./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.04.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_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/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_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.04.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/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_c68cef11-655e-4a8f-a443-ffeff95adfb9/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 3a629e5533750136bdc4ecf4cf9ae4f163f3dcd9918add7f5bb2c2e476f05d0e --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 03:57:47,148 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 03:57:47,266 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 03:57:47,273 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 03:57:47,274 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 03:57:47,317 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 03:57:47,318 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 03:57:47,318 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 03:57:47,319 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 03:57:47,319 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 03:57:47,320 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 03:57:47,320 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 03:57:47,321 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 03:57:47,321 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 03:57:47,322 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 03:57:47,323 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 03:57:47,323 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 03:57:47,323 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 03:57:47,323 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 03:57:47,324 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 03:57:47,324 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 03:57:47,324 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 03:57:47,324 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 03:57:47,325 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 03:57:47,325 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 03:57:47,325 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 03:57:47,325 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 03:57:47,325 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 03:57:47,325 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 03:57:47,325 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 03:57:47,325 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 03:57:47,325 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 03:57:47,325 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 03:57:47,326 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 03:57:47,326 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 03:57:47,326 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 03:57:47,327 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 03:57:47,328 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 03:57:47,328 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:57:47,328 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 03:57:47,328 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 03:57:47,328 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 03:57:47,328 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 03:57:47,329 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 03:57:47,329 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 03:57:47,329 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 03:57:47,329 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 03:57:47,329 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_c68cef11-655e-4a8f-a443-ffeff95adfb9/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 -> 3a629e5533750136bdc4ecf4cf9ae4f163f3dcd9918add7f5bb2c2e476f05d0e [2024-11-14 03:57:47,738 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 03:57:47,751 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 03:57:47,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 03:57:47,758 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 03:57:47,758 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 03:57:47,760 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.04.cil-2.c Unable to find full path for "g++" [2024-11-14 03:57:50,215 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 03:57:51,507 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 03:57:51,510 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/sv-benchmarks/c/combinations/Problem05_label42+token_ring.04.cil-2.c [2024-11-14 03:57:51,596 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/data/a9d8c29dd/22c17a3b01d04a25a743799db9c0f001/FLAGc3c2d975e [2024-11-14 03:57:51,622 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/data/a9d8c29dd/22c17a3b01d04a25a743799db9c0f001 [2024-11-14 03:57:51,625 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 03:57:51,628 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 03:57:51,630 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 03:57:51,631 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 03:57:51,637 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 03:57:51,638 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:57:51" (1/1) ... [2024-11-14 03:57:51,640 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9eff732 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:57:51, skipping insertion in model container [2024-11-14 03:57:51,641 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:57:51" (1/1) ... [2024-11-14 03:57:51,933 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 03:57:54,397 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_c68cef11-655e-4a8f-a443-ffeff95adfb9/sv-benchmarks/c/combinations/Problem05_label42+token_ring.04.cil-2.c[378560,378573] [2024-11-14 03:57:54,463 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_c68cef11-655e-4a8f-a443-ffeff95adfb9/sv-benchmarks/c/combinations/Problem05_label42+token_ring.04.cil-2.c[383339,383352] [2024-11-14 03:57:54,797 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:57:54,811 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 03:57:56,250 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_c68cef11-655e-4a8f-a443-ffeff95adfb9/sv-benchmarks/c/combinations/Problem05_label42+token_ring.04.cil-2.c[378560,378573] [2024-11-14 03:57:56,257 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_c68cef11-655e-4a8f-a443-ffeff95adfb9/sv-benchmarks/c/combinations/Problem05_label42+token_ring.04.cil-2.c[383339,383352] [2024-11-14 03:57:56,275 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:57:56,411 INFO L204 MainTranslator]: Completed translation [2024-11-14 03:57:56,412 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:57:56 WrapperNode [2024-11-14 03:57:56,412 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 03:57:56,413 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 03:57:56,413 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 03:57:56,413 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 03:57:56,421 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:57:56" (1/1) ... [2024-11-14 03:57:56,497 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:57:56" (1/1) ... [2024-11-14 03:57:57,081 INFO L138 Inliner]: procedures = 52, calls = 54, calls flagged for inlining = 29, calls inlined = 29, statements flattened = 12751 [2024-11-14 03:57:57,082 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 03:57:57,084 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 03:57:57,084 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 03:57:57,084 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 03:57:57,092 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:57:56" (1/1) ... [2024-11-14 03:57:57,092 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:57:56" (1/1) ... [2024-11-14 03:57:57,149 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:57:56" (1/1) ... [2024-11-14 03:57:57,150 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:57:56" (1/1) ... [2024-11-14 03:57:57,455 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:57:56" (1/1) ... [2024-11-14 03:57:57,556 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:57:56" (1/1) ... [2024-11-14 03:57:57,611 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:57:56" (1/1) ... [2024-11-14 03:57:57,644 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:57:56" (1/1) ... [2024-11-14 03:57:57,710 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 03:57:57,712 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 03:57:57,713 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 03:57:57,713 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 03:57:57,714 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:57:56" (1/1) ... [2024-11-14 03:57:57,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:57:57,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:57:57,765 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 03:57:57,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 03:57:57,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 03:57:57,808 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2024-11-14 03:57:57,809 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2024-11-14 03:57:57,809 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-14 03:57:57,809 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-14 03:57:57,810 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2024-11-14 03:57:57,810 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2024-11-14 03:57:57,810 INFO L130 BoogieDeclarations]: Found specification of procedure error [2024-11-14 03:57:57,810 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2024-11-14 03:57:57,810 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2024-11-14 03:57:57,810 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2024-11-14 03:57:57,810 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2024-11-14 03:57:57,810 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2024-11-14 03:57:57,811 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2024-11-14 03:57:57,811 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2024-11-14 03:57:57,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 03:57:57,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 03:57:57,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 03:57:57,997 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 03:57:58,000 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 03:58:11,290 INFO L? ?]: Removed 1711 outVars from TransFormulas that were not future-live. [2024-11-14 03:58:11,290 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 03:58:14,227 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 03:58:14,227 INFO L316 CfgBuilder]: Removed 8 assume(true) statements. [2024-11-14 03:58:14,228 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:58:14 BoogieIcfgContainer [2024-11-14 03:58:14,228 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 03:58:14,231 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 03:58:14,231 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 03:58:14,237 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 03:58:14,237 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 03:57:51" (1/3) ... [2024-11-14 03:58:14,238 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f237c1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:58:14, skipping insertion in model container [2024-11-14 03:58:14,238 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:57:56" (2/3) ... [2024-11-14 03:58:14,238 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f237c1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:58:14, skipping insertion in model container [2024-11-14 03:58:14,238 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:58:14" (3/3) ... [2024-11-14 03:58:14,240 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label42+token_ring.04.cil-2.c [2024-11-14 03:58:14,262 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 03:58:14,265 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG Problem05_label42+token_ring.04.cil-2.c that has 8 procedures, 1754 locations, 1 initial locations, 8 loop locations, and 2 error locations. [2024-11-14 03:58:14,417 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 03:58:14,437 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;@f8b0847, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 03:58:14,437 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-14 03:58:14,455 INFO L276 IsEmpty]: Start isEmpty. Operand has 1754 states, 1724 states have (on average 1.9698375870069607) internal successors, (3396), 1729 states have internal predecessors, (3396), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2024-11-14 03:58:14,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-14 03:58:14,470 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:58:14,471 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] [2024-11-14 03:58:14,471 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:58:14,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:58:14,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1860080840, now seen corresponding path program 1 times [2024-11-14 03:58:14,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:58:14,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695053702] [2024-11-14 03:58:14,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:58:14,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:58:14,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:15,087 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 03:58:15,087 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:58:15,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695053702] [2024-11-14 03:58:15,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695053702] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:58:15,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:58:15,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 03:58:15,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476023927] [2024-11-14 03:58:15,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:58:15,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:58:15,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:58:15,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:58:15,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:58:15,147 INFO L87 Difference]: Start difference. First operand has 1754 states, 1724 states have (on average 1.9698375870069607) internal successors, (3396), 1729 states have internal predecessors, (3396), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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 03:58:16,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:58:16,679 INFO L93 Difference]: Finished difference Result 3595 states and 7014 transitions. [2024-11-14 03:58:16,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:58:16,682 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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 44 [2024-11-14 03:58:16,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:58:16,709 INFO L225 Difference]: With dead ends: 3595 [2024-11-14 03:58:16,709 INFO L226 Difference]: Without dead ends: 1840 [2024-11-14 03:58:16,722 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 03:58:16,727 INFO L432 NwaCegarLoop]: 3288 mSDtfsCounter, 3533 mSDsluCounter, 3220 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3533 SdHoareTripleChecker+Valid, 6508 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:58:16,728 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3533 Valid, 6508 Invalid, 616 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [14 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-14 03:58:16,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2024-11-14 03:58:16,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 1839. [2024-11-14 03:58:16,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1839 states, 1791 states have (on average 1.9430485762144054) internal successors, (3480), 1795 states have internal predecessors, (3480), 34 states have call successors, (34), 13 states have call predecessors, (34), 12 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-14 03:58:16,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1839 states to 1839 states and 3546 transitions. [2024-11-14 03:58:16,922 INFO L78 Accepts]: Start accepts. Automaton has 1839 states and 3546 transitions. Word has length 44 [2024-11-14 03:58:16,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:58:16,923 INFO L471 AbstractCegarLoop]: Abstraction has 1839 states and 3546 transitions. [2024-11-14 03:58:16,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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 03:58:16,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1839 states and 3546 transitions. [2024-11-14 03:58:16,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-14 03:58:16,931 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:58:16,931 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:58:16,931 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 03:58:16,932 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:58:16,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:58:16,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1057731784, now seen corresponding path program 1 times [2024-11-14 03:58:16,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:58:16,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247117559] [2024-11-14 03:58:16,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:58:16,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:58:16,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:17,368 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:58:17,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:58:17,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247117559] [2024-11-14 03:58:17,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247117559] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:58:17,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293841154] [2024-11-14 03:58:17,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:58:17,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:58:17,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:58:17,373 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:58:17,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 03:58:17,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:17,585 INFO L255 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:58:17,593 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:58:17,683 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 03:58:17,683 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:58:17,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293841154] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:58:17,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:58:17,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:58:17,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025630451] [2024-11-14 03:58:17,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:58:17,688 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:58:17,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:58:17,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:58:17,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:58:17,690 INFO L87 Difference]: Start difference. First operand 1839 states and 3546 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 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 03:58:18,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:58:18,404 INFO L93 Difference]: Finished difference Result 2218 states and 4089 transitions. [2024-11-14 03:58:18,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:58:18,405 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 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 82 [2024-11-14 03:58:18,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:58:18,419 INFO L225 Difference]: With dead ends: 2218 [2024-11-14 03:58:18,420 INFO L226 Difference]: Without dead ends: 2025 [2024-11-14 03:58:18,422 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 82 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 03:58:18,423 INFO L432 NwaCegarLoop]: 3225 mSDtfsCounter, 3394 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3394 SdHoareTripleChecker+Valid, 3342 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:58:18,423 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3394 Valid, 3342 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:58:18,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2025 states. [2024-11-14 03:58:18,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2025 to 2019. [2024-11-14 03:58:18,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2019 states, 1933 states have (on average 1.9022245214692188) internal successors, (3677), 1938 states have internal predecessors, (3677), 60 states have call successors, (60), 25 states have call predecessors, (60), 24 states have return successors, (58), 56 states have call predecessors, (58), 58 states have call successors, (58) [2024-11-14 03:58:18,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2019 states to 2019 states and 3795 transitions. [2024-11-14 03:58:18,538 INFO L78 Accepts]: Start accepts. Automaton has 2019 states and 3795 transitions. Word has length 82 [2024-11-14 03:58:18,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:58:18,538 INFO L471 AbstractCegarLoop]: Abstraction has 2019 states and 3795 transitions. [2024-11-14 03:58:18,539 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 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 03:58:18,539 INFO L276 IsEmpty]: Start isEmpty. Operand 2019 states and 3795 transitions. [2024-11-14 03:58:18,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-14 03:58:18,546 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:58:18,546 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:58:18,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-14 03:58:18,751 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:58:18,751 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:58:18,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:58:18,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1905783016, now seen corresponding path program 1 times [2024-11-14 03:58:18,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:58:18,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535870984] [2024-11-14 03:58:18,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:58:18,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:58:18,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:19,063 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:58:19,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:58:19,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535870984] [2024-11-14 03:58:19,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535870984] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:58:19,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208062083] [2024-11-14 03:58:19,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:58:19,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:58:19,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:58:19,068 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:58:19,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 03:58:19,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:19,247 INFO L255 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:58:19,251 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:58:19,314 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 03:58:19,314 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:58:19,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208062083] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:58:19,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:58:19,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:58:19,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693566072] [2024-11-14 03:58:19,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:58:19,315 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:58:19,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:58:19,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:58:19,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:58:19,316 INFO L87 Difference]: Start difference. First operand 2019 states and 3795 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 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 03:58:20,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:58:20,046 INFO L93 Difference]: Finished difference Result 2752 states and 4838 transitions. [2024-11-14 03:58:20,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:58:20,047 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 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 82 [2024-11-14 03:58:20,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:58:20,067 INFO L225 Difference]: With dead ends: 2752 [2024-11-14 03:58:20,067 INFO L226 Difference]: Without dead ends: 2379 [2024-11-14 03:58:20,070 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 82 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 03:58:20,073 INFO L432 NwaCegarLoop]: 3181 mSDtfsCounter, 3397 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3397 SdHoareTripleChecker+Valid, 3298 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:58:20,073 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3397 Valid, 3298 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:58:20,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2379 states. [2024-11-14 03:58:20,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2379 to 2371. [2024-11-14 03:58:20,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2371 states, 2211 states have (on average 1.835820895522388) internal successors, (4059), 2218 states have internal predecessors, (4059), 110 states have call successors, (110), 49 states have call predecessors, (110), 48 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) [2024-11-14 03:58:20,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2371 states to 2371 states and 4277 transitions. [2024-11-14 03:58:20,208 INFO L78 Accepts]: Start accepts. Automaton has 2371 states and 4277 transitions. Word has length 82 [2024-11-14 03:58:20,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:58:20,210 INFO L471 AbstractCegarLoop]: Abstraction has 2371 states and 4277 transitions. [2024-11-14 03:58:20,210 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 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 03:58:20,210 INFO L276 IsEmpty]: Start isEmpty. Operand 2371 states and 4277 transitions. [2024-11-14 03:58:20,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-14 03:58:20,214 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:58:20,214 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:58:20,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 03:58:20,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:58:20,415 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:58:20,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:58:20,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1092566840, now seen corresponding path program 1 times [2024-11-14 03:58:20,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:58:20,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034435919] [2024-11-14 03:58:20,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:58:20,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:58:20,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:20,637 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-14 03:58:20,637 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:58:20,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034435919] [2024-11-14 03:58:20,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034435919] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:58:20,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:58:20,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:58:20,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987586046] [2024-11-14 03:58:20,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:58:20,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:58:20,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:58:20,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:58:20,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:58:20,639 INFO L87 Difference]: Start difference. First operand 2371 states and 4277 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 03:58:21,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:58:21,481 INFO L93 Difference]: Finished difference Result 2947 states and 5092 transitions. [2024-11-14 03:58:21,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:58:21,481 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 82 [2024-11-14 03:58:21,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:58:21,500 INFO L225 Difference]: With dead ends: 2947 [2024-11-14 03:58:21,501 INFO L226 Difference]: Without dead ends: 2567 [2024-11-14 03:58:21,503 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 03:58:21,506 INFO L432 NwaCegarLoop]: 3245 mSDtfsCounter, 59 mSDsluCounter, 3186 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 6431 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:58:21,507 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 6431 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:58:21,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2567 states. [2024-11-14 03:58:21,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2567 to 2495. [2024-11-14 03:58:21,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2495 states, 2327 states have (on average 1.821658788139235) internal successors, (4239), 2334 states have internal predecessors, (4239), 114 states have call successors, (114), 53 states have call predecessors, (114), 52 states have return successors, (112), 108 states have call predecessors, (112), 112 states have call successors, (112) [2024-11-14 03:58:21,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2495 states to 2495 states and 4465 transitions. [2024-11-14 03:58:21,640 INFO L78 Accepts]: Start accepts. Automaton has 2495 states and 4465 transitions. Word has length 82 [2024-11-14 03:58:21,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:58:21,640 INFO L471 AbstractCegarLoop]: Abstraction has 2495 states and 4465 transitions. [2024-11-14 03:58:21,641 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 03:58:21,641 INFO L276 IsEmpty]: Start isEmpty. Operand 2495 states and 4465 transitions. [2024-11-14 03:58:21,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-11-14 03:58:21,646 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:58:21,651 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-14 03:58:21,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 03:58:21,651 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:58:21,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:58:21,652 INFO L85 PathProgramCache]: Analyzing trace with hash -239109976, now seen corresponding path program 1 times [2024-11-14 03:58:21,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:58:21,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332615919] [2024-11-14 03:58:21,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:58:21,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:58:21,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:21,787 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-14 03:58:21,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:58:21,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332615919] [2024-11-14 03:58:21,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332615919] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:58:21,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:58:21,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:58:21,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428978312] [2024-11-14 03:58:21,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:58:21,788 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:58:21,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:58:21,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:58:21,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:58:21,790 INFO L87 Difference]: Start difference. First operand 2495 states and 4465 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (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 03:58:22,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:58:22,502 INFO L93 Difference]: Finished difference Result 4156 states and 6826 transitions. [2024-11-14 03:58:22,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:58:22,503 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (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 109 [2024-11-14 03:58:22,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:58:22,524 INFO L225 Difference]: With dead ends: 4156 [2024-11-14 03:58:22,524 INFO L226 Difference]: Without dead ends: 3307 [2024-11-14 03:58:22,528 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 03:58:22,529 INFO L432 NwaCegarLoop]: 3195 mSDtfsCounter, 3387 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3387 SdHoareTripleChecker+Valid, 3312 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:58:22,529 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3387 Valid, 3312 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:58:22,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3307 states. [2024-11-14 03:58:22,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3307 to 3291. [2024-11-14 03:58:22,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3291 states, 2971 states have (on average 1.7256815886906764) internal successors, (5127), 2982 states have internal predecessors, (5127), 214 states have call successors, (214), 105 states have call predecessors, (214), 104 states have return successors, (212), 204 states have call predecessors, (212), 212 states have call successors, (212) [2024-11-14 03:58:22,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3291 states to 3291 states and 5553 transitions. [2024-11-14 03:58:22,699 INFO L78 Accepts]: Start accepts. Automaton has 3291 states and 5553 transitions. Word has length 109 [2024-11-14 03:58:22,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:58:22,699 INFO L471 AbstractCegarLoop]: Abstraction has 3291 states and 5553 transitions. [2024-11-14 03:58:22,699 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (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 03:58:22,700 INFO L276 IsEmpty]: Start isEmpty. Operand 3291 states and 5553 transitions. [2024-11-14 03:58:22,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-11-14 03:58:22,708 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:58:22,708 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-14 03:58:22,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 03:58:22,708 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:58:22,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:58:22,709 INFO L85 PathProgramCache]: Analyzing trace with hash 743960750, now seen corresponding path program 1 times [2024-11-14 03:58:22,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:58:22,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251506800] [2024-11-14 03:58:22,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:58:22,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:58:22,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:22,861 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-14 03:58:22,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:58:22,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251506800] [2024-11-14 03:58:22,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251506800] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:58:22,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:58:22,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:58:22,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779742302] [2024-11-14 03:58:22,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:58:22,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:58:22,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:58:22,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:58:22,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:58:22,863 INFO L87 Difference]: Start difference. First operand 3291 states and 5553 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (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 03:58:23,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:58:23,702 INFO L93 Difference]: Finished difference Result 6508 states and 10066 transitions. [2024-11-14 03:58:23,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:58:23,703 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (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 109 [2024-11-14 03:58:23,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:58:23,742 INFO L225 Difference]: With dead ends: 6508 [2024-11-14 03:58:23,743 INFO L226 Difference]: Without dead ends: 4863 [2024-11-14 03:58:23,752 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 03:58:23,754 INFO L432 NwaCegarLoop]: 3208 mSDtfsCounter, 3390 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3390 SdHoareTripleChecker+Valid, 3325 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:58:23,754 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3390 Valid, 3325 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:58:23,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4863 states. [2024-11-14 03:58:24,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4863 to 4835. [2024-11-14 03:58:24,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4835 states, 4219 states have (on average 1.617207869163309) internal successors, (6823), 4238 states have internal predecessors, (6823), 406 states have call successors, (406), 209 states have call predecessors, (406), 208 states have return successors, (404), 388 states have call predecessors, (404), 404 states have call successors, (404) [2024-11-14 03:58:24,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4835 states to 4835 states and 7633 transitions. [2024-11-14 03:58:24,145 INFO L78 Accepts]: Start accepts. Automaton has 4835 states and 7633 transitions. Word has length 109 [2024-11-14 03:58:24,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:58:24,146 INFO L471 AbstractCegarLoop]: Abstraction has 4835 states and 7633 transitions. [2024-11-14 03:58:24,147 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (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 03:58:24,147 INFO L276 IsEmpty]: Start isEmpty. Operand 4835 states and 7633 transitions. [2024-11-14 03:58:24,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-14 03:58:24,165 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:58:24,167 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:58:24,168 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-14 03:58:24,168 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:58:24,168 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:58:24,169 INFO L85 PathProgramCache]: Analyzing trace with hash 35219916, now seen corresponding path program 1 times [2024-11-14 03:58:24,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:58:24,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060619984] [2024-11-14 03:58:24,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:58:24,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:58:24,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:24,573 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-14 03:58:24,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:58:24,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060619984] [2024-11-14 03:58:24,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060619984] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:58:24,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037494794] [2024-11-14 03:58:24,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:58:24,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:58:24,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:58:24,577 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:58:24,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 03:58:24,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:24,839 INFO L255 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:58:24,848 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:58:24,910 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-14 03:58:24,910 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:58:24,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037494794] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:58:24,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:58:24,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-14 03:58:24,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306316099] [2024-11-14 03:58:24,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:58:24,911 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:58:24,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:58:24,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:58:24,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:58:24,915 INFO L87 Difference]: Start difference. First operand 4835 states and 7633 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 03:58:25,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:58:25,982 INFO L93 Difference]: Finished difference Result 7523 states and 11415 transitions. [2024-11-14 03:58:25,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:58:25,983 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 124 [2024-11-14 03:58:25,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:58:26,042 INFO L225 Difference]: With dead ends: 7523 [2024-11-14 03:58:26,043 INFO L226 Difference]: Without dead ends: 5879 [2024-11-14 03:58:26,053 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:58:26,054 INFO L432 NwaCegarLoop]: 3241 mSDtfsCounter, 74 mSDsluCounter, 3185 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 6426 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:58:26,056 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 6426 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:58:26,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5879 states. [2024-11-14 03:58:26,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5879 to 5467. [2024-11-14 03:58:26,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5467 states, 4803 states have (on average 1.6037892983551947) internal successors, (7703), 4822 states have internal predecessors, (7703), 430 states have call successors, (430), 233 states have call predecessors, (430), 232 states have return successors, (428), 412 states have call predecessors, (428), 428 states have call successors, (428) [2024-11-14 03:58:26,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5467 states to 5467 states and 8561 transitions. [2024-11-14 03:58:26,557 INFO L78 Accepts]: Start accepts. Automaton has 5467 states and 8561 transitions. Word has length 124 [2024-11-14 03:58:26,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:58:26,557 INFO L471 AbstractCegarLoop]: Abstraction has 5467 states and 8561 transitions. [2024-11-14 03:58:26,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 03:58:26,558 INFO L276 IsEmpty]: Start isEmpty. Operand 5467 states and 8561 transitions. [2024-11-14 03:58:26,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-14 03:58:26,578 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:58:26,578 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-14 03:58:26,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 03:58:26,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-14 03:58:26,779 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:58:26,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:58:26,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1985663524, now seen corresponding path program 1 times [2024-11-14 03:58:26,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:58:26,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625226493] [2024-11-14 03:58:26,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:58:26,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:58:26,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:26,985 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-14 03:58:26,985 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:58:26,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625226493] [2024-11-14 03:58:26,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625226493] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:58:26,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874105318] [2024-11-14 03:58:26,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:58:26,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:58:26,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:58:26,989 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:58:26,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 03:58:27,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:27,204 INFO L255 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:58:27,209 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:58:27,259 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-14 03:58:27,259 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:58:27,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874105318] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:58:27,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:58:27,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-14 03:58:27,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093909927] [2024-11-14 03:58:27,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:58:27,261 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:58:27,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:58:27,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:58:27,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:58:27,262 INFO L87 Difference]: Start difference. First operand 5467 states and 8561 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 03:58:28,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:58:28,361 INFO L93 Difference]: Finished difference Result 8839 states and 13307 transitions. [2024-11-14 03:58:28,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:58:28,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 124 [2024-11-14 03:58:28,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:58:28,407 INFO L225 Difference]: With dead ends: 8839 [2024-11-14 03:58:28,407 INFO L226 Difference]: Without dead ends: 6885 [2024-11-14 03:58:28,417 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:58:28,418 INFO L432 NwaCegarLoop]: 3270 mSDtfsCounter, 86 mSDsluCounter, 3187 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 6457 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:58:28,418 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 6457 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:58:28,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6885 states. [2024-11-14 03:58:28,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6885 to 6361. [2024-11-14 03:58:28,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6361 states, 5625 states have (on average 1.5848888888888888) internal successors, (8915), 5644 states have internal predecessors, (8915), 466 states have call successors, (466), 269 states have call predecessors, (466), 268 states have return successors, (464), 448 states have call predecessors, (464), 464 states have call successors, (464) [2024-11-14 03:58:28,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6361 states to 6361 states and 9845 transitions. [2024-11-14 03:58:28,963 INFO L78 Accepts]: Start accepts. Automaton has 6361 states and 9845 transitions. Word has length 124 [2024-11-14 03:58:28,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:58:28,964 INFO L471 AbstractCegarLoop]: Abstraction has 6361 states and 9845 transitions. [2024-11-14 03:58:28,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 03:58:28,965 INFO L276 IsEmpty]: Start isEmpty. Operand 6361 states and 9845 transitions. [2024-11-14 03:58:28,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-14 03:58:28,988 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:58:28,988 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:58:29,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 03:58:29,189 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:58:29,189 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:58:29,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:58:29,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1625744745, now seen corresponding path program 1 times [2024-11-14 03:58:29,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:58:29,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244524367] [2024-11-14 03:58:29,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:58:29,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:58:29,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:29,464 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-14 03:58:29,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:58:29,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244524367] [2024-11-14 03:58:29,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244524367] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:58:29,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924829432] [2024-11-14 03:58:29,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:58:29,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:58:29,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:58:29,469 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:58:29,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 03:58:29,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:29,692 INFO L255 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:58:29,698 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:58:29,758 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-14 03:58:29,758 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:58:29,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924829432] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:58:29,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:58:29,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-14 03:58:29,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620008046] [2024-11-14 03:58:29,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:58:29,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:58:29,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:58:29,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:58:29,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:58:29,761 INFO L87 Difference]: Start difference. First operand 6361 states and 9845 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 03:58:30,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:58:30,887 INFO L93 Difference]: Finished difference Result 10683 states and 15965 transitions. [2024-11-14 03:58:30,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:58:30,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 124 [2024-11-14 03:58:30,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:58:30,937 INFO L225 Difference]: With dead ends: 10683 [2024-11-14 03:58:30,937 INFO L226 Difference]: Without dead ends: 8246 [2024-11-14 03:58:30,950 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:58:30,950 INFO L432 NwaCegarLoop]: 3275 mSDtfsCounter, 92 mSDsluCounter, 3187 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 6462 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:58:30,951 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 6462 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:58:30,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8246 states. [2024-11-14 03:58:31,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8246 to 7666. [2024-11-14 03:58:31,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7666 states, 6822 states have (on average 1.562738199941366) internal successors, (10661), 6841 states have internal predecessors, (10661), 520 states have call successors, (520), 323 states have call predecessors, (520), 322 states have return successors, (518), 502 states have call predecessors, (518), 518 states have call successors, (518) [2024-11-14 03:58:31,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7666 states to 7666 states and 11699 transitions. [2024-11-14 03:58:31,387 INFO L78 Accepts]: Start accepts. Automaton has 7666 states and 11699 transitions. Word has length 124 [2024-11-14 03:58:31,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:58:31,387 INFO L471 AbstractCegarLoop]: Abstraction has 7666 states and 11699 transitions. [2024-11-14 03:58:31,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 03:58:31,388 INFO L276 IsEmpty]: Start isEmpty. Operand 7666 states and 11699 transitions. [2024-11-14 03:58:31,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-14 03:58:31,408 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:58:31,408 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-14 03:58:31,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-14 03:58:31,609 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:58:31,609 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:58:31,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:58:31,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1946603765, now seen corresponding path program 1 times [2024-11-14 03:58:31,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:58:31,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920585756] [2024-11-14 03:58:31,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:58:31,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:58:31,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:31,787 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-14 03:58:31,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:58:31,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920585756] [2024-11-14 03:58:31,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920585756] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:58:31,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94621437] [2024-11-14 03:58:31,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:58:31,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:58:31,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:58:31,791 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:58:31,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 03:58:31,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:31,944 INFO L255 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:58:31,946 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:58:31,983 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-14 03:58:31,983 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:58:31,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94621437] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:58:31,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:58:31,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-14 03:58:31,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27938179] [2024-11-14 03:58:31,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:58:31,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:58:31,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:58:31,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:58:31,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:58:31,988 INFO L87 Difference]: Start difference. First operand 7666 states and 11699 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 03:58:32,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:58:32,772 INFO L93 Difference]: Finished difference Result 13046 states and 19286 transitions. [2024-11-14 03:58:32,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:58:32,773 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 124 [2024-11-14 03:58:32,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:58:32,813 INFO L225 Difference]: With dead ends: 13046 [2024-11-14 03:58:32,814 INFO L226 Difference]: Without dead ends: 9970 [2024-11-14 03:58:32,824 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:58:32,824 INFO L432 NwaCegarLoop]: 3265 mSDtfsCounter, 80 mSDsluCounter, 3187 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 6452 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:58:32,825 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 6452 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 03:58:32,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9970 states. [2024-11-14 03:58:33,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9970 to 9502. [2024-11-14 03:58:33,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9502 states, 8496 states have (on average 1.5344868173258004) internal successors, (13037), 8515 states have internal predecessors, (13037), 601 states have call successors, (601), 404 states have call predecessors, (601), 403 states have return successors, (599), 583 states have call predecessors, (599), 599 states have call successors, (599) [2024-11-14 03:58:33,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9502 states to 9502 states and 14237 transitions. [2024-11-14 03:58:33,173 INFO L78 Accepts]: Start accepts. Automaton has 9502 states and 14237 transitions. Word has length 124 [2024-11-14 03:58:33,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:58:33,174 INFO L471 AbstractCegarLoop]: Abstraction has 9502 states and 14237 transitions. [2024-11-14 03:58:33,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 03:58:33,174 INFO L276 IsEmpty]: Start isEmpty. Operand 9502 states and 14237 transitions. [2024-11-14 03:58:33,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-14 03:58:33,195 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:58:33,195 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:58:33,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 03:58:33,396 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:58:33,396 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:58:33,397 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:58:33,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1616621272, now seen corresponding path program 2 times [2024-11-14 03:58:33,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:58:33,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359697027] [2024-11-14 03:58:33,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:58:33,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:58:33,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:33,734 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-14 03:58:33,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:58:33,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359697027] [2024-11-14 03:58:33,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359697027] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:58:33,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005639170] [2024-11-14 03:58:33,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:58:33,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:58:33,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:58:33,737 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:58:33,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 03:58:33,885 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 03:58:33,886 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:58:33,887 INFO L255 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 03:58:33,890 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:58:33,916 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-14 03:58:33,916 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:58:33,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005639170] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:58:33,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:58:33,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-14 03:58:33,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538550786] [2024-11-14 03:58:33,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:58:33,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:58:33,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:58:33,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:58:33,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:58:33,918 INFO L87 Difference]: Start difference. First operand 9502 states and 14237 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 03:58:34,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:58:34,724 INFO L93 Difference]: Finished difference Result 14488 states and 21347 transitions. [2024-11-14 03:58:34,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:58:34,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 124 [2024-11-14 03:58:34,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:58:34,758 INFO L225 Difference]: With dead ends: 14488 [2024-11-14 03:58:34,758 INFO L226 Difference]: Without dead ends: 9522 [2024-11-14 03:58:34,767 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 126 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 03:58:34,768 INFO L432 NwaCegarLoop]: 3269 mSDtfsCounter, 133 mSDsluCounter, 3175 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 6444 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:58:34,768 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 6444 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:58:34,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9522 states. [2024-11-14 03:58:35,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9522 to 9372. [2024-11-14 03:58:35,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9372 states, 8366 states have (on average 1.5215156586182166) internal successors, (12729), 8385 states have internal predecessors, (12729), 601 states have call successors, (601), 404 states have call predecessors, (601), 403 states have return successors, (599), 583 states have call predecessors, (599), 599 states have call successors, (599) [2024-11-14 03:58:35,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9372 states to 9372 states and 13929 transitions. [2024-11-14 03:58:35,099 INFO L78 Accepts]: Start accepts. Automaton has 9372 states and 13929 transitions. Word has length 124 [2024-11-14 03:58:35,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:58:35,099 INFO L471 AbstractCegarLoop]: Abstraction has 9372 states and 13929 transitions. [2024-11-14 03:58:35,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 03:58:35,100 INFO L276 IsEmpty]: Start isEmpty. Operand 9372 states and 13929 transitions. [2024-11-14 03:58:35,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-14 03:58:35,116 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:58:35,117 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-14 03:58:35,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-14 03:58:35,318 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:58:35,318 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:58:35,318 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:58:35,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1425545626, now seen corresponding path program 1 times [2024-11-14 03:58:35,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:58:35,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585401507] [2024-11-14 03:58:35,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:58:35,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:58:35,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:35,574 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-14 03:58:35,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:58:35,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585401507] [2024-11-14 03:58:35,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585401507] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:58:35,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983480927] [2024-11-14 03:58:35,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:58:35,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:58:35,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:58:35,577 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:58:35,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 03:58:35,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:35,733 INFO L255 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:58:35,735 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:58:35,774 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-14 03:58:35,774 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:58:35,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983480927] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:58:35,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:58:35,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-14 03:58:35,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278907954] [2024-11-14 03:58:35,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:58:35,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:58:35,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:58:35,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:58:35,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:58:35,777 INFO L87 Difference]: Start difference. First operand 9372 states and 13929 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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 03:58:36,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:58:36,564 INFO L93 Difference]: Finished difference Result 14234 states and 20611 transitions. [2024-11-14 03:58:36,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:58:36,565 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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 124 [2024-11-14 03:58:36,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:58:36,609 INFO L225 Difference]: With dead ends: 14234 [2024-11-14 03:58:36,610 INFO L226 Difference]: Without dead ends: 10086 [2024-11-14 03:58:36,621 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 126 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 03:58:36,622 INFO L432 NwaCegarLoop]: 3197 mSDtfsCounter, 3399 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3399 SdHoareTripleChecker+Valid, 3226 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:58:36,623 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3399 Valid, 3226 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 03:58:36,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10086 states. [2024-11-14 03:58:37,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10086 to 10086. [2024-11-14 03:58:37,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10086 states, 8988 states have (on average 1.4978860703159769) internal successors, (13463), 9007 states have internal predecessors, (13463), 631 states have call successors, (631), 466 states have call predecessors, (631), 465 states have return successors, (629), 613 states have call predecessors, (629), 629 states have call successors, (629) [2024-11-14 03:58:37,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10086 states to 10086 states and 14723 transitions. [2024-11-14 03:58:37,064 INFO L78 Accepts]: Start accepts. Automaton has 10086 states and 14723 transitions. Word has length 124 [2024-11-14 03:58:37,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:58:37,065 INFO L471 AbstractCegarLoop]: Abstraction has 10086 states and 14723 transitions. [2024-11-14 03:58:37,065 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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 03:58:37,066 INFO L276 IsEmpty]: Start isEmpty. Operand 10086 states and 14723 transitions. [2024-11-14 03:58:37,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-14 03:58:37,092 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:58:37,093 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-14 03:58:37,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-14 03:58:37,296 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:58:37,297 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:58:37,297 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:58:37,297 INFO L85 PathProgramCache]: Analyzing trace with hash -621679151, now seen corresponding path program 2 times [2024-11-14 03:58:37,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:58:37,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723249546] [2024-11-14 03:58:37,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:58:37,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:58:37,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:37,591 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-14 03:58:37,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:58:37,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723249546] [2024-11-14 03:58:37,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723249546] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:58:37,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962904239] [2024-11-14 03:58:37,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:58:37,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:58:37,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:58:37,594 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:58:37,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 03:58:37,768 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 03:58:37,769 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:58:37,771 INFO L255 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-14 03:58:37,777 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:58:38,044 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 57 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 03:58:38,045 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:58:38,486 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-14 03:58:38,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962904239] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:58:38,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [275782617] [2024-11-14 03:58:38,523 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2024-11-14 03:58:38,524 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:58:38,527 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:58:38,532 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:58:38,533 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:58:47,646 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 139 for LOIs [2024-11-14 03:58:47,777 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2024-11-14 03:58:48,406 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2024-11-14 04:00:11,499 WARN L286 SmtUtils]: Spent 1.36m on a formula simplification that was a NOOP. DAG size: 1128 (called from [L 210] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2024-11-14 04:01:33,177 WARN L286 SmtUtils]: Spent 1.36m on a formula simplification that was a NOOP. DAG size: 1128 (called from [L 210] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2024-11-14 04:01:33,194 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 139 for LOIs [2024-11-14 04:01:33,266 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 119 for LOIs [2024-11-14 04:01:33,289 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 72 for LOIs [2024-11-14 04:01:33,332 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 101 for LOIs [2024-11-14 04:01:33,579 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 176 for LOIs [2024-11-14 04:01:35,846 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:07:51,090 WARN L286 SmtUtils]: Spent 6.00m on a formula simplification. DAG size of input: 1128 DAG size of output: 64 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 04:07:59,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [275782617] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:07:59,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:07:59,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [6, 7, 6] total 46 [2024-11-14 04:07:59,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023244979] [2024-11-14 04:07:59,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:07:59,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-14 04:07:59,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:07:59,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-14 04:07:59,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=1765, Unknown=0, NotChecked=0, Total=2070 [2024-11-14 04:07:59,499 INFO L87 Difference]: Start difference. First operand 10086 states and 14723 transitions. Second operand has 35 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 26 states have internal predecessors, (55), 7 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-14 04:08:54,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:08:54,903 INFO L93 Difference]: Finished difference Result 19392 states and 27287 transitions. [2024-11-14 04:08:54,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2024-11-14 04:08:54,903 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 26 states have internal predecessors, (55), 7 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 124 [2024-11-14 04:08:54,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:08:54,946 INFO L225 Difference]: With dead ends: 19392 [2024-11-14 04:08:54,946 INFO L226 Difference]: Without dead ends: 10862 [2024-11-14 04:08:54,965 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 302 SyntacticMatches, 36 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4899 ImplicationChecksByTransitivity, 409.5s TimeCoverageRelationStatistics Valid=1448, Invalid=11892, Unknown=0, NotChecked=0, Total=13340 [2024-11-14 04:08:54,966 INFO L432 NwaCegarLoop]: 3288 mSDtfsCounter, 948 mSDsluCounter, 2040 mSDsCounter, 0 mSdLazyCounter, 17379 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 961 SdHoareTripleChecker+Valid, 5328 SdHoareTripleChecker+Invalid, 17660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 17379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:08:54,966 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [961 Valid, 5328 Invalid, 17660 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [281 Valid, 17379 Invalid, 0 Unknown, 0 Unchecked, 28.5s Time] [2024-11-14 04:08:54,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10862 states. [2024-11-14 04:08:55,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10862 to 10537. [2024-11-14 04:08:55,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10537 states, 9354 states have (on average 1.4868505452212957) internal successors, (13908), 9373 states have internal predecessors, (13908), 677 states have call successors, (677), 506 states have call predecessors, (677), 504 states have return successors, (677), 658 states have call predecessors, (677), 675 states have call successors, (677) [2024-11-14 04:08:55,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10537 states to 10537 states and 15262 transitions. [2024-11-14 04:08:55,619 INFO L78 Accepts]: Start accepts. Automaton has 10537 states and 15262 transitions. Word has length 124 [2024-11-14 04:08:55,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:08:55,622 INFO L471 AbstractCegarLoop]: Abstraction has 10537 states and 15262 transitions. [2024-11-14 04:08:55,622 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 26 states have internal predecessors, (55), 7 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-14 04:08:55,622 INFO L276 IsEmpty]: Start isEmpty. Operand 10537 states and 15262 transitions. [2024-11-14 04:08:55,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2024-11-14 04:08:55,643 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:08:55,643 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-14 04:08:55,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 04:08:55,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:08:55,845 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:08:55,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:08:55,846 INFO L85 PathProgramCache]: Analyzing trace with hash -796481683, now seen corresponding path program 1 times [2024-11-14 04:08:55,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:08:55,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917355342] [2024-11-14 04:08:55,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:08:55,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:08:55,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:08:56,114 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-14 04:08:56,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:08:56,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917355342] [2024-11-14 04:08:56,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917355342] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:08:56,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829211514] [2024-11-14 04:08:56,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:08:56,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:08:56,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:08:56,117 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:08:56,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 04:08:56,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:08:56,305 INFO L255 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 04:08:56,308 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:08:56,454 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 04:08:56,454 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:08:56,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829211514] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:08:56,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:08:56,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2024-11-14 04:08:56,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248367077] [2024-11-14 04:08:56,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:08:56,455 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:08:56,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:08:56,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:08:56,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-14 04:08:56,455 INFO L87 Difference]: Start difference. First operand 10537 states and 15262 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-14 04:08:57,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:08:57,773 INFO L93 Difference]: Finished difference Result 18420 states and 25967 transitions. [2024-11-14 04:08:57,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:08:57,774 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 127 [2024-11-14 04:08:57,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:08:57,814 INFO L225 Difference]: With dead ends: 18420 [2024-11-14 04:08:57,814 INFO L226 Difference]: Without dead ends: 13179 [2024-11-14 04:08:57,825 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-14 04:08:57,827 INFO L432 NwaCegarLoop]: 3269 mSDtfsCounter, 6750 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6750 SdHoareTripleChecker+Valid, 3390 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 04:08:57,827 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6750 Valid, 3390 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 04:08:57,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13179 states. [2024-11-14 04:08:58,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13179 to 12421. [2024-11-14 04:08:58,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12421 states, 11043 states have (on average 1.4581182649642308) internal successors, (16102), 11067 states have internal predecessors, (16102), 763 states have call successors, (763), 615 states have call predecessors, (763), 613 states have return successors, (796), 739 states have call predecessors, (796), 761 states have call successors, (796) [2024-11-14 04:08:58,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12421 states to 12421 states and 17661 transitions. [2024-11-14 04:08:58,620 INFO L78 Accepts]: Start accepts. Automaton has 12421 states and 17661 transitions. Word has length 127 [2024-11-14 04:08:58,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:08:58,621 INFO L471 AbstractCegarLoop]: Abstraction has 12421 states and 17661 transitions. [2024-11-14 04:08:58,621 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-14 04:08:58,621 INFO L276 IsEmpty]: Start isEmpty. Operand 12421 states and 17661 transitions. [2024-11-14 04:08:58,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-11-14 04:08:58,642 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:08:58,642 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:08:58,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 04:08:58,842 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-14 04:08:58,843 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:08:58,843 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:08:58,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1048775341, now seen corresponding path program 1 times [2024-11-14 04:08:58,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:08:58,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990520851] [2024-11-14 04:08:58,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:08:58,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:08:58,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:08:59,092 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 19 proven. 33 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-14 04:08:59,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:08:59,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990520851] [2024-11-14 04:08:59,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990520851] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:08:59,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300403877] [2024-11-14 04:08:59,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:08:59,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:08:59,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:08:59,095 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:08:59,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 04:08:59,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:08:59,265 INFO L255 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-14 04:08:59,268 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:08:59,365 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 04:08:59,365 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:08:59,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300403877] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:08:59,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:08:59,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-14 04:08:59,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577050571] [2024-11-14 04:08:59,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:08:59,367 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:08:59,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:08:59,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:08:59,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-14 04:08:59,367 INFO L87 Difference]: Start difference. First operand 12421 states and 17661 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-14 04:09:01,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:09:01,048 INFO L93 Difference]: Finished difference Result 21994 states and 30612 transitions. [2024-11-14 04:09:01,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 04:09:01,048 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 128 [2024-11-14 04:09:01,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:09:01,116 INFO L225 Difference]: With dead ends: 21994 [2024-11-14 04:09:01,116 INFO L226 Difference]: Without dead ends: 15259 [2024-11-14 04:09:01,133 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-14 04:09:01,134 INFO L432 NwaCegarLoop]: 3250 mSDtfsCounter, 107 mSDsluCounter, 6380 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 9630 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 04:09:01,134 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 9630 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 04:09:01,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15259 states. [2024-11-14 04:09:02,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15259 to 13904. [2024-11-14 04:09:02,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13904 states, 12205 states have (on average 1.4390823433019255) internal successors, (17564), 12216 states have internal predecessors, (17564), 967 states have call successors, (967), 753 states have call predecessors, (967), 730 states have return successors, (1038), 935 states have call predecessors, (1038), 965 states have call successors, (1038) [2024-11-14 04:09:02,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13904 states to 13904 states and 19569 transitions. [2024-11-14 04:09:02,199 INFO L78 Accepts]: Start accepts. Automaton has 13904 states and 19569 transitions. Word has length 128 [2024-11-14 04:09:02,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:09:02,199 INFO L471 AbstractCegarLoop]: Abstraction has 13904 states and 19569 transitions. [2024-11-14 04:09:02,199 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-14 04:09:02,200 INFO L276 IsEmpty]: Start isEmpty. Operand 13904 states and 19569 transitions. [2024-11-14 04:09:02,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-11-14 04:09:02,218 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:09:02,218 INFO L215 NwaCegarLoop]: trace histogram [5, 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, 1] [2024-11-14 04:09:02,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-14 04:09:02,422 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-14 04:09:02,423 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:09:02,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:09:02,423 INFO L85 PathProgramCache]: Analyzing trace with hash -2037304744, now seen corresponding path program 1 times [2024-11-14 04:09:02,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:09:02,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746222282] [2024-11-14 04:09:02,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:09:02,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:09:02,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:09:02,524 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-11-14 04:09:02,524 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:09:02,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746222282] [2024-11-14 04:09:02,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746222282] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:09:02,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:09:02,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 04:09:02,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748860850] [2024-11-14 04:09:02,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:09:02,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:09:02,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:09:02,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:09:02,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:09:02,527 INFO L87 Difference]: Start difference. First operand 13904 states and 19569 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-14 04:09:04,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:09:04,151 INFO L93 Difference]: Finished difference Result 21069 states and 29550 transitions. [2024-11-14 04:09:04,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:09:04,152 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 133 [2024-11-14 04:09:04,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:09:04,204 INFO L225 Difference]: With dead ends: 21069 [2024-11-14 04:09:04,204 INFO L226 Difference]: Without dead ends: 13932 [2024-11-14 04:09:04,220 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 04:09:04,221 INFO L432 NwaCegarLoop]: 3290 mSDtfsCounter, 3537 mSDsluCounter, 3224 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3537 SdHoareTripleChecker+Valid, 6514 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 04:09:04,221 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3537 Valid, 6514 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 04:09:04,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13932 states. [2024-11-14 04:09:05,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13932 to 13752. [2024-11-14 04:09:05,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13752 states, 12053 states have (on average 1.422799303078072) internal successors, (17149), 12064 states have internal predecessors, (17149), 967 states have call successors, (967), 753 states have call predecessors, (967), 730 states have return successors, (1038), 935 states have call predecessors, (1038), 965 states have call successors, (1038) [2024-11-14 04:09:05,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13752 states to 13752 states and 19154 transitions. [2024-11-14 04:09:05,195 INFO L78 Accepts]: Start accepts. Automaton has 13752 states and 19154 transitions. Word has length 133 [2024-11-14 04:09:05,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:09:05,196 INFO L471 AbstractCegarLoop]: Abstraction has 13752 states and 19154 transitions. [2024-11-14 04:09:05,196 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-14 04:09:05,196 INFO L276 IsEmpty]: Start isEmpty. Operand 13752 states and 19154 transitions. [2024-11-14 04:09:05,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-11-14 04:09:05,212 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:09:05,212 INFO L215 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:09:05,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-14 04:09:05,212 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:09:05,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:09:05,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1338687929, now seen corresponding path program 1 times [2024-11-14 04:09:05,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:09:05,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826617778] [2024-11-14 04:09:05,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:09:05,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:09:05,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:09:05,535 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2024-11-14 04:09:05,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:09:05,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826617778] [2024-11-14 04:09:05,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826617778] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:09:05,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565118043] [2024-11-14 04:09:05,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:09:05,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:09:05,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:09:05,538 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:09:05,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 04:09:05,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:09:05,710 INFO L255 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-14 04:09:05,714 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:09:06,027 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 52 proven. 23 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 04:09:06,027 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:09:06,561 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 39 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2024-11-14 04:09:06,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565118043] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:09:06,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2092779988] [2024-11-14 04:09:06,565 INFO L159 IcfgInterpreter]: Started Sifa with 76 locations of interest [2024-11-14 04:09:06,565 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:09:06,566 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:09:06,566 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:09:06,566 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:09:29,318 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 65 for LOIs [2024-11-14 04:09:29,324 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 194 for LOIs [2024-11-14 04:09:29,845 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 155 for LOIs [2024-11-14 04:09:30,011 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 124 for LOIs [2024-11-14 04:09:30,086 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 56 for LOIs [2024-11-14 04:09:30,114 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 131 for LOIs [2024-11-14 04:09:30,807 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 1 for LOIs [2024-11-14 04:09:30,907 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:10:01,204 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '357001#(and (= ~a15~0 1) (= 5 ~a20~0) (<= 1 |#StackHeapBarrier|) (= ~t1_pc~0 0) (= ~t1_i~0 1) (= ~a25~0 1) (not (= ~token~0 (+ ~local~0 4))) (= ~a~0 1) (= ~d~0 4) (= 0 ~t3_pc~0) (= ~a16~0 1) (= 5 ~e~0) (= ~m_pc~0 1) (= ~m_i~0 1) (= ~a12~0 4) (= ~a9~0 18) (= 6 ~f~0) (= 3 ~c~0) (= ~t2_i~0 1) (= 2 ~b~0) (= 0 ~t2_pc~0) (= ~m_st~0 1) (= ~a27~0 1) (= ~t3_i~0 1) (= ~t4_i~0 1) (= ~a2~0 10))' at error location [2024-11-14 04:10:01,205 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:10:01,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:10:01,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 10] total 21 [2024-11-14 04:10:01,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865192728] [2024-11-14 04:10:01,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:10:01,206 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-14 04:10:01,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:10:01,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-14 04:10:01,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=4522, Unknown=0, NotChecked=0, Total=4970 [2024-11-14 04:10:01,209 INFO L87 Difference]: Start difference. First operand 13752 states and 19154 transitions. Second operand has 21 states, 14 states have (on average 14.571428571428571) internal successors, (204), 16 states have internal predecessors, (204), 10 states have call successors, (39), 9 states have call predecessors, (39), 12 states have return successors, (38), 10 states have call predecessors, (38), 10 states have call successors, (38) [2024-11-14 04:10:05,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:10:05,934 INFO L93 Difference]: Finished difference Result 35205 states and 47422 transitions. [2024-11-14 04:10:05,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-14 04:10:05,935 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 14 states have (on average 14.571428571428571) internal successors, (204), 16 states have internal predecessors, (204), 10 states have call successors, (39), 9 states have call predecessors, (39), 12 states have return successors, (38), 10 states have call predecessors, (38), 10 states have call successors, (38) Word has length 133 [2024-11-14 04:10:05,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:10:06,031 INFO L225 Difference]: With dead ends: 35205 [2024-11-14 04:10:06,032 INFO L226 Difference]: Without dead ends: 23270 [2024-11-14 04:10:06,065 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 349 SyntacticMatches, 8 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4034 ImplicationChecksByTransitivity, 31.3s TimeCoverageRelationStatistics Valid=1036, Invalid=9064, Unknown=0, NotChecked=0, Total=10100 [2024-11-14 04:10:06,066 INFO L432 NwaCegarLoop]: 3194 mSDtfsCounter, 11469 mSDsluCounter, 25360 mSDsCounter, 0 mSdLazyCounter, 3271 mSolverCounterSat, 569 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11469 SdHoareTripleChecker+Valid, 28554 SdHoareTripleChecker+Invalid, 3840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 569 IncrementalHoareTripleChecker+Valid, 3271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:10:06,067 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11469 Valid, 28554 Invalid, 3840 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [569 Valid, 3271 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-14 04:10:06,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23270 states. [2024-11-14 04:10:07,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23270 to 22127. [2024-11-14 04:10:07,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22127 states, 19258 states have (on average 1.3758438051718767) internal successors, (26496), 19286 states have internal predecessors, (26496), 1607 states have call successors, (1607), 1262 states have call predecessors, (1607), 1260 states have return successors, (1607), 1579 states have call predecessors, (1607), 1605 states have call successors, (1607) [2024-11-14 04:10:07,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22127 states to 22127 states and 29710 transitions. [2024-11-14 04:10:07,568 INFO L78 Accepts]: Start accepts. Automaton has 22127 states and 29710 transitions. Word has length 133 [2024-11-14 04:10:07,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:10:07,568 INFO L471 AbstractCegarLoop]: Abstraction has 22127 states and 29710 transitions. [2024-11-14 04:10:07,568 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 14 states have (on average 14.571428571428571) internal successors, (204), 16 states have internal predecessors, (204), 10 states have call successors, (39), 9 states have call predecessors, (39), 12 states have return successors, (38), 10 states have call predecessors, (38), 10 states have call successors, (38) [2024-11-14 04:10:07,569 INFO L276 IsEmpty]: Start isEmpty. Operand 22127 states and 29710 transitions. [2024-11-14 04:10:07,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-11-14 04:10:07,584 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:10:07,585 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:10:07,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-14 04:10:07,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-14 04:10:07,786 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:10:07,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:10:07,786 INFO L85 PathProgramCache]: Analyzing trace with hash -187445501, now seen corresponding path program 1 times [2024-11-14 04:10:07,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:10:07,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96501836] [2024-11-14 04:10:07,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:10:07,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:10:07,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:10:07,960 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-14 04:10:07,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:10:07,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96501836] [2024-11-14 04:10:07,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96501836] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:10:07,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983814198] [2024-11-14 04:10:07,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:10:07,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:10:07,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:10:07,963 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:10:07,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 04:10:08,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:10:08,127 INFO L255 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:10:08,130 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:10:08,170 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-14 04:10:08,170 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:10:08,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983814198] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:10:08,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:10:08,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2024-11-14 04:10:08,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066163447] [2024-11-14 04:10:08,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:10:08,171 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:10:08,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:10:08,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:10:08,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-14 04:10:08,172 INFO L87 Difference]: Start difference. First operand 22127 states and 29710 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-14 04:10:09,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:10:09,969 INFO L93 Difference]: Finished difference Result 31312 states and 41667 transitions. [2024-11-14 04:10:09,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:10:09,970 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 131 [2024-11-14 04:10:09,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:10:10,032 INFO L225 Difference]: With dead ends: 31312 [2024-11-14 04:10:10,032 INFO L226 Difference]: Without dead ends: 22604 [2024-11-14 04:10:10,054 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-14 04:10:10,055 INFO L432 NwaCegarLoop]: 3267 mSDtfsCounter, 3386 mSDsluCounter, 3385 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3386 SdHoareTripleChecker+Valid, 6652 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:10:10,055 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3386 Valid, 6652 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 04:10:10,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22604 states. [2024-11-14 04:10:11,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22604 to 22379. [2024-11-14 04:10:11,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22379 states, 19474 states have (on average 1.3738317757009346) internal successors, (26754), 19520 states have internal predecessors, (26754), 1607 states have call successors, (1607), 1262 states have call predecessors, (1607), 1296 states have return successors, (1643), 1597 states have call predecessors, (1643), 1605 states have call successors, (1643) [2024-11-14 04:10:11,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22379 states to 22379 states and 30004 transitions. [2024-11-14 04:10:11,212 INFO L78 Accepts]: Start accepts. Automaton has 22379 states and 30004 transitions. Word has length 131 [2024-11-14 04:10:11,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:10:11,212 INFO L471 AbstractCegarLoop]: Abstraction has 22379 states and 30004 transitions. [2024-11-14 04:10:11,212 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-14 04:10:11,212 INFO L276 IsEmpty]: Start isEmpty. Operand 22379 states and 30004 transitions. [2024-11-14 04:10:11,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-11-14 04:10:11,230 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:10:11,231 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:10:11,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-14 04:10:11,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-14 04:10:11,431 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:10:11,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:10:11,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1798732056, now seen corresponding path program 1 times [2024-11-14 04:10:11,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:10:11,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277920144] [2024-11-14 04:10:11,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:10:11,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:10:11,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:10:11,601 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-14 04:10:11,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:10:11,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277920144] [2024-11-14 04:10:11,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277920144] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:10:11,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250065738] [2024-11-14 04:10:11,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:10:11,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:10:11,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:10:11,604 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:10:11,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 04:10:11,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:10:11,757 INFO L255 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:10:11,760 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:10:11,783 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-14 04:10:11,783 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:10:11,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250065738] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:10:11,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:10:11,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-14 04:10:11,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496287072] [2024-11-14 04:10:11,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:10:11,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:10:11,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:10:11,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:10:11,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 04:10:11,785 INFO L87 Difference]: Start difference. First operand 22379 states and 30004 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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 04:10:13,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:10:13,260 INFO L93 Difference]: Finished difference Result 30863 states and 41061 transitions. [2024-11-14 04:10:13,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:10:13,261 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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 132 [2024-11-14 04:10:13,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:10:13,313 INFO L225 Difference]: With dead ends: 30863 [2024-11-14 04:10:13,313 INFO L226 Difference]: Without dead ends: 21652 [2024-11-14 04:10:13,331 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 134 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 04:10:13,331 INFO L432 NwaCegarLoop]: 3196 mSDtfsCounter, 27 mSDsluCounter, 3178 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 6374 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:10:13,332 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 6374 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 04:10:13,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21652 states. [2024-11-14 04:10:14,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21652 to 21169. [2024-11-14 04:10:14,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21169 states, 18408 states have (on average 1.3771729682746632) internal successors, (25351), 18430 states have internal predecessors, (25351), 1553 states have call successors, (1553), 1208 states have call predecessors, (1553), 1206 states have return successors, (1553), 1531 states have call predecessors, (1553), 1551 states have call successors, (1553) [2024-11-14 04:10:14,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21169 states to 21169 states and 28457 transitions. [2024-11-14 04:10:14,798 INFO L78 Accepts]: Start accepts. Automaton has 21169 states and 28457 transitions. Word has length 132 [2024-11-14 04:10:14,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:10:14,799 INFO L471 AbstractCegarLoop]: Abstraction has 21169 states and 28457 transitions. [2024-11-14 04:10:14,799 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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 04:10:14,799 INFO L276 IsEmpty]: Start isEmpty. Operand 21169 states and 28457 transitions. [2024-11-14 04:10:14,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-11-14 04:10:14,817 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:10:14,817 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:10:14,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-14 04:10:15,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:10:15,018 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:10:15,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:10:15,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1649305087, now seen corresponding path program 1 times [2024-11-14 04:10:15,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:10:15,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078853545] [2024-11-14 04:10:15,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:10:15,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:10:15,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:10:15,186 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 17 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-14 04:10:15,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:10:15,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078853545] [2024-11-14 04:10:15,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078853545] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:10:15,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783890635] [2024-11-14 04:10:15,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:10:15,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:10:15,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:10:15,189 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:10:15,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-14 04:10:15,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:10:15,351 INFO L255 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 04:10:15,354 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:10:15,431 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 04:10:15,431 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:10:15,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783890635] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:10:15,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:10:15,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-14 04:10:15,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394660409] [2024-11-14 04:10:15,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:10:15,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:10:15,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:10:15,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:10:15,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 04:10:15,432 INFO L87 Difference]: Start difference. First operand 21169 states and 28457 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-14 04:10:16,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:10:16,895 INFO L93 Difference]: Finished difference Result 35901 states and 47599 transitions. [2024-11-14 04:10:16,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:10:16,895 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 133 [2024-11-14 04:10:16,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:10:16,938 INFO L225 Difference]: With dead ends: 35901 [2024-11-14 04:10:16,938 INFO L226 Difference]: Without dead ends: 23091 [2024-11-14 04:10:16,956 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 135 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 04:10:16,957 INFO L432 NwaCegarLoop]: 3201 mSDtfsCounter, 3365 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3365 SdHoareTripleChecker+Valid, 3236 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:10:16,957 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3365 Valid, 3236 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:10:16,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23091 states. [2024-11-14 04:10:18,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23091 to 22812. [2024-11-14 04:10:18,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22812 states, 19914 states have (on average 1.3532690569448629) internal successors, (26949), 19936 states have internal predecessors, (26949), 1582 states have call successors, (1582), 1316 states have call predecessors, (1582), 1314 states have return successors, (1686), 1560 states have call predecessors, (1686), 1580 states have call successors, (1686) [2024-11-14 04:10:18,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22812 states to 22812 states and 30217 transitions. [2024-11-14 04:10:18,189 INFO L78 Accepts]: Start accepts. Automaton has 22812 states and 30217 transitions. Word has length 133 [2024-11-14 04:10:18,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:10:18,190 INFO L471 AbstractCegarLoop]: Abstraction has 22812 states and 30217 transitions. [2024-11-14 04:10:18,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-14 04:10:18,190 INFO L276 IsEmpty]: Start isEmpty. Operand 22812 states and 30217 transitions. [2024-11-14 04:10:18,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-11-14 04:10:18,204 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:10:18,205 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:10:18,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-14 04:10:18,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2024-11-14 04:10:18,405 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:10:18,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:10:18,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1436677141, now seen corresponding path program 1 times [2024-11-14 04:10:18,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:10:18,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782977839] [2024-11-14 04:10:18,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:10:18,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:10:18,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:10:18,589 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 17 proven. 32 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-14 04:10:18,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:10:18,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782977839] [2024-11-14 04:10:18,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782977839] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:10:18,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376331212] [2024-11-14 04:10:18,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:10:18,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:10:18,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:10:18,592 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:10:18,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-14 04:10:18,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:10:18,770 INFO L255 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-14 04:10:18,774 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:10:18,862 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:10:18,862 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:10:18,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376331212] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:10:18,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:10:18,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-14 04:10:18,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797656149] [2024-11-14 04:10:18,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:10:18,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:10:18,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:10:18,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:10:18,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-14 04:10:18,863 INFO L87 Difference]: Start difference. First operand 22812 states and 30217 transitions. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 4 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-14 04:10:21,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:10:21,301 INFO L93 Difference]: Finished difference Result 48228 states and 62722 transitions. [2024-11-14 04:10:21,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 04:10:21,302 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 4 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 135 [2024-11-14 04:10:21,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:10:21,377 INFO L225 Difference]: With dead ends: 48228 [2024-11-14 04:10:21,378 INFO L226 Difference]: Without dead ends: 34167 [2024-11-14 04:10:21,399 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-14 04:10:21,400 INFO L432 NwaCegarLoop]: 3262 mSDtfsCounter, 118 mSDsluCounter, 9529 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 12791 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 04:10:21,400 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 12791 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1138 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 04:10:21,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34167 states. [2024-11-14 04:10:23,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34167 to 31441. [2024-11-14 04:10:23,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31441 states, 27091 states have (on average 1.3161197445646156) internal successors, (35655), 27100 states have internal predecessors, (35655), 2421 states have call successors, (2421), 1960 states have call predecessors, (2421), 1927 states have return successors, (2733), 2381 states have call predecessors, (2733), 2419 states have call successors, (2733) [2024-11-14 04:10:23,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31441 states to 31441 states and 40809 transitions. [2024-11-14 04:10:23,166 INFO L78 Accepts]: Start accepts. Automaton has 31441 states and 40809 transitions. Word has length 135 [2024-11-14 04:10:23,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:10:23,166 INFO L471 AbstractCegarLoop]: Abstraction has 31441 states and 40809 transitions. [2024-11-14 04:10:23,167 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 4 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-14 04:10:23,167 INFO L276 IsEmpty]: Start isEmpty. Operand 31441 states and 40809 transitions. [2024-11-14 04:10:23,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2024-11-14 04:10:23,196 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:10:23,196 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:10:23,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-14 04:10:23,396 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-14 04:10:23,397 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:10:23,397 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:10:23,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1543002973, now seen corresponding path program 1 times [2024-11-14 04:10:23,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:10:23,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164495685] [2024-11-14 04:10:23,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:10:23,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:10:23,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:10:23,470 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 40 proven. 16 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-11-14 04:10:23,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:10:23,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164495685] [2024-11-14 04:10:23,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164495685] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:10:23,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418141729] [2024-11-14 04:10:23,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:10:23,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:10:23,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:10:23,473 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:10:23,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-14 04:10:23,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:10:23,658 INFO L255 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:10:23,661 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:10:23,702 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-14 04:10:23,702 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:10:23,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418141729] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:10:23,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:10:23,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2024-11-14 04:10:23,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204630143] [2024-11-14 04:10:23,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:10:23,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:10:23,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:10:23,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:10:23,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:10:23,705 INFO L87 Difference]: Start difference. First operand 31441 states and 40809 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-14 04:10:25,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:10:25,630 INFO L93 Difference]: Finished difference Result 49613 states and 64860 transitions. [2024-11-14 04:10:25,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:10:25,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 166 [2024-11-14 04:10:25,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:10:25,710 INFO L225 Difference]: With dead ends: 49613 [2024-11-14 04:10:25,710 INFO L226 Difference]: Without dead ends: 31410 [2024-11-14 04:10:25,737 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 167 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 04:10:25,738 INFO L432 NwaCegarLoop]: 3275 mSDtfsCounter, 110 mSDsluCounter, 3173 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 6448 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:10:25,739 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 6448 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 04:10:25,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31410 states. [2024-11-14 04:10:27,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31410 to 31074. [2024-11-14 04:10:27,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31074 states, 26759 states have (on average 1.2935460966403827) internal successors, (34614), 26767 states have internal predecessors, (34614), 2401 states have call successors, (2401), 1944 states have call predecessors, (2401), 1912 states have return successors, (2711), 2363 states have call predecessors, (2711), 2399 states have call successors, (2711) [2024-11-14 04:10:27,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31074 states to 31074 states and 39726 transitions. [2024-11-14 04:10:27,973 INFO L78 Accepts]: Start accepts. Automaton has 31074 states and 39726 transitions. Word has length 166 [2024-11-14 04:10:27,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:10:27,974 INFO L471 AbstractCegarLoop]: Abstraction has 31074 states and 39726 transitions. [2024-11-14 04:10:27,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-14 04:10:27,975 INFO L276 IsEmpty]: Start isEmpty. Operand 31074 states and 39726 transitions. [2024-11-14 04:10:28,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2024-11-14 04:10:28,008 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:10:28,008 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:10:28,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-14 04:10:28,209 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-14 04:10:28,209 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:10:28,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:10:28,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1036119975, now seen corresponding path program 1 times [2024-11-14 04:10:28,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:10:28,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285089847] [2024-11-14 04:10:28,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:10:28,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:10:28,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:10:28,549 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 23 proven. 72 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-14 04:10:28,549 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:10:28,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285089847] [2024-11-14 04:10:28,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285089847] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:10:28,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746199232] [2024-11-14 04:10:28,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:10:28,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:10:28,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:10:28,552 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:10:28,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-14 04:10:28,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:10:28,771 INFO L255 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:10:28,775 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:10:28,888 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-14 04:10:28,888 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:10:28,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746199232] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:10:28,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:10:28,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-14 04:10:28,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664438129] [2024-11-14 04:10:28,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:10:28,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:10:28,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:10:28,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:10:28,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 04:10:28,890 INFO L87 Difference]: Start difference. First operand 31074 states and 39726 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, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-14 04:10:30,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:10:30,692 INFO L93 Difference]: Finished difference Result 45372 states and 57772 transitions. [2024-11-14 04:10:30,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:10:30,692 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, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 168 [2024-11-14 04:10:30,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:10:30,819 INFO L225 Difference]: With dead ends: 45372 [2024-11-14 04:10:30,819 INFO L226 Difference]: Without dead ends: 33138 [2024-11-14 04:10:30,855 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 176 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 04:10:30,855 INFO L432 NwaCegarLoop]: 3202 mSDtfsCounter, 3360 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3360 SdHoareTripleChecker+Valid, 3237 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:10:30,856 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3360 Valid, 3237 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:10:30,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33138 states. [2024-11-14 04:10:32,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33138 to 32556. [2024-11-14 04:10:32,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32556 states, 28095 states have (on average 1.2815803523758675) internal successors, (36006), 28137 states have internal predecessors, (36006), 2417 states have call successors, (2417), 2024 states have call predecessors, (2417), 2042 states have return successors, (2823), 2395 states have call predecessors, (2823), 2415 states have call successors, (2823) [2024-11-14 04:10:33,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32556 states to 32556 states and 41246 transitions. [2024-11-14 04:10:33,056 INFO L78 Accepts]: Start accepts. Automaton has 32556 states and 41246 transitions. Word has length 168 [2024-11-14 04:10:33,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:10:33,056 INFO L471 AbstractCegarLoop]: Abstraction has 32556 states and 41246 transitions. [2024-11-14 04:10:33,056 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, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-14 04:10:33,056 INFO L276 IsEmpty]: Start isEmpty. Operand 32556 states and 41246 transitions. [2024-11-14 04:10:33,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2024-11-14 04:10:33,078 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:10:33,079 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:10:33,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-14 04:10:33,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-14 04:10:33,279 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:10:33,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:10:33,280 INFO L85 PathProgramCache]: Analyzing trace with hash 188735932, now seen corresponding path program 1 times [2024-11-14 04:10:33,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:10:33,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402105134] [2024-11-14 04:10:33,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:10:33,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:10:33,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:10:33,597 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 23 proven. 74 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-14 04:10:33,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:10:33,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402105134] [2024-11-14 04:10:33,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402105134] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:10:33,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677068261] [2024-11-14 04:10:33,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:10:33,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:10:33,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:10:33,600 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:10:33,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68cef11-655e-4a8f-a443-ffeff95adfb9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-14 04:10:33,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:10:33,807 INFO L255 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-14 04:10:33,810 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:10:33,929 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 04:10:33,929 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:10:33,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677068261] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:10:33,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:10:33,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-14 04:10:33,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610909989] [2024-11-14 04:10:33,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:10:33,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:10:33,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:10:33,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:10:33,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-14 04:10:33,932 INFO L87 Difference]: Start difference. First operand 32556 states and 41246 transitions. Second operand has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-14 04:10:37,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:10:37,711 INFO L93 Difference]: Finished difference Result 59948 states and 75132 transitions. [2024-11-14 04:10:37,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 04:10:37,712 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 169 [2024-11-14 04:10:37,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:10:37,839 INFO L225 Difference]: With dead ends: 59948 [2024-11-14 04:10:37,840 INFO L226 Difference]: Without dead ends: 41642 [2024-11-14 04:10:37,873 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-14 04:10:37,873 INFO L432 NwaCegarLoop]: 3256 mSDtfsCounter, 114 mSDsluCounter, 6370 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 9626 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 04:10:37,874 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 9626 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 04:10:37,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41642 states.