./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.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_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/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_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/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_0a9cef5f-2d80-4873-9044-a97ba62f7303/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 030c097c5e5981a6b9166b6af780aa84c84c48bf3e4236dc73dc256776dad070 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 03:45:21,436 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 03:45:21,554 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 03:45:21,565 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 03:45:21,565 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 03:45:21,607 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 03:45:21,608 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 03:45:21,609 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 03:45:21,609 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 03:45:21,609 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 03:45:21,609 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 03:45:21,610 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 03:45:21,610 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 03:45:21,610 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 03:45:21,610 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 03:45:21,610 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 03:45:21,611 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 03:45:21,611 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 03:45:21,611 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 03:45:21,611 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 03:45:21,612 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 03:45:21,612 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 03:45:21,612 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 03:45:21,612 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 03:45:21,613 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 03:45:21,613 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 03:45:21,613 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 03:45:21,613 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 03:45:21,613 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 03:45:21,614 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 03:45:21,614 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 03:45:21,614 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 03:45:21,614 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 03:45:21,614 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 03:45:21,614 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 03:45:21,615 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 03:45:21,615 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 03:45:21,615 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 03:45:21,615 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:45:21,616 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 03:45:21,616 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 03:45:21,616 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 03:45:21,616 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 03:45:21,616 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 03:45:21,616 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 03:45:21,617 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 03:45:21,617 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 03:45:21,617 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_0a9cef5f-2d80-4873-9044-a97ba62f7303/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 -> 030c097c5e5981a6b9166b6af780aa84c84c48bf3e4236dc73dc256776dad070 [2024-11-14 03:45:21,988 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 03:45:22,008 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 03:45:22,013 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 03:45:22,015 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 03:45:22,015 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 03:45:22,019 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-2.c Unable to find full path for "g++" [2024-11-14 03:45:24,223 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 03:45:24,643 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 03:45:24,644 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-2.c [2024-11-14 03:45:24,682 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/data/60f490fdb/0dd4b291a343487ba9b996ae096b9256/FLAGf0b5bf174 [2024-11-14 03:45:24,706 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/data/60f490fdb/0dd4b291a343487ba9b996ae096b9256 [2024-11-14 03:45:24,709 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 03:45:24,710 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 03:45:24,712 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 03:45:24,712 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 03:45:24,718 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 03:45:24,719 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:45:24" (1/1) ... [2024-11-14 03:45:24,720 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e56aace and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:45:24, skipping insertion in model container [2024-11-14 03:45:24,720 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:45:24" (1/1) ... [2024-11-14 03:45:24,769 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 03:45:24,946 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_0a9cef5f-2d80-4873-9044-a97ba62f7303/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-2.c[914,927] [2024-11-14 03:45:25,059 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_0a9cef5f-2d80-4873-9044-a97ba62f7303/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-2.c[7115,7128] [2024-11-14 03:45:25,281 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:45:25,301 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 03:45:25,321 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_0a9cef5f-2d80-4873-9044-a97ba62f7303/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-2.c[914,927] [2024-11-14 03:45:25,358 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_0a9cef5f-2d80-4873-9044-a97ba62f7303/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-2.c[7115,7128] [2024-11-14 03:45:25,483 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:45:25,522 INFO L204 MainTranslator]: Completed translation [2024-11-14 03:45:25,523 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:45:25 WrapperNode [2024-11-14 03:45:25,523 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 03:45:25,524 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 03:45:25,524 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 03:45:25,525 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 03:45:25,531 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:45:25" (1/1) ... [2024-11-14 03:45:25,547 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:45:25" (1/1) ... [2024-11-14 03:45:25,602 INFO L138 Inliner]: procedures = 79, calls = 96, calls flagged for inlining = 48, calls inlined = 48, statements flattened = 1108 [2024-11-14 03:45:25,602 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 03:45:25,603 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 03:45:25,603 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 03:45:25,603 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 03:45:25,611 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:45:25" (1/1) ... [2024-11-14 03:45:25,612 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:45:25" (1/1) ... [2024-11-14 03:45:25,617 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:45:25" (1/1) ... [2024-11-14 03:45:25,617 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:45:25" (1/1) ... [2024-11-14 03:45:25,633 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:45:25" (1/1) ... [2024-11-14 03:45:25,650 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:45:25" (1/1) ... [2024-11-14 03:45:25,653 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:45:25" (1/1) ... [2024-11-14 03:45:25,657 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:45:25" (1/1) ... [2024-11-14 03:45:25,663 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 03:45:25,664 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 03:45:25,664 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 03:45:25,664 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 03:45:25,666 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:45:25" (1/1) ... [2024-11-14 03:45:25,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:45:25,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:45:25,700 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 03:45:25,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 03:45:25,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 03:45:25,734 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-14 03:45:25,734 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-14 03:45:25,734 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2024-11-14 03:45:25,734 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2024-11-14 03:45:25,734 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2024-11-14 03:45:25,734 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2024-11-14 03:45:25,734 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2024-11-14 03:45:25,734 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2024-11-14 03:45:25,735 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2024-11-14 03:45:25,735 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2024-11-14 03:45:25,735 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2024-11-14 03:45:25,735 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2024-11-14 03:45:25,735 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2024-11-14 03:45:25,735 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2024-11-14 03:45:25,735 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2024-11-14 03:45:25,735 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2024-11-14 03:45:25,735 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2024-11-14 03:45:25,735 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2024-11-14 03:45:25,735 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2024-11-14 03:45:25,735 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2024-11-14 03:45:25,736 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2024-11-14 03:45:25,736 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2024-11-14 03:45:25,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 03:45:25,736 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2024-11-14 03:45:25,736 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2024-11-14 03:45:25,736 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2024-11-14 03:45:25,736 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2024-11-14 03:45:25,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 03:45:25,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 03:45:25,736 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2024-11-14 03:45:25,736 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2024-11-14 03:45:25,915 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 03:45:25,918 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 03:45:27,568 INFO L? ?]: Removed 133 outVars from TransFormulas that were not future-live. [2024-11-14 03:45:27,568 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 03:45:28,618 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 03:45:28,618 INFO L316 CfgBuilder]: Removed 20 assume(true) statements. [2024-11-14 03:45:28,623 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:45:28 BoogieIcfgContainer [2024-11-14 03:45:28,623 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 03:45:28,628 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 03:45:28,628 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 03:45:28,635 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 03:45:28,635 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 03:45:24" (1/3) ... [2024-11-14 03:45:28,636 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79db6983 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:45:28, skipping insertion in model container [2024-11-14 03:45:28,636 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:45:25" (2/3) ... [2024-11-14 03:45:28,638 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79db6983 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:45:28, skipping insertion in model container [2024-11-14 03:45:28,639 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:45:28" (3/3) ... [2024-11-14 03:45:28,641 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.13.cil-2.c [2024-11-14 03:45:28,666 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 03:45:28,671 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG pc_sfifo_2.cil-1+token_ring.13.cil-2.c that has 15 procedures, 285 locations, 1 initial locations, 20 loop locations, and 2 error locations. [2024-11-14 03:45:28,776 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 03:45:28,797 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;@31312a3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 03:45:28,797 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-14 03:45:28,804 INFO L276 IsEmpty]: Start isEmpty. Operand has 285 states, 227 states have (on average 1.5110132158590308) internal successors, (343), 233 states have internal predecessors, (343), 41 states have call successors, (41), 14 states have call predecessors, (41), 14 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2024-11-14 03:45:28,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-14 03:45:28,820 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:45:28,821 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 03:45:28,821 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:45:28,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:45:28,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1928129327, now seen corresponding path program 1 times [2024-11-14 03:45:28,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:45:28,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74677572] [2024-11-14 03:45:28,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:45:28,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:45:29,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:45:29,441 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 03:45:29,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:45:29,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74677572] [2024-11-14 03:45:29,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74677572] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:45:29,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:45:29,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 03:45:29,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864014175] [2024-11-14 03:45:29,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:45:29,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:45:29,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:45:29,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:45:29,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:45:29,488 INFO L87 Difference]: Start difference. First operand has 285 states, 227 states have (on average 1.5110132158590308) internal successors, (343), 233 states have internal predecessors, (343), 41 states have call successors, (41), 14 states have call predecessors, (41), 14 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) 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 03:45:30,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:45:30,294 INFO L93 Difference]: Finished difference Result 621 states and 921 transitions. [2024-11-14 03:45:30,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:45:30,298 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 03:45:30,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:45:30,317 INFO L225 Difference]: With dead ends: 621 [2024-11-14 03:45:30,317 INFO L226 Difference]: Without dead ends: 340 [2024-11-14 03:45:30,324 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 03:45:30,329 INFO L432 NwaCegarLoop]: 402 mSDtfsCounter, 473 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:45:30,332 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 704 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:45:30,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2024-11-14 03:45:30,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 333. [2024-11-14 03:45:30,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 262 states have (on average 1.4351145038167938) internal successors, (376), 266 states have internal predecessors, (376), 49 states have call successors, (49), 21 states have call predecessors, (49), 20 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2024-11-14 03:45:30,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 472 transitions. [2024-11-14 03:45:30,508 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 472 transitions. Word has length 45 [2024-11-14 03:45:30,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:45:30,509 INFO L471 AbstractCegarLoop]: Abstraction has 333 states and 472 transitions. [2024-11-14 03:45:30,509 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 03:45:30,509 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 472 transitions. [2024-11-14 03:45:30,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-14 03:45:30,515 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:45:30,516 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 03:45:30,516 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 03:45:30,516 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:45:30,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:45:30,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1447863346, now seen corresponding path program 1 times [2024-11-14 03:45:30,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:45:30,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90729328] [2024-11-14 03:45:30,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:45:30,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:45:30,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:45:30,784 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 03:45:30,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:45:30,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90729328] [2024-11-14 03:45:30,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90729328] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:45:30,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:45:30,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 03:45:30,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342503282] [2024-11-14 03:45:30,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:45:30,789 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 03:45:30,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:45:30,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 03:45:30,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:45:30,792 INFO L87 Difference]: Start difference. First operand 333 states and 472 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 03:45:32,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:45:32,050 INFO L93 Difference]: Finished difference Result 735 states and 975 transitions. [2024-11-14 03:45:32,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 03:45:32,052 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 03:45:32,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:45:32,060 INFO L225 Difference]: With dead ends: 735 [2024-11-14 03:45:32,060 INFO L226 Difference]: Without dead ends: 603 [2024-11-14 03:45:32,062 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 03:45:32,063 INFO L432 NwaCegarLoop]: 458 mSDtfsCounter, 968 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:45:32,063 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [972 Valid, 1180 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-14 03:45:32,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2024-11-14 03:45:32,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 519. [2024-11-14 03:45:32,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 394 states have (on average 1.3604060913705585) internal successors, (536), 399 states have internal predecessors, (536), 76 states have call successors, (76), 44 states have call predecessors, (76), 47 states have return successors, (78), 77 states have call predecessors, (78), 74 states have call successors, (78) [2024-11-14 03:45:32,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 690 transitions. [2024-11-14 03:45:32,171 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 690 transitions. Word has length 45 [2024-11-14 03:45:32,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:45:32,171 INFO L471 AbstractCegarLoop]: Abstraction has 519 states and 690 transitions. [2024-11-14 03:45:32,171 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 03:45:32,172 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 690 transitions. [2024-11-14 03:45:32,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-14 03:45:32,176 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:45:32,177 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 03:45:32,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 03:45:32,177 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:45:32,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:45:32,178 INFO L85 PathProgramCache]: Analyzing trace with hash -720214564, now seen corresponding path program 1 times [2024-11-14 03:45:32,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:45:32,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827648715] [2024-11-14 03:45:32,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:45:32,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:45:32,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:45:32,606 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 03:45:32,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:45:32,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827648715] [2024-11-14 03:45:32,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827648715] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:45:32,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:45:32,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-14 03:45:32,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855357403] [2024-11-14 03:45:32,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:45:32,608 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 03:45:32,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:45:32,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 03:45:32,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-14 03:45:32,610 INFO L87 Difference]: Start difference. First operand 519 states and 690 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 03:45:34,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:45:34,047 INFO L93 Difference]: Finished difference Result 1035 states and 1306 transitions. [2024-11-14 03:45:34,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 03:45:34,048 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 03:45:34,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:45:34,056 INFO L225 Difference]: With dead ends: 1035 [2024-11-14 03:45:34,056 INFO L226 Difference]: Without dead ends: 733 [2024-11-14 03:45:34,060 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2024-11-14 03:45:34,061 INFO L432 NwaCegarLoop]: 229 mSDtfsCounter, 569 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 601 SdHoareTripleChecker+Valid, 1066 SdHoareTripleChecker+Invalid, 1148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:45:34,062 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [601 Valid, 1066 Invalid, 1148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1052 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-14 03:45:34,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2024-11-14 03:45:34,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 698. [2024-11-14 03:45:34,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 519 states have (on average 1.325626204238921) internal successors, (688), 525 states have internal predecessors, (688), 103 states have call successors, (103), 67 states have call predecessors, (103), 74 states have return successors, (109), 107 states have call predecessors, (109), 101 states have call successors, (109) [2024-11-14 03:45:34,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 900 transitions. [2024-11-14 03:45:34,187 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 900 transitions. Word has length 46 [2024-11-14 03:45:34,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:45:34,188 INFO L471 AbstractCegarLoop]: Abstraction has 698 states and 900 transitions. [2024-11-14 03:45:34,188 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 03:45:34,188 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 900 transitions. [2024-11-14 03:45:34,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-14 03:45:34,193 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:45:34,193 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 03:45:34,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 03:45:34,193 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:45:34,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:45:34,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1078802049, now seen corresponding path program 1 times [2024-11-14 03:45:34,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:45:34,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941562090] [2024-11-14 03:45:34,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:45:34,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:45:34,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:45:34,285 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 03:45:34,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:45:34,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941562090] [2024-11-14 03:45:34,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941562090] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:45:34,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:45:34,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:45:34,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464559339] [2024-11-14 03:45:34,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:45:34,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:45:34,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:45:34,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:45:34,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:45:34,287 INFO L87 Difference]: Start difference. First operand 698 states and 900 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 03:45:34,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:45:34,585 INFO L93 Difference]: Finished difference Result 1262 states and 1570 transitions. [2024-11-14 03:45:34,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:45:34,586 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 03:45:34,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:45:34,598 INFO L225 Difference]: With dead ends: 1262 [2024-11-14 03:45:34,598 INFO L226 Difference]: Without dead ends: 830 [2024-11-14 03:45:34,600 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 03:45:34,601 INFO L432 NwaCegarLoop]: 351 mSDtfsCounter, 67 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:45:34,601 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 671 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:45:34,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2024-11-14 03:45:34,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 725. [2024-11-14 03:45:34,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 542 states have (on average 1.3154981549815499) internal successors, (713), 548 states have internal predecessors, (713), 105 states have call successors, (105), 69 states have call predecessors, (105), 76 states have return successors, (111), 109 states have call predecessors, (111), 103 states have call successors, (111) [2024-11-14 03:45:34,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 929 transitions. [2024-11-14 03:45:34,729 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 929 transitions. Word has length 47 [2024-11-14 03:45:34,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:45:34,730 INFO L471 AbstractCegarLoop]: Abstraction has 725 states and 929 transitions. [2024-11-14 03:45:34,730 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 03:45:34,730 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 929 transitions. [2024-11-14 03:45:34,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-14 03:45:34,732 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:45:34,732 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 03:45:34,732 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 03:45:34,736 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:45:34,737 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:45:34,737 INFO L85 PathProgramCache]: Analyzing trace with hash -681733294, now seen corresponding path program 1 times [2024-11-14 03:45:34,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:45:34,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489883900] [2024-11-14 03:45:34,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:45:34,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:45:34,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:45:34,858 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 03:45:34,858 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:45:34,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489883900] [2024-11-14 03:45:34,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489883900] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:45:34,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:45:34,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:45:34,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500032953] [2024-11-14 03:45:34,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:45:34,859 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:45:34,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:45:34,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:45:34,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:45:34,860 INFO L87 Difference]: Start difference. First operand 725 states and 929 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 03:45:35,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:45:35,096 INFO L93 Difference]: Finished difference Result 915 states and 1150 transitions. [2024-11-14 03:45:35,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:45:35,097 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 03:45:35,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:45:35,104 INFO L225 Difference]: With dead ends: 915 [2024-11-14 03:45:35,104 INFO L226 Difference]: Without dead ends: 642 [2024-11-14 03:45:35,106 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 03:45:35,108 INFO L432 NwaCegarLoop]: 353 mSDtfsCounter, 378 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:45:35,109 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 414 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:45:35,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2024-11-14 03:45:35,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 533. [2024-11-14 03:45:35,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 402 states have (on average 1.3208955223880596) internal successors, (531), 406 states have internal predecessors, (531), 81 states have call successors, (81), 49 states have call predecessors, (81), 48 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2024-11-14 03:45:35,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 691 transitions. [2024-11-14 03:45:35,188 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 691 transitions. Word has length 53 [2024-11-14 03:45:35,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:45:35,191 INFO L471 AbstractCegarLoop]: Abstraction has 533 states and 691 transitions. [2024-11-14 03:45:35,194 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 03:45:35,194 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 691 transitions. [2024-11-14 03:45:35,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-14 03:45:35,196 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:45:35,196 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 03:45:35,196 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 03:45:35,197 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:45:35,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:45:35,201 INFO L85 PathProgramCache]: Analyzing trace with hash 916196089, now seen corresponding path program 1 times [2024-11-14 03:45:35,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:45:35,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462453879] [2024-11-14 03:45:35,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:45:35,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:45:35,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:45:35,422 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 03:45:35,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:45:35,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462453879] [2024-11-14 03:45:35,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462453879] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:45:35,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:45:35,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 03:45:35,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28769010] [2024-11-14 03:45:35,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:45:35,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:45:35,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:45:35,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:45:35,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:45:35,424 INFO L87 Difference]: Start difference. First operand 533 states and 691 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 03:45:35,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:45:35,935 INFO L93 Difference]: Finished difference Result 636 states and 807 transitions. [2024-11-14 03:45:35,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:45:35,936 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 03:45:35,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:45:35,943 INFO L225 Difference]: With dead ends: 636 [2024-11-14 03:45:35,943 INFO L226 Difference]: Without dead ends: 633 [2024-11-14 03:45:35,944 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 03:45:35,946 INFO L432 NwaCegarLoop]: 345 mSDtfsCounter, 689 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:45:35,947 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [689 Valid, 385 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 03:45:35,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2024-11-14 03:45:36,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 532. [2024-11-14 03:45:36,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 402 states have (on average 1.3134328358208955) internal successors, (528), 405 states have internal predecessors, (528), 80 states have call successors, (80), 49 states have call predecessors, (80), 48 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2024-11-14 03:45:36,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 687 transitions. [2024-11-14 03:45:36,024 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 687 transitions. Word has length 54 [2024-11-14 03:45:36,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:45:36,025 INFO L471 AbstractCegarLoop]: Abstraction has 532 states and 687 transitions. [2024-11-14 03:45:36,025 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 03:45:36,025 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 687 transitions. [2024-11-14 03:45:36,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-14 03:45:36,027 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:45:36,027 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 03:45:36,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-14 03:45:36,027 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:45:36,027 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:45:36,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1664197561, now seen corresponding path program 1 times [2024-11-14 03:45:36,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:45:36,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604554520] [2024-11-14 03:45:36,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:45:36,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:45:36,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:45:36,313 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 03:45:36,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:45:36,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604554520] [2024-11-14 03:45:36,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604554520] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:45:36,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855460152] [2024-11-14 03:45:36,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:45:36,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:45:36,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:45:36,319 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:45:36,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 03:45:36,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:45:36,541 INFO L255 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 03:45:36,550 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:45:36,918 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 03:45:36,918 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:45:37,043 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 03:45:37,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855460152] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:45:37,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1728179189] [2024-11-14 03:45:37,070 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2024-11-14 03:45:37,070 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:45:37,074 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:45:37,080 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:45:37,080 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:45:47,047 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 221 for LOIs [2024-11-14 03:45:47,155 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 217 for LOIs [2024-11-14 03:45:47,262 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 225 for LOIs [2024-11-14 03:45:49,109 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 221 for LOIs [2024-11-14 03:45:49,433 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 221 for LOIs [2024-11-14 03:45:49,976 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 221 for LOIs [2024-11-14 03:45:50,090 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 228 for LOIs [2024-11-14 03:45:50,203 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:46:24,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1728179189] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:46:24,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:46:24,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [5, 5, 4] total 36 [2024-11-14 03:46:24,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650274888] [2024-11-14 03:46:24,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:46:24,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-14 03:46:24,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:46:24,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-14 03:46:24,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2024-11-14 03:46:24,556 INFO L87 Difference]: Start difference. First operand 532 states and 687 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 03:46:50,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:46:50,428 INFO L93 Difference]: Finished difference Result 874 states and 1080 transitions. [2024-11-14 03:46:50,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-14 03:46:50,430 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 03:46:50,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:46:50,439 INFO L225 Difference]: With dead ends: 874 [2024-11-14 03:46:50,439 INFO L226 Difference]: Without dead ends: 559 [2024-11-14 03:46:50,441 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 131 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 48.4s TimeCoverageRelationStatistics Valid=405, Invalid=1947, Unknown=0, NotChecked=0, Total=2352 [2024-11-14 03:46:50,443 INFO L432 NwaCegarLoop]: 326 mSDtfsCounter, 128 mSDsluCounter, 2066 mSDsCounter, 0 mSdLazyCounter, 4819 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 2392 SdHoareTripleChecker+Invalid, 4921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 4819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:46:50,444 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 2392 Invalid, 4921 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [102 Valid, 4819 Invalid, 0 Unknown, 0 Unchecked, 11.5s Time] [2024-11-14 03:46:50,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2024-11-14 03:46:50,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 551. [2024-11-14 03:46:50,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 419 states have (on average 1.307875894988067) internal successors, (548), 422 states have internal predecessors, (548), 81 states have call successors, (81), 50 states have call predecessors, (81), 49 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2024-11-14 03:46:50,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 709 transitions. [2024-11-14 03:46:50,571 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 709 transitions. Word has length 55 [2024-11-14 03:46:50,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:46:50,571 INFO L471 AbstractCegarLoop]: Abstraction has 551 states and 709 transitions. [2024-11-14 03:46:50,572 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 03:46:50,572 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 709 transitions. [2024-11-14 03:46:50,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-14 03:46:50,573 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:46:50,573 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 03:46:50,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 03:46:50,774 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:46:50,774 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:46:50,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:46:50,775 INFO L85 PathProgramCache]: Analyzing trace with hash -902780188, now seen corresponding path program 1 times [2024-11-14 03:46:50,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:46:50,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766472073] [2024-11-14 03:46:50,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:46:50,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:46:50,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:46:50,872 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 03:46:50,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:46:50,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766472073] [2024-11-14 03:46:50,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766472073] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:46:50,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:46:50,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:46:50,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773572377] [2024-11-14 03:46:50,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:46:50,875 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:46:50,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:46:50,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:46:50,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:46:50,876 INFO L87 Difference]: Start difference. First operand 551 states and 709 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 03:46:51,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:46:51,109 INFO L93 Difference]: Finished difference Result 832 states and 1031 transitions. [2024-11-14 03:46:51,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:46:51,110 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 03:46:51,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:46:51,115 INFO L225 Difference]: With dead ends: 832 [2024-11-14 03:46:51,115 INFO L226 Difference]: Without dead ends: 663 [2024-11-14 03:46:51,116 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 03:46:51,116 INFO L432 NwaCegarLoop]: 372 mSDtfsCounter, 42 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:46:51,116 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 708 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:46:51,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2024-11-14 03:46:51,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 586. [2024-11-14 03:46:51,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 448 states have (on average 1.3035714285714286) internal successors, (584), 451 states have internal predecessors, (584), 84 states have call successors, (84), 53 states have call predecessors, (84), 52 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2024-11-14 03:46:51,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 751 transitions. [2024-11-14 03:46:51,248 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 751 transitions. Word has length 61 [2024-11-14 03:46:51,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:46:51,250 INFO L471 AbstractCegarLoop]: Abstraction has 586 states and 751 transitions. [2024-11-14 03:46:51,250 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 03:46:51,251 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 751 transitions. [2024-11-14 03:46:51,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-14 03:46:51,252 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:46:51,252 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:46:51,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-14 03:46:51,252 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:46:51,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:46:51,252 INFO L85 PathProgramCache]: Analyzing trace with hash -533596658, now seen corresponding path program 1 times [2024-11-14 03:46:51,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:46:51,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149132810] [2024-11-14 03:46:51,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:46:51,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:46:51,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:46:51,431 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 03:46:51,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:46:51,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149132810] [2024-11-14 03:46:51,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149132810] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:46:51,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:46:51,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 03:46:51,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90544] [2024-11-14 03:46:51,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:46:51,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:46:51,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:46:51,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:46:51,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:46:51,433 INFO L87 Difference]: Start difference. First operand 586 states and 751 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 03:46:52,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:46:52,712 INFO L93 Difference]: Finished difference Result 1589 states and 2377 transitions. [2024-11-14 03:46:52,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 03:46:52,713 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 70 [2024-11-14 03:46:52,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:46:52,721 INFO L225 Difference]: With dead ends: 1589 [2024-11-14 03:46:52,721 INFO L226 Difference]: Without dead ends: 1383 [2024-11-14 03:46:52,724 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 03:46:52,725 INFO L432 NwaCegarLoop]: 577 mSDtfsCounter, 1615 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1617 SdHoareTripleChecker+Valid, 1511 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:46:52,725 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1617 Valid, 1511 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 03:46:52,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2024-11-14 03:46:52,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 1372. [2024-11-14 03:46:52,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1121 states have (on average 1.4148082069580732) internal successors, (1586), 1127 states have internal predecessors, (1586), 173 states have call successors, (173), 77 states have call predecessors, (173), 76 states have return successors, (238), 169 states have call predecessors, (238), 172 states have call successors, (238) [2024-11-14 03:46:52,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 1997 transitions. [2024-11-14 03:46:52,895 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 1997 transitions. Word has length 70 [2024-11-14 03:46:52,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:46:52,896 INFO L471 AbstractCegarLoop]: Abstraction has 1372 states and 1997 transitions. [2024-11-14 03:46:52,896 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 03:46:52,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 1997 transitions. [2024-11-14 03:46:52,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-14 03:46:52,904 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:46:52,904 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 03:46:52,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-14 03:46:52,904 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:46:52,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:46:52,904 INFO L85 PathProgramCache]: Analyzing trace with hash 420369213, now seen corresponding path program 1 times [2024-11-14 03:46:52,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:46:52,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050422522] [2024-11-14 03:46:52,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:46:52,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:46:52,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:46:53,377 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 03:46:53,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:46:53,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050422522] [2024-11-14 03:46:53,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050422522] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:46:53,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171883394] [2024-11-14 03:46:53,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:46:53,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:46:53,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:46:53,380 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:46:53,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 03:46:53,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:46:53,558 INFO L255 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 03:46:53,564 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:46:53,642 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 03:46:53,644 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:46:53,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171883394] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:46:53,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:46:53,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2024-11-14 03:46:53,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113718353] [2024-11-14 03:46:53,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:46:53,645 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 03:46:53,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:46:53,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 03:46:53,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2024-11-14 03:46:53,646 INFO L87 Difference]: Start difference. First operand 1372 states and 1997 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 03:46:54,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:46:54,223 INFO L93 Difference]: Finished difference Result 1632 states and 2297 transitions. [2024-11-14 03:46:54,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 03:46:54,223 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 03:46:54,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:46:54,233 INFO L225 Difference]: With dead ends: 1632 [2024-11-14 03:46:54,233 INFO L226 Difference]: Without dead ends: 1263 [2024-11-14 03:46:54,235 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 03:46:54,236 INFO L432 NwaCegarLoop]: 353 mSDtfsCounter, 335 mSDsluCounter, 1055 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 1408 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:46:54,239 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 1408 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 03:46:54,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2024-11-14 03:46:54,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 1259. [2024-11-14 03:46:54,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1259 states, 1046 states have (on average 1.4321223709369024) internal successors, (1498), 1052 states have internal predecessors, (1498), 152 states have call successors, (152), 60 states have call predecessors, (152), 59 states have return successors, (217), 148 states have call predecessors, (217), 151 states have call successors, (217) [2024-11-14 03:46:54,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1259 states to 1259 states and 1867 transitions. [2024-11-14 03:46:54,433 INFO L78 Accepts]: Start accepts. Automaton has 1259 states and 1867 transitions. Word has length 102 [2024-11-14 03:46:54,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:46:54,434 INFO L471 AbstractCegarLoop]: Abstraction has 1259 states and 1867 transitions. [2024-11-14 03:46:54,434 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 03:46:54,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1259 states and 1867 transitions. [2024-11-14 03:46:54,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-14 03:46:54,438 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:46:54,438 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 03:46:54,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 03:46:54,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:46:54,639 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:46:54,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:46:54,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1273927351, now seen corresponding path program 1 times [2024-11-14 03:46:54,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:46:54,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621871012] [2024-11-14 03:46:54,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:46:54,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:46:54,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:46:54,921 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 03:46:54,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:46:54,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621871012] [2024-11-14 03:46:54,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621871012] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:46:54,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068282935] [2024-11-14 03:46:54,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:46:54,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:46:54,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:46:54,924 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:46:54,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 03:46:55,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:46:55,087 INFO L255 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 03:46:55,091 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:46:55,470 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 03:46:55,470 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:46:55,668 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 03:46:55,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068282935] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:46:55,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1751093354] [2024-11-14 03:46:55,671 INFO L159 IcfgInterpreter]: Started Sifa with 65 locations of interest [2024-11-14 03:46:55,671 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:46:55,672 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:46:55,672 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:46:55,672 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:47:24,074 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 259 for LOIs [2024-11-14 03:47:24,638 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 230 for LOIs [2024-11-14 03:47:25,221 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 180 for LOIs [2024-11-14 03:47:25,278 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 244 for LOIs [2024-11-14 03:47:29,459 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 245 for LOIs [2024-11-14 03:47:33,283 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 194 for LOIs [2024-11-14 03:47:33,624 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 238 for LOIs [2024-11-14 03:47:34,172 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 249 for LOIs [2024-11-14 03:47:34,786 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:48:53,063 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25425#(and (= ~q_req_up~0 1) (= ~q_free~0 1) (exists ((v_~c_last_read~0_10 Int) (v_~q_free~0_44 Int)) (and (= ~E_12~0 2) (<= 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) (= ~T11_E~0 2) (= ~t10_i~0 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (<= ~q_buf_0~0 2147483647) (= 0 ~t8_pc~0) (<= ~p_dw_pc~0 1) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_13~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~t13_st~0 0) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (= ~E_5~0 2) (<= 0 ~p_num_write~0) (= ~E_10~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~E_11~0 2) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (<= 0 (+ ~p_last_write~0 2147483648)) (= ~t10_st~0 0) (= ~t10_pc~0 0) (= 0 ~t9_pc~0) (= ~t11_pc~0 0) (= ~T12_E~0 2) (= ~t11_i~0 0) (= ~T13_E~0 2) (= ~t12_pc~0 0) (= ~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) (= ~t12_i~0 0) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~t13_i~0 0) (= ~token~0 0) (= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= ~t12_st~0 0) (= 0 ~t4_pc~0) (= ~t13_pc~0 0) (= ~t11_st~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (= ~E_9~0 2) (<= 0 v_~q_free~0_44) (not (= v_~q_free~0_44 1)) (= ~t1_i~0 0))) (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) (= ~c_dr_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (= ~c_dr_st~0 1))' at error location [2024-11-14 03:48:53,063 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:48:53,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:48:53,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 13 [2024-11-14 03:48:53,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793215250] [2024-11-14 03:48:53,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:48:53,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-14 03:48:53,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:48:53,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-14 03:48:53,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=2973, Unknown=0, NotChecked=0, Total=3306 [2024-11-14 03:48:53,065 INFO L87 Difference]: Start difference. First operand 1259 states and 1867 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 03:48:57,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:48:57,296 INFO L93 Difference]: Finished difference Result 2199 states and 2954 transitions. [2024-11-14 03:48:57,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-14 03:48:57,297 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 03:48:57,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:48:57,307 INFO L225 Difference]: With dead ends: 2199 [2024-11-14 03:48:57,308 INFO L226 Difference]: Without dead ends: 2017 [2024-11-14 03:48:57,312 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 272 SyntacticMatches, 8 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 4816 ImplicationChecksByTransitivity, 80.5s TimeCoverageRelationStatistics Valid=1088, Invalid=12252, Unknown=0, NotChecked=0, Total=13340 [2024-11-14 03:48:57,313 INFO L432 NwaCegarLoop]: 307 mSDtfsCounter, 1288 mSDsluCounter, 1874 mSDsCounter, 0 mSdLazyCounter, 2488 mSolverCounterSat, 412 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1293 SdHoareTripleChecker+Valid, 2181 SdHoareTripleChecker+Invalid, 2900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 412 IncrementalHoareTripleChecker+Valid, 2488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:48:57,313 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1293 Valid, 2181 Invalid, 2900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [412 Valid, 2488 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-14 03:48:57,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2024-11-14 03:48:57,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 1654. [2024-11-14 03:48:57,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1331 states have (on average 1.3771600300525921) internal successors, (1833), 1337 states have internal predecessors, (1833), 210 states have call successors, (210), 112 states have call predecessors, (210), 111 states have return successors, (275), 206 states have call predecessors, (275), 209 states have call successors, (275) [2024-11-14 03:48:57,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 2318 transitions. [2024-11-14 03:48:57,571 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 2318 transitions. Word has length 104 [2024-11-14 03:48:57,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:48:57,572 INFO L471 AbstractCegarLoop]: Abstraction has 1654 states and 2318 transitions. [2024-11-14 03:48:57,572 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 03:48:57,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 2318 transitions. [2024-11-14 03:48:57,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-14 03:48:57,575 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:48:57,575 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 03:48:57,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-14 03:48:57,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-14 03:48:57,776 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:48:57,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:48:57,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1701349487, now seen corresponding path program 1 times [2024-11-14 03:48:57,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:48:57,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782862244] [2024-11-14 03:48:57,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:48:57,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:48:57,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:48:57,838 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 03:48:57,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:48:57,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782862244] [2024-11-14 03:48:57,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782862244] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:48:57,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:48:57,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:48:57,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201451252] [2024-11-14 03:48:57,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:48:57,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:48:57,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:48:57,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:48:57,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:48:57,839 INFO L87 Difference]: Start difference. First operand 1654 states and 2318 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 03:48:58,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:48:58,184 INFO L93 Difference]: Finished difference Result 2153 states and 2890 transitions. [2024-11-14 03:48:58,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:48:58,185 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 03:48:58,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:48:58,194 INFO L225 Difference]: With dead ends: 2153 [2024-11-14 03:48:58,194 INFO L226 Difference]: Without dead ends: 1644 [2024-11-14 03:48:58,196 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 03:48:58,197 INFO L432 NwaCegarLoop]: 377 mSDtfsCounter, 381 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:48:58,197 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 443 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:48:58,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2024-11-14 03:48:58,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1635. [2024-11-14 03:48:58,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1635 states, 1314 states have (on average 1.3706240487062404) internal successors, (1801), 1320 states have internal predecessors, (1801), 209 states have call successors, (209), 111 states have call predecessors, (209), 110 states have return successors, (274), 205 states have call predecessors, (274), 208 states have call successors, (274) [2024-11-14 03:48:58,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 2284 transitions. [2024-11-14 03:48:58,439 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 2284 transitions. Word has length 108 [2024-11-14 03:48:58,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:48:58,439 INFO L471 AbstractCegarLoop]: Abstraction has 1635 states and 2284 transitions. [2024-11-14 03:48:58,439 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 03:48:58,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 2284 transitions. [2024-11-14 03:48:58,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-14 03:48:58,445 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:48:58,446 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 03:48:58,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-14 03:48:58,446 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:48:58,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:48:58,446 INFO L85 PathProgramCache]: Analyzing trace with hash -144679479, now seen corresponding path program 1 times [2024-11-14 03:48:58,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:48:58,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952399183] [2024-11-14 03:48:58,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:48:58,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:48:58,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:48:58,635 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 03:48:58,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:48:58,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952399183] [2024-11-14 03:48:58,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952399183] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:48:58,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580808130] [2024-11-14 03:48:58,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:48:58,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:48:58,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:48:58,639 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:48:58,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 03:48:58,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:48:58,800 INFO L255 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 03:48:58,803 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:48:58,897 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 03:48:58,897 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:48:58,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580808130] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:48:58,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:48:58,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2024-11-14 03:48:58,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941863040] [2024-11-14 03:48:58,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:48:58,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 03:48:58,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:48:58,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 03:48:58,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-11-14 03:48:58,899 INFO L87 Difference]: Start difference. First operand 1635 states and 2284 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 03:48:59,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:48:59,479 INFO L93 Difference]: Finished difference Result 2155 states and 2878 transitions. [2024-11-14 03:48:59,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 03:48:59,480 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 03:48:59,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:48:59,490 INFO L225 Difference]: With dead ends: 2155 [2024-11-14 03:48:59,490 INFO L226 Difference]: Without dead ends: 1606 [2024-11-14 03:48:59,492 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 03:48:59,493 INFO L432 NwaCegarLoop]: 366 mSDtfsCounter, 47 mSDsluCounter, 1426 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1792 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:48:59,493 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 1792 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:48:59,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2024-11-14 03:48:59,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1546. [2024-11-14 03:48:59,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1546 states, 1253 states have (on average 1.3814844373503592) internal successors, (1731), 1259 states have internal predecessors, (1731), 194 states have call successors, (194), 98 states have call predecessors, (194), 97 states have return successors, (259), 190 states have call predecessors, (259), 193 states have call successors, (259) [2024-11-14 03:48:59,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 2184 transitions. [2024-11-14 03:48:59,774 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 2184 transitions. Word has length 112 [2024-11-14 03:48:59,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:48:59,775 INFO L471 AbstractCegarLoop]: Abstraction has 1546 states and 2184 transitions. [2024-11-14 03:48:59,775 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 03:48:59,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 2184 transitions. [2024-11-14 03:48:59,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-14 03:48:59,778 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:48:59,778 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 03:48:59,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 03:48:59,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-14 03:48:59,979 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:48:59,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:48:59,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1335699521, now seen corresponding path program 1 times [2024-11-14 03:48:59,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:48:59,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820154460] [2024-11-14 03:48:59,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:48:59,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:49:00,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:49:00,147 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 03:49:00,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:49:00,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820154460] [2024-11-14 03:49:00,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820154460] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:49:00,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:49:00,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 03:49:00,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875937602] [2024-11-14 03:49:00,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:49:00,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 03:49:00,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:49:00,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 03:49:00,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:49:00,149 INFO L87 Difference]: Start difference. First operand 1546 states and 2184 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 03:49:00,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:49:00,656 INFO L93 Difference]: Finished difference Result 2295 states and 3029 transitions. [2024-11-14 03:49:00,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 03:49:00,657 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 03:49:00,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:49:00,667 INFO L225 Difference]: With dead ends: 2295 [2024-11-14 03:49:00,667 INFO L226 Difference]: Without dead ends: 1838 [2024-11-14 03:49:00,669 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 03:49:00,670 INFO L432 NwaCegarLoop]: 371 mSDtfsCounter, 370 mSDsluCounter, 1173 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 1544 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:49:00,670 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 1544 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:49:00,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1838 states. [2024-11-14 03:49:00,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1838 to 1804. [2024-11-14 03:49:00,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1415 states have (on average 1.350530035335689) internal successors, (1911), 1427 states have internal predecessors, (1911), 242 states have call successors, (242), 140 states have call predecessors, (242), 145 states have return successors, (319), 238 states have call predecessors, (319), 241 states have call successors, (319) [2024-11-14 03:49:00,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 2472 transitions. [2024-11-14 03:49:00,942 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 2472 transitions. Word has length 113 [2024-11-14 03:49:00,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:49:00,943 INFO L471 AbstractCegarLoop]: Abstraction has 1804 states and 2472 transitions. [2024-11-14 03:49:00,943 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 03:49:00,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 2472 transitions. [2024-11-14 03:49:00,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-11-14 03:49:00,946 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:49:00,946 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 03:49:00,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-14 03:49:00,946 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:49:00,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:49:00,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1434040710, now seen corresponding path program 1 times [2024-11-14 03:49:00,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:49:00,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873978862] [2024-11-14 03:49:00,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:49:00,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:49:00,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:49:02,126 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-14 03:49:02,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:49:02,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873978862] [2024-11-14 03:49:02,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873978862] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:49:02,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870217733] [2024-11-14 03:49:02,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:49:02,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:49:02,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:49:02,129 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:49:02,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 03:49:02,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:49:02,288 INFO L255 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-14 03:49:02,296 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:49:03,202 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:49:03,203 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:49:04,704 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-14 03:49:04,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870217733] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:49:04,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [731796397] [2024-11-14 03:49:04,707 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2024-11-14 03:49:04,707 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:49:04,707 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:49:04,708 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:49:04,708 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:49:51,668 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 270 for LOIs [2024-11-14 03:49:51,966 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 13 for LOIs [2024-11-14 03:49:51,967 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2024-11-14 03:49:51,970 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 234 for LOIs [2024-11-14 03:49:53,840 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 235 for LOIs [2024-11-14 03:49:55,346 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 21 for LOIs [2024-11-14 03:49:55,369 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 228 for LOIs [2024-11-14 03:49:55,639 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 239 for LOIs [2024-11-14 03:49:55,915 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:50:16,433 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '47660#(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 03:50:16,433 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:50:16,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:50:16,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 15, 16] total 53 [2024-11-14 03:50:16,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261432407] [2024-11-14 03:50:16,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:50:16,435 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-14 03:50:16,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:50:16,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-14 03:50:16,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=851, Invalid=9451, Unknown=0, NotChecked=0, Total=10302 [2024-11-14 03:50:16,439 INFO L87 Difference]: Start difference. First operand 1804 states and 2472 transitions. Second operand has 53 states, 36 states have (on average 5.444444444444445) internal successors, (196), 39 states have internal predecessors, (196), 22 states have call successors, (44), 18 states have call predecessors, (44), 23 states have return successors, (46), 21 states have call predecessors, (46), 22 states have call successors, (46) [2024-11-14 03:50:35,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:50:35,957 INFO L93 Difference]: Finished difference Result 4628 states and 5919 transitions. [2024-11-14 03:50:35,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 273 states. [2024-11-14 03:50:35,958 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 36 states have (on average 5.444444444444445) internal successors, (196), 39 states have internal predecessors, (196), 22 states have call successors, (44), 18 states have call predecessors, (44), 23 states have return successors, (46), 21 states have call predecessors, (46), 22 states have call successors, (46) Word has length 114 [2024-11-14 03:50:35,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:50:35,974 INFO L225 Difference]: With dead ends: 4628 [2024-11-14 03:50:35,974 INFO L226 Difference]: Without dead ends: 3913 [2024-11-14 03:50:35,999 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 672 GetRequests, 298 SyntacticMatches, 6 SemanticMatches, 368 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 55706 ImplicationChecksByTransitivity, 35.3s TimeCoverageRelationStatistics Valid=13027, Invalid=123503, Unknown=0, NotChecked=0, Total=136530 [2024-11-14 03:50:36,000 INFO L432 NwaCegarLoop]: 312 mSDtfsCounter, 6263 mSDsluCounter, 4183 mSDsCounter, 0 mSdLazyCounter, 5921 mSolverCounterSat, 2503 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6265 SdHoareTripleChecker+Valid, 4495 SdHoareTripleChecker+Invalid, 8424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2503 IncrementalHoareTripleChecker+Valid, 5921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:50:36,000 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6265 Valid, 4495 Invalid, 8424 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2503 Valid, 5921 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2024-11-14 03:50:36,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3913 states. [2024-11-14 03:50:36,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3913 to 2080. [2024-11-14 03:50:36,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 1599 states have (on average 1.3270794246404003) internal successors, (2122), 1613 states have internal predecessors, (2122), 287 states have call successors, (287), 177 states have call predecessors, (287), 192 states have return successors, (376), 291 states have call predecessors, (376), 286 states have call successors, (376) [2024-11-14 03:50:36,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 2785 transitions. [2024-11-14 03:50:36,525 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 2785 transitions. Word has length 114 [2024-11-14 03:50:36,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:50:36,526 INFO L471 AbstractCegarLoop]: Abstraction has 2080 states and 2785 transitions. [2024-11-14 03:50:36,526 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 36 states have (on average 5.444444444444445) internal successors, (196), 39 states have internal predecessors, (196), 22 states have call successors, (44), 18 states have call predecessors, (44), 23 states have return successors, (46), 21 states have call predecessors, (46), 22 states have call successors, (46) [2024-11-14 03:50:36,526 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 2785 transitions. [2024-11-14 03:50:36,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-11-14 03:50:36,529 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:50:36,529 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 03:50:36,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 03:50:36,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-14 03:50:36,733 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:50:36,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:50:36,734 INFO L85 PathProgramCache]: Analyzing trace with hash 658091466, now seen corresponding path program 1 times [2024-11-14 03:50:36,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:50:36,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902239812] [2024-11-14 03:50:36,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:50:36,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:50:36,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:50:37,084 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 03:50:37,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:50:37,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902239812] [2024-11-14 03:50:37,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902239812] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:50:37,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878440578] [2024-11-14 03:50:37,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:50:37,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:50:37,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:50:37,087 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:50:37,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 03:50:37,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:50:37,245 INFO L255 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-14 03:50:37,249 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:50:37,336 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 03:50:37,336 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:50:37,559 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 03:50:37,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878440578] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 03:50:37,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:50:37,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2024-11-14 03:50:37,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141404066] [2024-11-14 03:50:37,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:50:37,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 03:50:37,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:50:37,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 03:50:37,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2024-11-14 03:50:37,562 INFO L87 Difference]: Start difference. First operand 2080 states and 2785 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 03:50:38,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:50:38,764 INFO L93 Difference]: Finished difference Result 3404 states and 4333 transitions. [2024-11-14 03:50:38,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 03:50:38,765 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 03:50:38,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:50:38,776 INFO L225 Difference]: With dead ends: 3404 [2024-11-14 03:50:38,776 INFO L226 Difference]: Without dead ends: 2413 [2024-11-14 03:50:38,779 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2024-11-14 03:50:38,780 INFO L432 NwaCegarLoop]: 281 mSDtfsCounter, 549 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:50:38,780 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [552 Valid, 807 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1047 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:50:38,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2413 states. [2024-11-14 03:50:39,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2413 to 2160. [2024-11-14 03:50:39,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2160 states, 1644 states have (on average 1.3217761557177616) internal successors, (2173), 1661 states have internal predecessors, (2173), 306 states have call successors, (306), 186 states have call predecessors, (306), 208 states have return successors, (416), 314 states have call predecessors, (416), 305 states have call successors, (416) [2024-11-14 03:50:39,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2160 states to 2160 states and 2895 transitions. [2024-11-14 03:50:39,274 INFO L78 Accepts]: Start accepts. Automaton has 2160 states and 2895 transitions. Word has length 115 [2024-11-14 03:50:39,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:50:39,274 INFO L471 AbstractCegarLoop]: Abstraction has 2160 states and 2895 transitions. [2024-11-14 03:50:39,275 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 03:50:39,275 INFO L276 IsEmpty]: Start isEmpty. Operand 2160 states and 2895 transitions. [2024-11-14 03:50:39,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-14 03:50:39,278 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:50:39,278 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 03:50:39,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 03:50:39,482 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-14 03:50:39,482 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:50:39,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:50:39,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1143928204, now seen corresponding path program 1 times [2024-11-14 03:50:39,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:50:39,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109195123] [2024-11-14 03:50:39,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:50:39,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:50:39,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:50:40,259 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-14 03:50:40,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:50:40,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109195123] [2024-11-14 03:50:40,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109195123] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:50:40,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774242729] [2024-11-14 03:50:40,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:50:40,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:50:40,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:50:40,262 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:50:40,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 03:50:40,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:50:40,427 INFO L255 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-14 03:50:40,431 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:50:41,371 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 03:50:41,371 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:50:42,793 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-14 03:50:42,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774242729] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:50:42,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1727634528] [2024-11-14 03:50:42,796 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2024-11-14 03:50:42,796 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:50:42,796 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:50:42,796 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:50:42,796 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:51:06,865 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 271 for LOIs [2024-11-14 03:51:07,174 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 77 for LOIs [2024-11-14 03:51:07,198 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2024-11-14 03:51:07,201 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 235 for LOIs [2024-11-14 03:51:08,815 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 236 for LOIs [2024-11-14 03:51:10,415 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 21 for LOIs [2024-11-14 03:51:10,439 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 229 for LOIs [2024-11-14 03:51:10,699 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 240 for LOIs [2024-11-14 03:51:10,981 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:51:32,334 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '67178#(and (= ~q_req_up~0 1) (= ~q_free~0 1) (exists ((v_~q_free~0_102 Int) (v_~q_req_up~0_98 Int)) (and (or (exists ((v_~p_dw_st~0_140 Int) (v_~p_dw_pc~0_48 Int)) (and (or (and (= v_~p_dw_st~0_140 1) (= v_~p_dw_pc~0_48 0)) (and (<= ~q_buf_0~0 2147483647) (= v_~p_dw_st~0_140 1) (<= 0 (+ ~q_buf_0~0 2147483648)) (= v_~q_req_up~0_98 1))) (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_48 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_48 0))))) (= ~p_dw_st~0 0)) (or (and (= v_~q_free~0_102 0) (= ~p_dw_pc~0 1) (= 2 ~p_dw_st~0)) (and (<= v_~q_free~0_102 1) (<= 0 ~p_dw_pc~0) (= ~p_dw_st~0 0))))) (= ~c_dr_pc~0 1) (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 03:51:32,335 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:51:32,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:51:32,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 18] total 49 [2024-11-14 03:51:32,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457151222] [2024-11-14 03:51:32,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:51:32,335 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-14 03:51:32,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:51:32,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-14 03:51:32,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=923, Invalid=9379, Unknown=0, NotChecked=0, Total=10302 [2024-11-14 03:51:32,338 INFO L87 Difference]: Start difference. First operand 2160 states and 2895 transitions. Second operand has 49 states, 35 states have (on average 6.085714285714285) internal successors, (213), 39 states have internal predecessors, (213), 26 states have call successors, (49), 17 states have call predecessors, (49), 21 states have return successors, (51), 24 states have call predecessors, (51), 26 states have call successors, (51) [2024-11-14 03:51:41,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:51:41,416 INFO L93 Difference]: Finished difference Result 4365 states and 5474 transitions. [2024-11-14 03:51:41,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2024-11-14 03:51:41,416 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 35 states have (on average 6.085714285714285) internal successors, (213), 39 states have internal predecessors, (213), 26 states have call successors, (49), 17 states have call predecessors, (49), 21 states have return successors, (51), 24 states have call predecessors, (51), 26 states have call successors, (51) Word has length 124 [2024-11-14 03:51:41,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:51:41,435 INFO L225 Difference]: With dead ends: 4365 [2024-11-14 03:51:41,435 INFO L226 Difference]: Without dead ends: 3294 [2024-11-14 03:51:41,443 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 323 SyntacticMatches, 2 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 15911 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=4266, Invalid=36740, Unknown=0, NotChecked=0, Total=41006 [2024-11-14 03:51:41,444 INFO L432 NwaCegarLoop]: 281 mSDtfsCounter, 6950 mSDsluCounter, 3359 mSDsCounter, 0 mSdLazyCounter, 5977 mSolverCounterSat, 3215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6950 SdHoareTripleChecker+Valid, 3640 SdHoareTripleChecker+Invalid, 9192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3215 IncrementalHoareTripleChecker+Valid, 5977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:51:41,444 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6950 Valid, 3640 Invalid, 9192 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3215 Valid, 5977 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2024-11-14 03:51:41,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3294 states. [2024-11-14 03:51:41,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3294 to 1976. [2024-11-14 03:51:41,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1976 states, 1532 states have (on average 1.3348563968668408) internal successors, (2045), 1548 states have internal predecessors, (2045), 266 states have call successors, (266), 154 states have call predecessors, (266), 176 states have return successors, (366), 275 states have call predecessors, (366), 265 states have call successors, (366) [2024-11-14 03:51:41,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1976 states to 1976 states and 2677 transitions. [2024-11-14 03:51:41,923 INFO L78 Accepts]: Start accepts. Automaton has 1976 states and 2677 transitions. Word has length 124 [2024-11-14 03:51:41,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:51:41,923 INFO L471 AbstractCegarLoop]: Abstraction has 1976 states and 2677 transitions. [2024-11-14 03:51:41,924 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 35 states have (on average 6.085714285714285) internal successors, (213), 39 states have internal predecessors, (213), 26 states have call successors, (49), 17 states have call predecessors, (49), 21 states have return successors, (51), 24 states have call predecessors, (51), 26 states have call successors, (51) [2024-11-14 03:51:41,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1976 states and 2677 transitions. [2024-11-14 03:51:41,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-14 03:51:41,927 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:51:41,927 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 03:51:41,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 03:51:42,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:51:42,128 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:51:42,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:51:42,128 INFO L85 PathProgramCache]: Analyzing trace with hash -26552486, now seen corresponding path program 1 times [2024-11-14 03:51:42,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:51:42,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10015944] [2024-11-14 03:51:42,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:51:42,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:51:42,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:51:42,327 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 03:51:42,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:51:42,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10015944] [2024-11-14 03:51:42,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10015944] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:51:42,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424341835] [2024-11-14 03:51:42,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:51:42,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:51:42,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:51:42,330 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:51:42,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 03:51:42,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:51:42,498 INFO L255 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-14 03:51:42,501 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:51:42,623 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 03:51:42,624 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:51:42,833 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 03:51:42,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424341835] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 03:51:42,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:51:42,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2024-11-14 03:51:42,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468760974] [2024-11-14 03:51:42,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:51:42,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 03:51:42,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:51:42,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 03:51:42,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-14 03:51:42,835 INFO L87 Difference]: Start difference. First operand 1976 states and 2677 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 03:51:44,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:51:44,103 INFO L93 Difference]: Finished difference Result 2631 states and 3418 transitions. [2024-11-14 03:51:44,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 03:51:44,104 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 03:51:44,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:51:44,111 INFO L225 Difference]: With dead ends: 2631 [2024-11-14 03:51:44,111 INFO L226 Difference]: Without dead ends: 1744 [2024-11-14 03:51:44,113 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 03:51:44,114 INFO L432 NwaCegarLoop]: 270 mSDtfsCounter, 876 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 877 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 1260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 03:51:44,114 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [877 Valid, 773 Invalid, 1260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1080 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 03:51:44,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1744 states. [2024-11-14 03:51:44,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1744 to 1707. [2024-11-14 03:51:44,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1707 states, 1333 states have (on average 1.350337584396099) internal successors, (1800), 1349 states have internal predecessors, (1800), 230 states have call successors, (230), 124 states have call predecessors, (230), 142 states have return successors, (325), 235 states have call predecessors, (325), 229 states have call successors, (325) [2024-11-14 03:51:44,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1707 states to 1707 states and 2355 transitions. [2024-11-14 03:51:44,511 INFO L78 Accepts]: Start accepts. Automaton has 1707 states and 2355 transitions. Word has length 125 [2024-11-14 03:51:44,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:51:44,511 INFO L471 AbstractCegarLoop]: Abstraction has 1707 states and 2355 transitions. [2024-11-14 03:51:44,511 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 03:51:44,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1707 states and 2355 transitions. [2024-11-14 03:51:44,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2024-11-14 03:51:44,515 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:51:44,516 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 03:51:44,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-14 03:51:44,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-14 03:51:44,720 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:51:44,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:51:44,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1013255235, now seen corresponding path program 1 times [2024-11-14 03:51:44,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:51:44,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64923647] [2024-11-14 03:51:44,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:51:44,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:51:44,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:51:44,861 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:51:44,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:51:44,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64923647] [2024-11-14 03:51:44,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64923647] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:51:44,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334528833] [2024-11-14 03:51:44,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:51:44,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:51:44,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:51:44,863 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:51:44,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 03:51:45,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:51:45,118 INFO L255 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:51:45,121 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:51:45,151 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-14 03:51:45,151 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:51:45,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334528833] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:51:45,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:51:45,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:51:45,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653757022] [2024-11-14 03:51:45,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:51:45,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:51:45,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:51:45,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:51:45,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:51:45,153 INFO L87 Difference]: Start difference. First operand 1707 states and 2355 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 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 03:51:45,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:51:45,688 INFO L93 Difference]: Finished difference Result 3675 states and 5576 transitions. [2024-11-14 03:51:45,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:51:45,688 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 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 144 [2024-11-14 03:51:45,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:51:45,702 INFO L225 Difference]: With dead ends: 3675 [2024-11-14 03:51:45,702 INFO L226 Difference]: Without dead ends: 2683 [2024-11-14 03:51:45,707 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 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 03:51:45,707 INFO L432 NwaCegarLoop]: 337 mSDtfsCounter, 374 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:51:45,708 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 592 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:51:45,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2683 states. [2024-11-14 03:51:46,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2683 to 2676. [2024-11-14 03:51:46,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2676 states, 2165 states have (on average 1.4009237875288683) internal successors, (3033), 2184 states have internal predecessors, (3033), 337 states have call successors, (337), 154 states have call predecessors, (337), 172 states have return successors, (494), 339 states have call predecessors, (494), 336 states have call successors, (494) [2024-11-14 03:51:46,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2676 states to 2676 states and 3864 transitions. [2024-11-14 03:51:46,150 INFO L78 Accepts]: Start accepts. Automaton has 2676 states and 3864 transitions. Word has length 144 [2024-11-14 03:51:46,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:51:46,150 INFO L471 AbstractCegarLoop]: Abstraction has 2676 states and 3864 transitions. [2024-11-14 03:51:46,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 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 03:51:46,150 INFO L276 IsEmpty]: Start isEmpty. Operand 2676 states and 3864 transitions. [2024-11-14 03:51:46,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2024-11-14 03:51:46,156 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:51:46,156 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 03:51:46,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 03:51:46,357 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:51:46,357 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:51:46,357 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:51:46,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1675436987, now seen corresponding path program 1 times [2024-11-14 03:51:46,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:51:46,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385285038] [2024-11-14 03:51:46,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:51:46,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:51:46,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:51:46,485 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:51:46,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:51:46,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385285038] [2024-11-14 03:51:46,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385285038] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:51:46,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646990034] [2024-11-14 03:51:46,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:51:46,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:51:46,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:51:46,488 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:51:46,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 03:51:46,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:51:46,742 INFO L255 TraceCheckSpWp]: Trace formula consists of 988 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:51:46,746 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:51:46,779 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-14 03:51:46,780 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:51:46,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646990034] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:51:46,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:51:46,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:51:46,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476830926] [2024-11-14 03:51:46,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:51:46,781 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:51:46,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:51:46,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:51:46,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:51:46,781 INFO L87 Difference]: Start difference. First operand 2676 states and 3864 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 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 03:51:47,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:51:47,435 INFO L93 Difference]: Finished difference Result 6567 states and 10204 transitions. [2024-11-14 03:51:47,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:51:47,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 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 144 [2024-11-14 03:51:47,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:51:47,457 INFO L225 Difference]: With dead ends: 6567 [2024-11-14 03:51:47,458 INFO L226 Difference]: Without dead ends: 4606 [2024-11-14 03:51:47,467 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 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 03:51:47,467 INFO L432 NwaCegarLoop]: 337 mSDtfsCounter, 377 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:51:47,468 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 592 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:51:47,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4606 states. [2024-11-14 03:51:47,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4606 to 4594. [2024-11-14 03:51:47,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4594 states, 3814 states have (on average 1.433927635028841) internal successors, (5469), 3839 states have internal predecessors, (5469), 546 states have call successors, (546), 214 states have call predecessors, (546), 232 states have return successors, (823), 542 states have call predecessors, (823), 545 states have call successors, (823) [2024-11-14 03:51:47,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4594 states to 4594 states and 6838 transitions. [2024-11-14 03:51:47,975 INFO L78 Accepts]: Start accepts. Automaton has 4594 states and 6838 transitions. Word has length 144 [2024-11-14 03:51:47,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:51:47,975 INFO L471 AbstractCegarLoop]: Abstraction has 4594 states and 6838 transitions. [2024-11-14 03:51:47,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 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 03:51:47,975 INFO L276 IsEmpty]: Start isEmpty. Operand 4594 states and 6838 transitions. [2024-11-14 03:51:47,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2024-11-14 03:51:47,984 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:51:47,984 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 03:51:48,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 03:51:48,184 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:51:48,185 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:51:48,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:51:48,185 INFO L85 PathProgramCache]: Analyzing trace with hash 634647811, now seen corresponding path program 1 times [2024-11-14 03:51:48,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:51:48,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483992865] [2024-11-14 03:51:48,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:51:48,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:51:48,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:51:48,311 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:51:48,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:51:48,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483992865] [2024-11-14 03:51:48,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483992865] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:51:48,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744080726] [2024-11-14 03:51:48,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:51:48,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:51:48,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:51:48,314 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:51:48,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 03:51:48,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:51:48,559 INFO L255 TraceCheckSpWp]: Trace formula consists of 982 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:51:48,562 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:51:48,602 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-14 03:51:48,602 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:51:48,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744080726] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:51:48,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:51:48,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:51:48,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111745405] [2024-11-14 03:51:48,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:51:48,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:51:48,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:51:48,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:51:48,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:51:48,604 INFO L87 Difference]: Start difference. First operand 4594 states and 6838 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 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 03:51:49,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:51:49,451 INFO L93 Difference]: Finished difference Result 12291 states and 19319 transitions. [2024-11-14 03:51:49,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:51:49,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 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 144 [2024-11-14 03:51:49,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:51:49,533 INFO L225 Difference]: With dead ends: 12291 [2024-11-14 03:51:49,533 INFO L226 Difference]: Without dead ends: 8412 [2024-11-14 03:51:49,552 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 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 03:51:49,553 INFO L432 NwaCegarLoop]: 337 mSDtfsCounter, 368 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:51:49,553 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 592 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:51:49,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8412 states. [2024-11-14 03:51:50,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8412 to 8390. [2024-11-14 03:51:50,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8390 states, 7082 states have (on average 1.4517085569048291) internal successors, (10281), 7119 states have internal predecessors, (10281), 954 states have call successors, (954), 334 states have call predecessors, (954), 352 states have return successors, (1463), 938 states have call predecessors, (1463), 953 states have call successors, (1463) [2024-11-14 03:51:50,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8390 states to 8390 states and 12698 transitions. [2024-11-14 03:51:50,415 INFO L78 Accepts]: Start accepts. Automaton has 8390 states and 12698 transitions. Word has length 144 [2024-11-14 03:51:50,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:51:50,415 INFO L471 AbstractCegarLoop]: Abstraction has 8390 states and 12698 transitions. [2024-11-14 03:51:50,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 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 03:51:50,415 INFO L276 IsEmpty]: Start isEmpty. Operand 8390 states and 12698 transitions. [2024-11-14 03:51:50,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2024-11-14 03:51:50,427 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:51:50,428 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 03:51:50,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-14 03:51:50,628 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:51:50,628 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:51:50,629 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:51:50,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1546022533, now seen corresponding path program 1 times [2024-11-14 03:51:50,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:51:50,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932283667] [2024-11-14 03:51:50,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:51:50,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:51:50,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:51:50,803 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:51:50,803 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:51:50,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932283667] [2024-11-14 03:51:50,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932283667] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:51:50,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302438763] [2024-11-14 03:51:50,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:51:50,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:51:50,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:51:50,806 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:51:50,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 03:51:51,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:51:51,037 INFO L255 TraceCheckSpWp]: Trace formula consists of 976 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:51:51,039 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:51:51,113 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 03:51:51,114 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:51:51,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302438763] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:51:51,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:51:51,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:51:51,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136397293] [2024-11-14 03:51:51,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:51:51,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:51:51,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:51:51,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:51:51,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:51:51,116 INFO L87 Difference]: Start difference. First operand 8390 states and 12698 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 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 03:51:52,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:51:52,360 INFO L93 Difference]: Finished difference Result 23619 states and 37267 transitions. [2024-11-14 03:51:52,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:51:52,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 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 144 [2024-11-14 03:51:52,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:51:52,436 INFO L225 Difference]: With dead ends: 23619 [2024-11-14 03:51:52,436 INFO L226 Difference]: Without dead ends: 15944 [2024-11-14 03:51:52,467 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 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 03:51:52,469 INFO L432 NwaCegarLoop]: 337 mSDtfsCounter, 347 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:51:52,470 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 592 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:51:52,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15944 states. [2024-11-14 03:51:53,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15944 to 15902. [2024-11-14 03:51:53,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15902 states, 13558 states have (on average 1.459286030387963) internal successors, (19785), 13619 states have internal predecessors, (19785), 1750 states have call successors, (1750), 574 states have call predecessors, (1750), 592 states have return successors, (2707), 1710 states have call predecessors, (2707), 1749 states have call successors, (2707) [2024-11-14 03:51:53,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15902 states to 15902 states and 24242 transitions. [2024-11-14 03:51:53,873 INFO L78 Accepts]: Start accepts. Automaton has 15902 states and 24242 transitions. Word has length 144 [2024-11-14 03:51:53,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:51:53,873 INFO L471 AbstractCegarLoop]: Abstraction has 15902 states and 24242 transitions. [2024-11-14 03:51:53,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 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 03:51:53,874 INFO L276 IsEmpty]: Start isEmpty. Operand 15902 states and 24242 transitions. [2024-11-14 03:51:53,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2024-11-14 03:51:53,892 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:51:53,892 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 03:51:53,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-14 03:51:54,093 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:51:54,093 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:51:54,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:51:54,094 INFO L85 PathProgramCache]: Analyzing trace with hash 190367683, now seen corresponding path program 1 times [2024-11-14 03:51:54,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:51:54,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893705248] [2024-11-14 03:51:54,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:51:54,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:51:54,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:51:54,216 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:51:54,216 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:51:54,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893705248] [2024-11-14 03:51:54,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893705248] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:51:54,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580325687] [2024-11-14 03:51:54,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:51:54,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:51:54,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:51:54,219 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:51:54,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 03:51:54,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:51:54,461 INFO L255 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:51:54,464 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:51:54,531 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 03:51:54,531 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:51:54,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580325687] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:51:54,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:51:54,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:51:54,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699182726] [2024-11-14 03:51:54,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:51:54,533 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:51:54,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:51:54,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:51:54,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:51:54,535 INFO L87 Difference]: Start difference. First operand 15902 states and 24242 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 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 03:51:56,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:51:56,846 INFO L93 Difference]: Finished difference Result 46035 states and 72599 transitions. [2024-11-14 03:51:56,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:51:56,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 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 144 [2024-11-14 03:51:56,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:51:56,986 INFO L225 Difference]: With dead ends: 46035 [2024-11-14 03:51:56,986 INFO L226 Difference]: Without dead ends: 30848 [2024-11-14 03:51:57,029 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 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 03:51:57,030 INFO L432 NwaCegarLoop]: 337 mSDtfsCounter, 356 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:51:57,030 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 592 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:51:57,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30848 states. [2024-11-14 03:51:59,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30848 to 30766. [2024-11-14 03:51:59,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30766 states, 26390 states have (on average 1.4608942781356575) internal successors, (38553), 26499 states have internal predecessors, (38553), 3302 states have call successors, (3302), 1054 states have call predecessors, (3302), 1072 states have return successors, (5123), 3214 states have call predecessors, (5123), 3301 states have call successors, (5123) [2024-11-14 03:51:59,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30766 states to 30766 states and 46978 transitions. [2024-11-14 03:51:59,566 INFO L78 Accepts]: Start accepts. Automaton has 30766 states and 46978 transitions. Word has length 144 [2024-11-14 03:51:59,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:51:59,567 INFO L471 AbstractCegarLoop]: Abstraction has 30766 states and 46978 transitions. [2024-11-14 03:51:59,567 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 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 03:51:59,567 INFO L276 IsEmpty]: Start isEmpty. Operand 30766 states and 46978 transitions. [2024-11-14 03:51:59,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2024-11-14 03:51:59,599 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:51:59,600 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 03:51:59,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-14 03:51:59,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-14 03:51:59,804 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:51:59,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:51:59,805 INFO L85 PathProgramCache]: Analyzing trace with hash 109311045, now seen corresponding path program 1 times [2024-11-14 03:51:59,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:51:59,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541027405] [2024-11-14 03:51:59,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:51:59,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:51:59,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:51:59,939 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:51:59,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:51:59,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541027405] [2024-11-14 03:51:59,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541027405] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:51:59,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32036636] [2024-11-14 03:51:59,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:51:59,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:51:59,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:51:59,942 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:51:59,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 03:52:00,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:52:00,185 INFO L255 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:52:00,189 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:52:00,239 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-14 03:52:00,239 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:52:00,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32036636] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:52:00,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:52:00,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:52:00,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342067273] [2024-11-14 03:52:00,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:52:00,240 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:52:00,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:52:00,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:52:00,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:52:00,242 INFO L87 Difference]: Start difference. First operand 30766 states and 46978 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 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 03:52:05,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:52:05,005 INFO L93 Difference]: Finished difference Result 90387 states and 142135 transitions. [2024-11-14 03:52:05,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:52:05,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 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 144 [2024-11-14 03:52:05,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:52:05,230 INFO L225 Difference]: With dead ends: 90387 [2024-11-14 03:52:05,230 INFO L226 Difference]: Without dead ends: 60336 [2024-11-14 03:52:05,326 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 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 03:52:05,327 INFO L432 NwaCegarLoop]: 337 mSDtfsCounter, 362 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:52:05,328 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 592 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:52:05,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60336 states. [2024-11-14 03:52:11,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60336 to 60174. [2024-11-14 03:52:11,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60174 states, 51814 states have (on average 1.4592388157640792) internal successors, (75609), 52019 states have internal predecessors, (75609), 6326 states have call successors, (6326), 2014 states have call predecessors, (6326), 2032 states have return successors, (9811), 6142 states have call predecessors, (9811), 6325 states have call successors, (9811) [2024-11-14 03:52:11,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60174 states to 60174 states and 91746 transitions. [2024-11-14 03:52:11,444 INFO L78 Accepts]: Start accepts. Automaton has 60174 states and 91746 transitions. Word has length 144 [2024-11-14 03:52:11,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:52:11,445 INFO L471 AbstractCegarLoop]: Abstraction has 60174 states and 91746 transitions. [2024-11-14 03:52:11,445 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 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 03:52:11,445 INFO L276 IsEmpty]: Start isEmpty. Operand 60174 states and 91746 transitions. [2024-11-14 03:52:11,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2024-11-14 03:52:11,496 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:52:11,496 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 03:52:11,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-14 03:52:11,696 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:52:11,696 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:52:11,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:52:11,697 INFO L85 PathProgramCache]: Analyzing trace with hash 612906823, now seen corresponding path program 1 times [2024-11-14 03:52:11,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:52:11,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369942466] [2024-11-14 03:52:11,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:52:11,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:52:11,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:52:11,823 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:52:11,824 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:52:11,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369942466] [2024-11-14 03:52:11,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369942466] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:52:11,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314929145] [2024-11-14 03:52:11,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:52:11,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:52:11,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:52:11,827 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:52:11,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a9cef5f-2d80-4873-9044-a97ba62f7303/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-14 03:52:12,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:52:12,068 INFO L255 TraceCheckSpWp]: Trace formula consists of 958 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:52:12,072 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:52:12,140 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 03:52:12,140 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:52:12,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314929145] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:52:12,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:52:12,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:52:12,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401491562] [2024-11-14 03:52:12,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:52:12,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:52:12,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:52:12,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:52:12,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:52:12,143 INFO L87 Difference]: Start difference. First operand 60174 states and 91746 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 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 03:52:19,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:52:19,793 INFO L93 Difference]: Finished difference Result 178131 states and 278951 transitions. [2024-11-14 03:52:19,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:52:19,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 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 144 [2024-11-14 03:52:19,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:52:20,237 INFO L225 Difference]: With dead ends: 178131 [2024-11-14 03:52:20,238 INFO L226 Difference]: Without dead ends: 118672 [2024-11-14 03:52:20,424 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 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 03:52:20,425 INFO L432 NwaCegarLoop]: 337 mSDtfsCounter, 353 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:52:20,425 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 592 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:52:20,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118672 states.