 03:50:13,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:50:13,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353514497] [2024-11-14 03:50:13,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:50:13,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:50:14,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:50:14,173 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-14 03:50:14,173 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:50:14,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353514497] [2024-11-14 03:50:14,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353514497] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:50:14,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:50:14,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:50:14,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001002997] [2024-11-14 03:50:14,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:50:14,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:50:14,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:50:14,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:50:14,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:50:14,179 INFO L87 Difference]: Start difference. First operand 1802 states and 2549 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-14 03:50:14,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:50:14,408 INFO L93 Difference]: Finished difference Result 3230 states and 4624 transitions. [2024-11-14 03:50:14,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:50:14,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 95 [2024-11-14 03:50:14,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:50:14,432 INFO L225 Difference]: With dead ends: 3230 [2024-11-14 03:50:14,432 INFO L226 Difference]: Without dead ends: 2298 [2024-11-14 03:50:14,435 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:50:14,436 INFO L432 NwaCegarLoop]: 242 mSDtfsCounter, 79 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:50:14,437 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 407 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:50:14,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2024-11-14 03:50:14,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 2142. [2024-11-14 03:50:14,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2142 states, 1791 states have (on average 1.4444444444444444) internal successors, (2587), 1801 states have internal predecessors, (2587), 246 states have call successors, (246), 105 states have call predecessors, (246), 104 states have return successors, (244), 236 states have call predecessors, (244), 244 states have call successors, (244) [2024-11-14 03:50:14,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 3077 transitions. [2024-11-14 03:50:14,590 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 3077 transitions. Word has length 95 [2024-11-14 03:50:14,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:50:14,593 INFO L471 AbstractCegarLoop]: Abstraction has 2142 states and 3077 transitions. [2024-11-14 03:50:14,593 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-14 03:50:14,594 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 3077 transitions. [2024-11-14 03:50:14,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-11-14 03:50:14,605 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:50:14,605 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:50:14,606 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 03:50:14,606 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:50:14,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:50:14,606 INFO L85 PathProgramCache]: Analyzing trace with hash 473779918, now seen corresponding path program 1 times [2024-11-14 03:50:14,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:50:14,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503049899] [2024-11-14 03:50:14,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:50:14,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:50:14,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:50:14,770 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-14 03:50:14,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:50:14,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503049899] [2024-11-14 03:50:14,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503049899] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:50:14,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:50:14,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:50:14,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411881893] [2024-11-14 03:50:14,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:50:14,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:50:14,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:50:14,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:50:14,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:50:14,774 INFO L87 Difference]: Start difference. First operand 2142 states and 3077 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 03:50:15,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:50:15,158 INFO L93 Difference]: Finished difference Result 6343 states and 9206 transitions. [2024-11-14 03:50:15,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:50:15,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 128 [2024-11-14 03:50:15,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:50:15,187 INFO L225 Difference]: With dead ends: 6343 [2024-11-14 03:50:15,187 INFO L226 Difference]: Without dead ends: 4206 [2024-11-14 03:50:15,193 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:50:15,196 INFO L432 NwaCegarLoop]: 160 mSDtfsCounter, 156 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:50:15,196 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 309 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:50:15,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4206 states. [2024-11-14 03:50:15,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4206 to 4178. [2024-11-14 03:50:15,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4178 states, 3499 states have (on average 1.4321234638468134) internal successors, (5011), 3517 states have internal predecessors, (5011), 470 states have call successors, (470), 209 states have call predecessors, (470), 208 states have return successors, (468), 452 states have call predecessors, (468), 468 states have call successors, (468) [2024-11-14 03:50:15,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4178 states to 4178 states and 5949 transitions. [2024-11-14 03:50:15,490 INFO L78 Accepts]: Start accepts. Automaton has 4178 states and 5949 transitions. Word has length 128 [2024-11-14 03:50:15,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:50:15,491 INFO L471 AbstractCegarLoop]: Abstraction has 4178 states and 5949 transitions. [2024-11-14 03:50:15,491 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 03:50:15,491 INFO L276 IsEmpty]: Start isEmpty. Operand 4178 states and 5949 transitions. [2024-11-14 03:50:15,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-11-14 03:50:15,508 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:50:15,508 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:50:15,509 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-14 03:50:15,509 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:50:15,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:50:15,510 INFO L85 PathProgramCache]: Analyzing trace with hash 851668276, now seen corresponding path program 1 times [2024-11-14 03:50:15,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:50:15,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296056725] [2024-11-14 03:50:15,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:50:15,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:50:15,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:50:15,646 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-14 03:50:15,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:50:15,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296056725] [2024-11-14 03:50:15,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296056725] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:50:15,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:50:15,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:50:15,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384195751] [2024-11-14 03:50:15,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:50:15,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:50:15,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:50:15,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:50:15,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:50:15,651 INFO L87 Difference]: Start difference. First operand 4178 states and 5949 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 03:50:16,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:50:16,163 INFO L93 Difference]: Finished difference Result 12379 states and 17798 transitions. [2024-11-14 03:50:16,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:50:16,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 128 [2024-11-14 03:50:16,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:50:16,216 INFO L225 Difference]: With dead ends: 12379 [2024-11-14 03:50:16,217 INFO L226 Difference]: Without dead ends: 8206 [2024-11-14 03:50:16,231 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:50:16,232 INFO L432 NwaCegarLoop]: 160 mSDtfsCounter, 158 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:50:16,233 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 309 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:50:16,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8206 states. [2024-11-14 03:50:16,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8206 to 8154. [2024-11-14 03:50:16,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8154 states, 6835 states have (on average 1.4190197512801757) internal successors, (9699), 6869 states have internal predecessors, (9699), 902 states have call successors, (902), 417 states have call predecessors, (902), 416 states have return successors, (900), 868 states have call predecessors, (900), 900 states have call successors, (900) [2024-11-14 03:50:16,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8154 states to 8154 states and 11501 transitions. [2024-11-14 03:50:16,801 INFO L78 Accepts]: Start accepts. Automaton has 8154 states and 11501 transitions. Word has length 128 [2024-11-14 03:50:16,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:50:16,802 INFO L471 AbstractCegarLoop]: Abstraction has 8154 states and 11501 transitions. [2024-11-14 03:50:16,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 03:50:16,803 INFO L276 IsEmpty]: Start isEmpty. Operand 8154 states and 11501 transitions. [2024-11-14 03:50:16,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-11-14 03:50:16,823 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:50:16,824 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:50:16,824 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-14 03:50:16,824 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:50:16,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:50:16,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1174328290, now seen corresponding path program 1 times [2024-11-14 03:50:16,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:50:16,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541050164] [2024-11-14 03:50:16,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:50:16,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:50:16,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:50:16,960 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-14 03:50:16,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:50:16,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541050164] [2024-11-14 03:50:16,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541050164] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:50:16,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:50:16,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:50:16,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338304857] [2024-11-14 03:50:16,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:50:16,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:50:16,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:50:16,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:50:16,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:50:16,966 INFO L87 Difference]: Start difference. First operand 8154 states and 11501 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 03:50:18,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:50:18,063 INFO L93 Difference]: Finished difference Result 24163 states and 34390 transitions. [2024-11-14 03:50:18,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:50:18,064 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 128 [2024-11-14 03:50:18,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:50:18,171 INFO L225 Difference]: With dead ends: 24163 [2024-11-14 03:50:18,171 INFO L226 Difference]: Without dead ends: 16014 [2024-11-14 03:50:18,198 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:50:18,199 INFO L432 NwaCegarLoop]: 185 mSDtfsCounter, 161 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:50:18,199 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 334 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:50:18,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16014 states. [2024-11-14 03:50:18,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16014 to 15914. [2024-11-14 03:50:18,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15914 states, 13347 states have (on average 1.4051846856971604) internal successors, (18755), 13413 states have internal predecessors, (18755), 1734 states have call successors, (1734), 833 states have call predecessors, (1734), 832 states have return successors, (1732), 1668 states have call predecessors, (1732), 1732 states have call successors, (1732) [2024-11-14 03:50:19,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15914 states to 15914 states and 22221 transitions. [2024-11-14 03:50:19,080 INFO L78 Accepts]: Start accepts. Automaton has 15914 states and 22221 transitions. Word has length 128 [2024-11-14 03:50:19,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:50:19,080 INFO L471 AbstractCegarLoop]: Abstraction has 15914 states and 22221 transitions. [2024-11-14 03:50:19,081 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 03:50:19,081 INFO L276 IsEmpty]: Start isEmpty. Operand 15914 states and 22221 transitions. [2024-11-14 03:50:19,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2024-11-14 03:50:19,142 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:50:19,143 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:50:19,143 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-14 03:50:19,143 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:50:19,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:50:19,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1997325338, now seen corresponding path program 1 times [2024-11-14 03:50:19,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:50:19,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765206791] [2024-11-14 03:50:19,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:50:19,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:50:19,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:50:19,612 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-14 03:50:19,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:50:19,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765206791] [2024-11-14 03:50:19,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765206791] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:50:19,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181739794] [2024-11-14 03:50:19,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:50:19,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:50:19,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:50:19,615 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:50:19,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 03:50:19,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:50:19,820 INFO L255 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 03:50:19,824 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:50:19,905 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-14 03:50:19,906 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:50:19,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181739794] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:50:19,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:50:19,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-14 03:50:19,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145922254] [2024-11-14 03:50:19,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:50:19,908 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:50:19,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:50:19,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:50:19,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:50:19,909 INFO L87 Difference]: Start difference. First operand 15914 states and 22221 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-14 03:50:20,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:50:20,843 INFO L93 Difference]: Finished difference Result 24130 states and 34259 transitions. [2024-11-14 03:50:20,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:50:20,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 149 [2024-11-14 03:50:20,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:50:20,932 INFO L225 Difference]: With dead ends: 24130 [2024-11-14 03:50:20,932 INFO L226 Difference]: Without dead ends: 15982 [2024-11-14 03:50:20,966 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:50:20,967 INFO L432 NwaCegarLoop]: 278 mSDtfsCounter, 152 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:50:20,967 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 430 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:50:20,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15982 states. [2024-11-14 03:50:21,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15982 to 15850. [2024-11-14 03:50:21,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15850 states, 13283 states have (on average 1.3878641873070843) internal successors, (18435), 13349 states have internal predecessors, (18435), 1734 states have call successors, (1734), 833 states have call predecessors, (1734), 832 states have return successors, (1732), 1668 states have call predecessors, (1732), 1732 states have call successors, (1732) [2024-11-14 03:50:22,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15850 states to 15850 states and 21901 transitions. [2024-11-14 03:50:22,077 INFO L78 Accepts]: Start accepts. Automaton has 15850 states and 21901 transitions. Word has length 149 [2024-11-14 03:50:22,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:50:22,077 INFO L471 AbstractCegarLoop]: Abstraction has 15850 states and 21901 transitions. [2024-11-14 03:50:22,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-14 03:50:22,079 INFO L276 IsEmpty]: Start isEmpty. Operand 15850 states and 21901 transitions. [2024-11-14 03:50:22,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2024-11-14 03:50:22,138 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:50:22,138 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:50:22,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-14 03:50:22,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:50:22,339 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:50:22,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:50:22,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1093264134, now seen corresponding path program 1 times [2024-11-14 03:50:22,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:50:22,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902143801] [2024-11-14 03:50:22,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:50:22,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:50:22,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:50:22,690 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 10 proven. 43 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-14 03:50:22,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:50:22,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902143801] [2024-11-14 03:50:22,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902143801] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:50:22,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748554810] [2024-11-14 03:50:22,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:50:22,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:50:22,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:50:22,694 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:50:22,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 03:50:22,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:50:22,938 INFO L255 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:50:22,943 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:50:23,009 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-14 03:50:23,009 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:50:23,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748554810] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:50:23,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:50:23,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-14 03:50:23,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514289350] [2024-11-14 03:50:23,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:50:23,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:50:23,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:50:23,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:50:23,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:50:23,014 INFO L87 Difference]: Start difference. First operand 15850 states and 21901 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-14 03:50:23,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:50:23,815 INFO L93 Difference]: Finished difference Result 27672 states and 37866 transitions. [2024-11-14 03:50:23,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:50:23,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 149 [2024-11-14 03:50:23,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:50:23,918 INFO L225 Difference]: With dead ends: 27672 [2024-11-14 03:50:23,918 INFO L226 Difference]: Without dead ends: 19620 [2024-11-14 03:50:23,951 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:50:23,952 INFO L432 NwaCegarLoop]: 180 mSDtfsCounter, 164 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:50:23,953 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 219 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:50:23,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19620 states. [2024-11-14 03:50:24,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19620 to 19620. [2024-11-14 03:50:24,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19620 states, 16673 states have (on average 1.3512265339171114) internal successors, (22529), 16739 states have internal predecessors, (22529), 1860 states have call successors, (1860), 1087 states have call predecessors, (1860), 1086 states have return successors, (1858), 1794 states have call predecessors, (1858), 1858 states have call successors, (1858) [2024-11-14 03:50:25,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19620 states to 19620 states and 26247 transitions. [2024-11-14 03:50:25,070 INFO L78 Accepts]: Start accepts. Automaton has 19620 states and 26247 transitions. Word has length 149 [2024-11-14 03:50:25,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:50:25,070 INFO L471 AbstractCegarLoop]: Abstraction has 19620 states and 26247 transitions. [2024-11-14 03:50:25,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-14 03:50:25,071 INFO L276 IsEmpty]: Start isEmpty. Operand 19620 states and 26247 transitions. [2024-11-14 03:50:25,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2024-11-14 03:50:25,114 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:50:25,115 INFO L215 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:50:25,139 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 03:50:25,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-14 03:50:25,316 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:50:25,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:50:25,317 INFO L85 PathProgramCache]: Analyzing trace with hash -531151584, now seen corresponding path program 1 times [2024-11-14 03:50:25,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:50:25,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467537310] [2024-11-14 03:50:25,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:50:25,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:50:25,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:50:25,954 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-11-14 03:50:25,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:50:25,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467537310] [2024-11-14 03:50:25,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467537310] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:50:25,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794579482] [2024-11-14 03:50:25,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:50:25,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:50:25,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:50:25,957 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:50:25,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 03:50:26,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:50:26,325 INFO L255 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-14 03:50:26,330 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:50:26,963 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 66 proven. 29 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 03:50:26,963 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:50:27,832 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 53 proven. 3 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-11-14 03:50:27,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794579482] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:50:27,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [206017438] [2024-11-14 03:50:27,868 INFO L159 IcfgInterpreter]: Started Sifa with 78 locations of interest [2024-11-14 03:50:27,868 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:50:27,873 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:50:27,879 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:50:27,879 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:50:40,992 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 49 for LOIs [2024-11-14 03:50:40,996 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 173 for LOIs [2024-11-14 03:50:41,157 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 164 for LOIs [2024-11-14 03:50:41,326 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 121 for LOIs [2024-11-14 03:50:41,383 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 44 for LOIs [2024-11-14 03:50:41,486 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 73 for LOIs [2024-11-14 03:50:41,611 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 44 for LOIs [2024-11-14 03:50:42,401 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:50:57,852 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '221713#(and (<= 1 |#StackHeapBarrier|) (<= ~local~0 2147483647) (= 0 ~t5_pc~0) (= ~t1_pc~0 0) (= ~t1_i~0 1) (<= 0 (+ ~local~0 2147483648)) (= 0 ~t6_pc~0) (= 0 ~t3_pc~0) (= ~m_pc~0 1) (= ~m_i~0 1) (= ~t6_i~0 1) (= ~t2_i~0 1) (= 0 ~t2_pc~0) (= ~m_st~0 1) (<= ~token~0 2147483647) (= ~t5_i~0 1) (= 0 ~t4_pc~0) (= ~t3_i~0 1) (= ~t4_i~0 1) (<= 0 (+ ~token~0 2147483648)) (not (= ~token~0 (+ 6 ~local~0))))' at error location [2024-11-14 03:50:57,852 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:50:57,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:50:57,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 10] total 21 [2024-11-14 03:50:57,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227311483] [2024-11-14 03:50:57,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:50:57,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-14 03:50:57,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:50:57,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-14 03:50:57,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=3662, Unknown=0, NotChecked=0, Total=4032 [2024-11-14 03:50:57,858 INFO L87 Difference]: Start difference. First operand 19620 states and 26247 transitions. Second operand has 21 states, 14 states have (on average 16.428571428571427) internal successors, (230), 16 states have internal predecessors, (230), 10 states have call successors, (39), 9 states have call predecessors, (39), 12 states have return successors, (38), 10 states have call predecessors, (38), 10 states have call successors, (38) [2024-11-14 03:51:03,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:51:03,434 INFO L93 Difference]: Finished difference Result 72560 states and 97805 transitions. [2024-11-14 03:51:03,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-14 03:51:03,435 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 14 states have (on average 16.428571428571427) internal successors, (230), 16 states have internal predecessors, (230), 10 states have call successors, (39), 9 states have call predecessors, (39), 12 states have return successors, (38), 10 states have call predecessors, (38), 10 states have call successors, (38) Word has length 148 [2024-11-14 03:51:03,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:51:03,660 INFO L225 Difference]: With dead ends: 72560 [2024-11-14 03:51:03,660 INFO L226 Difference]: Without dead ends: 52946 [2024-11-14 03:51:03,709 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 365 SyntacticMatches, 43 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4483 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=941, Invalid=7615, Unknown=0, NotChecked=0, Total=8556 [2024-11-14 03:51:03,710 INFO L432 NwaCegarLoop]: 128 mSDtfsCounter, 3477 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 1383 mSolverCounterSat, 941 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3477 SdHoareTripleChecker+Valid, 1037 SdHoareTripleChecker+Invalid, 2324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 941 IncrementalHoareTripleChecker+Valid, 1383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:51:03,710 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3477 Valid, 1037 Invalid, 2324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [941 Valid, 1383 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-14 03:51:03,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52946 states. [2024-11-14 03:51:06,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52946 to 48022. [2024-11-14 03:51:06,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48022 states, 41143 states have (on average 1.3272488637192232) internal successors, (54607), 41289 states have internal predecessors, (54607), 4162 states have call successors, (4162), 2717 states have call predecessors, (4162), 2716 states have return successors, (4160), 4016 states have call predecessors, (4160), 4160 states have call successors, (4160) [2024-11-14 03:51:06,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48022 states to 48022 states and 62929 transitions. [2024-11-14 03:51:06,510 INFO L78 Accepts]: Start accepts. Automaton has 48022 states and 62929 transitions. Word has length 148 [2024-11-14 03:51:06,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:51:06,511 INFO L471 AbstractCegarLoop]: Abstraction has 48022 states and 62929 transitions. [2024-11-14 03:51:06,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 14 states have (on average 16.428571428571427) internal successors, (230), 16 states have internal predecessors, (230), 10 states have call successors, (39), 9 states have call predecessors, (39), 12 states have return successors, (38), 10 states have call predecessors, (38), 10 states have call successors, (38) [2024-11-14 03:51:06,512 INFO L276 IsEmpty]: Start isEmpty. Operand 48022 states and 62929 transitions. [2024-11-14 03:51:06,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2024-11-14 03:51:06,608 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:51:06,608 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:51:06,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 03:51:06,814 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-14 03:51:06,816 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:51:06,816 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:51:06,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1615162448, now seen corresponding path program 1 times [2024-11-14 03:51:06,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:51:06,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216385211] [2024-11-14 03:51:06,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:51:06,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:51:06,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:51:07,155 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-14 03:51:07,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:51:07,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216385211] [2024-11-14 03:51:07,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216385211] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:51:07,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731501553] [2024-11-14 03:51:07,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:51:07,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:51:07,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:51:07,158 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:51:07,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 03:51:07,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:51:07,375 INFO L255 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 03:51:07,381 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:51:07,437 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-14 03:51:07,437 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:51:07,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731501553] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:51:07,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:51:07,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-14 03:51:07,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187094570] [2024-11-14 03:51:07,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:51:07,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:51:07,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:51:07,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:51:07,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:51:07,440 INFO L87 Difference]: Start difference. First operand 48022 states and 62929 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-14 03:51:11,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:51:11,028 INFO L93 Difference]: Finished difference Result 112554 states and 149496 transitions. [2024-11-14 03:51:11,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:51:11,029 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 147 [2024-11-14 03:51:11,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:51:11,364 INFO L225 Difference]: With dead ends: 112554 [2024-11-14 03:51:11,364 INFO L226 Difference]: Without dead ends: 64538 [2024-11-14 03:51:11,438 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:51:11,439 INFO L432 NwaCegarLoop]: 174 mSDtfsCounter, 90 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:51:11,440 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 316 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:51:11,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64538 states. [2024-11-14 03:51:14,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64538 to 53382. [2024-11-14 03:51:14,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53382 states, 46211 states have (on average 1.3500465257189846) internal successors, (62387), 46358 states have internal predecessors, (62387), 4308 states have call successors, (4308), 2863 states have call predecessors, (4308), 2862 states have return successors, (4306), 4161 states have call predecessors, (4306), 4306 states have call successors, (4306) [2024-11-14 03:51:14,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53382 states to 53382 states and 71001 transitions. [2024-11-14 03:51:14,910 INFO L78 Accepts]: Start accepts. Automaton has 53382 states and 71001 transitions. Word has length 147 [2024-11-14 03:51:14,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:51:14,912 INFO L471 AbstractCegarLoop]: Abstraction has 53382 states and 71001 transitions. [2024-11-14 03:51:14,912 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-14 03:51:14,912 INFO L276 IsEmpty]: Start isEmpty. Operand 53382 states and 71001 transitions. [2024-11-14 03:51:15,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2024-11-14 03:51:15,055 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:51:15,055 INFO L215 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:51:15,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 03:51:15,260 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-14 03:51:15,260 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:51:15,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:51:15,261 INFO L85 PathProgramCache]: Analyzing trace with hash 2027916104, now seen corresponding path program 1 times [2024-11-14 03:51:15,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:51:15,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994837984] [2024-11-14 03:51:15,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:51:15,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:51:15,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:51:15,954 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-11-14 03:51:15,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:51:15,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994837984] [2024-11-14 03:51:15,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994837984] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:51:15,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470231168] [2024-11-14 03:51:15,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:51:15,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:51:15,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:51:15,958 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:51:15,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 03:51:16,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:51:16,233 INFO L255 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-14 03:51:16,242 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:51:16,416 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-14 03:51:16,417 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:51:16,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470231168] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:51:16,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:51:16,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-14 03:51:16,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396385855] [2024-11-14 03:51:16,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:51:16,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:51:16,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:51:16,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:51:16,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-14 03:51:16,420 INFO L87 Difference]: Start difference. First operand 53382 states and 71001 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 3 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2024-11-14 03:51:20,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:51:20,529 INFO L93 Difference]: Finished difference Result 86464 states and 115498 transitions. [2024-11-14 03:51:20,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 03:51:20,529 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 3 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 151 [2024-11-14 03:51:20,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:51:20,785 INFO L225 Difference]: With dead ends: 86464 [2024-11-14 03:51:20,785 INFO L226 Difference]: Without dead ends: 59046 [2024-11-14 03:51:20,847 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-14 03:51:20,849 INFO L432 NwaCegarLoop]: 260 mSDtfsCounter, 135 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:51:20,849 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 625 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 03:51:20,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59046 states. [2024-11-14 03:51:23,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59046 to 58326. [2024-11-14 03:51:23,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58326 states, 50071 states have (on average 1.354296898404266) internal successors, (67811), 50290 states have internal predecessors, (67811), 5036 states have call successors, (5036), 3219 states have call predecessors, (5036), 3218 states have return successors, (5034), 4817 states have call predecessors, (5034), 5034 states have call successors, (5034) [2024-11-14 03:51:23,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58326 states to 58326 states and 77881 transitions. [2024-11-14 03:51:24,022 INFO L78 Accepts]: Start accepts. Automaton has 58326 states and 77881 transitions. Word has length 151 [2024-11-14 03:51:24,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:51:24,022 INFO L471 AbstractCegarLoop]: Abstraction has 58326 states and 77881 transitions. [2024-11-14 03:51:24,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 3 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2024-11-14 03:51:24,023 INFO L276 IsEmpty]: Start isEmpty. Operand 58326 states and 77881 transitions. [2024-11-14 03:51:24,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2024-11-14 03:51:24,114 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:51:24,114 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:51:24,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 03:51:24,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-14 03:51:24,316 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:51:24,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:51:24,317 INFO L85 PathProgramCache]: Analyzing trace with hash 111120131, now seen corresponding path program 1 times [2024-11-14 03:51:24,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:51:24,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389777150] [2024-11-14 03:51:24,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:51:24,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:51:24,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:51:24,473 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-11-14 03:51:24,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:51:24,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389777150] [2024-11-14 03:51:24,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389777150] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:51:24,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775659352] [2024-11-14 03:51:24,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:51:24,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:51:24,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:51:24,477 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:51:24,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d7d87-e69c-45d5-8b1a-f1b206648610/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 03:51:24,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:51:24,655 INFO L255 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:51:24,659 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:51:24,691 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-14 03:51:24,692 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:51:24,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775659352] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:51:24,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:51:24,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-14 03:51:24,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304263771] [2024-11-14 03:51:24,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:51:24,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:51:24,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:51:24,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:51:24,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:51:24,693 INFO L87 Difference]: Start difference. First operand 58326 states and 77881 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11)