./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.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_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/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_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/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_cfd27bed-4496-40b8-a418-76b9e44ad52c/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 0becd5109c9f10d4cd495bd258560ff3ae7f6a1dd143c8dd06621d725fa7a35e --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 03:24:53,400 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 03:24:53,482 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 03:24:53,488 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 03:24:53,489 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 03:24:53,515 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 03:24:53,516 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 03:24:53,517 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 03:24:53,517 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 03:24:53,517 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 03:24:53,517 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 03:24:53,518 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 03:24:53,518 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 03:24:53,518 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 03:24:53,518 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 03:24:53,518 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 03:24:53,519 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 03:24:53,519 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 03:24:53,519 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 03:24:53,519 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 03:24:53,519 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 03:24:53,520 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 03:24:53,520 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 03:24:53,520 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 03:24:53,521 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 03:24:53,521 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 03:24:53,521 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 03:24:53,521 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 03:24:53,521 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 03:24:53,521 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 03:24:53,521 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 03:24:53,521 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 03:24:53,521 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 03:24:53,522 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 03:24:53,522 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 03:24:53,522 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 03:24:53,522 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 03:24:53,523 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 03:24:53,523 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:24:53,523 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 03:24:53,523 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 03:24:53,523 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 03:24:53,523 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 03:24:53,523 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 03:24:53,524 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 03:24:53,524 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 03:24:53,524 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 03:24:53,524 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_cfd27bed-4496-40b8-a418-76b9e44ad52c/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 -> 0becd5109c9f10d4cd495bd258560ff3ae7f6a1dd143c8dd06621d725fa7a35e [2024-11-14 03:24:53,946 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 03:24:53,958 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 03:24:53,963 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 03:24:53,965 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 03:24:53,967 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 03:24:53,968 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-2.c Unable to find full path for "g++" [2024-11-14 03:24:56,065 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 03:24:56,520 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 03:24:56,521 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-2.c [2024-11-14 03:24:56,537 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/data/2768eda4c/3340a95e8224480fa31c7f38f2b4eb29/FLAGd81170c8a [2024-11-14 03:24:56,562 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/data/2768eda4c/3340a95e8224480fa31c7f38f2b4eb29 [2024-11-14 03:24:56,565 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 03:24:56,570 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 03:24:56,573 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 03:24:56,574 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 03:24:56,580 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 03:24:56,581 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:24:56" (1/1) ... [2024-11-14 03:24:56,583 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bc81bdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:24:56, skipping insertion in model container [2024-11-14 03:24:56,584 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:24:56" (1/1) ... [2024-11-14 03:24:56,649 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 03:24:56,878 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_cfd27bed-4496-40b8-a418-76b9e44ad52c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-2.c[914,927] [2024-11-14 03:24:56,991 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_cfd27bed-4496-40b8-a418-76b9e44ad52c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-2.c[7115,7128] [2024-11-14 03:24:57,143 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:24:57,160 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 03:24:57,172 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_cfd27bed-4496-40b8-a418-76b9e44ad52c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-2.c[914,927] [2024-11-14 03:24:57,193 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_cfd27bed-4496-40b8-a418-76b9e44ad52c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-2.c[7115,7128] [2024-11-14 03:24:57,259 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:24:57,302 INFO L204 MainTranslator]: Completed translation [2024-11-14 03:24:57,303 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:24:57 WrapperNode [2024-11-14 03:24:57,303 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 03:24:57,305 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 03:24:57,305 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 03:24:57,306 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 03:24:57,316 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:24:57" (1/1) ... [2024-11-14 03:24:57,334 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:24:57" (1/1) ... [2024-11-14 03:24:57,408 INFO L138 Inliner]: procedures = 65, calls = 75, calls flagged for inlining = 34, calls inlined = 34, statements flattened = 695 [2024-11-14 03:24:57,412 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 03:24:57,413 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 03:24:57,413 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 03:24:57,413 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 03:24:57,428 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:24:57" (1/1) ... [2024-11-14 03:24:57,429 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:24:57" (1/1) ... [2024-11-14 03:24:57,432 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:24:57" (1/1) ... [2024-11-14 03:24:57,436 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:24:57" (1/1) ... [2024-11-14 03:24:57,453 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:24:57" (1/1) ... [2024-11-14 03:24:57,476 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:24:57" (1/1) ... [2024-11-14 03:24:57,479 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:24:57" (1/1) ... [2024-11-14 03:24:57,481 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:24:57" (1/1) ... [2024-11-14 03:24:57,494 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 03:24:57,495 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 03:24:57,495 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 03:24:57,495 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 03:24:57,496 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:24:57" (1/1) ... [2024-11-14 03:24:57,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:24:57,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:24:57,536 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 03:24:57,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 03:24:57,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 03:24:57,581 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-14 03:24:57,581 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-14 03:24:57,582 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2024-11-14 03:24:57,582 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2024-11-14 03:24:57,582 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2024-11-14 03:24:57,582 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2024-11-14 03:24:57,582 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2024-11-14 03:24:57,582 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2024-11-14 03:24:57,583 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2024-11-14 03:24:57,583 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2024-11-14 03:24:57,583 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2024-11-14 03:24:57,583 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2024-11-14 03:24:57,583 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2024-11-14 03:24:57,583 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2024-11-14 03:24:57,584 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2024-11-14 03:24:57,584 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2024-11-14 03:24:57,585 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2024-11-14 03:24:57,586 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2024-11-14 03:24:57,586 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2024-11-14 03:24:57,586 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2024-11-14 03:24:57,587 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2024-11-14 03:24:57,587 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2024-11-14 03:24:57,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 03:24:57,587 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2024-11-14 03:24:57,587 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2024-11-14 03:24:57,587 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2024-11-14 03:24:57,587 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2024-11-14 03:24:57,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 03:24:57,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 03:24:57,588 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2024-11-14 03:24:57,588 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2024-11-14 03:24:57,779 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 03:24:57,782 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 03:24:58,921 INFO L? ?]: Removed 91 outVars from TransFormulas that were not future-live. [2024-11-14 03:24:58,922 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 03:24:59,534 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 03:24:59,536 INFO L316 CfgBuilder]: Removed 13 assume(true) statements. [2024-11-14 03:24:59,536 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:24:59 BoogieIcfgContainer [2024-11-14 03:24:59,537 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 03:24:59,539 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 03:24:59,539 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 03:24:59,545 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 03:24:59,545 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 03:24:56" (1/3) ... [2024-11-14 03:24:59,546 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a46a8aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:24:59, skipping insertion in model container [2024-11-14 03:24:59,546 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:24:57" (2/3) ... [2024-11-14 03:24:59,547 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a46a8aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:24:59, skipping insertion in model container [2024-11-14 03:24:59,547 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:24:59" (3/3) ... [2024-11-14 03:24:59,550 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.06.cil-2.c [2024-11-14 03:24:59,572 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 03:24:59,575 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG pc_sfifo_2.cil-1+token_ring.06.cil-2.c that has 15 procedures, 201 locations, 1 initial locations, 13 loop locations, and 2 error locations. [2024-11-14 03:24:59,676 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 03:24:59,697 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;@1cf85010, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 03:24:59,697 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-14 03:24:59,704 INFO L276 IsEmpty]: Start isEmpty. Operand has 201 states, 150 states have (on average 1.4933333333333334) internal successors, (224), 156 states have internal predecessors, (224), 34 states have call successors, (34), 14 states have call predecessors, (34), 14 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2024-11-14 03:24:59,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-14 03:24:59,718 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:24:59,719 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:24:59,720 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:24:59,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:24:59,728 INFO L85 PathProgramCache]: Analyzing trace with hash 2072575003, now seen corresponding path program 1 times [2024-11-14 03:24:59,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:24:59,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172415620] [2024-11-14 03:24:59,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:24:59,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:24:59,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:25:00,228 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 03:25:00,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:25:00,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172415620] [2024-11-14 03:25:00,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172415620] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:25:00,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:25:00,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 03:25:00,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833937438] [2024-11-14 03:25:00,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:25:00,238 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:25:00,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:25:00,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:25:00,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:25:00,265 INFO L87 Difference]: Start difference. First operand has 201 states, 150 states have (on average 1.4933333333333334) internal successors, (224), 156 states have internal predecessors, (224), 34 states have call successors, (34), 14 states have call predecessors, (34), 14 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-14 03:25:00,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:25:00,894 INFO L93 Difference]: Finished difference Result 453 states and 655 transitions. [2024-11-14 03:25:00,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:25:00,897 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2024-11-14 03:25:00,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:25:00,908 INFO L225 Difference]: With dead ends: 453 [2024-11-14 03:25:00,909 INFO L226 Difference]: Without dead ends: 256 [2024-11-14 03:25:00,913 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 03:25:00,917 INFO L432 NwaCegarLoop]: 290 mSDtfsCounter, 340 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:25:00,918 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 494 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 03:25:00,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2024-11-14 03:25:00,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 249. [2024-11-14 03:25:00,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 185 states have (on average 1.3891891891891892) internal successors, (257), 189 states have internal predecessors, (257), 42 states have call successors, (42), 21 states have call predecessors, (42), 20 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2024-11-14 03:25:01,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 339 transitions. [2024-11-14 03:25:01,004 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 339 transitions. Word has length 45 [2024-11-14 03:25:01,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:25:01,006 INFO L471 AbstractCegarLoop]: Abstraction has 249 states and 339 transitions. [2024-11-14 03:25:01,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-14 03:25:01,007 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 339 transitions. [2024-11-14 03:25:01,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-14 03:25:01,010 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:25:01,011 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:25:01,011 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 03:25:01,011 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:25:01,013 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:25:01,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1303417670, now seen corresponding path program 1 times [2024-11-14 03:25:01,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:25:01,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30172162] [2024-11-14 03:25:01,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:25:01,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:25:01,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:25:01,361 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 03:25:01,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:25:01,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30172162] [2024-11-14 03:25:01,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30172162] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:25:01,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:25:01,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 03:25:01,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465870859] [2024-11-14 03:25:01,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:25:01,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 03:25:01,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:25:01,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 03:25:01,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:25:01,367 INFO L87 Difference]: Start difference. First operand 249 states and 339 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-14 03:25:02,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:25:02,387 INFO L93 Difference]: Finished difference Result 651 states and 842 transitions. [2024-11-14 03:25:02,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 03:25:02,388 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2024-11-14 03:25:02,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:25:02,394 INFO L225 Difference]: With dead ends: 651 [2024-11-14 03:25:02,395 INFO L226 Difference]: Without dead ends: 519 [2024-11-14 03:25:02,398 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-14 03:25:02,399 INFO L432 NwaCegarLoop]: 371 mSDtfsCounter, 696 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 937 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:25:02,401 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [700 Valid, 937 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 03:25:02,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2024-11-14 03:25:02,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 435. [2024-11-14 03:25:02,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 317 states have (on average 1.3154574132492114) internal successors, (417), 322 states have internal predecessors, (417), 69 states have call successors, (69), 44 states have call predecessors, (69), 47 states have return successors, (71), 70 states have call predecessors, (71), 67 states have call successors, (71) [2024-11-14 03:25:02,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 557 transitions. [2024-11-14 03:25:02,530 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 557 transitions. Word has length 45 [2024-11-14 03:25:02,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:25:02,530 INFO L471 AbstractCegarLoop]: Abstraction has 435 states and 557 transitions. [2024-11-14 03:25:02,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-14 03:25:02,530 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 557 transitions. [2024-11-14 03:25:02,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-14 03:25:02,534 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:25:02,534 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:25:02,534 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 03:25:02,534 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:25:02,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:25:02,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1140443034, now seen corresponding path program 1 times [2024-11-14 03:25:02,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:25:02,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171496357] [2024-11-14 03:25:02,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:25:02,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:25:02,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:25:02,944 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 03:25:02,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:25:02,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171496357] [2024-11-14 03:25:02,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171496357] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:25:02,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:25:02,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-14 03:25:02,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746190790] [2024-11-14 03:25:02,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:25:02,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 03:25:02,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:25:02,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 03:25:02,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-14 03:25:02,948 INFO L87 Difference]: Start difference. First operand 435 states and 557 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-14 03:25:04,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:25:04,192 INFO L93 Difference]: Finished difference Result 951 states and 1173 transitions. [2024-11-14 03:25:04,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 03:25:04,193 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2024-11-14 03:25:04,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:25:04,199 INFO L225 Difference]: With dead ends: 951 [2024-11-14 03:25:04,200 INFO L226 Difference]: Without dead ends: 649 [2024-11-14 03:25:04,202 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2024-11-14 03:25:04,203 INFO L432 NwaCegarLoop]: 159 mSDtfsCounter, 401 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:25:04,204 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 837 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 03:25:04,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2024-11-14 03:25:04,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 614. [2024-11-14 03:25:04,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 442 states have (on average 1.2873303167420815) internal successors, (569), 448 states have internal predecessors, (569), 96 states have call successors, (96), 67 states have call predecessors, (96), 74 states have return successors, (102), 100 states have call predecessors, (102), 94 states have call successors, (102) [2024-11-14 03:25:04,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 767 transitions. [2024-11-14 03:25:04,321 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 767 transitions. Word has length 46 [2024-11-14 03:25:04,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:25:04,322 INFO L471 AbstractCegarLoop]: Abstraction has 614 states and 767 transitions. [2024-11-14 03:25:04,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-14 03:25:04,322 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 767 transitions. [2024-11-14 03:25:04,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-14 03:25:04,325 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:25:04,325 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:25:04,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 03:25:04,325 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:25:04,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:25:04,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1220469106, now seen corresponding path program 1 times [2024-11-14 03:25:04,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:25:04,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564288066] [2024-11-14 03:25:04,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:25:04,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:25:04,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:25:04,431 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 03:25:04,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:25:04,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564288066] [2024-11-14 03:25:04,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564288066] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:25:04,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:25:04,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:25:04,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284394354] [2024-11-14 03:25:04,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:25:04,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:25:04,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:25:04,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:25:04,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:25:04,433 INFO L87 Difference]: Start difference. First operand 614 states and 767 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:25:04,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:25:04,673 INFO L93 Difference]: Finished difference Result 1178 states and 1437 transitions. [2024-11-14 03:25:04,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:25:04,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2024-11-14 03:25:04,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:25:04,680 INFO L225 Difference]: With dead ends: 1178 [2024-11-14 03:25:04,680 INFO L226 Difference]: Without dead ends: 746 [2024-11-14 03:25:04,701 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 03:25:04,702 INFO L432 NwaCegarLoop]: 239 mSDtfsCounter, 67 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:25:04,705 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 447 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:25:04,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2024-11-14 03:25:04,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 641. [2024-11-14 03:25:04,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 465 states have (on average 1.2774193548387096) internal successors, (594), 471 states have internal predecessors, (594), 98 states have call successors, (98), 69 states have call predecessors, (98), 76 states have return successors, (104), 102 states have call predecessors, (104), 96 states have call successors, (104) [2024-11-14 03:25:04,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 796 transitions. [2024-11-14 03:25:04,821 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 796 transitions. Word has length 47 [2024-11-14 03:25:04,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:25:04,824 INFO L471 AbstractCegarLoop]: Abstraction has 641 states and 796 transitions. [2024-11-14 03:25:04,824 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:25:04,825 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 796 transitions. [2024-11-14 03:25:04,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-14 03:25:04,830 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:25:04,830 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:25:04,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 03:25:04,831 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:25:04,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:25:04,831 INFO L85 PathProgramCache]: Analyzing trace with hash -870423335, now seen corresponding path program 1 times [2024-11-14 03:25:04,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:25:04,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719958275] [2024-11-14 03:25:04,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:25:04,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:25:04,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:25:05,016 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 03:25:05,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:25:05,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719958275] [2024-11-14 03:25:05,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719958275] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:25:05,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:25:05,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 03:25:05,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069373236] [2024-11-14 03:25:05,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:25:05,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:25:05,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:25:05,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:25:05,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:25:05,019 INFO L87 Difference]: Start difference. First operand 641 states and 796 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 03:25:05,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:25:05,917 INFO L93 Difference]: Finished difference Result 1224 states and 1708 transitions. [2024-11-14 03:25:05,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 03:25:05,917 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 49 [2024-11-14 03:25:05,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:25:05,924 INFO L225 Difference]: With dead ends: 1224 [2024-11-14 03:25:05,925 INFO L226 Difference]: Without dead ends: 1102 [2024-11-14 03:25:05,926 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:25:05,927 INFO L432 NwaCegarLoop]: 355 mSDtfsCounter, 925 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 926 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:25:05,927 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [926 Valid, 878 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:25:05,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2024-11-14 03:25:06,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 1091. [2024-11-14 03:25:06,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1091 states, 830 states have (on average 1.3493975903614457) internal successors, (1120), 839 states have internal predecessors, (1120), 159 states have call successors, (159), 93 states have call predecessors, (159), 100 states have return successors, (203), 160 states have call predecessors, (203), 157 states have call successors, (203) [2024-11-14 03:25:06,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 1482 transitions. [2024-11-14 03:25:06,061 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 1482 transitions. Word has length 49 [2024-11-14 03:25:06,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:25:06,063 INFO L471 AbstractCegarLoop]: Abstraction has 1091 states and 1482 transitions. [2024-11-14 03:25:06,064 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 03:25:06,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 1482 transitions. [2024-11-14 03:25:06,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-14 03:25:06,065 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:25:06,065 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-14 03:25:06,065 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 03:25:06,065 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:25:06,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:25:06,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1467612738, now seen corresponding path program 1 times [2024-11-14 03:25:06,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:25:06,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534797930] [2024-11-14 03:25:06,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:25:06,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:25:06,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:25:06,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:25:06,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:25:06,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534797930] [2024-11-14 03:25:06,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534797930] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:25:06,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:25:06,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:25:06,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788499369] [2024-11-14 03:25:06,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:25:06,171 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:25:06,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:25:06,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:25:06,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:25:06,172 INFO L87 Difference]: Start difference. First operand 1091 states and 1482 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:25:06,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:25:06,349 INFO L93 Difference]: Finished difference Result 1281 states and 1703 transitions. [2024-11-14 03:25:06,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:25:06,350 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2024-11-14 03:25:06,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:25:06,358 INFO L225 Difference]: With dead ends: 1281 [2024-11-14 03:25:06,358 INFO L226 Difference]: Without dead ends: 1008 [2024-11-14 03:25:06,360 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 03:25:06,362 INFO L432 NwaCegarLoop]: 241 mSDtfsCounter, 245 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:25:06,363 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 302 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:25:06,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2024-11-14 03:25:06,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 899. [2024-11-14 03:25:06,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 690 states have (on average 1.3594202898550725) internal successors, (938), 697 states have internal predecessors, (938), 135 states have call successors, (135), 73 states have call predecessors, (135), 72 states have return successors, (171), 130 states have call predecessors, (171), 133 states have call successors, (171) [2024-11-14 03:25:06,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1244 transitions. [2024-11-14 03:25:06,484 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1244 transitions. Word has length 53 [2024-11-14 03:25:06,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:25:06,484 INFO L471 AbstractCegarLoop]: Abstraction has 899 states and 1244 transitions. [2024-11-14 03:25:06,484 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:25:06,485 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1244 transitions. [2024-11-14 03:25:06,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-14 03:25:06,485 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:25:06,486 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-14 03:25:06,486 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-14 03:25:06,486 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:25:06,487 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:25:06,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1720659971, now seen corresponding path program 1 times [2024-11-14 03:25:06,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:25:06,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020028149] [2024-11-14 03:25:06,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:25:06,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:25:06,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:25:06,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:25:06,637 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:25:06,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020028149] [2024-11-14 03:25:06,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020028149] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:25:06,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:25:06,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 03:25:06,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404951017] [2024-11-14 03:25:06,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:25:06,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:25:06,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:25:06,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:25:06,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:25:06,639 INFO L87 Difference]: Start difference. First operand 899 states and 1244 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2024-11-14 03:25:07,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:25:07,064 INFO L93 Difference]: Finished difference Result 1002 states and 1360 transitions. [2024-11-14 03:25:07,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:25:07,065 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2024-11-14 03:25:07,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:25:07,079 INFO L225 Difference]: With dead ends: 1002 [2024-11-14 03:25:07,079 INFO L226 Difference]: Without dead ends: 999 [2024-11-14 03:25:07,082 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:25:07,083 INFO L432 NwaCegarLoop]: 233 mSDtfsCounter, 451 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:25:07,083 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 273 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:25:07,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2024-11-14 03:25:07,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 898. [2024-11-14 03:25:07,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 690 states have (on average 1.355072463768116) internal successors, (935), 696 states have internal predecessors, (935), 134 states have call successors, (134), 73 states have call predecessors, (134), 72 states have return successors, (171), 130 states have call predecessors, (171), 133 states have call successors, (171) [2024-11-14 03:25:07,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1240 transitions. [2024-11-14 03:25:07,224 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1240 transitions. Word has length 54 [2024-11-14 03:25:07,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:25:07,225 INFO L471 AbstractCegarLoop]: Abstraction has 898 states and 1240 transitions. [2024-11-14 03:25:07,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2024-11-14 03:25:07,225 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1240 transitions. [2024-11-14 03:25:07,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-14 03:25:07,226 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:25:07,227 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:25:07,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-14 03:25:07,227 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:25:07,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:25:07,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1799859926, now seen corresponding path program 1 times [2024-11-14 03:25:07,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:25:07,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380141686] [2024-11-14 03:25:07,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:25:07,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:25:07,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:25:07,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:25:07,428 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:25:07,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380141686] [2024-11-14 03:25:07,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380141686] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:25:07,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806019661] [2024-11-14 03:25:07,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:25:07,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:25:07,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:25:07,431 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:25:07,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 03:25:07,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:25:07,588 INFO L255 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 03:25:07,596 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:25:08,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:25:08,004 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:25:08,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:25:08,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806019661] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:25:08,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [626349342] [2024-11-14 03:25:08,184 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2024-11-14 03:25:08,184 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:25:08,189 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:25:08,196 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:25:08,196 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:25:12,807 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 151 for LOIs [2024-11-14 03:25:12,864 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 147 for LOIs [2024-11-14 03:25:12,914 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 155 for LOIs [2024-11-14 03:25:13,492 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 151 for LOIs [2024-11-14 03:25:13,610 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 151 for LOIs [2024-11-14 03:25:13,736 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 151 for LOIs [2024-11-14 03:25:13,776 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 158 for LOIs [2024-11-14 03:25:13,817 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:25:28,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [626349342] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:25:28,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:25:28,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [5, 5, 4] total 36 [2024-11-14 03:25:28,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985800630] [2024-11-14 03:25:28,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:25:28,435 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-14 03:25:28,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:25:28,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-14 03:25:28,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2024-11-14 03:25:28,437 INFO L87 Difference]: Start difference. First operand 898 states and 1240 transitions. Second operand has 31 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 7 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-14 03:25:40,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:25:40,333 INFO L93 Difference]: Finished difference Result 1240 states and 1633 transitions. [2024-11-14 03:25:40,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-14 03:25:40,335 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 7 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 55 [2024-11-14 03:25:40,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:25:40,345 INFO L225 Difference]: With dead ends: 1240 [2024-11-14 03:25:40,346 INFO L226 Difference]: Without dead ends: 925 [2024-11-14 03:25:40,348 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 131 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=405, Invalid=1947, Unknown=0, NotChecked=0, Total=2352 [2024-11-14 03:25:40,352 INFO L432 NwaCegarLoop]: 214 mSDtfsCounter, 106 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 1713 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 915 SdHoareTripleChecker+Invalid, 1790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:25:40,353 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 915 Invalid, 1790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1713 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2024-11-14 03:25:40,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2024-11-14 03:25:40,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 917. [2024-11-14 03:25:40,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 707 states have (on average 1.3507779349363507) internal successors, (955), 713 states have internal predecessors, (955), 135 states have call successors, (135), 74 states have call predecessors, (135), 73 states have return successors, (172), 131 states have call predecessors, (172), 134 states have call successors, (172) [2024-11-14 03:25:40,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1262 transitions. [2024-11-14 03:25:40,514 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1262 transitions. Word has length 55 [2024-11-14 03:25:40,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:25:40,514 INFO L471 AbstractCegarLoop]: Abstraction has 917 states and 1262 transitions. [2024-11-14 03:25:40,515 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 7 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-14 03:25:40,515 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1262 transitions. [2024-11-14 03:25:40,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-14 03:25:40,517 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:25:40,517 INFO L215 NwaCegarLoop]: trace histogram [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 03:25:40,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 03:25:40,721 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-14 03:25:40,722 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:25:40,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:25:40,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1533128168, now seen corresponding path program 1 times [2024-11-14 03:25:40,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:25:40,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673952269] [2024-11-14 03:25:40,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:25:40,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:25:40,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:25:40,833 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:25:40,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:25:40,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673952269] [2024-11-14 03:25:40,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673952269] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:25:40,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:25:40,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:25:40,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160537994] [2024-11-14 03:25:40,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:25:40,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:25:40,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:25:40,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:25:40,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:25:40,836 INFO L87 Difference]: Start difference. First operand 917 states and 1262 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 03:25:41,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:25:41,132 INFO L93 Difference]: Finished difference Result 1198 states and 1584 transitions. [2024-11-14 03:25:41,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:25:41,133 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 61 [2024-11-14 03:25:41,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:25:41,140 INFO L225 Difference]: With dead ends: 1198 [2024-11-14 03:25:41,140 INFO L226 Difference]: Without dead ends: 1029 [2024-11-14 03:25:41,142 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 03:25:41,144 INFO L432 NwaCegarLoop]: 260 mSDtfsCounter, 42 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:25:41,145 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 484 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:25:41,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2024-11-14 03:25:41,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 952. [2024-11-14 03:25:41,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 736 states have (on average 1.346467391304348) internal successors, (991), 742 states have internal predecessors, (991), 138 states have call successors, (138), 77 states have call predecessors, (138), 76 states have return successors, (175), 134 states have call predecessors, (175), 137 states have call successors, (175) [2024-11-14 03:25:41,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1304 transitions. [2024-11-14 03:25:41,303 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1304 transitions. Word has length 61 [2024-11-14 03:25:41,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:25:41,304 INFO L471 AbstractCegarLoop]: Abstraction has 952 states and 1304 transitions. [2024-11-14 03:25:41,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 03:25:41,305 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1304 transitions. [2024-11-14 03:25:41,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-14 03:25:41,313 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:25:41,313 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:25:41,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-14 03:25:41,313 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:25:41,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:25:41,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1948778158, now seen corresponding path program 1 times [2024-11-14 03:25:41,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:25:41,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877155688] [2024-11-14 03:25:41,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:25:41,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:25:41,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:25:41,858 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-14 03:25:41,858 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:25:41,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877155688] [2024-11-14 03:25:41,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877155688] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:25:41,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923737366] [2024-11-14 03:25:41,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:25:41,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:25:41,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:25:41,861 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:25:41,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 03:25:42,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:25:42,030 INFO L255 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 03:25:42,038 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:25:42,119 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:25:42,120 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:25:42,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923737366] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:25:42,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:25:42,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2024-11-14 03:25:42,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570284557] [2024-11-14 03:25:42,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:25:42,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 03:25:42,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:25:42,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 03:25:42,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2024-11-14 03:25:42,124 INFO L87 Difference]: Start difference. First operand 952 states and 1304 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-14 03:25:42,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:25:42,555 INFO L93 Difference]: Finished difference Result 1212 states and 1604 transitions. [2024-11-14 03:25:42,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 03:25:42,555 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2024-11-14 03:25:42,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:25:42,560 INFO L225 Difference]: With dead ends: 1212 [2024-11-14 03:25:42,561 INFO L226 Difference]: Without dead ends: 843 [2024-11-14 03:25:42,562 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2024-11-14 03:25:42,563 INFO L432 NwaCegarLoop]: 241 mSDtfsCounter, 202 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 915 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:25:42,566 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 915 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:25:42,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2024-11-14 03:25:42,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 839. [2024-11-14 03:25:42,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 661 states have (on average 1.3661119515885023) internal successors, (903), 667 states have internal predecessors, (903), 117 states have call successors, (117), 60 states have call predecessors, (117), 59 states have return successors, (154), 113 states have call predecessors, (154), 116 states have call successors, (154) [2024-11-14 03:25:42,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 1174 transitions. [2024-11-14 03:25:42,686 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 1174 transitions. Word has length 102 [2024-11-14 03:25:42,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:25:42,687 INFO L471 AbstractCegarLoop]: Abstraction has 839 states and 1174 transitions. [2024-11-14 03:25:42,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-14 03:25:42,687 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 1174 transitions. [2024-11-14 03:25:42,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-14 03:25:42,691 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:25:42,691 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:25:42,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 03:25:42,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-14 03:25:42,892 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:25:42,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:25:42,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1029973257, now seen corresponding path program 1 times [2024-11-14 03:25:42,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:25:42,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106546842] [2024-11-14 03:25:42,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:25:42,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:25:42,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:25:43,196 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-14 03:25:43,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:25:43,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106546842] [2024-11-14 03:25:43,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106546842] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:25:43,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778109619] [2024-11-14 03:25:43,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:25:43,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:25:43,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:25:43,200 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:25:43,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 03:25:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:25:43,360 INFO L255 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 03:25:43,365 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:25:43,826 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:25:43,827 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:25:43,997 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-14 03:25:43,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778109619] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:25:43,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1100686328] [2024-11-14 03:25:44,000 INFO L159 IcfgInterpreter]: Started Sifa with 65 locations of interest [2024-11-14 03:25:44,000 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:25:44,001 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:25:44,001 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:25:44,001 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:25:58,132 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 189 for LOIs [2024-11-14 03:25:58,404 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 160 for LOIs [2024-11-14 03:25:58,653 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 110 for LOIs [2024-11-14 03:25:58,694 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 174 for LOIs [2024-11-14 03:26:00,507 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 175 for LOIs [2024-11-14 03:26:01,993 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 124 for LOIs [2024-11-14 03:26:02,114 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 168 for LOIs [2024-11-14 03:26:02,328 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 179 for LOIs [2024-11-14 03:26:02,571 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:26:40,168 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26731#(and (= ~q_req_up~0 1) (= ~q_free~0 1) (exists ((|v_ULTIMATE.start_eval1_~tmp___0~2#1_16| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp___0~2#1_16| 0)) (<= |v_ULTIMATE.start_eval1_~tmp___0~2#1_16| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp___0~2#1_16| 2147483648)))) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~q_buf_0~0) (exists ((v_~c_last_read~0_10 Int) (v_~q_free~0_44 Int)) (and (<= v_~q_free~0_44 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (<= 1 |#StackHeapBarrier|) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= v_~c_last_read~0_10 0) (= ~t1_pc~0 0) (<= ~q_buf_0~0 2147483647) (<= ~p_dw_pc~0 1) (= ~T4_E~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (= ~E_5~0 2) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t2_i~0 0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~m_i~0 0) (<= 0 (+ ~q_buf_0~0 2147483648)) (= ~E_2~0 2) (or (and (exists ((|v_ULTIMATE.start_eval1_~tmp___1~0#1_25| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp___1~0#1_25| 0)) (<= |v_ULTIMATE.start_eval1_~tmp___1~0#1_25| 1) (<= 0 |v_ULTIMATE.start_eval1_~tmp___1~0#1_25|))) (= ~p_dw_pc~0 1) (= 2 ~p_dw_st~0) (exists ((|v_ULTIMATE.start_eval1_~tmp~2#1_19| Int)) (and (<= |v_ULTIMATE.start_eval1_~tmp~2#1_19| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp~2#1_19| 2147483648)) (not (= |v_ULTIMATE.start_eval1_~tmp~2#1_19| 0))))) (and (exists ((|v_ULTIMATE.start_eval1_~tmp___1~0#1_25| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp___1~0#1_25| 0)) (<= |v_ULTIMATE.start_eval1_~tmp___1~0#1_25| 1) (<= 0 |v_ULTIMATE.start_eval1_~tmp___1~0#1_25|))) (not (= ~p_dw_st~0 0)))) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= ~token~0 0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= 0 ~t4_pc~0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~M_E~0 2) (<= 0 v_~q_free~0_44) (not (= v_~q_free~0_44 1)) (= ~t1_i~0 0))) (= ~c_dr_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (= ~c_dr_st~0 1))' at error location [2024-11-14 03:26:40,168 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:26:40,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:26:40,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 13 [2024-11-14 03:26:40,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371183661] [2024-11-14 03:26:40,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:26:40,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-14 03:26:40,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:26:40,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-14 03:26:40,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=2973, Unknown=0, NotChecked=0, Total=3306 [2024-11-14 03:26:40,171 INFO L87 Difference]: Start difference. First operand 839 states and 1174 transitions. Second operand has 13 states, 12 states have (on average 13.166666666666666) internal successors, (158), 12 states have internal predecessors, (158), 9 states have call successors, (42), 5 states have call predecessors, (42), 5 states have return successors, (41), 10 states have call predecessors, (41), 9 states have call successors, (41) [2024-11-14 03:26:43,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:26:43,696 INFO L93 Difference]: Finished difference Result 1779 states and 2261 transitions. [2024-11-14 03:26:43,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-14 03:26:43,697 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 13.166666666666666) internal successors, (158), 12 states have internal predecessors, (158), 9 states have call successors, (42), 5 states have call predecessors, (42), 5 states have return successors, (41), 10 states have call predecessors, (41), 9 states have call successors, (41) Word has length 104 [2024-11-14 03:26:43,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:26:43,707 INFO L225 Difference]: With dead ends: 1779 [2024-11-14 03:26:43,707 INFO L226 Difference]: Without dead ends: 1597 [2024-11-14 03:26:43,712 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 272 SyntacticMatches, 8 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 4820 ImplicationChecksByTransitivity, 39.4s TimeCoverageRelationStatistics Valid=1088, Invalid=12252, Unknown=0, NotChecked=0, Total=13340 [2024-11-14 03:26:43,714 INFO L432 NwaCegarLoop]: 237 mSDtfsCounter, 1149 mSDsluCounter, 1528 mSDsCounter, 0 mSdLazyCounter, 2198 mSolverCounterSat, 421 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1154 SdHoareTripleChecker+Valid, 1765 SdHoareTripleChecker+Invalid, 2619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 421 IncrementalHoareTripleChecker+Valid, 2198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:26:43,714 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1154 Valid, 1765 Invalid, 2619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [421 Valid, 2198 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-14 03:26:43,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1597 states. [2024-11-14 03:26:43,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1597 to 1234. [2024-11-14 03:26:43,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 946 states have (on average 1.3086680761099365) internal successors, (1238), 952 states have internal predecessors, (1238), 175 states have call successors, (175), 112 states have call predecessors, (175), 111 states have return successors, (212), 171 states have call predecessors, (212), 174 states have call successors, (212) [2024-11-14 03:26:43,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1625 transitions. [2024-11-14 03:26:43,924 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1625 transitions. Word has length 104 [2024-11-14 03:26:43,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:26:43,924 INFO L471 AbstractCegarLoop]: Abstraction has 1234 states and 1625 transitions. [2024-11-14 03:26:43,924 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 13.166666666666666) internal successors, (158), 12 states have internal predecessors, (158), 9 states have call successors, (42), 5 states have call predecessors, (42), 5 states have return successors, (41), 10 states have call predecessors, (41), 9 states have call successors, (41) [2024-11-14 03:26:43,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1625 transitions. [2024-11-14 03:26:43,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-14 03:26:43,928 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:26:43,928 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:26:43,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-14 03:26:44,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-14 03:26:44,129 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:26:44,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:26:44,130 INFO L85 PathProgramCache]: Analyzing trace with hash 890901825, now seen corresponding path program 1 times [2024-11-14 03:26:44,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:26:44,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27323318] [2024-11-14 03:26:44,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:26:44,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:26:44,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:26:44,259 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:26:44,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:26:44,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27323318] [2024-11-14 03:26:44,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27323318] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:26:44,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007044707] [2024-11-14 03:26:44,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:26:44,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:26:44,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:26:44,262 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:26:44,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 03:26:44,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:26:44,421 INFO L255 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:26:44,424 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:26:44,463 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 03:26:44,465 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:26:44,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007044707] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:26:44,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:26:44,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:26:44,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008780053] [2024-11-14 03:26:44,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:26:44,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:26:44,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:26:44,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:26:44,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:26:44,468 INFO L87 Difference]: Start difference. First operand 1234 states and 1625 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:26:44,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:26:44,806 INFO L93 Difference]: Finished difference Result 2362 states and 3397 transitions. [2024-11-14 03:26:44,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:26:44,807 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 95 [2024-11-14 03:26:44,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:26:44,818 INFO L225 Difference]: With dead ends: 2362 [2024-11-14 03:26:44,818 INFO L226 Difference]: Without dead ends: 1790 [2024-11-14 03:26:44,822 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:26:44,823 INFO L432 NwaCegarLoop]: 225 mSDtfsCounter, 244 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:26:44,823 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 368 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:26:44,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2024-11-14 03:26:45,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1783. [2024-11-14 03:26:45,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1393 states have (on average 1.3467336683417086) internal successors, (1876), 1402 states have internal predecessors, (1876), 247 states have call successors, (247), 142 states have call predecessors, (247), 141 states have return successors, (318), 240 states have call predecessors, (318), 246 states have call successors, (318) [2024-11-14 03:26:45,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 2441 transitions. [2024-11-14 03:26:45,079 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 2441 transitions. Word has length 95 [2024-11-14 03:26:45,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:26:45,080 INFO L471 AbstractCegarLoop]: Abstraction has 1783 states and 2441 transitions. [2024-11-14 03:26:45,080 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:26:45,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 2441 transitions. [2024-11-14 03:26:45,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-14 03:26:45,084 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:26:45,084 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:26:45,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 03:26:45,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-14 03:26:45,288 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:26:45,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:26:45,288 INFO L85 PathProgramCache]: Analyzing trace with hash -732815263, now seen corresponding path program 1 times [2024-11-14 03:26:45,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:26:45,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774120577] [2024-11-14 03:26:45,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:26:45,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:26:45,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:26:45,398 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:26:45,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:26:45,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774120577] [2024-11-14 03:26:45,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774120577] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:26:45,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487045745] [2024-11-14 03:26:45,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:26:45,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:26:45,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:26:45,401 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:26:45,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 03:26:45,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:26:45,556 INFO L255 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:26:45,559 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:26:45,605 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 03:26:45,605 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:26:45,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487045745] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:26:45,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:26:45,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:26:45,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410741989] [2024-11-14 03:26:45,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:26:45,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:26:45,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:26:45,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:26:45,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:26:45,607 INFO L87 Difference]: Start difference. First operand 1783 states and 2441 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:26:46,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:26:46,020 INFO L93 Difference]: Finished difference Result 3994 states and 5883 transitions. [2024-11-14 03:26:46,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:26:46,021 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 95 [2024-11-14 03:26:46,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:26:46,036 INFO L225 Difference]: With dead ends: 3994 [2024-11-14 03:26:46,037 INFO L226 Difference]: Without dead ends: 2873 [2024-11-14 03:26:46,042 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:26:46,043 INFO L432 NwaCegarLoop]: 225 mSDtfsCounter, 235 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:26:46,043 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 368 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:26:46,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2873 states. [2024-11-14 03:26:46,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2873 to 2861. [2024-11-14 03:26:46,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2861 states, 2272 states have (on average 1.3741197183098592) internal successors, (3122), 2287 states have internal predecessors, (3122), 386 states have call successors, (386), 202 states have call predecessors, (386), 201 states have return successors, (521), 373 states have call predecessors, (521), 385 states have call successors, (521) [2024-11-14 03:26:46,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2861 states to 2861 states and 4029 transitions. [2024-11-14 03:26:46,405 INFO L78 Accepts]: Start accepts. Automaton has 2861 states and 4029 transitions. Word has length 95 [2024-11-14 03:26:46,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:26:46,406 INFO L471 AbstractCegarLoop]: Abstraction has 2861 states and 4029 transitions. [2024-11-14 03:26:46,406 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:26:46,406 INFO L276 IsEmpty]: Start isEmpty. Operand 2861 states and 4029 transitions. [2024-11-14 03:26:46,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-14 03:26:46,411 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:26:46,411 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:26:46,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 03:26:46,612 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-14 03:26:46,613 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:26:46,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:26:46,614 INFO L85 PathProgramCache]: Analyzing trace with hash 711659841, now seen corresponding path program 1 times [2024-11-14 03:26:46,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:26:46,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787527620] [2024-11-14 03:26:46,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:26:46,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:26:46,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:26:46,721 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:26:46,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:26:46,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787527620] [2024-11-14 03:26:46,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787527620] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:26:46,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820097034] [2024-11-14 03:26:46,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:26:46,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:26:46,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:26:46,724 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:26:46,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 03:26:46,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:26:46,886 INFO L255 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:26:46,888 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:26:46,929 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 03:26:46,929 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:26:46,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820097034] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:26:46,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:26:46,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:26:46,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037100564] [2024-11-14 03:26:46,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:26:46,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:26:46,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:26:46,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:26:46,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:26:46,931 INFO L87 Difference]: Start difference. First operand 2861 states and 4029 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:26:47,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:26:47,483 INFO L93 Difference]: Finished difference Result 7198 states and 10714 transitions. [2024-11-14 03:26:47,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:26:47,484 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 95 [2024-11-14 03:26:47,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:26:47,513 INFO L225 Difference]: With dead ends: 7198 [2024-11-14 03:26:47,513 INFO L226 Difference]: Without dead ends: 4999 [2024-11-14 03:26:47,525 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:26:47,526 INFO L432 NwaCegarLoop]: 225 mSDtfsCounter, 241 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:26:47,526 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 368 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:26:47,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4999 states. [2024-11-14 03:26:48,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4999 to 4977. [2024-11-14 03:26:48,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4977 states, 4000 states have (on average 1.3885) internal successors, (5554), 4027 states have internal predecessors, (5554), 654 states have call successors, (654), 322 states have call predecessors, (654), 321 states have return successors, (909), 629 states have call predecessors, (909), 653 states have call successors, (909) [2024-11-14 03:26:48,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4977 states to 4977 states and 7117 transitions. [2024-11-14 03:26:48,120 INFO L78 Accepts]: Start accepts. Automaton has 4977 states and 7117 transitions. Word has length 95 [2024-11-14 03:26:48,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:26:48,121 INFO L471 AbstractCegarLoop]: Abstraction has 4977 states and 7117 transitions. [2024-11-14 03:26:48,121 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:26:48,121 INFO L276 IsEmpty]: Start isEmpty. Operand 4977 states and 7117 transitions. [2024-11-14 03:26:48,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-14 03:26:48,130 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:26:48,130 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:26:48,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 03:26:48,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:26:48,331 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:26:48,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:26:48,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1350313439, now seen corresponding path program 1 times [2024-11-14 03:26:48,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:26:48,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105450133] [2024-11-14 03:26:48,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:26:48,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:26:48,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:26:48,431 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-14 03:26:48,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:26:48,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105450133] [2024-11-14 03:26:48,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105450133] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:26:48,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:26:48,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:26:48,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140764171] [2024-11-14 03:26:48,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:26:48,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:26:48,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:26:48,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:26:48,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:26:48,433 INFO L87 Difference]: Start difference. First operand 4977 states and 7117 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-14 03:26:49,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:26:49,059 INFO L93 Difference]: Finished difference Result 9475 states and 14010 transitions. [2024-11-14 03:26:49,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:26:49,060 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), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 95 [2024-11-14 03:26:49,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:26:49,105 INFO L225 Difference]: With dead ends: 9475 [2024-11-14 03:26:49,105 INFO L226 Difference]: Without dead ends: 6017 [2024-11-14 03:26:49,122 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 03:26:49,122 INFO L432 NwaCegarLoop]: 310 mSDtfsCounter, 80 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:26:49,122 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 542 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:26:49,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6017 states. [2024-11-14 03:26:49,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6017 to 5649. [2024-11-14 03:26:49,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5649 states, 4640 states have (on average 1.415948275862069) internal successors, (6570), 4667 states have internal predecessors, (6570), 670 states have call successors, (670), 338 states have call predecessors, (670), 337 states have return successors, (925), 645 states have call predecessors, (925), 669 states have call successors, (925) [2024-11-14 03:26:49,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5649 states to 5649 states and 8165 transitions. [2024-11-14 03:26:49,849 INFO L78 Accepts]: Start accepts. Automaton has 5649 states and 8165 transitions. Word has length 95 [2024-11-14 03:26:49,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:26:49,850 INFO L471 AbstractCegarLoop]: Abstraction has 5649 states and 8165 transitions. [2024-11-14 03:26:49,850 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), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-14 03:26:49,850 INFO L276 IsEmpty]: Start isEmpty. Operand 5649 states and 8165 transitions. [2024-11-14 03:26:49,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-14 03:26:49,858 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:26:49,859 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:26:49,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-14 03:26:49,859 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:26:49,859 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:26:49,859 INFO L85 PathProgramCache]: Analyzing trace with hash -288948223, now seen corresponding path program 1 times [2024-11-14 03:26:49,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:26:49,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794467431] [2024-11-14 03:26:49,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:26:49,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:26:49,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:26:49,909 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-14 03:26:49,910 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:26:49,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794467431] [2024-11-14 03:26:49,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794467431] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:26:49,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:26:49,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:26:49,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814505923] [2024-11-14 03:26:49,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:26:49,911 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:26:49,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:26:49,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:26:49,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:26:49,911 INFO L87 Difference]: Start difference. First operand 5649 states and 8165 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2024-11-14 03:26:50,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:26:50,461 INFO L93 Difference]: Finished difference Result 6148 states and 8737 transitions. [2024-11-14 03:26:50,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:26:50,463 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 108 [2024-11-14 03:26:50,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:26:50,517 INFO L225 Difference]: With dead ends: 6148 [2024-11-14 03:26:50,517 INFO L226 Difference]: Without dead ends: 5639 [2024-11-14 03:26:50,521 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 03:26:50,522 INFO L432 NwaCegarLoop]: 265 mSDtfsCounter, 248 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:26:50,522 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 331 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:26:50,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5639 states. [2024-11-14 03:26:51,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5639 to 5630. [2024-11-14 03:26:51,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5630 states, 4623 states have (on average 1.4142331819165044) internal successors, (6538), 4650 states have internal predecessors, (6538), 669 states have call successors, (669), 337 states have call predecessors, (669), 336 states have return successors, (924), 644 states have call predecessors, (924), 668 states have call successors, (924) [2024-11-14 03:26:51,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5630 states to 5630 states and 8131 transitions. [2024-11-14 03:26:51,143 INFO L78 Accepts]: Start accepts. Automaton has 5630 states and 8131 transitions. Word has length 108 [2024-11-14 03:26:51,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:26:51,144 INFO L471 AbstractCegarLoop]: Abstraction has 5630 states and 8131 transitions. [2024-11-14 03:26:51,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2024-11-14 03:26:51,144 INFO L276 IsEmpty]: Start isEmpty. Operand 5630 states and 8131 transitions. [2024-11-14 03:26:51,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-14 03:26:51,154 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:26:51,154 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:26:51,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-14 03:26:51,155 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:26:51,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:26:51,156 INFO L85 PathProgramCache]: Analyzing trace with hash -17801653, now seen corresponding path program 1 times [2024-11-14 03:26:51,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:26:51,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414093876] [2024-11-14 03:26:51,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:26:51,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:26:51,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:26:51,330 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-14 03:26:51,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:26:51,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414093876] [2024-11-14 03:26:51,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414093876] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:26:51,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028126163] [2024-11-14 03:26:51,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:26:51,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:26:51,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:26:51,333 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:26:51,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 03:26:51,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:26:51,469 INFO L255 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 03:26:51,472 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:26:51,554 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 03:26:51,554 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:26:51,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028126163] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:26:51,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:26:51,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2024-11-14 03:26:51,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433227574] [2024-11-14 03:26:51,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:26:51,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 03:26:51,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:26:51,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 03:26:51,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-11-14 03:26:51,557 INFO L87 Difference]: Start difference. First operand 5630 states and 8131 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-14 03:26:52,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:26:52,261 INFO L93 Difference]: Finished difference Result 6150 states and 8725 transitions. [2024-11-14 03:26:52,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 03:26:52,261 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2024-11-14 03:26:52,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:26:52,289 INFO L225 Difference]: With dead ends: 6150 [2024-11-14 03:26:52,289 INFO L226 Difference]: Without dead ends: 5601 [2024-11-14 03:26:52,293 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-11-14 03:26:52,294 INFO L432 NwaCegarLoop]: 254 mSDtfsCounter, 44 mSDsluCounter, 958 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:26:52,295 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 1212 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:26:52,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5601 states. [2024-11-14 03:26:52,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5601 to 5541. [2024-11-14 03:26:52,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5541 states, 4562 states have (on average 1.4177992108724244) internal successors, (6468), 4589 states have internal predecessors, (6468), 654 states have call successors, (654), 324 states have call predecessors, (654), 323 states have return successors, (909), 629 states have call predecessors, (909), 653 states have call successors, (909) [2024-11-14 03:26:52,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5541 states to 5541 states and 8031 transitions. [2024-11-14 03:26:52,871 INFO L78 Accepts]: Start accepts. Automaton has 5541 states and 8031 transitions. Word has length 112 [2024-11-14 03:26:52,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:26:52,871 INFO L471 AbstractCegarLoop]: Abstraction has 5541 states and 8031 transitions. [2024-11-14 03:26:52,871 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-14 03:26:52,872 INFO L276 IsEmpty]: Start isEmpty. Operand 5541 states and 8031 transitions. [2024-11-14 03:26:52,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-14 03:26:52,880 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:26:52,881 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:26:52,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 03:26:53,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-14 03:26:53,081 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:26:53,082 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:26:53,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1483797015, now seen corresponding path program 1 times [2024-11-14 03:26:53,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:26:53,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237716436] [2024-11-14 03:26:53,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:26:53,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:26:53,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:26:53,206 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-14 03:26:53,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:26:53,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237716436] [2024-11-14 03:26:53,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237716436] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:26:53,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:26:53,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 03:26:53,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053744876] [2024-11-14 03:26:53,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:26:53,207 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 03:26:53,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:26:53,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 03:26:53,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:26:53,208 INFO L87 Difference]: Start difference. First operand 5541 states and 8031 transitions. Second operand has 6 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-14 03:26:53,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:26:53,888 INFO L93 Difference]: Finished difference Result 6290 states and 8876 transitions. [2024-11-14 03:26:53,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 03:26:53,889 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2024-11-14 03:26:53,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:26:53,917 INFO L225 Difference]: With dead ends: 6290 [2024-11-14 03:26:53,917 INFO L226 Difference]: Without dead ends: 5833 [2024-11-14 03:26:53,922 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-14 03:26:53,922 INFO L432 NwaCegarLoop]: 259 mSDtfsCounter, 237 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 1096 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:26:53,922 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 1096 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:26:53,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5833 states. [2024-11-14 03:26:54,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5833 to 5799. [2024-11-14 03:26:54,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5799 states, 4724 states have (on average 1.4072819644369179) internal successors, (6648), 4757 states have internal predecessors, (6648), 702 states have call successors, (702), 366 states have call predecessors, (702), 371 states have return successors, (969), 677 states have call predecessors, (969), 701 states have call successors, (969) [2024-11-14 03:26:54,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5799 states to 5799 states and 8319 transitions. [2024-11-14 03:26:54,926 INFO L78 Accepts]: Start accepts. Automaton has 5799 states and 8319 transitions. Word has length 113 [2024-11-14 03:26:54,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:26:54,927 INFO L471 AbstractCegarLoop]: Abstraction has 5799 states and 8319 transitions. [2024-11-14 03:26:54,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-14 03:26:54,927 INFO L276 IsEmpty]: Start isEmpty. Operand 5799 states and 8319 transitions. [2024-11-14 03:26:54,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-11-14 03:26:54,941 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:26:54,942 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:26:54,942 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-14 03:26:54,942 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:26:54,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:26:54,942 INFO L85 PathProgramCache]: Analyzing trace with hash 210645851, now seen corresponding path program 1 times [2024-11-14 03:26:54,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:26:54,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182722791] [2024-11-14 03:26:54,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:26:54,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:26:54,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:26:55,821 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-14 03:26:55,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:26:55,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182722791] [2024-11-14 03:26:55,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182722791] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:26:55,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874356934] [2024-11-14 03:26:55,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:26:55,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:26:55,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:26:55,824 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:26:55,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 03:26:55,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:26:55,967 INFO L255 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-14 03:26:55,972 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:26:56,917 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 51 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 03:26:56,918 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:26:58,674 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-14 03:26:58,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874356934] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:26:58,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [956857048] [2024-11-14 03:26:58,677 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2024-11-14 03:26:58,677 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:26:58,678 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:26:58,678 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:26:58,678 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:27:19,827 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 200 for LOIs [2024-11-14 03:27:20,058 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 13 for LOIs [2024-11-14 03:27:20,059 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2024-11-14 03:27:20,064 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 164 for LOIs [2024-11-14 03:27:20,832 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 165 for LOIs [2024-11-14 03:27:21,484 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 21 for LOIs [2024-11-14 03:27:21,510 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 158 for LOIs [2024-11-14 03:27:21,681 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 169 for LOIs [2024-11-14 03:27:21,811 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:27:34,586 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '130369#(and (= ~q_req_up~0 1) (= ~q_free~0 1) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~p_last_write~0))' at error location [2024-11-14 03:27:34,586 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:27:34,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:27:34,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 17] total 50 [2024-11-14 03:27:34,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421565409] [2024-11-14 03:27:34,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:27:34,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-14 03:27:34,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:27:34,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-14 03:27:34,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=818, Invalid=8884, Unknown=0, NotChecked=0, Total=9702 [2024-11-14 03:27:34,590 INFO L87 Difference]: Start difference. First operand 5799 states and 8319 transitions. Second operand has 50 states, 31 states have (on average 5.419354838709677) internal successors, (168), 38 states have internal predecessors, (168), 20 states have call successors, (41), 15 states have call predecessors, (41), 23 states have return successors, (43), 18 states have call predecessors, (43), 20 states have call successors, (43) [2024-11-14 03:27:44,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:27:44,617 INFO L93 Difference]: Finished difference Result 7922 states and 10891 transitions. [2024-11-14 03:27:44,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2024-11-14 03:27:44,617 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 31 states have (on average 5.419354838709677) internal successors, (168), 38 states have internal predecessors, (168), 20 states have call successors, (41), 15 states have call predecessors, (41), 23 states have return successors, (43), 18 states have call predecessors, (43), 20 states have call successors, (43) Word has length 114 [2024-11-14 03:27:44,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:27:44,646 INFO L225 Difference]: With dead ends: 7922 [2024-11-14 03:27:44,646 INFO L226 Difference]: Without dead ends: 7207 [2024-11-14 03:27:44,660 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 278 SyntacticMatches, 12 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 18450 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=5867, Invalid=43195, Unknown=0, NotChecked=0, Total=49062 [2024-11-14 03:27:44,661 INFO L432 NwaCegarLoop]: 230 mSDtfsCounter, 4477 mSDsluCounter, 2962 mSDsCounter, 0 mSdLazyCounter, 4182 mSolverCounterSat, 2174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4477 SdHoareTripleChecker+Valid, 3192 SdHoareTripleChecker+Invalid, 6356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2174 IncrementalHoareTripleChecker+Valid, 4182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:27:44,661 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4477 Valid, 3192 Invalid, 6356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2174 Valid, 4182 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-11-14 03:27:44,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7207 states. [2024-11-14 03:27:45,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7207 to 5799. [2024-11-14 03:27:45,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5799 states, 4724 states have (on average 1.4064352243861136) internal successors, (6644), 4757 states have internal predecessors, (6644), 702 states have call successors, (702), 366 states have call predecessors, (702), 371 states have return successors, (969), 677 states have call predecessors, (969), 701 states have call successors, (969) [2024-11-14 03:27:45,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5799 states to 5799 states and 8315 transitions. [2024-11-14 03:27:45,423 INFO L78 Accepts]: Start accepts. Automaton has 5799 states and 8315 transitions. Word has length 114 [2024-11-14 03:27:45,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:27:45,424 INFO L471 AbstractCegarLoop]: Abstraction has 5799 states and 8315 transitions. [2024-11-14 03:27:45,424 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 31 states have (on average 5.419354838709677) internal successors, (168), 38 states have internal predecessors, (168), 20 states have call successors, (41), 15 states have call predecessors, (41), 23 states have return successors, (43), 18 states have call predecessors, (43), 20 states have call successors, (43) [2024-11-14 03:27:45,424 INFO L276 IsEmpty]: Start isEmpty. Operand 5799 states and 8315 transitions. [2024-11-14 03:27:45,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-11-14 03:27:45,433 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:27:45,433 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:27:45,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 03:27:45,637 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:27:45,638 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:27:45,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:27:45,638 INFO L85 PathProgramCache]: Analyzing trace with hash 297646396, now seen corresponding path program 1 times [2024-11-14 03:27:45,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:27:45,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627706128] [2024-11-14 03:27:45,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:27:45,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:27:45,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:27:45,945 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 03:27:45,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:27:45,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627706128] [2024-11-14 03:27:45,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627706128] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:27:45,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436393703] [2024-11-14 03:27:45,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:27:45,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:27:45,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:27:45,948 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:27:45,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 03:27:46,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:27:46,082 INFO L255 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-14 03:27:46,085 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:27:46,175 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 03:27:46,176 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:27:46,393 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-14 03:27:46,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436393703] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 03:27:46,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:27:46,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2024-11-14 03:27:46,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531080748] [2024-11-14 03:27:46,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:27:46,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 03:27:46,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:27:46,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 03:27:46,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2024-11-14 03:27:46,394 INFO L87 Difference]: Start difference. First operand 5799 states and 8315 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-14 03:27:47,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:27:47,685 INFO L93 Difference]: Finished difference Result 6671 states and 9324 transitions. [2024-11-14 03:27:47,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 03:27:47,686 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2024-11-14 03:27:47,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:27:47,710 INFO L225 Difference]: With dead ends: 6671 [2024-11-14 03:27:47,710 INFO L226 Difference]: Without dead ends: 5956 [2024-11-14 03:27:47,714 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2024-11-14 03:27:47,715 INFO L432 NwaCegarLoop]: 211 mSDtfsCounter, 353 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:27:47,715 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 724 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 800 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:27:47,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5956 states. [2024-11-14 03:27:48,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5956 to 5778. [2024-11-14 03:27:48,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5778 states, 4696 states have (on average 1.4073679727427597) internal successors, (6609), 4732 states have internal predecessors, (6609), 705 states have call successors, (705), 363 states have call predecessors, (705), 375 states have return successors, (988), 684 states have call predecessors, (988), 704 states have call successors, (988) [2024-11-14 03:27:48,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5778 states to 5778 states and 8302 transitions. [2024-11-14 03:27:48,469 INFO L78 Accepts]: Start accepts. Automaton has 5778 states and 8302 transitions. Word has length 115 [2024-11-14 03:27:48,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:27:48,469 INFO L471 AbstractCegarLoop]: Abstraction has 5778 states and 8302 transitions. [2024-11-14 03:27:48,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-14 03:27:48,470 INFO L276 IsEmpty]: Start isEmpty. Operand 5778 states and 8302 transitions. [2024-11-14 03:27:48,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-14 03:27:48,480 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:27:48,480 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:27:48,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-14 03:27:48,684 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:27:48,685 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:27:48,685 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:27:48,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1527208649, now seen corresponding path program 1 times [2024-11-14 03:27:48,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:27:48,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265691476] [2024-11-14 03:27:48,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:27:48,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:27:48,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:27:49,665 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-14 03:27:49,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:27:49,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265691476] [2024-11-14 03:27:49,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265691476] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:27:49,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461691410] [2024-11-14 03:27:49,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:27:49,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:27:49,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:27:49,668 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:27:49,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 03:27:49,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:27:49,812 INFO L255 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-14 03:27:49,816 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:27:50,954 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:27:50,954 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:27:53,261 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 10 proven. 47 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-14 03:27:53,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461691410] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:27:53,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [302109136] [2024-11-14 03:27:53,265 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2024-11-14 03:27:53,265 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:27:53,265 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:27:53,265 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:27:53,265 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:28:05,608 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 201 for LOIs [2024-11-14 03:28:05,823 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 77 for LOIs [2024-11-14 03:28:05,846 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2024-11-14 03:28:05,849 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 165 for LOIs [2024-11-14 03:28:06,544 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 166 for LOIs [2024-11-14 03:28:07,389 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 21 for LOIs [2024-11-14 03:28:07,414 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 159 for LOIs [2024-11-14 03:28:07,527 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 170 for LOIs [2024-11-14 03:28:07,655 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:28:24,792 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '167051#(and (= ~q_req_up~0 1) (= ~q_free~0 1) (= ~c_dr_pc~0 1) (exists ((v_~q_free~0_108 Int) (v_~q_req_up~0_109 Int)) (and (or (= ~p_dw_st~0 0) (exists ((v_~p_dw_pc~0_50 Int) (v_~p_dw_st~0_140 Int)) (and (or (and (= v_~p_dw_st~0_140 1) (= v_~p_dw_pc~0_50 0)) (and (<= ~q_buf_0~0 2147483647) (= v_~q_req_up~0_109 1) (= v_~p_dw_st~0_140 1) (<= 0 (+ ~q_buf_0~0 2147483648)))) (or (and (exists ((|v_ULTIMATE.start_eval1_~tmp~2#1_70| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp~2#1_70| 0)) (<= |v_ULTIMATE.start_eval1_~tmp~2#1_70| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp~2#1_70| 2147483648)))) (= v_~p_dw_pc~0_50 1)) (and (exists ((|v_ULTIMATE.start_eval1_~tmp~2#1_70| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp~2#1_70| 0)) (<= |v_ULTIMATE.start_eval1_~tmp~2#1_70| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp~2#1_70| 2147483648)))) (= v_~p_dw_pc~0_50 0)))))) (or (and (= ~p_dw_pc~0 1) (= 2 ~p_dw_st~0) (= v_~q_free~0_108 0)) (and (<= v_~q_free~0_108 1) (<= 0 ~p_dw_pc~0) (= ~p_dw_st~0 0))))) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~q_buf_0~0) (= ~c_last_read~0 ~p_last_write~0) (exists ((|v_ULTIMATE.start_eval1_~tmp___0~2#1_44| Int)) (and (<= |v_ULTIMATE.start_eval1_~tmp___0~2#1_44| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp___0~2#1_44| 2147483648)) (not (= |v_ULTIMATE.start_eval1_~tmp___0~2#1_44| 0)))) (= ~c_dr_st~0 1))' at error location [2024-11-14 03:28:24,792 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:28:24,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:28:24,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 21] total 59 [2024-11-14 03:28:24,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632297806] [2024-11-14 03:28:24,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:28:24,793 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-14 03:28:24,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:28:24,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-14 03:28:24,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1056, Invalid=11376, Unknown=0, NotChecked=0, Total=12432 [2024-11-14 03:28:24,797 INFO L87 Difference]: Start difference. First operand 5778 states and 8302 transitions. Second operand has 59 states, 39 states have (on average 5.512820512820513) internal successors, (215), 43 states have internal predecessors, (215), 26 states have call successors, (49), 18 states have call predecessors, (49), 23 states have return successors, (51), 25 states have call predecessors, (51), 26 states have call successors, (51) [2024-11-14 03:28:56,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:28:56,114 INFO L93 Difference]: Finished difference Result 9813 states and 13040 transitions. [2024-11-14 03:28:56,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 363 states. [2024-11-14 03:28:56,114 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 39 states have (on average 5.512820512820513) internal successors, (215), 43 states have internal predecessors, (215), 26 states have call successors, (49), 18 states have call predecessors, (49), 23 states have return successors, (51), 25 states have call predecessors, (51), 26 states have call successors, (51) Word has length 124 [2024-11-14 03:28:56,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:28:56,152 INFO L225 Difference]: With dead ends: 9813 [2024-11-14 03:28:56,153 INFO L226 Difference]: Without dead ends: 9122 [2024-11-14 03:28:56,189 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 832 GetRequests, 362 SyntacticMatches, 3 SemanticMatches, 467 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 96044 ImplicationChecksByTransitivity, 39.4s TimeCoverageRelationStatistics Valid=22485, Invalid=197007, Unknown=0, NotChecked=0, Total=219492 [2024-11-14 03:28:56,190 INFO L432 NwaCegarLoop]: 211 mSDtfsCounter, 7857 mSDsluCounter, 3574 mSDsCounter, 0 mSdLazyCounter, 8885 mSolverCounterSat, 4034 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7862 SdHoareTripleChecker+Valid, 3785 SdHoareTripleChecker+Invalid, 12919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4034 IncrementalHoareTripleChecker+Valid, 8885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:28:56,190 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7862 Valid, 3785 Invalid, 12919 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4034 Valid, 8885 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2024-11-14 03:28:56,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9122 states. [2024-11-14 03:28:57,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9122 to 7288. [2024-11-14 03:28:57,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7288 states, 5755 states have (on average 1.3588184187662902) internal successors, (7820), 5803 states have internal predecessors, (7820), 932 states have call successors, (932), 551 states have call predecessors, (932), 599 states have return successors, (1271), 935 states have call predecessors, (1271), 931 states have call successors, (1271) [2024-11-14 03:28:57,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7288 states to 7288 states and 10023 transitions. [2024-11-14 03:28:57,440 INFO L78 Accepts]: Start accepts. Automaton has 7288 states and 10023 transitions. Word has length 124 [2024-11-14 03:28:57,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:28:57,441 INFO L471 AbstractCegarLoop]: Abstraction has 7288 states and 10023 transitions. [2024-11-14 03:28:57,441 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 39 states have (on average 5.512820512820513) internal successors, (215), 43 states have internal predecessors, (215), 26 states have call successors, (49), 18 states have call predecessors, (49), 23 states have return successors, (51), 25 states have call predecessors, (51), 26 states have call successors, (51) [2024-11-14 03:28:57,441 INFO L276 IsEmpty]: Start isEmpty. Operand 7288 states and 10023 transitions. [2024-11-14 03:28:57,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-14 03:28:57,451 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:28:57,451 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:28:57,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 03:28:57,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-14 03:28:57,652 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:28:57,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:28:57,652 INFO L85 PathProgramCache]: Analyzing trace with hash -785983324, now seen corresponding path program 1 times [2024-11-14 03:28:57,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:28:57,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30010970] [2024-11-14 03:28:57,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:28:57,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:28:57,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:28:57,852 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-14 03:28:57,852 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:28:57,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30010970] [2024-11-14 03:28:57,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30010970] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:28:57,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127888078] [2024-11-14 03:28:57,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:28:57,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:28:57,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:28:57,855 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:28:57,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 03:28:58,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:28:58,004 INFO L255 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-14 03:28:58,008 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:28:58,140 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-14 03:28:58,141 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:28:58,371 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-14 03:28:58,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127888078] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 03:28:58,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:28:58,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2024-11-14 03:28:58,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540441837] [2024-11-14 03:28:58,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:28:58,372 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 03:28:58,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:28:58,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 03:28:58,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-14 03:28:58,373 INFO L87 Difference]: Start difference. First operand 7288 states and 10023 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-14 03:28:59,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:28:59,546 INFO L93 Difference]: Finished difference Result 7730 states and 10515 transitions. [2024-11-14 03:28:59,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 03:28:59,547 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2024-11-14 03:28:59,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:28:59,575 INFO L225 Difference]: With dead ends: 7730 [2024-11-14 03:28:59,575 INFO L226 Difference]: Without dead ends: 4993 [2024-11-14 03:28:59,583 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2024-11-14 03:28:59,586 INFO L432 NwaCegarLoop]: 191 mSDtfsCounter, 542 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:28:59,586 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [543 Valid, 448 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 03:28:59,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4993 states. [2024-11-14 03:29:00,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4993 to 4993. [2024-11-14 03:29:00,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4993 states, 4160 states have (on average 1.4432692307692307) internal successors, (6004), 4185 states have internal predecessors, (6004), 576 states have call successors, (576), 256 states have call predecessors, (576), 256 states have return successors, (832), 552 states have call predecessors, (832), 576 states have call successors, (832) [2024-11-14 03:29:00,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4993 states to 4993 states and 7412 transitions. [2024-11-14 03:29:00,376 INFO L78 Accepts]: Start accepts. Automaton has 4993 states and 7412 transitions. Word has length 125 [2024-11-14 03:29:00,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:29:00,376 INFO L471 AbstractCegarLoop]: Abstraction has 4993 states and 7412 transitions. [2024-11-14 03:29:00,377 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-14 03:29:00,377 INFO L276 IsEmpty]: Start isEmpty. Operand 4993 states and 7412 transitions. [2024-11-14 03:29:00,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-11-14 03:29:00,389 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:29:00,389 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:29:00,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 03:29:00,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-14 03:29:00,589 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:29:00,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:29:00,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1233192458, now seen corresponding path program 1 times [2024-11-14 03:29:00,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:29:00,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560622073] [2024-11-14 03:29:00,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:29:00,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:29:00,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:29:00,657 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-14 03:29:00,658 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:29:00,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560622073] [2024-11-14 03:29:00,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560622073] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:29:00,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:29:00,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:29:00,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768298975] [2024-11-14 03:29:00,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:29:00,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:29:00,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:29:00,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:29:00,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:29:00,660 INFO L87 Difference]: Start difference. First operand 4993 states and 7412 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 03:29:01,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:29:01,794 INFO L93 Difference]: Finished difference Result 14790 states and 22373 transitions. [2024-11-14 03:29:01,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:29:01,795 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 128 [2024-11-14 03:29:01,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:29:01,828 INFO L225 Difference]: With dead ends: 14790 [2024-11-14 03:29:01,829 INFO L226 Difference]: Without dead ends: 9803 [2024-11-14 03:29:01,848 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 03:29:01,849 INFO L432 NwaCegarLoop]: 154 mSDtfsCounter, 150 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:29:01,849 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 297 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:29:01,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9803 states. [2024-11-14 03:29:03,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9803 to 9745. [2024-11-14 03:29:03,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9745 states, 8124 states have (on average 1.430329886755293) internal successors, (11620), 8173 states have internal predecessors, (11620), 1108 states have call successors, (1108), 512 states have call predecessors, (1108), 512 states have return successors, (1588), 1060 states have call predecessors, (1588), 1108 states have call successors, (1588) [2024-11-14 03:29:03,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9745 states to 9745 states and 14316 transitions. [2024-11-14 03:29:03,071 INFO L78 Accepts]: Start accepts. Automaton has 9745 states and 14316 transitions. Word has length 128 [2024-11-14 03:29:03,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:29:03,072 INFO L471 AbstractCegarLoop]: Abstraction has 9745 states and 14316 transitions. [2024-11-14 03:29:03,072 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 03:29:03,072 INFO L276 IsEmpty]: Start isEmpty. Operand 9745 states and 14316 transitions. [2024-11-14 03:29:03,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-11-14 03:29:03,089 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:29:03,089 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:29:03,089 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-14 03:29:03,089 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:29:03,090 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:29:03,090 INFO L85 PathProgramCache]: Analyzing trace with hash -729062777, now seen corresponding path program 1 times [2024-11-14 03:29:03,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:29:03,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856044957] [2024-11-14 03:29:03,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:29:03,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:29:03,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:29:03,145 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-14 03:29:03,146 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:29:03,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856044957] [2024-11-14 03:29:03,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856044957] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:29:03,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:29:03,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:29:03,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133388036] [2024-11-14 03:29:03,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:29:03,147 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:29:03,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:29:03,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:29:03,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:29:03,147 INFO L87 Difference]: Start difference. First operand 9745 states and 14316 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 03:29:04,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:29:04,738 INFO L93 Difference]: Finished difference Result 28870 states and 43169 transitions. [2024-11-14 03:29:04,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:29:04,739 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 128 [2024-11-14 03:29:04,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:29:04,786 INFO L225 Difference]: With dead ends: 28870 [2024-11-14 03:29:04,786 INFO L226 Difference]: Without dead ends: 19131 [2024-11-14 03:29:04,813 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 03:29:04,813 INFO L432 NwaCegarLoop]: 154 mSDtfsCounter, 153 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:29:04,814 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 297 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:29:04,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19131 states. [2024-11-14 03:29:06,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19131 to 19017. [2024-11-14 03:29:06,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19017 states, 15860 states have (on average 1.4166456494325346) internal successors, (22468), 15957 states have internal predecessors, (22468), 2132 states have call successors, (2132), 1024 states have call predecessors, (2132), 1024 states have return successors, (3028), 2036 states have call predecessors, (3028), 2132 states have call successors, (3028) [2024-11-14 03:29:06,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19017 states to 19017 states and 27628 transitions. [2024-11-14 03:29:06,998 INFO L78 Accepts]: Start accepts. Automaton has 19017 states and 27628 transitions. Word has length 128 [2024-11-14 03:29:06,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:29:06,998 INFO L471 AbstractCegarLoop]: Abstraction has 19017 states and 27628 transitions. [2024-11-14 03:29:06,998 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 03:29:06,998 INFO L276 IsEmpty]: Start isEmpty. Operand 19017 states and 27628 transitions. [2024-11-14 03:29:07,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2024-11-14 03:29:07,046 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:29:07,047 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:29:07,048 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-14 03:29:07,048 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:29:07,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:29:07,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1536754074, now seen corresponding path program 1 times [2024-11-14 03:29:07,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:29:07,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099115243] [2024-11-14 03:29:07,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:29:07,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:29:07,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:29:07,163 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-14 03:29:07,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:29:07,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099115243] [2024-11-14 03:29:07,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099115243] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:29:07,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837913174] [2024-11-14 03:29:07,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:29:07,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:29:07,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:29:07,166 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:29:07,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 03:29:07,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:29:07,369 INFO L255 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:29:07,373 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:29:07,446 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-14 03:29:07,447 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:29:07,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837913174] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:29:07,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:29:07,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-14 03:29:07,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627583470] [2024-11-14 03:29:07,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:29:07,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:29:07,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:29:07,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:29:07,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:29:07,448 INFO L87 Difference]: Start difference. First operand 19017 states and 27628 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-14 03:29:09,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:29:09,992 INFO L93 Difference]: Finished difference Result 34916 states and 50801 transitions. [2024-11-14 03:29:09,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:29:09,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 149 [2024-11-14 03:29:09,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:29:10,094 INFO L225 Difference]: With dead ends: 34916 [2024-11-14 03:29:10,094 INFO L226 Difference]: Without dead ends: 23698 [2024-11-14 03:29:10,144 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 149 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 03:29:10,145 INFO L432 NwaCegarLoop]: 175 mSDtfsCounter, 144 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:29:10,145 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 214 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:29:10,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23698 states. [2024-11-14 03:29:12,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23698 to 23698. [2024-11-14 03:29:12,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23698 states, 20066 states have (on average 1.3819395993222365) internal successors, (27730), 20163 states have internal predecessors, (27730), 2289 states have call successors, (2289), 1341 states have call predecessors, (2289), 1342 states have return successors, (3311), 2194 states have call predecessors, (3311), 2289 states have call successors, (3311) [2024-11-14 03:29:12,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23698 states to 23698 states and 33330 transitions. [2024-11-14 03:29:12,832 INFO L78 Accepts]: Start accepts. Automaton has 23698 states and 33330 transitions. Word has length 149 [2024-11-14 03:29:12,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:29:12,833 INFO L471 AbstractCegarLoop]: Abstraction has 23698 states and 33330 transitions. [2024-11-14 03:29:12,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-14 03:29:12,833 INFO L276 IsEmpty]: Start isEmpty. Operand 23698 states and 33330 transitions. [2024-11-14 03:29:12,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2024-11-14 03:29:12,882 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:29:12,882 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:29:12,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-14 03:29:13,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-14 03:29:13,083 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:29:13,083 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:29:13,083 INFO L85 PathProgramCache]: Analyzing trace with hash 993396613, now seen corresponding path program 1 times [2024-11-14 03:29:13,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:29:13,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232425246] [2024-11-14 03:29:13,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:29:13,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:29:13,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:29:13,196 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2024-11-14 03:29:13,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:29:13,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232425246] [2024-11-14 03:29:13,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232425246] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:29:13,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487812830] [2024-11-14 03:29:13,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:29:13,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:29:13,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:29:13,200 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:29:13,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 03:29:13,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:29:13,421 INFO L255 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:29:13,424 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:29:13,457 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-14 03:29:13,457 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:29:13,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487812830] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:29:13,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:29:13,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-14 03:29:13,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409520830] [2024-11-14 03:29:13,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:29:13,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:29:13,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:29:13,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:29:13,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:29:13,461 INFO L87 Difference]: Start difference. First operand 23698 states and 33330 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-14 03:29:16,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:29:16,872 INFO L93 Difference]: Finished difference Result 45411 states and 64700 transitions. [2024-11-14 03:29:16,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:29:16,873 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 149 [2024-11-14 03:29:16,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:29:16,989 INFO L225 Difference]: With dead ends: 45411 [2024-11-14 03:29:16,989 INFO L226 Difference]: Without dead ends: 33345 [2024-11-14 03:29:17,027 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:29:17,027 INFO L432 NwaCegarLoop]: 267 mSDtfsCounter, 117 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:29:17,028 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 428 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:29:17,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33345 states. [2024-11-14 03:29:21,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33345 to 27794. [2024-11-14 03:29:21,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27794 states, 23938 states have (on average 1.4090567298855377) internal successors, (33730), 24035 states have internal predecessors, (33730), 2401 states have call successors, (2401), 1453 states have call predecessors, (2401), 1454 states have return successors, (3423), 2306 states have call predecessors, (3423), 2401 states have call successors, (3423) [2024-11-14 03:29:21,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27794 states to 27794 states and 39554 transitions. [2024-11-14 03:29:21,146 INFO L78 Accepts]: Start accepts. Automaton has 27794 states and 39554 transitions. Word has length 149 [2024-11-14 03:29:21,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:29:21,146 INFO L471 AbstractCegarLoop]: Abstraction has 27794 states and 39554 transitions. [2024-11-14 03:29:21,146 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-14 03:29:21,147 INFO L276 IsEmpty]: Start isEmpty. Operand 27794 states and 39554 transitions. [2024-11-14 03:29:21,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2024-11-14 03:29:21,190 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:29:21,191 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:29:21,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-14 03:29:21,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-14 03:29:21,391 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:29:21,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:29:21,391 INFO L85 PathProgramCache]: Analyzing trace with hash 2039448651, now seen corresponding path program 2 times [2024-11-14 03:29:21,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:29:21,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143921354] [2024-11-14 03:29:21,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:29:21,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:29:21,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:29:21,570 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2024-11-14 03:29:21,571 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:29:21,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143921354] [2024-11-14 03:29:21,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143921354] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:29:21,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631085562] [2024-11-14 03:29:21,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:29:21,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:29:21,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:29:21,574 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:29:21,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd27bed-4496-40b8-a418-76b9e44ad52c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 03:29:21,724 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 03:29:21,724 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:29:21,727 INFO L255 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 03:29:21,730 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:29:21,775 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 03:29:21,776 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:29:21,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631085562] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:29:21,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:29:21,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2024-11-14 03:29:21,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603694938] [2024-11-14 03:29:21,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:29:21,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:29:21,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:29:21,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:29:21,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-14 03:29:21,777 INFO L87 Difference]: Start difference. First operand 27794 states and 39554 transitions. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-14 03:29:27,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:29:27,289 INFO L93 Difference]: Finished difference Result 82112 states and 116711 transitions. [2024-11-14 03:29:27,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:29:27,290 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 149 [2024-11-14 03:29:27,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted.