./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje --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 dbdff9d5cdb7ffcae57151b3d045900600728670d8aad942a459f8d05b6221fb --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 07:15:42,937 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 07:15:43,035 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 07:15:43,041 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 07:15:43,042 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 07:15:43,086 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 07:15:43,089 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 07:15:43,090 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 07:15:43,090 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 07:15:43,091 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 07:15:43,091 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 07:15:43,092 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 07:15:43,092 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 07:15:43,095 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 07:15:43,095 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 07:15:43,096 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 07:15:43,096 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 07:15:43,096 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 07:15:43,097 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 07:15:43,097 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 07:15:43,098 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 07:15:43,105 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 07:15:43,106 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 07:15:43,106 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 07:15:43,107 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 07:15:43,107 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 07:15:43,107 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 07:15:43,107 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 07:15:43,108 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 07:15:43,108 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 07:15:43,108 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 07:15:43,110 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 07:15:43,111 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 07:15:43,111 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 07:15:43,111 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 07:15:43,112 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 07:15:43,113 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 07:15:43,115 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 07:15:43,115 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 07:15:43,116 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 07:15:43,116 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 07:15:43,117 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 07:15:43,117 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 07:15:43,118 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 07:15:43,118 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 07:15:43,118 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 07:15:43,119 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 07:15:43,119 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dbdff9d5cdb7ffcae57151b3d045900600728670d8aad942a459f8d05b6221fb [2024-11-09 07:15:43,487 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 07:15:43,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 07:15:43,528 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 07:15:43,530 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 07:15:43,530 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 07:15:43,531 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-2.c Unable to find full path for "g++" [2024-11-09 07:15:46,045 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 07:15:46,311 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 07:15:46,312 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-2.c [2024-11-09 07:15:46,341 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/data/df8db8ef8/16df0d4c3f8145f4b9ca4a5e73c9f450/FLAG35eec87aa [2024-11-09 07:15:46,620 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/data/df8db8ef8/16df0d4c3f8145f4b9ca4a5e73c9f450 [2024-11-09 07:15:46,624 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 07:15:46,626 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 07:15:46,628 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 07:15:46,628 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 07:15:46,637 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 07:15:46,638 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:15:46" (1/1) ... [2024-11-09 07:15:46,640 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4155dfce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:15:46, skipping insertion in model container [2024-11-09 07:15:46,640 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:15:46" (1/1) ... [2024-11-09 07:15:46,714 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 07:15:47,009 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_1fbfbd13-000a-438c-ab1b-ec5546800f30/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-2.c[914,927] [2024-11-09 07:15:47,087 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_1fbfbd13-000a-438c-ab1b-ec5546800f30/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-2.c[7115,7128] [2024-11-09 07:15:47,294 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:15:47,310 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 07:15:47,330 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_1fbfbd13-000a-438c-ab1b-ec5546800f30/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-2.c[914,927] [2024-11-09 07:15:47,380 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_1fbfbd13-000a-438c-ab1b-ec5546800f30/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-2.c[7115,7128] [2024-11-09 07:15:47,451 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:15:47,505 INFO L204 MainTranslator]: Completed translation [2024-11-09 07:15:47,506 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:15:47 WrapperNode [2024-11-09 07:15:47,506 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 07:15:47,507 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 07:15:47,508 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 07:15:47,508 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 07:15:47,518 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:15:47" (1/1) ... [2024-11-09 07:15:47,545 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:15:47" (1/1) ... [2024-11-09 07:15:47,611 INFO L138 Inliner]: procedures = 73, calls = 87, calls flagged for inlining = 42, calls inlined = 42, statements flattened = 931 [2024-11-09 07:15:47,612 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 07:15:47,613 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 07:15:47,616 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 07:15:47,617 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 07:15:47,631 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:15:47" (1/1) ... [2024-11-09 07:15:47,632 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:15:47" (1/1) ... [2024-11-09 07:15:47,641 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:15:47" (1/1) ... [2024-11-09 07:15:47,645 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:15:47" (1/1) ... [2024-11-09 07:15:47,674 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:15:47" (1/1) ... [2024-11-09 07:15:47,690 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:15:47" (1/1) ... [2024-11-09 07:15:47,695 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:15:47" (1/1) ... [2024-11-09 07:15:47,699 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:15:47" (1/1) ... [2024-11-09 07:15:47,706 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 07:15:47,707 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 07:15:47,708 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 07:15:47,708 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 07:15:47,709 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:15:47" (1/1) ... [2024-11-09 07:15:47,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 07:15:47,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:15:47,750 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 07:15:47,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 07:15:47,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 07:15:47,791 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-09 07:15:47,792 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-09 07:15:47,792 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2024-11-09 07:15:47,792 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2024-11-09 07:15:47,792 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2024-11-09 07:15:47,792 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2024-11-09 07:15:47,792 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2024-11-09 07:15:47,793 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2024-11-09 07:15:47,793 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2024-11-09 07:15:47,793 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2024-11-09 07:15:47,793 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2024-11-09 07:15:47,793 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2024-11-09 07:15:47,793 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2024-11-09 07:15:47,794 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2024-11-09 07:15:47,794 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2024-11-09 07:15:47,794 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2024-11-09 07:15:47,795 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2024-11-09 07:15:47,796 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2024-11-09 07:15:47,796 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2024-11-09 07:15:47,796 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2024-11-09 07:15:47,796 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2024-11-09 07:15:47,796 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2024-11-09 07:15:47,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 07:15:47,797 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2024-11-09 07:15:47,797 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2024-11-09 07:15:47,797 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2024-11-09 07:15:47,797 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2024-11-09 07:15:47,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 07:15:47,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 07:15:47,798 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2024-11-09 07:15:47,798 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2024-11-09 07:15:47,970 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 07:15:47,972 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 07:15:49,510 INFO L? ?]: Removed 115 outVars from TransFormulas that were not future-live. [2024-11-09 07:15:49,510 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 07:15:50,379 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 07:15:50,379 INFO L316 CfgBuilder]: Removed 17 assume(true) statements. [2024-11-09 07:15:50,380 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:15:50 BoogieIcfgContainer [2024-11-09 07:15:50,380 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 07:15:50,384 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 07:15:50,386 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 07:15:50,390 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 07:15:50,390 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 07:15:46" (1/3) ... [2024-11-09 07:15:50,391 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@109ea7eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:15:50, skipping insertion in model container [2024-11-09 07:15:50,392 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:15:47" (2/3) ... [2024-11-09 07:15:50,392 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@109ea7eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:15:50, skipping insertion in model container [2024-11-09 07:15:50,393 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:15:50" (3/3) ... [2024-11-09 07:15:50,395 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.10.cil-2.c [2024-11-09 07:15:50,421 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 07:15:50,421 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-09 07:15:50,518 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 07:15:50,527 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;@563f3747, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 07:15:50,527 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-09 07:15:50,533 INFO L276 IsEmpty]: Start isEmpty. Operand has 249 states, 194 states have (on average 1.5051546391752577) internal successors, (292), 200 states have internal predecessors, (292), 38 states have call successors, (38), 14 states have call predecessors, (38), 14 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2024-11-09 07:15:50,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-09 07:15:50,550 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:15:50,551 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] [2024-11-09 07:15:50,552 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:15:50,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:15:50,560 INFO L85 PathProgramCache]: Analyzing trace with hash 582930060, now seen corresponding path program 1 times [2024-11-09 07:15:50,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:15:50,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168079294] [2024-11-09 07:15:50,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:15:50,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:15:50,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:15:51,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:15:51,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:15:51,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168079294] [2024-11-09 07:15:51,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168079294] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:15:51,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:15:51,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 07:15:51,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856325413] [2024-11-09 07:15:51,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:15:51,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 07:15:51,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:15:51,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 07:15:51,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 07:15:51,144 INFO L87 Difference]: Start difference. First operand has 249 states, 194 states have (on average 1.5051546391752577) internal successors, (292), 200 states have internal predecessors, (292), 38 states have call successors, (38), 14 states have call predecessors, (38), 14 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) 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) [2024-11-09 07:15:51,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:15:51,893 INFO L93 Difference]: Finished difference Result 549 states and 807 transitions. [2024-11-09 07:15:51,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 07:15:51,896 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 [2024-11-09 07:15:51,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:15:51,912 INFO L225 Difference]: With dead ends: 549 [2024-11-09 07:15:51,912 INFO L226 Difference]: Without dead ends: 304 [2024-11-09 07:15:51,918 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 [2024-11-09 07:15:51,922 INFO L432 NwaCegarLoop]: 354 mSDtfsCounter, 416 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 07:15:51,923 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 614 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 07:15:51,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2024-11-09 07:15:52,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 297. [2024-11-09 07:15:52,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 229 states have (on average 1.4192139737991267) internal successors, (325), 233 states have internal predecessors, (325), 46 states have call successors, (46), 21 states have call predecessors, (46), 20 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-11-09 07:15:52,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 415 transitions. [2024-11-09 07:15:52,045 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 415 transitions. Word has length 45 [2024-11-09 07:15:52,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:15:52,046 INFO L471 AbstractCegarLoop]: Abstraction has 297 states and 415 transitions. [2024-11-09 07:15:52,046 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) [2024-11-09 07:15:52,047 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 415 transitions. [2024-11-09 07:15:52,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-09 07:15:52,050 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:15:52,050 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] [2024-11-09 07:15:52,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 07:15:52,051 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:15:52,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:15:52,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1501904683, now seen corresponding path program 1 times [2024-11-09 07:15:52,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:15:52,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733057855] [2024-11-09 07:15:52,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:15:52,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:15:52,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:15:52,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:15:52,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:15:52,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733057855] [2024-11-09 07:15:52,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733057855] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:15:52,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:15:52,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-09 07:15:52,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353037575] [2024-11-09 07:15:52,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:15:52,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 07:15:52,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:15:52,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 07:15:52,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-09 07:15:52,532 INFO L87 Difference]: Start difference. First operand 297 states and 415 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 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) [2024-11-09 07:15:53,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:15:53,971 INFO L93 Difference]: Finished difference Result 478 states and 636 transitions. [2024-11-09 07:15:53,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 07:15:53,972 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 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 45 [2024-11-09 07:15:53,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:15:53,980 INFO L225 Difference]: With dead ends: 478 [2024-11-09 07:15:53,981 INFO L226 Difference]: Without dead ends: 362 [2024-11-09 07:15:53,984 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2024-11-09 07:15:53,990 INFO L432 NwaCegarLoop]: 199 mSDtfsCounter, 504 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:15:53,990 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 1069 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-09 07:15:53,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2024-11-09 07:15:54,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 349. [2024-11-09 07:15:54,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 266 states have (on average 1.3984962406015038) internal successors, (372), 270 states have internal predecessors, (372), 54 states have call successors, (54), 28 states have call predecessors, (54), 27 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2024-11-09 07:15:54,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 478 transitions. [2024-11-09 07:15:54,085 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 478 transitions. Word has length 45 [2024-11-09 07:15:54,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:15:54,088 INFO L471 AbstractCegarLoop]: Abstraction has 349 states and 478 transitions. [2024-11-09 07:15:54,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 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) [2024-11-09 07:15:54,089 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 478 transitions. [2024-11-09 07:15:54,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-09 07:15:54,094 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:15:54,094 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] [2024-11-09 07:15:54,094 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 07:15:54,095 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:15:54,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:15:54,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1356297845, now seen corresponding path program 1 times [2024-11-09 07:15:54,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:15:54,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637230680] [2024-11-09 07:15:54,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:15:54,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:15:54,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:15:54,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:15:54,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:15:54,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637230680] [2024-11-09 07:15:54,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637230680] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:15:54,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:15:54,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 07:15:54,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931564054] [2024-11-09 07:15:54,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:15:54,212 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:15:54,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:15:54,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:15:54,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:15:54,215 INFO L87 Difference]: Start difference. First operand 349 states and 478 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2024-11-09 07:15:54,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:15:54,438 INFO L93 Difference]: Finished difference Result 677 states and 884 transitions. [2024-11-09 07:15:54,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:15:54,438 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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 46 [2024-11-09 07:15:54,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:15:54,443 INFO L225 Difference]: With dead ends: 677 [2024-11-09 07:15:54,443 INFO L226 Difference]: Without dead ends: 508 [2024-11-09 07:15:54,445 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 [2024-11-09 07:15:54,446 INFO L432 NwaCegarLoop]: 294 mSDtfsCounter, 327 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:15:54,447 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 356 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 07:15:54,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2024-11-09 07:15:54,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 489. [2024-11-09 07:15:54,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 361 states have (on average 1.335180055401662) internal successors, (482), 365 states have internal predecessors, (482), 78 states have call successors, (78), 49 states have call predecessors, (78), 48 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2024-11-09 07:15:54,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 636 transitions. [2024-11-09 07:15:54,531 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 636 transitions. Word has length 46 [2024-11-09 07:15:54,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:15:54,533 INFO L471 AbstractCegarLoop]: Abstraction has 489 states and 636 transitions. [2024-11-09 07:15:54,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2024-11-09 07:15:54,533 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 636 transitions. [2024-11-09 07:15:54,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-09 07:15:54,539 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:15:54,540 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] [2024-11-09 07:15:54,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 07:15:54,540 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:15:54,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:15:54,541 INFO L85 PathProgramCache]: Analyzing trace with hash -210557588, now seen corresponding path program 1 times [2024-11-09 07:15:54,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:15:54,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12852476] [2024-11-09 07:15:54,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:15:54,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:15:54,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:15:54,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:15:54,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:15:54,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12852476] [2024-11-09 07:15:54,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12852476] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:15:54,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:15:54,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 07:15:54,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794113366] [2024-11-09 07:15:54,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:15:54,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:15:54,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:15:54,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:15:54,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:15:54,673 INFO L87 Difference]: Start difference. First operand 489 states and 636 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) [2024-11-09 07:15:54,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:15:54,986 INFO L93 Difference]: Finished difference Result 859 states and 1081 transitions. [2024-11-09 07:15:54,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:15:54,987 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 [2024-11-09 07:15:54,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:15:54,993 INFO L225 Difference]: With dead ends: 859 [2024-11-09 07:15:54,994 INFO L226 Difference]: Without dead ends: 596 [2024-11-09 07:15:54,995 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 [2024-11-09 07:15:54,997 INFO L432 NwaCegarLoop]: 301 mSDtfsCounter, 67 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:15:54,998 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 573 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 07:15:55,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2024-11-09 07:15:55,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 590. [2024-11-09 07:15:55,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 432 states have (on average 1.3194444444444444) internal successors, (570), 436 states have internal predecessors, (570), 94 states have call successors, (94), 63 states have call predecessors, (94), 62 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2024-11-09 07:15:55,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 756 transitions. [2024-11-09 07:15:55,078 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 756 transitions. Word has length 47 [2024-11-09 07:15:55,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:15:55,079 INFO L471 AbstractCegarLoop]: Abstraction has 590 states and 756 transitions. [2024-11-09 07:15:55,079 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) [2024-11-09 07:15:55,079 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 756 transitions. [2024-11-09 07:15:55,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-09 07:15:55,083 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:15:55,083 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] [2024-11-09 07:15:55,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 07:15:55,084 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:15:55,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:15:55,084 INFO L85 PathProgramCache]: Analyzing trace with hash -372942999, now seen corresponding path program 1 times [2024-11-09 07:15:55,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:15:55,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075201670] [2024-11-09 07:15:55,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:15:55,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:15:55,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:15:55,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:15:55,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:15:55,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075201670] [2024-11-09 07:15:55,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075201670] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:15:55,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:15:55,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 07:15:55,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448713456] [2024-11-09 07:15:55,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:15:55,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 07:15:55,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:15:55,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 07:15:55,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 07:15:55,226 INFO L87 Difference]: Start difference. First operand 590 states and 756 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) [2024-11-09 07:15:55,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:15:55,755 INFO L93 Difference]: Finished difference Result 697 states and 882 transitions. [2024-11-09 07:15:55,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 07:15:55,757 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 [2024-11-09 07:15:55,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:15:55,763 INFO L225 Difference]: With dead ends: 697 [2024-11-09 07:15:55,763 INFO L226 Difference]: Without dead ends: 694 [2024-11-09 07:15:55,764 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 [2024-11-09 07:15:55,767 INFO L432 NwaCegarLoop]: 298 mSDtfsCounter, 590 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 07:15:55,772 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [590 Valid, 339 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 07:15:55,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2024-11-09 07:15:55,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 589. [2024-11-09 07:15:55,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 432 states have (on average 1.3125) internal successors, (567), 435 states have internal predecessors, (567), 93 states have call successors, (93), 63 states have call predecessors, (93), 62 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2024-11-09 07:15:55,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 752 transitions. [2024-11-09 07:15:55,869 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 752 transitions. Word has length 54 [2024-11-09 07:15:55,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:15:55,872 INFO L471 AbstractCegarLoop]: Abstraction has 589 states and 752 transitions. [2024-11-09 07:15:55,872 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) [2024-11-09 07:15:55,873 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 752 transitions. [2024-11-09 07:15:55,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-09 07:15:55,877 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:15:55,877 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] [2024-11-09 07:15:55,878 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 07:15:55,878 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:15:55,878 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:15:55,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1322383796, now seen corresponding path program 1 times [2024-11-09 07:15:55,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:15:55,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623589143] [2024-11-09 07:15:55,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:15:55,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:15:55,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:15:56,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:15:56,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:15:56,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623589143] [2024-11-09 07:15:56,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623589143] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:15:56,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443089808] [2024-11-09 07:15:56,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:15:56,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:15:56,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:15:56,122 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:15:56,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 07:15:56,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:15:56,292 INFO L255 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 07:15:56,300 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:15:56,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:15:56,717 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:15:56,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:15:56,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443089808] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:15:56,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1385862267] [2024-11-09 07:15:56,896 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2024-11-09 07:15:56,897 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:15:56,901 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:15:56,909 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:15:56,910 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:16:06,363 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 191 for LOIs [2024-11-09 07:16:06,484 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 187 for LOIs [2024-11-09 07:16:06,648 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 195 for LOIs [2024-11-09 07:16:08,168 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 191 for LOIs [2024-11-09 07:16:08,613 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 191 for LOIs [2024-11-09 07:16:08,928 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 191 for LOIs [2024-11-09 07:16:09,066 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 198 for LOIs [2024-11-09 07:16:09,206 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:16:37,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1385862267] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:16:37,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:16:37,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [5, 5, 4] total 36 [2024-11-09 07:16:37,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459471257] [2024-11-09 07:16:37,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:16:37,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-09 07:16:37,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:16:37,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-09 07:16:37,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 07:16:37,523 INFO L87 Difference]: Start difference. First operand 589 states and 752 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) [2024-11-09 07:16:58,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:16:58,532 INFO L93 Difference]: Finished difference Result 1024 states and 1267 transitions. [2024-11-09 07:16:58,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-09 07:16:58,533 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 [2024-11-09 07:16:58,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:16:58,538 INFO L225 Difference]: With dead ends: 1024 [2024-11-09 07:16:58,539 INFO L226 Difference]: Without dead ends: 616 [2024-11-09 07:16:58,541 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 131 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 41.9s TimeCoverageRelationStatistics Valid=405, Invalid=1947, Unknown=0, NotChecked=0, Total=2352 [2024-11-09 07:16:58,542 INFO L432 NwaCegarLoop]: 279 mSDtfsCounter, 182 mSDsluCounter, 1160 mSDsCounter, 0 mSdLazyCounter, 2642 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1439 SdHoareTripleChecker+Invalid, 2788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 2642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:16:58,543 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 1439 Invalid, 2788 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [146 Valid, 2642 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2024-11-09 07:16:58,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2024-11-09 07:16:58,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 608. [2024-11-09 07:16:58,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 449 states have (on average 1.3073496659242763) internal successors, (587), 452 states have internal predecessors, (587), 94 states have call successors, (94), 64 states have call predecessors, (94), 63 states have return successors, (93), 93 states have call predecessors, (93), 93 states have call successors, (93) [2024-11-09 07:16:58,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 774 transitions. [2024-11-09 07:16:58,674 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 774 transitions. Word has length 55 [2024-11-09 07:16:58,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:16:58,675 INFO L471 AbstractCegarLoop]: Abstraction has 608 states and 774 transitions. [2024-11-09 07:16:58,676 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) [2024-11-09 07:16:58,676 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 774 transitions. [2024-11-09 07:16:58,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-09 07:16:58,677 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:16:58,678 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] [2024-11-09 07:16:58,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 07:16:58,878 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:16:58,879 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:16:58,879 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:16:58,880 INFO L85 PathProgramCache]: Analyzing trace with hash -240205856, now seen corresponding path program 1 times [2024-11-09 07:16:58,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:16:58,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002493447] [2024-11-09 07:16:58,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:16:58,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:16:58,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:16:58,994 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 07:16:58,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:16:58,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002493447] [2024-11-09 07:16:58,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002493447] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:16:58,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:16:58,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 07:16:58,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515088071] [2024-11-09 07:16:58,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:16:58,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:16:58,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:16:58,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:16:58,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:16:58,998 INFO L87 Difference]: Start difference. First operand 608 states and 774 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) [2024-11-09 07:16:59,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:16:59,333 INFO L93 Difference]: Finished difference Result 1055 states and 1310 transitions. [2024-11-09 07:16:59,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:16:59,334 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 [2024-11-09 07:16:59,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:16:59,340 INFO L225 Difference]: With dead ends: 1055 [2024-11-09 07:16:59,340 INFO L226 Difference]: Without dead ends: 789 [2024-11-09 07:16:59,341 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 [2024-11-09 07:16:59,342 INFO L432 NwaCegarLoop]: 326 mSDtfsCounter, 43 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:16:59,343 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 615 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 07:16:59,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2024-11-09 07:16:59,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 660. [2024-11-09 07:16:59,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 491 states have (on average 1.3034623217922607) internal successors, (640), 494 states have internal predecessors, (640), 99 states have call successors, (99), 69 states have call predecessors, (99), 68 states have return successors, (98), 98 states have call predecessors, (98), 98 states have call successors, (98) [2024-11-09 07:16:59,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 837 transitions. [2024-11-09 07:16:59,480 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 837 transitions. Word has length 61 [2024-11-09 07:16:59,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:16:59,481 INFO L471 AbstractCegarLoop]: Abstraction has 660 states and 837 transitions. [2024-11-09 07:16:59,481 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) [2024-11-09 07:16:59,481 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 837 transitions. [2024-11-09 07:16:59,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-09 07:16:59,483 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:16:59,483 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] [2024-11-09 07:16:59,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 07:16:59,483 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:16:59,484 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:16:59,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1881168040, now seen corresponding path program 1 times [2024-11-09 07:16:59,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:16:59,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299039175] [2024-11-09 07:16:59,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:16:59,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:16:59,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:16:59,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:16:59,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:16:59,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299039175] [2024-11-09 07:16:59,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299039175] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:16:59,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:16:59,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 07:16:59,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240628746] [2024-11-09 07:16:59,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:16:59,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 07:16:59,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:16:59,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 07:16:59,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 07:16:59,661 INFO L87 Difference]: Start difference. First operand 660 states and 837 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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) [2024-11-09 07:17:00,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:17:00,941 INFO L93 Difference]: Finished difference Result 1483 states and 2157 transitions. [2024-11-09 07:17:00,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 07:17:00,942 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 61 [2024-11-09 07:17:00,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:17:00,952 INFO L225 Difference]: With dead ends: 1483 [2024-11-09 07:17:00,952 INFO L226 Difference]: Without dead ends: 1313 [2024-11-09 07:17:00,954 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 [2024-11-09 07:17:00,955 INFO L432 NwaCegarLoop]: 482 mSDtfsCounter, 1319 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1320 SdHoareTripleChecker+Valid, 1240 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:17:00,956 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1320 Valid, 1240 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 07:17:00,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2024-11-09 07:17:01,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 1302. [2024-11-09 07:17:01,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1032 states have (on average 1.3934108527131783) internal successors, (1438), 1038 states have internal predecessors, (1438), 176 states have call successors, (176), 93 states have call predecessors, (176), 92 states have return successors, (229), 172 states have call predecessors, (229), 175 states have call successors, (229) [2024-11-09 07:17:01,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 1843 transitions. [2024-11-09 07:17:01,166 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 1843 transitions. Word has length 61 [2024-11-09 07:17:01,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:17:01,167 INFO L471 AbstractCegarLoop]: Abstraction has 1302 states and 1843 transitions. [2024-11-09 07:17:01,167 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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) [2024-11-09 07:17:01,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 1843 transitions. [2024-11-09 07:17:01,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-09 07:17:01,172 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:17:01,172 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] [2024-11-09 07:17:01,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 07:17:01,172 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:17:01,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:17:01,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1726504986, now seen corresponding path program 1 times [2024-11-09 07:17:01,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:17:01,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271915581] [2024-11-09 07:17:01,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:17:01,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:17:01,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:17:01,737 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 07:17:01,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:17:01,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271915581] [2024-11-09 07:17:01,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271915581] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:17:01,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341598654] [2024-11-09 07:17:01,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:17:01,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:17:01,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:17:01,740 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:17:01,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 07:17:01,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:17:01,924 INFO L255 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 07:17:01,929 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:17:02,003 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 07:17:02,004 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:17:02,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341598654] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:17:02,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:17:02,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [14] total 15 [2024-11-09 07:17:02,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715799570] [2024-11-09 07:17:02,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:17:02,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:17:02,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:17:02,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:17:02,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-09 07:17:02,007 INFO L87 Difference]: Start difference. First operand 1302 states and 1843 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (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) [2024-11-09 07:17:02,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:17:02,363 INFO L93 Difference]: Finished difference Result 1635 states and 2252 transitions. [2024-11-09 07:17:02,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:17:02,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (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 [2024-11-09 07:17:02,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:17:02,373 INFO L225 Difference]: With dead ends: 1635 [2024-11-09 07:17:02,373 INFO L226 Difference]: Without dead ends: 1317 [2024-11-09 07:17:02,375 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-09 07:17:02,376 INFO L432 NwaCegarLoop]: 331 mSDtfsCounter, 46 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:17:02,377 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 616 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 07:17:02,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2024-11-09 07:17:02,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 1192. [2024-11-09 07:17:02,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 956 states have (on average 1.3922594142259415) internal successors, (1331), 962 states have internal predecessors, (1331), 158 states have call successors, (158), 77 states have call predecessors, (158), 76 states have return successors, (211), 154 states have call predecessors, (211), 157 states have call successors, (211) [2024-11-09 07:17:02,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1700 transitions. [2024-11-09 07:17:02,572 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1700 transitions. Word has length 102 [2024-11-09 07:17:02,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:17:02,573 INFO L471 AbstractCegarLoop]: Abstraction has 1192 states and 1700 transitions. [2024-11-09 07:17:02,573 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (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) [2024-11-09 07:17:02,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1700 transitions. [2024-11-09 07:17:02,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-09 07:17:02,576 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:17:02,577 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] [2024-11-09 07:17:02,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 07:17:02,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:17:02,778 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:17:02,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:17:02,779 INFO L85 PathProgramCache]: Analyzing trace with hash -149947227, now seen corresponding path program 1 times [2024-11-09 07:17:02,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:17:02,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659732983] [2024-11-09 07:17:02,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:17:02,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:17:02,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:17:03,266 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-09 07:17:03,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:17:03,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659732983] [2024-11-09 07:17:03,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659732983] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:17:03,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353526989] [2024-11-09 07:17:03,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:17:03,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:17:03,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:17:03,270 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:17:03,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 07:17:03,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:17:03,460 INFO L255 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 07:17:03,465 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:17:03,541 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 07:17:03,542 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:17:03,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353526989] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:17:03,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:17:03,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2024-11-09 07:17:03,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431757905] [2024-11-09 07:17:03,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:17:03,543 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 07:17:03,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:17:03,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 07:17:03,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2024-11-09 07:17:03,545 INFO L87 Difference]: Start difference. First operand 1192 states and 1700 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) [2024-11-09 07:17:04,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:17:04,142 INFO L93 Difference]: Finished difference Result 1452 states and 2000 transitions. [2024-11-09 07:17:04,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 07:17:04,143 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 [2024-11-09 07:17:04,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:17:04,152 INFO L225 Difference]: With dead ends: 1452 [2024-11-09 07:17:04,152 INFO L226 Difference]: Without dead ends: 1083 [2024-11-09 07:17:04,159 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 [2024-11-09 07:17:04,160 INFO L432 NwaCegarLoop]: 305 mSDtfsCounter, 278 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 07:17:04,161 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 1222 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 07:17:04,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2024-11-09 07:17:04,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 1079. [2024-11-09 07:17:04,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 881 states have (on average 1.4108967082860386) internal successors, (1243), 887 states have internal predecessors, (1243), 137 states have call successors, (137), 60 states have call predecessors, (137), 59 states have return successors, (190), 133 states have call predecessors, (190), 136 states have call successors, (190) [2024-11-09 07:17:04,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1570 transitions. [2024-11-09 07:17:04,372 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1570 transitions. Word has length 102 [2024-11-09 07:17:04,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:17:04,372 INFO L471 AbstractCegarLoop]: Abstraction has 1079 states and 1570 transitions. [2024-11-09 07:17:04,373 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) [2024-11-09 07:17:04,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1570 transitions. [2024-11-09 07:17:04,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-09 07:17:04,377 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:17:04,378 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] [2024-11-09 07:17:04,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 07:17:04,578 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:17:04,579 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:17:04,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:17:04,580 INFO L85 PathProgramCache]: Analyzing trace with hash -2078241426, now seen corresponding path program 1 times [2024-11-09 07:17:04,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:17:04,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350731513] [2024-11-09 07:17:04,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:17:04,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:17:04,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:17:04,914 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-09 07:17:04,915 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:17:04,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350731513] [2024-11-09 07:17:04,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350731513] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:17:04,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581708295] [2024-11-09 07:17:04,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:17:04,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:17:04,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:17:04,918 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:17:04,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 07:17:05,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:17:05,103 INFO L255 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 07:17:05,108 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:17:05,574 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 07:17:05,575 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:17:05,802 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-09 07:17:05,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581708295] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:17:05,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [152329983] [2024-11-09 07:17:05,807 INFO L159 IcfgInterpreter]: Started Sifa with 65 locations of interest [2024-11-09 07:17:05,807 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:17:05,808 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:17:05,808 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:17:05,808 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:17:35,207 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 229 for LOIs [2024-11-09 07:17:35,811 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 193 for LOIs [2024-11-09 07:17:36,399 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 150 for LOIs [2024-11-09 07:17:36,463 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 214 for LOIs [2024-11-09 07:17:40,458 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 215 for LOIs [2024-11-09 07:17:44,180 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 164 for LOIs [2024-11-09 07:17:44,437 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 208 for LOIs [2024-11-09 07:17:44,972 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 219 for LOIs [2024-11-09 07:17:45,637 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:18:53,627 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25655#(and (= ~q_req_up~0 1) (= ~q_free~0 1) (exists ((|v_ULTIMATE.start_eval1_~tmp___0~2#1_16| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp___0~2#1_16| 0)) (<= |v_ULTIMATE.start_eval1_~tmp___0~2#1_16| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp___0~2#1_16| 2147483648)))) (not (= ~c_num_read~0 ~p_num_write~0)) (exists ((v_~c_last_read~0_10 Int) (v_~q_free~0_44 Int)) (and (<= v_~q_free~0_44 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (not (= ~p_dw_st~0 0)) (<= 1 |#StackHeapBarrier|) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= v_~c_last_read~0_10 0) (= ~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_7~0 2) (= ~E_8~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (= ~E_5~0 2) (<= 0 ~p_num_write~0) (= ~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) (= ~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) (= ~E_2~0 2) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_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) (= 0 ~t4_pc~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))) (= ~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 [2024-11-09 07:18:53,627 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:18:53,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:18:53,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 13 [2024-11-09 07:18:53,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093968189] [2024-11-09 07:18:53,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:18:53,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 07:18:53,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:18:53,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 07:18:53,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=2973, Unknown=0, NotChecked=0, Total=3306 [2024-11-09 07:18:53,632 INFO L87 Difference]: Start difference. First operand 1079 states and 1570 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) [2024-11-09 07:18:59,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:18:59,341 INFO L93 Difference]: Finished difference Result 2019 states and 2657 transitions. [2024-11-09 07:18:59,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-09 07:18:59,343 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 [2024-11-09 07:18:59,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:18:59,356 INFO L225 Difference]: With dead ends: 2019 [2024-11-09 07:18:59,356 INFO L226 Difference]: Without dead ends: 1837 [2024-11-09 07:18:59,363 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 274 SyntacticMatches, 6 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 4742 ImplicationChecksByTransitivity, 70.8s TimeCoverageRelationStatistics Valid=1088, Invalid=12252, Unknown=0, NotChecked=0, Total=13340 [2024-11-09 07:18:59,364 INFO L432 NwaCegarLoop]: 277 mSDtfsCounter, 1151 mSDsluCounter, 1863 mSDsCounter, 0 mSdLazyCounter, 2567 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1156 SdHoareTripleChecker+Valid, 2140 SdHoareTripleChecker+Invalid, 2964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 2567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-09 07:18:59,365 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1156 Valid, 2140 Invalid, 2964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 2567 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-09 07:18:59,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1837 states. [2024-11-09 07:18:59,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1837 to 1474. [2024-11-09 07:18:59,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1166 states have (on average 1.353344768439108) internal successors, (1578), 1172 states have internal predecessors, (1578), 195 states have call successors, (195), 112 states have call predecessors, (195), 111 states have return successors, (248), 191 states have call predecessors, (248), 194 states have call successors, (248) [2024-11-09 07:18:59,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 2021 transitions. [2024-11-09 07:18:59,688 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 2021 transitions. Word has length 104 [2024-11-09 07:18:59,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:18:59,688 INFO L471 AbstractCegarLoop]: Abstraction has 1474 states and 2021 transitions. [2024-11-09 07:18:59,689 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) [2024-11-09 07:18:59,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 2021 transitions. [2024-11-09 07:18:59,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-09 07:18:59,693 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:18:59,693 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] [2024-11-09 07:18:59,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 07:18:59,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:18:59,894 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:18:59,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:18:59,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1818822246, now seen corresponding path program 1 times [2024-11-09 07:18:59,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:18:59,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109455864] [2024-11-09 07:18:59,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:18:59,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:18:59,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:18:59,995 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-09 07:18:59,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:18:59,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109455864] [2024-11-09 07:18:59,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109455864] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:18:59,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:18:59,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 07:18:59,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416513052] [2024-11-09 07:18:59,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:18:59,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:18:59,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:18:59,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:18:59,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:18:59,997 INFO L87 Difference]: Start difference. First operand 1474 states and 2021 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) [2024-11-09 07:19:00,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:19:00,369 INFO L93 Difference]: Finished difference Result 1973 states and 2593 transitions. [2024-11-09 07:19:00,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:19:00,370 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 [2024-11-09 07:19:00,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:19:00,382 INFO L225 Difference]: With dead ends: 1973 [2024-11-09 07:19:00,382 INFO L226 Difference]: Without dead ends: 1464 [2024-11-09 07:19:00,384 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 [2024-11-09 07:19:00,386 INFO L432 NwaCegarLoop]: 329 mSDtfsCounter, 324 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:19:00,386 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 395 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:19:00,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2024-11-09 07:19:00,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1455. [2024-11-09 07:19:00,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1455 states, 1149 states have (on average 1.3455178416013924) internal successors, (1546), 1155 states have internal predecessors, (1546), 194 states have call successors, (194), 111 states have call predecessors, (194), 110 states have return successors, (247), 190 states have call predecessors, (247), 193 states have call successors, (247) [2024-11-09 07:19:00,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1455 states to 1455 states and 1987 transitions. [2024-11-09 07:19:00,657 INFO L78 Accepts]: Start accepts. Automaton has 1455 states and 1987 transitions. Word has length 108 [2024-11-09 07:19:00,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:19:00,658 INFO L471 AbstractCegarLoop]: Abstraction has 1455 states and 1987 transitions. [2024-11-09 07:19:00,658 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) [2024-11-09 07:19:00,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1455 states and 1987 transitions. [2024-11-09 07:19:00,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-09 07:19:00,662 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:19:00,662 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] [2024-11-09 07:19:00,662 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-09 07:19:00,663 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:19:00,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:19:00,663 INFO L85 PathProgramCache]: Analyzing trace with hash 831766994, now seen corresponding path program 1 times [2024-11-09 07:19:00,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:19:00,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908007141] [2024-11-09 07:19:00,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:19:00,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:19:00,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:19:00,905 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-09 07:19:00,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:19:00,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908007141] [2024-11-09 07:19:00,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908007141] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:19:00,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999007288] [2024-11-09 07:19:00,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:19:00,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:19:00,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:19:00,909 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:19:00,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 07:19:01,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:19:01,105 INFO L255 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 07:19:01,112 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:19:01,225 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:19:01,225 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:19:01,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999007288] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:19:01,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:19:01,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2024-11-09 07:19:01,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845330573] [2024-11-09 07:19:01,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:19:01,227 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 07:19:01,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:19:01,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 07:19:01,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-11-09 07:19:01,229 INFO L87 Difference]: Start difference. First operand 1455 states and 1987 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) [2024-11-09 07:19:01,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:19:01,791 INFO L93 Difference]: Finished difference Result 1975 states and 2581 transitions. [2024-11-09 07:19:01,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 07:19:01,792 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 [2024-11-09 07:19:01,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:19:01,802 INFO L225 Difference]: With dead ends: 1975 [2024-11-09 07:19:01,802 INFO L226 Difference]: Without dead ends: 1426 [2024-11-09 07:19:01,808 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 [2024-11-09 07:19:01,809 INFO L432 NwaCegarLoop]: 318 mSDtfsCounter, 44 mSDsluCounter, 1214 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 1532 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 07:19:01,809 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 1532 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 07:19:01,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2024-11-09 07:19:02,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 1366. [2024-11-09 07:19:02,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1088 states have (on average 1.3566176470588236) internal successors, (1476), 1094 states have internal predecessors, (1476), 179 states have call successors, (179), 98 states have call predecessors, (179), 97 states have return successors, (232), 175 states have call predecessors, (232), 178 states have call successors, (232) [2024-11-09 07:19:02,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 1887 transitions. [2024-11-09 07:19:02,128 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 1887 transitions. Word has length 112 [2024-11-09 07:19:02,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:19:02,129 INFO L471 AbstractCegarLoop]: Abstraction has 1366 states and 1887 transitions. [2024-11-09 07:19:02,130 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) [2024-11-09 07:19:02,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 1887 transitions. [2024-11-09 07:19:02,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-09 07:19:02,133 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:19:02,133 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] [2024-11-09 07:19:02,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 07:19:02,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 07:19:02,338 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:19:02,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:19:02,338 INFO L85 PathProgramCache]: Analyzing trace with hash 623542742, now seen corresponding path program 1 times [2024-11-09 07:19:02,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:19:02,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292585792] [2024-11-09 07:19:02,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:19:02,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:19:02,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:19:02,575 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-09 07:19:02,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:19:02,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292585792] [2024-11-09 07:19:02,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292585792] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:19:02,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:19:02,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 07:19:02,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686801266] [2024-11-09 07:19:02,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:19:02,577 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 07:19:02,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:19:02,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 07:19:02,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:19:02,578 INFO L87 Difference]: Start difference. First operand 1366 states and 1887 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) [2024-11-09 07:19:03,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:19:03,135 INFO L93 Difference]: Finished difference Result 2115 states and 2732 transitions. [2024-11-09 07:19:03,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 07:19:03,136 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 [2024-11-09 07:19:03,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:19:03,149 INFO L225 Difference]: With dead ends: 2115 [2024-11-09 07:19:03,149 INFO L226 Difference]: Without dead ends: 1658 [2024-11-09 07:19:03,152 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 [2024-11-09 07:19:03,153 INFO L432 NwaCegarLoop]: 323 mSDtfsCounter, 313 mSDsluCounter, 1029 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 1352 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 07:19:03,153 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 1352 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 07:19:03,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2024-11-09 07:19:03,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 1624. [2024-11-09 07:19:03,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1250 states have (on average 1.3248) internal successors, (1656), 1262 states have internal predecessors, (1656), 227 states have call successors, (227), 140 states have call predecessors, (227), 145 states have return successors, (292), 223 states have call predecessors, (292), 226 states have call successors, (292) [2024-11-09 07:19:03,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 2175 transitions. [2024-11-09 07:19:03,510 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 2175 transitions. Word has length 113 [2024-11-09 07:19:03,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:19:03,511 INFO L471 AbstractCegarLoop]: Abstraction has 1624 states and 2175 transitions. [2024-11-09 07:19:03,511 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) [2024-11-09 07:19:03,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 2175 transitions. [2024-11-09 07:19:03,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-11-09 07:19:03,515 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:19:03,515 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] [2024-11-09 07:19:03,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-09 07:19:03,516 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:19:03,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:19:03,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1423406930, now seen corresponding path program 1 times [2024-11-09 07:19:03,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:19:03,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664668240] [2024-11-09 07:19:03,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:19:03,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:19:03,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:19:05,137 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 07:19:05,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:19:05,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664668240] [2024-11-09 07:19:05,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664668240] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:19:05,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511641131] [2024-11-09 07:19:05,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:19:05,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:19:05,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:19:05,140 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:19:05,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 07:19:05,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:19:05,324 INFO L255 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-09 07:19:05,329 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:19:07,102 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 07:19:07,102 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:19:10,424 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-09 07:19:10,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511641131] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:19:10,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1028772379] [2024-11-09 07:19:10,429 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2024-11-09 07:19:10,429 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:19:10,430 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:19:10,430 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:19:10,430 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:20:04,916 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 240 for LOIs [2024-11-09 07:20:05,254 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 13 for LOIs [2024-11-09 07:20:05,256 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2024-11-09 07:20:05,261 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 204 for LOIs [2024-11-09 07:20:07,137 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 205 for LOIs [2024-11-09 07:20:08,685 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 21 for LOIs [2024-11-09 07:20:08,721 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 198 for LOIs [2024-11-09 07:20:08,981 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 209 for LOIs [2024-11-09 07:20:09,290 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:20:31,270 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '46220#(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 [2024-11-09 07:20:31,270 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:20:31,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:20:31,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 19, 22] total 63 [2024-11-09 07:20:31,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506103441] [2024-11-09 07:20:31,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:20:31,272 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-11-09 07:20:31,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:20:31,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-11-09 07:20:31,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1033, Invalid=11399, Unknown=0, NotChecked=0, Total=12432 [2024-11-09 07:20:31,276 INFO L87 Difference]: Start difference. First operand 1624 states and 2175 transitions. Second operand has 63 states, 40 states have (on average 4.9) internal successors, (196), 45 states have internal predecessors, (196), 25 states have call successors, (44), 19 states have call predecessors, (44), 25 states have return successors, (46), 23 states have call predecessors, (46), 25 states have call successors, (46) [2024-11-09 07:21:07,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:21:07,079 INFO L93 Difference]: Finished difference Result 5359 states and 6789 transitions. [2024-11-09 07:21:07,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 364 states. [2024-11-09 07:21:07,080 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 40 states have (on average 4.9) internal successors, (196), 45 states have internal predecessors, (196), 25 states have call successors, (44), 19 states have call predecessors, (44), 25 states have return successors, (46), 23 states have call predecessors, (46), 25 states have call successors, (46) Word has length 114 [2024-11-09 07:21:07,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:21:07,107 INFO L225 Difference]: With dead ends: 5359 [2024-11-09 07:21:07,107 INFO L226 Difference]: Without dead ends: 4644 [2024-11-09 07:21:07,151 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 296 SyntacticMatches, 7 SemanticMatches, 471 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 93369 ImplicationChecksByTransitivity, 49.3s TimeCoverageRelationStatistics Valid=21001, Invalid=202255, Unknown=0, NotChecked=0, Total=223256 [2024-11-09 07:21:07,152 INFO L432 NwaCegarLoop]: 332 mSDtfsCounter, 7214 mSDsluCounter, 7275 mSDsCounter, 0 mSdLazyCounter, 10982 mSolverCounterSat, 3134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7214 SdHoareTripleChecker+Valid, 7607 SdHoareTripleChecker+Invalid, 14116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3134 IncrementalHoareTripleChecker+Valid, 10982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2024-11-09 07:21:07,152 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7214 Valid, 7607 Invalid, 14116 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3134 Valid, 10982 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2024-11-09 07:21:07,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4644 states. [2024-11-09 07:21:07,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4644 to 2130. [2024-11-09 07:21:07,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2130 states, 1604 states have (on average 1.2861596009975063) internal successors, (2063), 1618 states have internal predecessors, (2063), 299 states have call successors, (299), 198 states have call predecessors, (299), 225 states have return successors, (392), 315 states have call predecessors, (392), 298 states have call successors, (392) [2024-11-09 07:21:07,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2130 states to 2130 states and 2754 transitions. [2024-11-09 07:21:07,842 INFO L78 Accepts]: Start accepts. Automaton has 2130 states and 2754 transitions. Word has length 114 [2024-11-09 07:21:07,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:21:07,842 INFO L471 AbstractCegarLoop]: Abstraction has 2130 states and 2754 transitions. [2024-11-09 07:21:07,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 40 states have (on average 4.9) internal successors, (196), 45 states have internal predecessors, (196), 25 states have call successors, (44), 19 states have call predecessors, (44), 25 states have return successors, (46), 23 states have call predecessors, (46), 25 states have call successors, (46) [2024-11-09 07:21:07,843 INFO L276 IsEmpty]: Start isEmpty. Operand 2130 states and 2754 transitions. [2024-11-09 07:21:07,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-11-09 07:21:07,846 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:21:07,846 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] [2024-11-09 07:21:07,869 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 07:21:08,046 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 07:21:08,047 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:21:08,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:21:08,047 INFO L85 PathProgramCache]: Analyzing trace with hash 113535437, now seen corresponding path program 1 times [2024-11-09 07:21:08,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:21:08,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420733293] [2024-11-09 07:21:08,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:21:08,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:21:08,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:21:08,398 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 07:21:08,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:21:08,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420733293] [2024-11-09 07:21:08,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420733293] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:21:08,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004736325] [2024-11-09 07:21:08,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:21:08,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:21:08,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:21:08,401 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:21:08,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 07:21:08,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:21:08,568 INFO L255 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 07:21:08,573 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:21:08,669 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-09 07:21:08,670 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:21:08,880 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 07:21:08,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004736325] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 07:21:08,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:21:08,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2024-11-09 07:21:08,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564609606] [2024-11-09 07:21:08,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:21:08,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 07:21:08,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:21:08,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 07:21:08,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2024-11-09 07:21:08,882 INFO L87 Difference]: Start difference. First operand 2130 states and 2754 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) [2024-11-09 07:21:10,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:21:10,135 INFO L93 Difference]: Finished difference Result 3714 states and 4608 transitions. [2024-11-09 07:21:10,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 07:21:10,135 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 [2024-11-09 07:21:10,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:21:10,149 INFO L225 Difference]: With dead ends: 3714 [2024-11-09 07:21:10,150 INFO L226 Difference]: Without dead ends: 2493 [2024-11-09 07:21:10,154 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2024-11-09 07:21:10,155 INFO L432 NwaCegarLoop]: 251 mSDtfsCounter, 465 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 07:21:10,155 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 872 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 984 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 07:21:10,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2024-11-09 07:21:10,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 2172. [2024-11-09 07:21:10,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2172 states, 1625 states have (on average 1.2849230769230768) internal successors, (2088), 1639 states have internal predecessors, (2088), 314 states have call successors, (314), 203 states have call predecessors, (314), 231 states have return successors, (420), 331 states have call predecessors, (420), 313 states have call successors, (420) [2024-11-09 07:21:10,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2172 states to 2172 states and 2822 transitions. [2024-11-09 07:21:10,679 INFO L78 Accepts]: Start accepts. Automaton has 2172 states and 2822 transitions. Word has length 115 [2024-11-09 07:21:10,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:21:10,680 INFO L471 AbstractCegarLoop]: Abstraction has 2172 states and 2822 transitions. [2024-11-09 07:21:10,680 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) [2024-11-09 07:21:10,681 INFO L276 IsEmpty]: Start isEmpty. Operand 2172 states and 2822 transitions. [2024-11-09 07:21:10,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-09 07:21:10,684 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:21:10,684 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] [2024-11-09 07:21:10,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 07:21:10,889 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 07:21:10,889 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:21:10,890 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:21:10,890 INFO L85 PathProgramCache]: Analyzing trace with hash 744006302, now seen corresponding path program 1 times [2024-11-09 07:21:10,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:21:10,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528134076] [2024-11-09 07:21:10,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:21:10,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:21:10,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:21:11,742 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-09 07:21:11,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:21:11,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528134076] [2024-11-09 07:21:11,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528134076] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:21:11,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680921993] [2024-11-09 07:21:11,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:21:11,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:21:11,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:21:11,746 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:21:11,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 07:21:11,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:21:11,934 INFO L255 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-09 07:21:11,938 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:21:12,987 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 07:21:12,987 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:21:14,623 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-09 07:21:14,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680921993] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:21:14,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2023446131] [2024-11-09 07:21:14,626 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2024-11-09 07:21:14,626 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:21:14,627 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:21:14,627 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:21:14,627 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:21:40,142 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 241 for LOIs [2024-11-09 07:21:40,507 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 77 for LOIs [2024-11-09 07:21:40,559 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2024-11-09 07:21:40,562 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 205 for LOIs [2024-11-09 07:21:41,937 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 206 for LOIs [2024-11-09 07:21:43,512 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 21 for LOIs [2024-11-09 07:21:43,545 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 199 for LOIs [2024-11-09 07:21:43,818 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 210 for LOIs [2024-11-09 07:21:44,154 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:22:04,642 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '67728#(and (= ~q_req_up~0 1) (= ~q_free~0 1) (= ~c_dr_pc~0 1) (not (= ~c_num_read~0 ~p_num_write~0)) (exists ((v_~q_free~0_105 Int) (v_~q_req_up~0_104 Int)) (and (or (exists ((v_~p_dw_st~0_141 Int) (v_~p_dw_pc~0_49 Int)) (and (or (and (= v_~p_dw_pc~0_49 0) (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))))) (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_49 1))) (or (and (= v_~p_dw_pc~0_49 0) (= v_~p_dw_st~0_141 1)) (and (<= ~q_buf_0~0 2147483647) (= v_~q_req_up~0_104 1) (<= 0 (+ ~p_last_write~0 2147483648)) (= v_~p_dw_st~0_141 1))))) (= ~p_dw_st~0 0)) (or (and (<= 0 ~p_dw_pc~0) (<= v_~q_free~0_105 1) (= ~p_dw_st~0 0)) (and (= v_~q_free~0_105 0) (= ~p_dw_pc~0 1) (= 2 ~p_dw_st~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 [2024-11-09 07:22:04,642 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:22:04,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:22:04,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 18] total 49 [2024-11-09 07:22:04,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163663341] [2024-11-09 07:22:04,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:22:04,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-09 07:22:04,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:22:04,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-09 07:22:04,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=923, Invalid=9379, Unknown=0, NotChecked=0, Total=10302 [2024-11-09 07:22:04,648 INFO L87 Difference]: Start difference. First operand 2172 states and 2822 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) [2024-11-09 07:22:14,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:22:14,210 INFO L93 Difference]: Finished difference Result 4766 states and 5856 transitions. [2024-11-09 07:22:14,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2024-11-09 07:22:14,211 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 [2024-11-09 07:22:14,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:22:14,229 INFO L225 Difference]: With dead ends: 4766 [2024-11-09 07:22:14,230 INFO L226 Difference]: Without dead ends: 3503 [2024-11-09 07:22:14,240 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 323 SyntacticMatches, 2 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 15908 ImplicationChecksByTransitivity, 25.2s TimeCoverageRelationStatistics Valid=4266, Invalid=36740, Unknown=0, NotChecked=0, Total=41006 [2024-11-09 07:22:14,241 INFO L432 NwaCegarLoop]: 251 mSDtfsCounter, 5793 mSDsluCounter, 3141 mSDsCounter, 0 mSdLazyCounter, 5694 mSolverCounterSat, 2671 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5793 SdHoareTripleChecker+Valid, 3392 SdHoareTripleChecker+Invalid, 8365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2671 IncrementalHoareTripleChecker+Valid, 5694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-11-09 07:22:14,242 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5793 Valid, 3392 Invalid, 8365 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2671 Valid, 5694 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2024-11-09 07:22:14,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3503 states. [2024-11-09 07:22:14,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3503 to 1963. [2024-11-09 07:22:14,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1496 states have (on average 1.2974598930481283) internal successors, (1941), 1512 states have internal predecessors, (1941), 269 states have call successors, (269), 168 states have call predecessors, (269), 196 states have return successors, (364), 284 states have call predecessors, (364), 268 states have call successors, (364) [2024-11-09 07:22:14,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 2574 transitions. [2024-11-09 07:22:14,847 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 2574 transitions. Word has length 124 [2024-11-09 07:22:14,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:22:14,847 INFO L471 AbstractCegarLoop]: Abstraction has 1963 states and 2574 transitions. [2024-11-09 07:22:14,848 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) [2024-11-09 07:22:14,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 2574 transitions. [2024-11-09 07:22:14,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-09 07:22:14,852 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:22:14,852 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] [2024-11-09 07:22:14,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 07:22:15,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 07:22:15,056 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:22:15,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:22:15,057 INFO L85 PathProgramCache]: Analyzing trace with hash 2061969197, now seen corresponding path program 1 times [2024-11-09 07:22:15,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:22:15,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844236280] [2024-11-09 07:22:15,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:22:15,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:22:15,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:22:15,371 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-09 07:22:15,372 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:22:15,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844236280] [2024-11-09 07:22:15,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844236280] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:22:15,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973539815] [2024-11-09 07:22:15,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:22:15,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:22:15,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:22:15,374 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:22:15,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 07:22:15,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:22:15,538 INFO L255 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 07:22:15,541 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:22:15,657 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 07:22:15,657 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:22:15,863 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 07:22:15,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973539815] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 07:22:15,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:22:15,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2024-11-09 07:22:15,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864716221] [2024-11-09 07:22:15,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:22:15,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 07:22:15,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:22:15,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 07:22:15,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-09 07:22:15,866 INFO L87 Difference]: Start difference. First operand 1963 states and 2574 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) [2024-11-09 07:22:17,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:22:17,157 INFO L93 Difference]: Finished difference Result 2754 states and 3473 transitions. [2024-11-09 07:22:17,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 07:22:17,158 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 [2024-11-09 07:22:17,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:22:17,166 INFO L225 Difference]: With dead ends: 2754 [2024-11-09 07:22:17,166 INFO L226 Difference]: Without dead ends: 1700 [2024-11-09 07:22:17,169 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 [2024-11-09 07:22:17,170 INFO L432 NwaCegarLoop]: 240 mSDtfsCounter, 684 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 1199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 07:22:17,171 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [685 Valid, 840 Invalid, 1199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 07:22:17,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1700 states. [2024-11-09 07:22:17,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1700 to 1644. [2024-11-09 07:22:17,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1644 states, 1253 states have (on average 1.3112529928172387) internal successors, (1643), 1269 states have internal predecessors, (1643), 230 states have call successors, (230), 135 states have call predecessors, (230), 159 states have return successors, (320), 241 states have call predecessors, (320), 229 states have call successors, (320) [2024-11-09 07:22:17,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 2193 transitions. [2024-11-09 07:22:17,550 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 2193 transitions. Word has length 125 [2024-11-09 07:22:17,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:22:17,551 INFO L471 AbstractCegarLoop]: Abstraction has 1644 states and 2193 transitions. [2024-11-09 07:22:17,552 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) [2024-11-09 07:22:17,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 2193 transitions. [2024-11-09 07:22:17,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 07:22:17,555 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:22:17,556 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:22:17,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-09 07:22:17,760 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 07:22:17,760 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:22:17,761 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:22:17,761 INFO L85 PathProgramCache]: Analyzing trace with hash 502357385, now seen corresponding path program 1 times [2024-11-09 07:22:17,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:22:17,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812618082] [2024-11-09 07:22:17,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:22:17,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:22:17,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:22:17,960 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 07:22:17,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:22:17,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812618082] [2024-11-09 07:22:17,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812618082] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:22:17,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801178550] [2024-11-09 07:22:17,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:22:17,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:22:17,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:22:17,963 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:22:17,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 07:22:18,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:22:18,187 INFO L255 TraceCheckSpWp]: Trace formula consists of 808 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 07:22:18,190 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:22:18,253 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 07:22:18,254 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:22:18,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801178550] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:22:18,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:22:18,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 07:22:18,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213442187] [2024-11-09 07:22:18,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:22:18,255 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:22:18,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:22:18,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:22:18,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:22:18,256 INFO L87 Difference]: Start difference. First operand 1644 states and 2193 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) [2024-11-09 07:22:18,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:22:18,927 INFO L93 Difference]: Finished difference Result 3252 states and 4793 transitions. [2024-11-09 07:22:18,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:22:18,928 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 123 [2024-11-09 07:22:18,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:22:18,941 INFO L225 Difference]: With dead ends: 3252 [2024-11-09 07:22:18,941 INFO L226 Difference]: Without dead ends: 2440 [2024-11-09 07:22:18,945 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:22:18,946 INFO L432 NwaCegarLoop]: 289 mSDtfsCounter, 299 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:22:18,947 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 496 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:22:18,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2024-11-09 07:22:19,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 2433. [2024-11-09 07:22:19,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2433 states, 1920 states have (on average 1.3651041666666666) internal successors, (2621), 1939 states have internal predecessors, (2621), 322 states have call successors, (322), 165 states have call predecessors, (322), 189 states have return successors, (462), 330 states have call predecessors, (462), 321 states have call successors, (462) [2024-11-09 07:22:19,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 3405 transitions. [2024-11-09 07:22:19,576 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 3405 transitions. Word has length 123 [2024-11-09 07:22:19,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:22:19,578 INFO L471 AbstractCegarLoop]: Abstraction has 2433 states and 3405 transitions. [2024-11-09 07:22:19,578 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) [2024-11-09 07:22:19,578 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 3405 transitions. [2024-11-09 07:22:19,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 07:22:19,584 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:22:19,584 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:22:19,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 07:22:19,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:22:19,785 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:22:19,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:22:19,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1041025001, now seen corresponding path program 1 times [2024-11-09 07:22:19,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:22:19,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940092910] [2024-11-09 07:22:19,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:22:19,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:22:19,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:22:19,925 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 07:22:19,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:22:19,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940092910] [2024-11-09 07:22:19,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940092910] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:22:19,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622429678] [2024-11-09 07:22:19,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:22:19,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:22:19,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:22:19,929 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:22:19,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 07:22:20,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:22:20,147 INFO L255 TraceCheckSpWp]: Trace formula consists of 802 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 07:22:20,150 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:22:20,181 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-09 07:22:20,181 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:22:20,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622429678] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:22:20,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:22:20,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 07:22:20,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914336035] [2024-11-09 07:22:20,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:22:20,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:22:20,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:22:20,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:22:20,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:22:20,184 INFO L87 Difference]: Start difference. First operand 2433 states and 3405 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 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) [2024-11-09 07:22:20,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:22:20,937 INFO L93 Difference]: Finished difference Result 5604 states and 8503 transitions. [2024-11-09 07:22:20,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:22:20,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 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 123 [2024-11-09 07:22:20,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:22:21,037 INFO L225 Difference]: With dead ends: 5604 [2024-11-09 07:22:21,038 INFO L226 Difference]: Without dead ends: 4003 [2024-11-09 07:22:21,045 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:22:21,047 INFO L432 NwaCegarLoop]: 289 mSDtfsCounter, 317 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:22:21,048 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 496 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:22:21,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4003 states. [2024-11-09 07:22:21,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4003 to 3991. [2024-11-09 07:22:21,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3991 states, 3239 states have (on average 1.4038283420808892) internal successors, (4547), 3264 states have internal predecessors, (4547), 501 states have call successors, (501), 225 states have call predecessors, (501), 249 states have return successors, (737), 503 states have call predecessors, (737), 500 states have call successors, (737) [2024-11-09 07:22:21,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3991 states to 3991 states and 5785 transitions. [2024-11-09 07:22:21,613 INFO L78 Accepts]: Start accepts. Automaton has 3991 states and 5785 transitions. Word has length 123 [2024-11-09 07:22:21,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:22:21,614 INFO L471 AbstractCegarLoop]: Abstraction has 3991 states and 5785 transitions. [2024-11-09 07:22:21,614 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 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) [2024-11-09 07:22:21,614 INFO L276 IsEmpty]: Start isEmpty. Operand 3991 states and 5785 transitions. [2024-11-09 07:22:21,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 07:22:21,621 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:22:21,621 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:22:21,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 07:22:21,821 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2024-11-09 07:22:21,822 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:22:21,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:22:21,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1506171465, now seen corresponding path program 1 times [2024-11-09 07:22:21,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:22:21,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593106350] [2024-11-09 07:22:21,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:22:21,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:22:21,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:22:21,965 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 07:22:21,965 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:22:21,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593106350] [2024-11-09 07:22:21,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593106350] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:22:21,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533537658] [2024-11-09 07:22:21,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:22:21,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:22:21,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:22:21,968 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:22:21,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 07:22:22,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:22:22,204 INFO L255 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 07:22:22,207 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:22:22,248 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 07:22:22,248 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:22:22,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533537658] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:22:22,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:22:22,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 07:22:22,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943935044] [2024-11-09 07:22:22,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:22:22,249 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:22:22,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:22:22,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:22:22,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:22:22,250 INFO L87 Difference]: Start difference. First operand 3991 states and 5785 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (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) [2024-11-09 07:22:23,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:22:23,223 INFO L93 Difference]: Finished difference Result 10248 states and 15782 transitions. [2024-11-09 07:22:23,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:22:23,223 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (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 123 [2024-11-09 07:22:23,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:22:23,259 INFO L225 Difference]: With dead ends: 10248 [2024-11-09 07:22:23,259 INFO L226 Difference]: Without dead ends: 7089 [2024-11-09 07:22:23,277 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:22:23,278 INFO L432 NwaCegarLoop]: 289 mSDtfsCounter, 320 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:22:23,278 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 496 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:22:23,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7089 states. [2024-11-09 07:22:24,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7089 to 7067. [2024-11-09 07:22:24,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7067 states, 5847 states have (on average 1.4262014708397468) internal successors, (8339), 5884 states have internal predecessors, (8339), 849 states have call successors, (849), 345 states have call predecessors, (849), 369 states have return successors, (1269), 839 states have call predecessors, (1269), 848 states have call successors, (1269) [2024-11-09 07:22:24,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7067 states to 7067 states and 10457 transitions. [2024-11-09 07:22:24,391 INFO L78 Accepts]: Start accepts. Automaton has 7067 states and 10457 transitions. Word has length 123 [2024-11-09 07:22:24,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:22:24,391 INFO L471 AbstractCegarLoop]: Abstraction has 7067 states and 10457 transitions. [2024-11-09 07:22:24,391 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (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) [2024-11-09 07:22:24,392 INFO L276 IsEmpty]: Start isEmpty. Operand 7067 states and 10457 transitions. [2024-11-09 07:22:24,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 07:22:24,400 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:22:24,401 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:22:24,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 07:22:24,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-09 07:22:24,602 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:22:24,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:22:24,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1174983703, now seen corresponding path program 1 times [2024-11-09 07:22:24,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:22:24,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748118803] [2024-11-09 07:22:24,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:22:24,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:22:24,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:22:24,727 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 07:22:24,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:22:24,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748118803] [2024-11-09 07:22:24,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748118803] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:22:24,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841863564] [2024-11-09 07:22:24,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:22:24,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:22:24,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:22:24,730 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:22:24,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 07:22:24,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:22:24,948 INFO L255 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 07:22:24,951 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:22:25,063 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 07:22:25,064 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:22:25,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841863564] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:22:25,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:22:25,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 07:22:25,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610937802] [2024-11-09 07:22:25,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:22:25,065 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:22:25,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:22:25,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:22:25,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:22:25,066 INFO L87 Difference]: Start difference. First operand 7067 states and 10457 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) [2024-11-09 07:22:26,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:22:26,974 INFO L93 Difference]: Finished difference Result 19416 states and 30058 transitions. [2024-11-09 07:22:26,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:22:26,977 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 123 [2024-11-09 07:22:26,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:22:27,066 INFO L225 Difference]: With dead ends: 19416 [2024-11-09 07:22:27,066 INFO L226 Difference]: Without dead ends: 13181 [2024-11-09 07:22:27,095 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:22:27,096 INFO L432 NwaCegarLoop]: 289 mSDtfsCounter, 305 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:22:27,096 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 496 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 07:22:27,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13181 states. [2024-11-09 07:22:28,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13181 to 13139. [2024-11-09 07:22:28,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13139 states, 11003 states have (on average 1.4362446605471235) internal successors, (15803), 11064 states have internal predecessors, (15803), 1525 states have call successors, (1525), 585 states have call predecessors, (1525), 609 states have return successors, (2297), 1491 states have call predecessors, (2297), 1524 states have call successors, (2297) [2024-11-09 07:22:28,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13139 states to 13139 states and 19625 transitions. [2024-11-09 07:22:28,518 INFO L78 Accepts]: Start accepts. Automaton has 13139 states and 19625 transitions. Word has length 123 [2024-11-09 07:22:28,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:22:28,519 INFO L471 AbstractCegarLoop]: Abstraction has 13139 states and 19625 transitions. [2024-11-09 07:22:28,519 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) [2024-11-09 07:22:28,519 INFO L276 IsEmpty]: Start isEmpty. Operand 13139 states and 19625 transitions. [2024-11-09 07:22:28,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 07:22:28,532 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:22:28,533 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:22:28,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-09 07:22:28,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-09 07:22:28,734 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:22:28,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:22:28,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1152470601, now seen corresponding path program 1 times [2024-11-09 07:22:28,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:22:28,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366457347] [2024-11-09 07:22:28,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:22:28,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:22:28,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:22:28,860 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 07:22:28,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:22:28,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366457347] [2024-11-09 07:22:28,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366457347] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:22:28,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282399275] [2024-11-09 07:22:28,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:22:28,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:22:28,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:22:28,863 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:22:28,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 07:22:29,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:22:29,075 INFO L255 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 07:22:29,078 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:22:29,124 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 07:22:29,125 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:22:29,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282399275] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:22:29,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:22:29,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 07:22:29,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482261667] [2024-11-09 07:22:29,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:22:29,126 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:22:29,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:22:29,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:22:29,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:22:29,129 INFO L87 Difference]: Start difference. First operand 13139 states and 19625 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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) [2024-11-09 07:22:31,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:22:31,857 INFO L93 Difference]: Finished difference Result 37512 states and 58046 transitions. [2024-11-09 07:22:31,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:22:31,857 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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 123 [2024-11-09 07:22:31,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:22:31,970 INFO L225 Difference]: With dead ends: 37512 [2024-11-09 07:22:31,970 INFO L226 Difference]: Without dead ends: 25205 [2024-11-09 07:22:32,009 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:22:32,010 INFO L432 NwaCegarLoop]: 289 mSDtfsCounter, 311 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:22:32,010 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 496 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:22:32,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25205 states. [2024-11-09 07:22:34,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25205 to 25123. [2024-11-09 07:22:34,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25123 states, 21195 states have (on average 1.4385940080207595) internal successors, (30491), 21304 states have internal predecessors, (30491), 2837 states have call successors, (2837), 1065 states have call predecessors, (2837), 1089 states have return successors, (4281), 2755 states have call predecessors, (4281), 2836 states have call successors, (4281) [2024-11-09 07:22:34,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25123 states to 25123 states and 37609 transitions. [2024-11-09 07:22:34,739 INFO L78 Accepts]: Start accepts. Automaton has 25123 states and 37609 transitions. Word has length 123 [2024-11-09 07:22:34,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:22:34,740 INFO L471 AbstractCegarLoop]: Abstraction has 25123 states and 37609 transitions. [2024-11-09 07:22:34,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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) [2024-11-09 07:22:34,740 INFO L276 IsEmpty]: Start isEmpty. Operand 25123 states and 37609 transitions. [2024-11-09 07:22:34,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 07:22:34,771 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:22:34,771 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:22:34,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-09 07:22:34,972 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbfbd13-000a-438c-ab1b-ec5546800f30/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-09 07:22:34,973 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:22:34,973 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:22:34,973 INFO L85 PathProgramCache]: Analyzing trace with hash -970970967, now seen corresponding path program 1 times [2024-11-09 07:22:34,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:22:34,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964035373] [2024-11-09 07:22:34,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:22:34,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:22:35,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:22:35,336 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-09 07:22:35,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:22:35,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964035373] [2024-11-09 07:22:35,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964035373] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:22:35,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:22:35,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 07:22:35,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92373263] [2024-11-09 07:22:35,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:22:35,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 07:22:35,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:22:35,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 07:22:35,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:22:35,339 INFO L87 Difference]: Start difference. First operand 25123 states and 37609 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-09 07:22:40,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:22:40,337 INFO L93 Difference]: Finished difference Result 66055 states and 100411 transitions. [2024-11-09 07:22:40,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 07:22:40,338 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 123 [2024-11-09 07:22:40,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:22:40,547 INFO L225 Difference]: With dead ends: 66055 [2024-11-09 07:22:40,547 INFO L226 Difference]: Without dead ends: 41765 [2024-11-09 07:22:40,620 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2024-11-09 07:22:40,621 INFO L432 NwaCegarLoop]: 288 mSDtfsCounter, 776 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 1019 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 07:22:40,621 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [793 Valid, 1019 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 07:22:40,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41765 states. [2024-11-09 07:22:46,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41765 to 39299. [2024-11-09 07:22:46,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39299 states, 33211 states have (on average 1.435518352353136) internal successors, (47675), 33384 states have internal predecessors, (47675), 4421 states have call successors, (4421), 1641 states have call predecessors, (4421), 1665 states have return successors, (6873), 4275 states have call predecessors, (6873), 4420 states have call successors, (6873) [2024-11-09 07:22:46,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39299 states to 39299 states and 58969 transitions. [2024-11-09 07:22:46,373 INFO L78 Accepts]: Start accepts. Automaton has 39299 states and 58969 transitions. Word has length 123 [2024-11-09 07:22:46,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:22:46,374 INFO L471 AbstractCegarLoop]: Abstraction has 39299 states and 58969 transitions. [2024-11-09 07:22:46,374 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-09 07:22:46,374 INFO L276 IsEmpty]: Start isEmpty. Operand 39299 states and 58969 transitions. [2024-11-09 07:22:46,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-09 07:22:46,413 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:22:46,413 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:22:46,413 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-09 07:22:46,413 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:22:46,414 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:22:46,414 INFO L85 PathProgramCache]: Analyzing trace with hash 541159821, now seen corresponding path program 1 times [2024-11-09 07:22:46,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:22:46,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029335824] [2024-11-09 07:22:46,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:22:46,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:22:46,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:22:46,747 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-09 07:22:46,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:22:46,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029335824] [2024-11-09 07:22:46,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029335824] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:22:46,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:22:46,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 07:22:46,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865343974] [2024-11-09 07:22:46,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:22:46,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 07:22:46,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:22:46,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 07:22:46,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:22:46,749 INFO L87 Difference]: Start difference. First operand 39299 states and 58969 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-09 07:22:58,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:22:58,127 INFO L93 Difference]: Finished difference Result 123527 states and 188555 transitions. [2024-11-09 07:22:58,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 07:22:58,128 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 125 [2024-11-09 07:22:58,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:22:58,597 INFO L225 Difference]: With dead ends: 123527 [2024-11-09 07:22:58,597 INFO L226 Difference]: Without dead ends: 85061 [2024-11-09 07:22:58,710 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2024-11-09 07:22:58,711 INFO L432 NwaCegarLoop]: 267 mSDtfsCounter, 831 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 07:22:58,711 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [860 Valid, 757 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 07:22:58,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85061 states.