./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.07.cil-2.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_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/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_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.07.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/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_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/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 ea2a15ada4a316287b701d4046ee75147e37e2af1b0a94d8406d231cafa83990 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 03:14:04,735 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 03:14:04,860 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 03:14:04,867 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 03:14:04,867 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 03:14:04,898 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 03:14:04,899 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 03:14:04,899 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 03:14:04,900 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 03:14:04,900 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 03:14:04,900 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 03:14:04,900 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 03:14:04,900 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 03:14:04,900 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 03:14:04,901 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 03:14:04,901 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 03:14:04,901 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 03:14:04,901 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 03:14:04,901 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 03:14:04,901 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 03:14:04,901 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 03:14:04,902 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 03:14:04,902 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 03:14:04,902 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 03:14:04,902 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 03:14:04,902 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 03:14:04,903 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 03:14:04,903 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 03:14:04,903 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 03:14:04,903 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 03:14:04,903 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 03:14:04,903 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 03:14:04,903 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 03:14:04,904 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 03:14:04,904 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 03:14:04,904 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 03:14:04,904 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 03:14:04,904 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 03:14:04,904 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:14:04,905 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 03:14:04,905 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 03:14:04,905 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 03:14:04,905 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 03:14:04,905 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 03:14:04,905 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 03:14:04,905 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 03:14:04,906 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 03:14:04,906 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_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/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 -> ea2a15ada4a316287b701d4046ee75147e37e2af1b0a94d8406d231cafa83990 [2024-11-14 03:14:05,348 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 03:14:05,361 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 03:14:05,364 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 03:14:05,365 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 03:14:05,366 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 03:14:05,369 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.07.cil-2.c Unable to find full path for "g++" [2024-11-14 03:14:07,798 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 03:14:08,859 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 03:14:08,860 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/sv-benchmarks/c/combinations/Problem05_label45+token_ring.07.cil-2.c [2024-11-14 03:14:08,921 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/data/df4dc10ce/da500ae46d8e4a6aaca7964a8169e5e0/FLAG06dad934c [2024-11-14 03:14:08,948 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/data/df4dc10ce/da500ae46d8e4a6aaca7964a8169e5e0 [2024-11-14 03:14:08,951 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 03:14:08,953 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 03:14:08,955 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 03:14:08,956 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 03:14:08,960 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 03:14:08,962 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:14:08" (1/1) ... [2024-11-14 03:14:08,964 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dbf4d28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:14:08, skipping insertion in model container [2024-11-14 03:14:08,966 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:14:08" (1/1) ... [2024-11-14 03:14:09,200 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 03:14:11,766 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_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/sv-benchmarks/c/combinations/Problem05_label45+token_ring.07.cil-2.c[380323,380336] [2024-11-14 03:14:11,814 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_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/sv-benchmarks/c/combinations/Problem05_label45+token_ring.07.cil-2.c[383339,383352] [2024-11-14 03:14:12,205 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:14:12,220 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 03:14:13,568 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_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/sv-benchmarks/c/combinations/Problem05_label45+token_ring.07.cil-2.c[380323,380336] [2024-11-14 03:14:13,576 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_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/sv-benchmarks/c/combinations/Problem05_label45+token_ring.07.cil-2.c[383339,383352] [2024-11-14 03:14:13,614 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:14:13,784 INFO L204 MainTranslator]: Completed translation [2024-11-14 03:14:13,785 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:14:13 WrapperNode [2024-11-14 03:14:13,787 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 03:14:13,788 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 03:14:13,791 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 03:14:13,791 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 03:14:13,800 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:14:13" (1/1) ... [2024-11-14 03:14:13,881 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:14:13" (1/1) ... [2024-11-14 03:14:14,272 INFO L138 Inliner]: procedures = 58, calls = 63, calls flagged for inlining = 35, calls inlined = 35, statements flattened = 12928 [2024-11-14 03:14:14,273 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 03:14:14,275 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 03:14:14,275 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 03:14:14,275 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 03:14:14,285 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:14:13" (1/1) ... [2024-11-14 03:14:14,286 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:14:13" (1/1) ... [2024-11-14 03:14:14,441 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:14:13" (1/1) ... [2024-11-14 03:14:14,442 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:14:13" (1/1) ... [2024-11-14 03:14:14,757 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:14:13" (1/1) ... [2024-11-14 03:14:14,865 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:14:13" (1/1) ... [2024-11-14 03:14:14,914 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:14:13" (1/1) ... [2024-11-14 03:14:14,944 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:14:13" (1/1) ... [2024-11-14 03:14:15,014 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 03:14:15,015 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 03:14:15,015 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 03:14:15,015 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 03:14:15,017 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:14:13" (1/1) ... [2024-11-14 03:14:15,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:14:15,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:14:15,061 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 03:14:15,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 03:14:15,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 03:14:15,105 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2024-11-14 03:14:15,106 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2024-11-14 03:14:15,106 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-14 03:14:15,106 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-14 03:14:15,106 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2024-11-14 03:14:15,106 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2024-11-14 03:14:15,107 INFO L130 BoogieDeclarations]: Found specification of procedure error [2024-11-14 03:14:15,107 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2024-11-14 03:14:15,107 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2024-11-14 03:14:15,107 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2024-11-14 03:14:15,107 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2024-11-14 03:14:15,107 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2024-11-14 03:14:15,107 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2024-11-14 03:14:15,107 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2024-11-14 03:14:15,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 03:14:15,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 03:14:15,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 03:14:15,307 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 03:14:15,310 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 03:14:29,523 INFO L? ?]: Removed 1729 outVars from TransFormulas that were not future-live. [2024-11-14 03:14:29,524 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 03:14:32,657 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 03:14:32,658 INFO L316 CfgBuilder]: Removed 11 assume(true) statements. [2024-11-14 03:14:32,658 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:14:32 BoogieIcfgContainer [2024-11-14 03:14:32,659 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 03:14:32,662 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 03:14:32,662 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 03:14:32,668 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 03:14:32,668 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 03:14:08" (1/3) ... [2024-11-14 03:14:32,669 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60862e7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:14:32, skipping insertion in model container [2024-11-14 03:14:32,669 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:14:13" (2/3) ... [2024-11-14 03:14:32,670 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60862e7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:14:32, skipping insertion in model container [2024-11-14 03:14:32,670 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:14:32" (3/3) ... [2024-11-14 03:14:32,672 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label45+token_ring.07.cil-2.c [2024-11-14 03:14:32,693 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 03:14:32,697 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG Problem05_label45+token_ring.07.cil-2.c that has 8 procedures, 1790 locations, 1 initial locations, 11 loop locations, and 2 error locations. [2024-11-14 03:14:32,860 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 03:14:32,877 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;@5abe028d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 03:14:32,878 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-14 03:14:32,890 INFO L276 IsEmpty]: Start isEmpty. Operand has 1790 states, 1757 states have (on average 1.9618668184405237) internal successors, (3447), 1762 states have internal predecessors, (3447), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2024-11-14 03:14:32,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-14 03:14:32,903 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:14:32,904 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:14:32,905 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:14:32,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:14:32,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1610946123, now seen corresponding path program 1 times [2024-11-14 03:14:32,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:14:32,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963156913] [2024-11-14 03:14:32,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:32,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:14:33,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:33,702 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 03:14:33,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:14:33,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963156913] [2024-11-14 03:14:33,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963156913] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:14:33,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:14:33,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 03:14:33,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585269446] [2024-11-14 03:14:33,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:14:33,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:14:33,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:14:33,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:14:33,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:14:33,762 INFO L87 Difference]: Start difference. First operand has 1790 states, 1757 states have (on average 1.9618668184405237) internal successors, (3447), 1762 states have internal predecessors, (3447), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (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 03:14:35,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:14:35,330 INFO L93 Difference]: Finished difference Result 3703 states and 7191 transitions. [2024-11-14 03:14:35,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:14:35,334 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (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 53 [2024-11-14 03:14:35,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:14:35,366 INFO L225 Difference]: With dead ends: 3703 [2024-11-14 03:14:35,366 INFO L226 Difference]: Without dead ends: 1912 [2024-11-14 03:14:35,379 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 03:14:35,385 INFO L432 NwaCegarLoop]: 3384 mSDtfsCounter, 3638 mSDsluCounter, 3304 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3638 SdHoareTripleChecker+Valid, 6688 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:14:35,387 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3638 Valid, 6688 Invalid, 664 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-14 03:14:35,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1912 states. [2024-11-14 03:14:35,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1912 to 1911. [2024-11-14 03:14:35,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1857 states have (on average 1.9289176090468498) internal successors, (3582), 1861 states have internal predecessors, (3582), 40 states have call successors, (40), 13 states have call predecessors, (40), 12 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2024-11-14 03:14:35,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 3660 transitions. [2024-11-14 03:14:35,617 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 3660 transitions. Word has length 53 [2024-11-14 03:14:35,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:14:35,619 INFO L471 AbstractCegarLoop]: Abstraction has 1911 states and 3660 transitions. [2024-11-14 03:14:35,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (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 03:14:35,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 3660 transitions. [2024-11-14 03:14:35,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-14 03:14:35,632 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:14:35,633 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:14:35,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 03:14:35,634 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:14:35,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:14:35,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1209192400, now seen corresponding path program 1 times [2024-11-14 03:14:35,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:14:35,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512747610] [2024-11-14 03:14:35,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:35,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:14:35,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:36,070 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:14:36,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:14:36,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512747610] [2024-11-14 03:14:36,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512747610] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:14:36,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979801440] [2024-11-14 03:14:36,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:36,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:36,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:14:36,075 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:14:36,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 03:14:36,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:36,373 INFO L255 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:14:36,383 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:14:36,484 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 03:14:36,484 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:14:36,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979801440] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:14:36,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:14:36,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:14:36,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829981256] [2024-11-14 03:14:36,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:14:36,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:14:36,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:14:36,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:14:36,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:14:36,490 INFO L87 Difference]: Start difference. First operand 1911 states and 3660 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (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 03:14:37,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:14:37,384 INFO L93 Difference]: Finished difference Result 2434 states and 4437 transitions. [2024-11-14 03:14:37,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:14:37,385 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (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 103 [2024-11-14 03:14:37,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:14:37,407 INFO L225 Difference]: With dead ends: 2434 [2024-11-14 03:14:37,407 INFO L226 Difference]: Without dead ends: 2169 [2024-11-14 03:14:37,410 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 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 03:14:37,414 INFO L432 NwaCegarLoop]: 3279 mSDtfsCounter, 3451 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3451 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 03:14:37,415 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3451 Valid, 3444 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 03:14:37,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2169 states. [2024-11-14 03:14:37,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2169 to 2163. [2024-11-14 03:14:37,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2065 states have (on average 1.8794188861985472) internal successors, (3881), 2070 states have internal predecessors, (3881), 72 states have call successors, (72), 25 states have call predecessors, (72), 24 states have return successors, (70), 68 states have call predecessors, (70), 70 states have call successors, (70) [2024-11-14 03:14:37,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 4023 transitions. [2024-11-14 03:14:37,566 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 4023 transitions. Word has length 103 [2024-11-14 03:14:37,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:14:37,568 INFO L471 AbstractCegarLoop]: Abstraction has 2163 states and 4023 transitions. [2024-11-14 03:14:37,568 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (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 03:14:37,569 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 4023 transitions. [2024-11-14 03:14:37,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-14 03:14:37,574 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:14:37,574 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:14:37,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 03:14:37,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:37,775 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:14:37,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:14:37,776 INFO L85 PathProgramCache]: Analyzing trace with hash -676130030, now seen corresponding path program 1 times [2024-11-14 03:14:37,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:14:37,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764798442] [2024-11-14 03:14:37,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:37,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:14:37,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:38,155 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:14:38,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:14:38,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764798442] [2024-11-14 03:14:38,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764798442] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:14:38,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79657993] [2024-11-14 03:14:38,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:38,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:38,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:14:38,160 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:14:38,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 03:14:38,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:38,424 INFO L255 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:14:38,429 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:14:38,502 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 03:14:38,502 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:14:38,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79657993] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:14:38,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:14:38,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:14:38,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351360508] [2024-11-14 03:14:38,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:14:38,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:14:38,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:14:38,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:14:38,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:14:38,505 INFO L87 Difference]: Start difference. First operand 2163 states and 4023 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (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 03:14:39,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:14:39,263 INFO L93 Difference]: Finished difference Result 3184 states and 5534 transitions. [2024-11-14 03:14:39,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:14:39,264 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (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 103 [2024-11-14 03:14:39,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:14:39,286 INFO L225 Difference]: With dead ends: 3184 [2024-11-14 03:14:39,286 INFO L226 Difference]: Without dead ends: 2667 [2024-11-14 03:14:39,290 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 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 03:14:39,293 INFO L432 NwaCegarLoop]: 3229 mSDtfsCounter, 3445 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3445 SdHoareTripleChecker+Valid, 3394 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:14:39,294 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3445 Valid, 3394 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:14:39,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2667 states. [2024-11-14 03:14:39,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2667 to 2659. [2024-11-14 03:14:39,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2659 states, 2475 states have (on average 1.804848484848485) internal successors, (4467), 2482 states have internal predecessors, (4467), 134 states have call successors, (134), 49 states have call predecessors, (134), 48 states have return successors, (132), 128 states have call predecessors, (132), 132 states have call successors, (132) [2024-11-14 03:14:39,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2659 states to 2659 states and 4733 transitions. [2024-11-14 03:14:39,447 INFO L78 Accepts]: Start accepts. Automaton has 2659 states and 4733 transitions. Word has length 103 [2024-11-14 03:14:39,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:14:39,448 INFO L471 AbstractCegarLoop]: Abstraction has 2659 states and 4733 transitions. [2024-11-14 03:14:39,448 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (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 03:14:39,448 INFO L276 IsEmpty]: Start isEmpty. Operand 2659 states and 4733 transitions. [2024-11-14 03:14:39,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-14 03:14:39,456 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:14:39,457 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:14:39,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 03:14:39,661 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:39,661 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:14:39,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:14:39,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1466994732, now seen corresponding path program 1 times [2024-11-14 03:14:39,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:14:39,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434215543] [2024-11-14 03:14:39,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:39,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:14:39,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:39,943 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:14:39,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:14:39,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434215543] [2024-11-14 03:14:39,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434215543] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:14:39,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147520417] [2024-11-14 03:14:39,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:39,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:39,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:14:39,950 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:14:39,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 03:14:40,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:40,201 INFO L255 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:14:40,204 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:14:40,275 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-14 03:14:40,275 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:14:40,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147520417] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:14:40,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:14:40,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:14:40,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609646652] [2024-11-14 03:14:40,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:14:40,276 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:14:40,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:14:40,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:14:40,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:14:40,277 INFO L87 Difference]: Start difference. First operand 2659 states and 4733 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (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 03:14:41,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:14:41,058 INFO L93 Difference]: Finished difference Result 4660 states and 7678 transitions. [2024-11-14 03:14:41,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:14:41,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (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 103 [2024-11-14 03:14:41,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:14:41,082 INFO L225 Difference]: With dead ends: 4660 [2024-11-14 03:14:41,083 INFO L226 Difference]: Without dead ends: 3647 [2024-11-14 03:14:41,089 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 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 03:14:41,090 INFO L432 NwaCegarLoop]: 3229 mSDtfsCounter, 3454 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3454 SdHoareTripleChecker+Valid, 3394 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:14:41,090 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3454 Valid, 3394 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:14:41,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3647 states. [2024-11-14 03:14:41,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3647 to 3635. [2024-11-14 03:14:41,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3635 states, 3283 states have (on average 1.7103259214133415) internal successors, (5615), 3294 states have internal predecessors, (5615), 254 states have call successors, (254), 97 states have call predecessors, (254), 96 states have return successors, (252), 244 states have call predecessors, (252), 252 states have call successors, (252) [2024-11-14 03:14:41,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3635 states to 3635 states and 6121 transitions. [2024-11-14 03:14:41,274 INFO L78 Accepts]: Start accepts. Automaton has 3635 states and 6121 transitions. Word has length 103 [2024-11-14 03:14:41,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:14:41,275 INFO L471 AbstractCegarLoop]: Abstraction has 3635 states and 6121 transitions. [2024-11-14 03:14:41,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (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 03:14:41,275 INFO L276 IsEmpty]: Start isEmpty. Operand 3635 states and 6121 transitions. [2024-11-14 03:14:41,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-14 03:14:41,283 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:14:41,283 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:14:41,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 03:14:41,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:41,484 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:14:41,484 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:14:41,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1820177070, now seen corresponding path program 1 times [2024-11-14 03:14:41,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:14:41,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73301940] [2024-11-14 03:14:41,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:41,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:14:41,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:41,717 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:14:41,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:14:41,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73301940] [2024-11-14 03:14:41,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73301940] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:14:41,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294845397] [2024-11-14 03:14:41,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:41,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:41,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:14:41,726 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:14:41,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 03:14:41,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:41,970 INFO L255 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:14:41,978 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:14:42,063 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 03:14:42,063 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:14:42,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294845397] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:14:42,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:14:42,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:14:42,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935695049] [2024-11-14 03:14:42,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:14:42,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:14:42,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:14:42,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:14:42,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:14:42,065 INFO L87 Difference]: Start difference. First operand 3635 states and 6121 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (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 03:14:42,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:14:42,871 INFO L93 Difference]: Finished difference Result 7564 states and 11866 transitions. [2024-11-14 03:14:42,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:14:42,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (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 103 [2024-11-14 03:14:42,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:14:42,910 INFO L225 Difference]: With dead ends: 7564 [2024-11-14 03:14:42,910 INFO L226 Difference]: Without dead ends: 5575 [2024-11-14 03:14:42,920 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 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 03:14:42,922 INFO L432 NwaCegarLoop]: 3229 mSDtfsCounter, 3439 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3439 SdHoareTripleChecker+Valid, 3394 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:14:42,923 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3439 Valid, 3394 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:14:42,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5575 states. [2024-11-14 03:14:43,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5575 to 5555. [2024-11-14 03:14:43,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5555 states, 4875 states have (on average 1.612923076923077) internal successors, (7863), 4894 states have internal predecessors, (7863), 486 states have call successors, (486), 193 states have call predecessors, (486), 192 states have return successors, (484), 468 states have call predecessors, (484), 484 states have call successors, (484) [2024-11-14 03:14:43,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5555 states to 5555 states and 8833 transitions. [2024-11-14 03:14:43,240 INFO L78 Accepts]: Start accepts. Automaton has 5555 states and 8833 transitions. Word has length 103 [2024-11-14 03:14:43,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:14:43,241 INFO L471 AbstractCegarLoop]: Abstraction has 5555 states and 8833 transitions. [2024-11-14 03:14:43,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (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 03:14:43,242 INFO L276 IsEmpty]: Start isEmpty. Operand 5555 states and 8833 transitions. [2024-11-14 03:14:43,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-14 03:14:43,254 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:14:43,254 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:14:43,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-14 03:14:43,455 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:43,455 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:14:43,456 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:14:43,456 INFO L85 PathProgramCache]: Analyzing trace with hash -452205676, now seen corresponding path program 1 times [2024-11-14 03:14:43,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:14:43,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098736478] [2024-11-14 03:14:43,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:43,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:14:43,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:43,631 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-14 03:14:43,631 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:14:43,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098736478] [2024-11-14 03:14:43,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098736478] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:14:43,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:14:43,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:14:43,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314610351] [2024-11-14 03:14:43,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:14:43,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:14:43,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:14:43,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:14:43,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:14:43,634 INFO L87 Difference]: Start difference. First operand 5555 states and 8833 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 03:14:44,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:14:44,538 INFO L93 Difference]: Finished difference Result 8663 states and 13380 transitions. [2024-11-14 03:14:44,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:14:44,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 103 [2024-11-14 03:14:44,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:14:44,592 INFO L225 Difference]: With dead ends: 8663 [2024-11-14 03:14:44,593 INFO L226 Difference]: Without dead ends: 6643 [2024-11-14 03:14:44,604 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 03:14:44,604 INFO L432 NwaCegarLoop]: 3323 mSDtfsCounter, 89 mSDsluCounter, 3237 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 6560 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:14:44,605 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 6560 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:14:44,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6643 states. [2024-11-14 03:14:45,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6643 to 6323. [2024-11-14 03:14:45,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6323 states, 5611 states have (on average 1.6095170201390125) internal successors, (9031), 5630 states have internal predecessors, (9031), 502 states have call successors, (502), 209 states have call predecessors, (502), 208 states have return successors, (500), 484 states have call predecessors, (500), 500 states have call successors, (500) [2024-11-14 03:14:45,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6323 states to 6323 states and 10033 transitions. [2024-11-14 03:14:45,139 INFO L78 Accepts]: Start accepts. Automaton has 6323 states and 10033 transitions. Word has length 103 [2024-11-14 03:14:45,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:14:45,140 INFO L471 AbstractCegarLoop]: Abstraction has 6323 states and 10033 transitions. [2024-11-14 03:14:45,140 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 03:14:45,141 INFO L276 IsEmpty]: Start isEmpty. Operand 6323 states and 10033 transitions. [2024-11-14 03:14:45,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-11-14 03:14:45,162 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:14:45,162 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:14:45,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-14 03:14:45,162 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:14:45,163 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:14:45,163 INFO L85 PathProgramCache]: Analyzing trace with hash -2005157394, now seen corresponding path program 1 times [2024-11-14 03:14:45,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:14:45,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837844518] [2024-11-14 03:14:45,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:45,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:14:45,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:45,306 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-14 03:14:45,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:14:45,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837844518] [2024-11-14 03:14:45,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837844518] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:14:45,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:14:45,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:14:45,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981034794] [2024-11-14 03:14:45,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:14:45,307 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:14:45,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:14:45,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:14:45,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:14:45,308 INFO L87 Difference]: Start difference. First operand 6323 states and 10033 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (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 03:14:46,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:14:46,251 INFO L93 Difference]: Finished difference Result 15532 states and 23546 transitions. [2024-11-14 03:14:46,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:14:46,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (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 139 [2024-11-14 03:14:46,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:14:46,347 INFO L225 Difference]: With dead ends: 15532 [2024-11-14 03:14:46,347 INFO L226 Difference]: Without dead ends: 10855 [2024-11-14 03:14:46,367 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 03:14:46,368 INFO L432 NwaCegarLoop]: 3231 mSDtfsCounter, 3442 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3442 SdHoareTripleChecker+Valid, 3396 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:14:46,369 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3442 Valid, 3396 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:14:46,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10855 states. [2024-11-14 03:14:47,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10855 to 10803. [2024-11-14 03:14:47,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10803 states, 9419 states have (on average 1.5363626711965177) internal successors, (14471), 9454 states have internal predecessors, (14471), 966 states have call successors, (966), 417 states have call predecessors, (966), 416 states have return successors, (964), 932 states have call predecessors, (964), 964 states have call successors, (964) [2024-11-14 03:14:47,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10803 states to 10803 states and 16401 transitions. [2024-11-14 03:14:47,196 INFO L78 Accepts]: Start accepts. Automaton has 10803 states and 16401 transitions. Word has length 139 [2024-11-14 03:14:47,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:14:47,196 INFO L471 AbstractCegarLoop]: Abstraction has 10803 states and 16401 transitions. [2024-11-14 03:14:47,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (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 03:14:47,202 INFO L276 IsEmpty]: Start isEmpty. Operand 10803 states and 16401 transitions. [2024-11-14 03:14:47,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-11-14 03:14:47,237 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:14:47,238 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:14:47,238 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-14 03:14:47,238 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:14:47,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:14:47,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1003956033, now seen corresponding path program 1 times [2024-11-14 03:14:47,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:14:47,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210849706] [2024-11-14 03:14:47,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:47,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:14:47,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:47,390 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-14 03:14:47,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:14:47,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210849706] [2024-11-14 03:14:47,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210849706] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:14:47,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:14:47,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:14:47,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784280677] [2024-11-14 03:14:47,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:14:47,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:14:47,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:14:47,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:14:47,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:14:47,393 INFO L87 Difference]: Start difference. First operand 10803 states and 16401 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (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 03:14:48,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:14:48,604 INFO L93 Difference]: Finished difference Result 28828 states and 42618 transitions. [2024-11-14 03:14:48,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:14:48,605 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (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 139 [2024-11-14 03:14:48,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:14:48,724 INFO L225 Difference]: With dead ends: 28828 [2024-11-14 03:14:48,724 INFO L226 Difference]: Without dead ends: 19671 [2024-11-14 03:14:48,767 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 03:14:48,768 INFO L432 NwaCegarLoop]: 3231 mSDtfsCounter, 3444 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3444 SdHoareTripleChecker+Valid, 3396 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:14:48,768 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3444 Valid, 3396 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:14:48,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19671 states. [2024-11-14 03:14:49,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19671 to 19571. [2024-11-14 03:14:49,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19571 states, 16875 states have (on average 1.4833185185185185) internal successors, (25031), 16942 states have internal predecessors, (25031), 1862 states have call successors, (1862), 833 states have call predecessors, (1862), 832 states have return successors, (1860), 1796 states have call predecessors, (1860), 1860 states have call successors, (1860) [2024-11-14 03:14:50,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19571 states to 19571 states and 28753 transitions. [2024-11-14 03:14:50,091 INFO L78 Accepts]: Start accepts. Automaton has 19571 states and 28753 transitions. Word has length 139 [2024-11-14 03:14:50,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:14:50,092 INFO L471 AbstractCegarLoop]: Abstraction has 19571 states and 28753 transitions. [2024-11-14 03:14:50,092 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (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 03:14:50,092 INFO L276 IsEmpty]: Start isEmpty. Operand 19571 states and 28753 transitions. [2024-11-14 03:14:50,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-11-14 03:14:50,173 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:14:50,174 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:14:50,174 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-14 03:14:50,174 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:14:50,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:14:50,175 INFO L85 PathProgramCache]: Analyzing trace with hash -568119047, now seen corresponding path program 1 times [2024-11-14 03:14:50,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:14:50,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394348920] [2024-11-14 03:14:50,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:50,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:14:50,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:50,367 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-14 03:14:50,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:14:50,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394348920] [2024-11-14 03:14:50,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394348920] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:14:50,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:14:50,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:14:50,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89102377] [2024-11-14 03:14:50,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:14:50,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:14:50,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:14:50,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:14:50,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:14:50,371 INFO L87 Difference]: Start difference. First operand 19571 states and 28753 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (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 03:14:52,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:14:52,931 INFO L93 Difference]: Finished difference Result 54844 states and 79578 transitions. [2024-11-14 03:14:52,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:14:52,931 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (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 139 [2024-11-14 03:14:52,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:14:53,236 INFO L225 Difference]: With dead ends: 54844 [2024-11-14 03:14:53,236 INFO L226 Difference]: Without dead ends: 36919 [2024-11-14 03:14:53,282 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 03:14:53,283 INFO L432 NwaCegarLoop]: 3256 mSDtfsCounter, 3447 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3447 SdHoareTripleChecker+Valid, 3421 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:14:53,283 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3447 Valid, 3421 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:14:53,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36919 states. [2024-11-14 03:14:55,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36919 to 36723. [2024-11-14 03:14:55,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36723 states, 31467 states have (on average 1.446308831474243) internal successors, (45511), 31598 states have internal predecessors, (45511), 3590 states have call successors, (3590), 1665 states have call predecessors, (3590), 1664 states have return successors, (3588), 3460 states have call predecessors, (3588), 3588 states have call successors, (3588) [2024-11-14 03:14:55,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36723 states to 36723 states and 52689 transitions. [2024-11-14 03:14:55,301 INFO L78 Accepts]: Start accepts. Automaton has 36723 states and 52689 transitions. Word has length 139 [2024-11-14 03:14:55,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:14:55,302 INFO L471 AbstractCegarLoop]: Abstraction has 36723 states and 52689 transitions. [2024-11-14 03:14:55,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (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 03:14:55,302 INFO L276 IsEmpty]: Start isEmpty. Operand 36723 states and 52689 transitions. [2024-11-14 03:14:55,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2024-11-14 03:14:55,481 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:14:55,482 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:14:55,482 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-14 03:14:55,482 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:14:55,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:14:55,483 INFO L85 PathProgramCache]: Analyzing trace with hash 693417044, now seen corresponding path program 1 times [2024-11-14 03:14:55,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:14:55,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128900012] [2024-11-14 03:14:55,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:55,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:14:55,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:56,341 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 51 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-14 03:14:56,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:14:56,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128900012] [2024-11-14 03:14:56,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128900012] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:14:56,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46034419] [2024-11-14 03:14:56,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:56,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:56,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:14:56,345 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:14:56,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 03:14:56,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:56,608 INFO L255 TraceCheckSpWp]: Trace formula consists of 795 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:14:56,613 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:14:56,671 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-14 03:14:56,671 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:14:56,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46034419] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:14:56,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:14:56,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-14 03:14:56,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023249078] [2024-11-14 03:14:56,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:14:56,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:14:56,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:14:56,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:14:56,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:14:56,677 INFO L87 Difference]: Start difference. First operand 36723 states and 52689 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (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 03:14:59,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:14:59,086 INFO L93 Difference]: Finished difference Result 68731 states and 98647 transitions. [2024-11-14 03:14:59,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:14:59,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (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 161 [2024-11-14 03:14:59,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:14:59,428 INFO L225 Difference]: With dead ends: 68731 [2024-11-14 03:14:59,428 INFO L226 Difference]: Without dead ends: 50903 [2024-11-14 03:14:59,510 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 169 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 03:14:59,511 INFO L432 NwaCegarLoop]: 3356 mSDtfsCounter, 140 mSDsluCounter, 3238 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 6594 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:14:59,511 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 6594 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:14:59,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50903 states. [2024-11-14 03:15:02,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50903 to 44755. [2024-11-14 03:15:02,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44755 states, 39115 states have (on average 1.4662150070305509) internal successors, (57351), 39246 states have internal predecessors, (57351), 3782 states have call successors, (3782), 1857 states have call predecessors, (3782), 1856 states have return successors, (3780), 3652 states have call predecessors, (3780), 3780 states have call successors, (3780) [2024-11-14 03:15:02,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44755 states to 44755 states and 64913 transitions. [2024-11-14 03:15:02,761 INFO L78 Accepts]: Start accepts. Automaton has 44755 states and 64913 transitions. Word has length 161 [2024-11-14 03:15:02,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:02,761 INFO L471 AbstractCegarLoop]: Abstraction has 44755 states and 64913 transitions. [2024-11-14 03:15:02,762 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (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 03:15:02,762 INFO L276 IsEmpty]: Start isEmpty. Operand 44755 states and 64913 transitions. [2024-11-14 03:15:03,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2024-11-14 03:15:03,185 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:03,185 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:15:03,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 03:15:03,386 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-14 03:15:03,386 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:15:03,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:03,386 INFO L85 PathProgramCache]: Analyzing trace with hash 130884755, now seen corresponding path program 2 times [2024-11-14 03:15:03,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:03,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791964376] [2024-11-14 03:15:03,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:03,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:03,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:03,822 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 10 proven. 49 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-14 03:15:03,823 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:03,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791964376] [2024-11-14 03:15:03,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791964376] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:15:03,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677196431] [2024-11-14 03:15:03,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:15:03,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:03,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:15:03,826 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:15:03,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 03:15:04,089 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 03:15:04,089 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:15:04,094 INFO L255 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 03:15:04,100 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:15:04,599 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2024-11-14 03:15:04,599 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:15:04,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677196431] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:15:04,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:15:04,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2024-11-14 03:15:04,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593560069] [2024-11-14 03:15:04,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:15:04,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 03:15:04,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:04,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 03:15:04,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-14 03:15:04,602 INFO L87 Difference]: Start difference. First operand 44755 states and 64913 transitions. Second operand has 6 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-14 03:15:09,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:09,811 INFO L93 Difference]: Finished difference Result 75479 states and 109204 transitions. [2024-11-14 03:15:09,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 03:15:09,812 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 161 [2024-11-14 03:15:09,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:10,060 INFO L225 Difference]: With dead ends: 75479 [2024-11-14 03:15:10,060 INFO L226 Difference]: Without dead ends: 49619 [2024-11-14 03:15:10,109 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-11-14 03:15:10,110 INFO L432 NwaCegarLoop]: 3170 mSDtfsCounter, 3539 mSDsluCounter, 9433 mSDsCounter, 0 mSdLazyCounter, 1259 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3551 SdHoareTripleChecker+Valid, 12603 SdHoareTripleChecker+Invalid, 1318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:10,111 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3551 Valid, 12603 Invalid, 1318 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [59 Valid, 1259 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-14 03:15:10,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49619 states. [2024-11-14 03:15:11,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49619 to 49043. [2024-11-14 03:15:12,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49043 states, 43019 states have (on average 1.4462214370394477) internal successors, (62215), 43150 states have internal predecessors, (62215), 3910 states have call successors, (3910), 2113 states have call predecessors, (3910), 2112 states have return successors, (3908), 3780 states have call predecessors, (3908), 3908 states have call successors, (3908) [2024-11-14 03:15:12,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49043 states to 49043 states and 70033 transitions. [2024-11-14 03:15:12,290 INFO L78 Accepts]: Start accepts. Automaton has 49043 states and 70033 transitions. Word has length 161 [2024-11-14 03:15:12,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:12,290 INFO L471 AbstractCegarLoop]: Abstraction has 49043 states and 70033 transitions. [2024-11-14 03:15:12,291 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-14 03:15:12,291 INFO L276 IsEmpty]: Start isEmpty. Operand 49043 states and 70033 transitions. [2024-11-14 03:15:12,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2024-11-14 03:15:12,445 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:12,446 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:15:12,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-14 03:15:12,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-14 03:15:12,652 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:15:12,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:12,652 INFO L85 PathProgramCache]: Analyzing trace with hash 395140915, now seen corresponding path program 1 times [2024-11-14 03:15:12,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:12,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511935785] [2024-11-14 03:15:12,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:12,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:12,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:13,456 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-14 03:15:13,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:13,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511935785] [2024-11-14 03:15:13,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511935785] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:15:13,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430185881] [2024-11-14 03:15:13,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:13,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:13,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:15:13,462 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:15:13,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 03:15:13,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:13,731 INFO L255 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 03:15:13,737 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:15:13,809 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-14 03:15:13,810 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:15:13,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430185881] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:15:13,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:15:13,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-14 03:15:13,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63935181] [2024-11-14 03:15:13,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:15:13,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:15:13,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:13,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:15:13,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:15:13,812 INFO L87 Difference]: Start difference. First operand 49043 states and 70033 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (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 03:15:16,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:16,836 INFO L93 Difference]: Finished difference Result 73387 states and 105687 transitions. [2024-11-14 03:15:16,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:15:16,836 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (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 161 [2024-11-14 03:15:16,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:17,129 INFO L225 Difference]: With dead ends: 73387 [2024-11-14 03:15:17,129 INFO L226 Difference]: Without dead ends: 49175 [2024-11-14 03:15:17,221 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 163 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 03:15:17,222 INFO L432 NwaCegarLoop]: 3363 mSDtfsCounter, 170 mSDsluCounter, 3223 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 6586 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:17,222 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 6586 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 03:15:17,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49175 states. [2024-11-14 03:15:20,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49175 to 48723. [2024-11-14 03:15:20,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48723 states, 42699 states have (on average 1.4315791938921287) internal successors, (61127), 42830 states have internal predecessors, (61127), 3910 states have call successors, (3910), 2113 states have call predecessors, (3910), 2112 states have return successors, (3908), 3780 states have call predecessors, (3908), 3908 states have call successors, (3908) [2024-11-14 03:15:20,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48723 states to 48723 states and 68945 transitions. [2024-11-14 03:15:20,535 INFO L78 Accepts]: Start accepts. Automaton has 48723 states and 68945 transitions. Word has length 161 [2024-11-14 03:15:20,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:20,536 INFO L471 AbstractCegarLoop]: Abstraction has 48723 states and 68945 transitions. [2024-11-14 03:15:20,537 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (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 03:15:20,537 INFO L276 IsEmpty]: Start isEmpty. Operand 48723 states and 68945 transitions. [2024-11-14 03:15:20,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2024-11-14 03:15:20,697 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:20,698 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:15:20,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-14 03:15:20,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-14 03:15:20,899 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:15:20,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:20,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1395297427, now seen corresponding path program 1 times [2024-11-14 03:15:20,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:20,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455206851] [2024-11-14 03:15:20,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:20,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:21,387 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 10 proven. 49 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-14 03:15:21,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:21,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455206851] [2024-11-14 03:15:21,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455206851] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:15:21,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374632262] [2024-11-14 03:15:21,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:21,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:21,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:15:21,391 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:15:21,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 03:15:21,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:21,657 INFO L255 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:15:21,662 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:15:21,722 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-14 03:15:21,722 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:15:21,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374632262] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:15:21,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:15:21,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-14 03:15:21,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693703044] [2024-11-14 03:15:21,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:15:21,724 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:15:21,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:21,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:15:21,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:15:21,727 INFO L87 Difference]: Start difference. First operand 48723 states and 68945 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (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 03:15:24,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:24,230 INFO L93 Difference]: Finished difference Result 80891 states and 112936 transitions. [2024-11-14 03:15:24,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:15:24,230 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (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 161 [2024-11-14 03:15:24,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:24,413 INFO L225 Difference]: With dead ends: 80891 [2024-11-14 03:15:24,414 INFO L226 Difference]: Without dead ends: 57159 [2024-11-14 03:15:24,487 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 163 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 03:15:24,488 INFO L432 NwaCegarLoop]: 3253 mSDtfsCounter, 3450 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3450 SdHoareTripleChecker+Valid, 3296 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:24,488 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3450 Valid, 3296 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 03:15:24,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57159 states. [2024-11-14 03:15:27,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57159 to 57159. [2024-11-14 03:15:27,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57159 states, 50375 states have (on average 1.3950372208436725) internal successors, (70275), 50506 states have internal predecessors, (70275), 4162 states have call successors, (4162), 2621 states have call predecessors, (4162), 2620 states have return successors, (4160), 4032 states have call predecessors, (4160), 4160 states have call successors, (4160) [2024-11-14 03:15:27,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57159 states to 57159 states and 78597 transitions. [2024-11-14 03:15:27,835 INFO L78 Accepts]: Start accepts. Automaton has 57159 states and 78597 transitions. Word has length 161 [2024-11-14 03:15:27,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:27,836 INFO L471 AbstractCegarLoop]: Abstraction has 57159 states and 78597 transitions. [2024-11-14 03:15:27,836 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (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 03:15:27,836 INFO L276 IsEmpty]: Start isEmpty. Operand 57159 states and 78597 transitions. [2024-11-14 03:15:28,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-11-14 03:15:28,197 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:28,198 INFO L215 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:15:28,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 03:15:28,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:28,398 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:15:28,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:28,399 INFO L85 PathProgramCache]: Analyzing trace with hash 2029707081, now seen corresponding path program 1 times [2024-11-14 03:15:28,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:28,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633417887] [2024-11-14 03:15:28,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:28,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:28,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:28,928 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 12 proven. 50 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-14 03:15:28,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:28,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633417887] [2024-11-14 03:15:28,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633417887] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:15:28,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650045721] [2024-11-14 03:15:28,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:28,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:28,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:15:28,931 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:15:28,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff449e82-0d46-4d8c-9b9a-9a8fc173a79e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 03:15:29,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:29,228 INFO L255 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-14 03:15:29,233 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:15:29,781 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 72 proven. 32 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 03:15:29,781 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:15:30,495 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 59 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-14 03:15:30,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650045721] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:15:30,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [127072301] [2024-11-14 03:15:30,532 INFO L159 IcfgInterpreter]: Started Sifa with 83 locations of interest [2024-11-14 03:15:30,532 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:15:30,536 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:15:30,542 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:15:30,542 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs