./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.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_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/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_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/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_c5fca8be-0389-4a8b-96d3-0d660e4f4069/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 dfe43dac9acec5d21450031b4b25696c02a17019cbc94a74a969e06371e0741b --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 07:17:28,613 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 07:17:28,732 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 07:17:28,742 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 07:17:28,744 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 07:17:28,786 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 07:17:28,789 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 07:17:28,790 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 07:17:28,791 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 07:17:28,792 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 07:17:28,794 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 07:17:28,794 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 07:17:28,795 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 07:17:28,795 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 07:17:28,799 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 07:17:28,799 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 07:17:28,800 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 07:17:28,800 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 07:17:28,801 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 07:17:28,801 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 07:17:28,802 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 07:17:28,816 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 07:17:28,818 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 07:17:28,818 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 07:17:28,819 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 07:17:28,819 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 07:17:28,819 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 07:17:28,820 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 07:17:28,820 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 07:17:28,821 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 07:17:28,821 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 07:17:28,821 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 07:17:28,822 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 07:17:28,822 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 07:17:28,822 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 07:17:28,823 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 07:17:28,823 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 07:17:28,825 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 07:17:28,826 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 07:17:28,826 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 07:17:28,827 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 07:17:28,827 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 07:17:28,828 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 07:17:28,828 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 07:17:28,829 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 07:17:28,829 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 07:17:28,830 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 07:17:28,830 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_c5fca8be-0389-4a8b-96d3-0d660e4f4069/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfe43dac9acec5d21450031b4b25696c02a17019cbc94a74a969e06371e0741b [2024-11-09 07:17:29,140 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 07:17:29,179 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 07:17:29,182 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 07:17:29,185 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 07:17:29,186 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 07:17:29,188 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c Unable to find full path for "g++" [2024-11-09 07:17:31,594 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 07:17:31,867 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 07:17:31,868 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c [2024-11-09 07:17:31,889 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/data/c5966aeca/a56ed9ff07984a70a856e3e0f021e37b/FLAGf3ac20d89 [2024-11-09 07:17:31,914 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/data/c5966aeca/a56ed9ff07984a70a856e3e0f021e37b [2024-11-09 07:17:31,917 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 07:17:31,919 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 07:17:31,921 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 07:17:31,922 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 07:17:31,933 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 07:17:31,934 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:17:31" (1/1) ... [2024-11-09 07:17:31,935 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3aa22718 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:17:31, skipping insertion in model container [2024-11-09 07:17:31,936 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:17:31" (1/1) ... [2024-11-09 07:17:32,013 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 07:17:32,245 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_c5fca8be-0389-4a8b-96d3-0d660e4f4069/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c[914,927] [2024-11-09 07:17:32,358 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c[7115,7128] [2024-11-09 07:17:32,563 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:17:32,585 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 07:17:32,602 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_c5fca8be-0389-4a8b-96d3-0d660e4f4069/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c[914,927] [2024-11-09 07:17:32,625 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_c5fca8be-0389-4a8b-96d3-0d660e4f4069/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c[7115,7128] [2024-11-09 07:17:32,705 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:17:32,755 INFO L204 MainTranslator]: Completed translation [2024-11-09 07:17:32,756 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:17:32 WrapperNode [2024-11-09 07:17:32,756 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 07:17:32,758 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 07:17:32,758 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 07:17:32,758 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 07:17:32,769 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:17:32" (1/1) ... [2024-11-09 07:17:32,796 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:17:32" (1/1) ... [2024-11-09 07:17:32,886 INFO L138 Inliner]: procedures = 69, calls = 82, calls flagged for inlining = 37, calls inlined = 37, statements flattened = 819 [2024-11-09 07:17:32,886 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 07:17:32,887 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 07:17:32,888 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 07:17:32,888 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 07:17:32,901 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:17:32" (1/1) ... [2024-11-09 07:17:32,902 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:17:32" (1/1) ... [2024-11-09 07:17:32,907 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:17:32" (1/1) ... [2024-11-09 07:17:32,907 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:17:32" (1/1) ... [2024-11-09 07:17:32,929 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:17:32" (1/1) ... [2024-11-09 07:17:32,942 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:17:32" (1/1) ... [2024-11-09 07:17:32,950 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:17:32" (1/1) ... [2024-11-09 07:17:32,957 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:17:32" (1/1) ... [2024-11-09 07:17:32,972 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 07:17:32,973 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 07:17:32,975 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 07:17:32,977 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 07:17:32,978 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:17:32" (1/1) ... [2024-11-09 07:17:32,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 07:17:33,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:17:33,029 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 07:17:33,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 07:17:33,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 07:17:33,081 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-09 07:17:33,081 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-09 07:17:33,082 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2024-11-09 07:17:33,082 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2024-11-09 07:17:33,082 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2024-11-09 07:17:33,082 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2024-11-09 07:17:33,082 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2024-11-09 07:17:33,083 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2024-11-09 07:17:33,083 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2024-11-09 07:17:33,083 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2024-11-09 07:17:33,083 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2024-11-09 07:17:33,083 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2024-11-09 07:17:33,084 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2024-11-09 07:17:33,084 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2024-11-09 07:17:33,084 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2024-11-09 07:17:33,084 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2024-11-09 07:17:33,086 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2024-11-09 07:17:33,087 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2024-11-09 07:17:33,087 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2024-11-09 07:17:33,088 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2024-11-09 07:17:33,089 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2024-11-09 07:17:33,089 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2024-11-09 07:17:33,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 07:17:33,090 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2024-11-09 07:17:33,092 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2024-11-09 07:17:33,093 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2024-11-09 07:17:33,093 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2024-11-09 07:17:33,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 07:17:33,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 07:17:33,094 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2024-11-09 07:17:33,094 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2024-11-09 07:17:33,094 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2024-11-09 07:17:33,094 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2024-11-09 07:17:33,326 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 07:17:33,331 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 07:17:34,574 INFO L? ?]: Removed 107 outVars from TransFormulas that were not future-live. [2024-11-09 07:17:34,575 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 07:17:35,239 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 07:17:35,239 INFO L316 CfgBuilder]: Removed 15 assume(true) statements. [2024-11-09 07:17:35,239 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:17:35 BoogieIcfgContainer [2024-11-09 07:17:35,240 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 07:17:35,242 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 07:17:35,243 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 07:17:35,246 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 07:17:35,247 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 07:17:31" (1/3) ... [2024-11-09 07:17:35,248 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d636da7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:17:35, skipping insertion in model container [2024-11-09 07:17:35,248 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:17:32" (2/3) ... [2024-11-09 07:17:35,249 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d636da7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:17:35, skipping insertion in model container [2024-11-09 07:17:35,250 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:17:35" (3/3) ... [2024-11-09 07:17:35,251 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.08.cil-2.c [2024-11-09 07:17:35,270 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 07:17:35,270 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-09 07:17:35,346 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 07:17:35,352 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;@2e35687a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 07:17:35,352 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-09 07:17:35,358 INFO L276 IsEmpty]: Start isEmpty. Operand has 231 states, 175 states have (on average 1.5085714285714287) internal successors, (264), 183 states have internal predecessors, (264), 38 states have call successors, (38), 15 states have call predecessors, (38), 15 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) [2024-11-09 07:17:35,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-09 07:17:35,368 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:17:35,369 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 07:17:35,370 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:17:35,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:17:35,376 INFO L85 PathProgramCache]: Analyzing trace with hash 2133926091, now seen corresponding path program 1 times [2024-11-09 07:17:35,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:17:35,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417667370] [2024-11-09 07:17:35,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:17:35,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:17:35,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:17:35,991 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 07:17:35,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:17:35,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417667370] [2024-11-09 07:17:35,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417667370] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:17:35,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:17:35,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 07:17:35,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777835882] [2024-11-09 07:17:36,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:17:36,007 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 07:17:36,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:17:36,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 07:17:36,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 07:17:36,047 INFO L87 Difference]: Start difference. First operand has 231 states, 175 states have (on average 1.5085714285714287) internal successors, (264), 183 states have internal predecessors, (264), 38 states have call successors, (38), 15 states have call predecessors, (38), 15 states have return successors, (38), 36 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 07:17:36,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:17:36,757 INFO L93 Difference]: Finished difference Result 512 states and 751 transitions. [2024-11-09 07:17:36,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 07:17:36,763 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 07:17:36,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:17:36,782 INFO L225 Difference]: With dead ends: 512 [2024-11-09 07:17:36,783 INFO L226 Difference]: Without dead ends: 285 [2024-11-09 07:17:36,789 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 07:17:36,793 INFO L432 NwaCegarLoop]: 329 mSDtfsCounter, 386 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 07:17:36,794 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 566 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 07:17:36,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2024-11-09 07:17:36,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 278. [2024-11-09 07:17:36,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 210 states have (on average 1.4142857142857144) internal successors, (297), 215 states have internal predecessors, (297), 46 states have call successors, (46), 22 states have call predecessors, (46), 20 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2024-11-09 07:17:36,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 385 transitions. [2024-11-09 07:17:36,917 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 385 transitions. Word has length 45 [2024-11-09 07:17:36,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:17:36,918 INFO L471 AbstractCegarLoop]: Abstraction has 278 states and 385 transitions. [2024-11-09 07:17:36,919 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 07:17:36,919 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 385 transitions. [2024-11-09 07:17:36,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-09 07:17:36,922 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:17:36,922 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 07:17:36,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 07:17:36,923 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:17:36,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:17:36,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1242066582, now seen corresponding path program 1 times [2024-11-09 07:17:36,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:17:36,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400879851] [2024-11-09 07:17:36,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:17:36,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:17:36,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:17:37,167 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 07:17:37,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:17:37,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400879851] [2024-11-09 07:17:37,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400879851] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:17:37,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:17:37,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 07:17:37,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257042352] [2024-11-09 07:17:37,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:17:37,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 07:17:37,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:17:37,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 07:17:37,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:17:37,173 INFO L87 Difference]: Start difference. First operand 278 states and 385 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-09 07:17:38,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:17:38,247 INFO L93 Difference]: Finished difference Result 680 states and 888 transitions. [2024-11-09 07:17:38,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 07:17:38,248 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2024-11-09 07:17:38,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:17:38,256 INFO L225 Difference]: With dead ends: 680 [2024-11-09 07:17:38,260 INFO L226 Difference]: Without dead ends: 548 [2024-11-09 07:17:38,262 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-09 07:17:38,263 INFO L432 NwaCegarLoop]: 385 mSDtfsCounter, 810 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 07:17:38,267 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [814 Valid, 977 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 07:17:38,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2024-11-09 07:17:38,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 464. [2024-11-09 07:17:38,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 342 states have (on average 1.3362573099415205) internal successors, (457), 348 states have internal predecessors, (457), 73 states have call successors, (73), 45 states have call predecessors, (73), 47 states have return successors, (73), 72 states have call predecessors, (73), 69 states have call successors, (73) [2024-11-09 07:17:38,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 603 transitions. [2024-11-09 07:17:38,368 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 603 transitions. Word has length 45 [2024-11-09 07:17:38,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:17:38,369 INFO L471 AbstractCegarLoop]: Abstraction has 464 states and 603 transitions. [2024-11-09 07:17:38,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-09 07:17:38,370 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 603 transitions. [2024-11-09 07:17:38,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-09 07:17:38,373 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:17:38,374 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 07:17:38,374 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 07:17:38,374 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:17:38,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:17:38,376 INFO L85 PathProgramCache]: Analyzing trace with hash -555080106, now seen corresponding path program 1 times [2024-11-09 07:17:38,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:17:38,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547602243] [2024-11-09 07:17:38,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:17:38,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:17:38,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:17:38,727 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 07:17:38,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:17:38,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547602243] [2024-11-09 07:17:38,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547602243] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:17:38,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:17:38,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-09 07:17:38,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621876377] [2024-11-09 07:17:38,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:17:38,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 07:17:38,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:17:38,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 07:17:38,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-09 07:17:38,733 INFO L87 Difference]: Start difference. First operand 464 states and 603 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-09 07:17:39,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:17:39,937 INFO L93 Difference]: Finished difference Result 980 states and 1219 transitions. [2024-11-09 07:17:39,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 07:17:39,938 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2024-11-09 07:17:39,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:17:39,946 INFO L225 Difference]: With dead ends: 980 [2024-11-09 07:17:39,947 INFO L226 Difference]: Without dead ends: 678 [2024-11-09 07:17:39,948 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2024-11-09 07:17:39,950 INFO L432 NwaCegarLoop]: 185 mSDtfsCounter, 458 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 07:17:39,951 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 849 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 07:17:39,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2024-11-09 07:17:40,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 643. [2024-11-09 07:17:40,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 467 states have (on average 1.3040685224839401) internal successors, (609), 474 states have internal predecessors, (609), 100 states have call successors, (100), 68 states have call predecessors, (100), 74 states have return successors, (104), 102 states have call predecessors, (104), 96 states have call successors, (104) [2024-11-09 07:17:40,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 813 transitions. [2024-11-09 07:17:40,041 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 813 transitions. Word has length 46 [2024-11-09 07:17:40,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:17:40,042 INFO L471 AbstractCegarLoop]: Abstraction has 643 states and 813 transitions. [2024-11-09 07:17:40,042 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-09 07:17:40,042 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 813 transitions. [2024-11-09 07:17:40,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-09 07:17:40,045 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:17:40,045 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 07:17:40,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 07:17:40,046 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:17:40,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:17:40,046 INFO L85 PathProgramCache]: Analyzing trace with hash -254262022, now seen corresponding path program 1 times [2024-11-09 07:17:40,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:17:40,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355425240] [2024-11-09 07:17:40,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:17:40,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:17:40,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:17:40,113 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 07:17:40,113 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:17:40,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355425240] [2024-11-09 07:17:40,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355425240] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:17:40,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:17:40,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 07:17:40,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421574201] [2024-11-09 07:17:40,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:17:40,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:17:40,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:17:40,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:17:40,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:17:40,117 INFO L87 Difference]: Start difference. First operand 643 states and 813 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 07:17:40,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:17:40,369 INFO L93 Difference]: Finished difference Result 1207 states and 1483 transitions. [2024-11-09 07:17:40,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:17:40,370 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 07:17:40,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:17:40,376 INFO L225 Difference]: With dead ends: 1207 [2024-11-09 07:17:40,376 INFO L226 Difference]: Without dead ends: 775 [2024-11-09 07:17:40,378 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 07:17:40,379 INFO L432 NwaCegarLoop]: 278 mSDtfsCounter, 67 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:17:40,380 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 525 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 07:17:40,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2024-11-09 07:17:40,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 670. [2024-11-09 07:17:40,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 490 states have (on average 1.2938775510204081) internal successors, (634), 497 states have internal predecessors, (634), 102 states have call successors, (102), 70 states have call predecessors, (102), 76 states have return successors, (106), 104 states have call predecessors, (106), 98 states have call successors, (106) [2024-11-09 07:17:40,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 842 transitions. [2024-11-09 07:17:40,529 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 842 transitions. Word has length 47 [2024-11-09 07:17:40,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:17:40,530 INFO L471 AbstractCegarLoop]: Abstraction has 670 states and 842 transitions. [2024-11-09 07:17:40,530 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 07:17:40,531 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 842 transitions. [2024-11-09 07:17:40,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-09 07:17:40,533 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:17:40,534 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:17:40,534 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 07:17:40,535 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:17:40,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:17:40,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1413650322, now seen corresponding path program 1 times [2024-11-09 07:17:40,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:17:40,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86628919] [2024-11-09 07:17:40,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:17:40,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:17:40,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:17:40,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 07:17:40,661 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:17:40,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86628919] [2024-11-09 07:17:40,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86628919] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:17:40,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:17:40,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 07:17:40,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040651697] [2024-11-09 07:17:40,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:17:40,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:17:40,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:17:40,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:17:40,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:17:40,667 INFO L87 Difference]: Start difference. First operand 670 states and 842 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 07:17:40,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:17:40,889 INFO L93 Difference]: Finished difference Result 860 states and 1063 transitions. [2024-11-09 07:17:40,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:17:40,890 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2024-11-09 07:17:40,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:17:40,896 INFO L225 Difference]: With dead ends: 860 [2024-11-09 07:17:40,896 INFO L226 Difference]: Without dead ends: 587 [2024-11-09 07:17:40,897 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 07:17:40,899 INFO L432 NwaCegarLoop]: 280 mSDtfsCounter, 291 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:17:40,904 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 341 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:17:40,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2024-11-09 07:17:40,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 478. [2024-11-09 07:17:40,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 350 states have (on average 1.2914285714285714) internal successors, (452), 355 states have internal predecessors, (452), 78 states have call successors, (78), 50 states have call predecessors, (78), 48 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) [2024-11-09 07:17:40,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 604 transitions. [2024-11-09 07:17:40,963 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 604 transitions. Word has length 53 [2024-11-09 07:17:40,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:17:40,967 INFO L471 AbstractCegarLoop]: Abstraction has 478 states and 604 transitions. [2024-11-09 07:17:40,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 07:17:40,967 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 604 transitions. [2024-11-09 07:17:40,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-09 07:17:40,969 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:17:40,969 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 07:17:40,969 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 07:17:40,969 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:17:40,970 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:17:40,970 INFO L85 PathProgramCache]: Analyzing trace with hash 2076974067, now seen corresponding path program 1 times [2024-11-09 07:17:40,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:17:40,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860861436] [2024-11-09 07:17:40,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:17:40,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:17:40,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:17:41,052 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 07:17:41,052 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:17:41,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860861436] [2024-11-09 07:17:41,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860861436] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:17:41,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:17:41,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 07:17:41,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428571875] [2024-11-09 07:17:41,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:17:41,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 07:17:41,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:17:41,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 07:17:41,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 07:17:41,055 INFO L87 Difference]: Start difference. First operand 478 states and 604 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 07:17:41,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:17:41,428 INFO L93 Difference]: Finished difference Result 581 states and 720 transitions. [2024-11-09 07:17:41,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 07:17:41,429 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 07:17:41,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:17:41,432 INFO L225 Difference]: With dead ends: 581 [2024-11-09 07:17:41,432 INFO L226 Difference]: Without dead ends: 578 [2024-11-09 07:17:41,433 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 07:17:41,434 INFO L432 NwaCegarLoop]: 272 mSDtfsCounter, 531 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 07:17:41,435 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [531 Valid, 312 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 07:17:41,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2024-11-09 07:17:41,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 477. [2024-11-09 07:17:41,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 350 states have (on average 1.282857142857143) internal successors, (449), 354 states have internal predecessors, (449), 77 states have call successors, (77), 50 states have call predecessors, (77), 48 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) [2024-11-09 07:17:41,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 600 transitions. [2024-11-09 07:17:41,490 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 600 transitions. Word has length 54 [2024-11-09 07:17:41,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:17:41,490 INFO L471 AbstractCegarLoop]: Abstraction has 477 states and 600 transitions. [2024-11-09 07:17:41,491 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 07:17:41,491 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 600 transitions. [2024-11-09 07:17:41,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-09 07:17:41,492 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:17:41,492 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 07:17:41,492 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 07:17:41,493 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:17:41,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:17:41,493 INFO L85 PathProgramCache]: Analyzing trace with hash -39479486, now seen corresponding path program 1 times [2024-11-09 07:17:41,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:17:41,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087058568] [2024-11-09 07:17:41,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:17:41,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:17:41,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:17:41,621 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 07:17:41,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:17:41,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087058568] [2024-11-09 07:17:41,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087058568] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:17:41,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723581738] [2024-11-09 07:17:41,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:17:41,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:17:41,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:17:41,625 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:17:41,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 07:17:41,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:17:41,758 INFO L255 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 07:17:41,764 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:17:42,039 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 07:17:42,039 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:17:42,155 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 07:17:42,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723581738] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:17:42,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [295100481] [2024-11-09 07:17:42,183 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2024-11-09 07:17:42,183 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:17:42,188 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:17:42,194 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:17:42,195 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:17:48,373 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 171 for LOIs [2024-11-09 07:17:48,442 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 167 for LOIs [2024-11-09 07:17:48,528 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 175 for LOIs [2024-11-09 07:17:49,514 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 171 for LOIs [2024-11-09 07:17:49,759 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 171 for LOIs [2024-11-09 07:17:49,958 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 171 for LOIs [2024-11-09 07:17:50,021 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 178 for LOIs [2024-11-09 07:17:50,104 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:18:08,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [295100481] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:18:08,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:18:08,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [5, 5, 4] total 36 [2024-11-09 07:18:08,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773404476] [2024-11-09 07:18:08,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:18:08,085 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-09 07:18:08,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:18:08,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-09 07:18:08,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 07:18:08,087 INFO L87 Difference]: Start difference. First operand 477 states and 600 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 07:18:26,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:18:26,120 INFO L93 Difference]: Finished difference Result 819 states and 993 transitions. [2024-11-09 07:18:26,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-09 07:18:26,121 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 07:18:26,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:18:26,124 INFO L225 Difference]: With dead ends: 819 [2024-11-09 07:18:26,125 INFO L226 Difference]: Without dead ends: 504 [2024-11-09 07:18:26,127 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 131 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 26.8s TimeCoverageRelationStatistics Valid=405, Invalid=1947, Unknown=0, NotChecked=0, Total=2352 [2024-11-09 07:18:26,128 INFO L432 NwaCegarLoop]: 253 mSDtfsCounter, 116 mSDsluCounter, 2287 mSDsCounter, 0 mSdLazyCounter, 4351 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 2540 SdHoareTripleChecker+Invalid, 4446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 4351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2024-11-09 07:18:26,128 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 2540 Invalid, 4446 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [95 Valid, 4351 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2024-11-09 07:18:26,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2024-11-09 07:18:26,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 496. [2024-11-09 07:18:26,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 367 states have (on average 1.2779291553133516) internal successors, (469), 371 states have internal predecessors, (469), 78 states have call successors, (78), 51 states have call predecessors, (78), 49 states have return successors, (75), 75 states have call predecessors, (75), 75 states have call successors, (75) [2024-11-09 07:18:26,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 622 transitions. [2024-11-09 07:18:26,243 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 622 transitions. Word has length 55 [2024-11-09 07:18:26,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:18:26,244 INFO L471 AbstractCegarLoop]: Abstraction has 496 states and 622 transitions. [2024-11-09 07:18:26,244 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 07:18:26,244 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 622 transitions. [2024-11-09 07:18:26,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-09 07:18:26,246 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:18:26,246 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] [2024-11-09 07:18:26,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 07:18:26,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:18:26,447 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:18:26,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:18:26,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1844375231, now seen corresponding path program 1 times [2024-11-09 07:18:26,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:18:26,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852863717] [2024-11-09 07:18:26,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:18:26,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:18:26,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:18:26,564 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 07:18:26,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:18:26,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852863717] [2024-11-09 07:18:26,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852863717] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:18:26,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:18:26,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 07:18:26,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835920201] [2024-11-09 07:18:26,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:18:26,566 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 07:18:26,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:18:26,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 07:18:26,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 07:18:26,567 INFO L87 Difference]: Start difference. First operand 496 states and 622 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 07:18:27,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:18:27,438 INFO L93 Difference]: Finished difference Result 1209 states and 1754 transitions. [2024-11-09 07:18:27,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 07:18:27,439 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 56 [2024-11-09 07:18:27,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:18:27,446 INFO L225 Difference]: With dead ends: 1209 [2024-11-09 07:18:27,446 INFO L226 Difference]: Without dead ends: 1058 [2024-11-09 07:18:27,448 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 07:18:27,449 INFO L432 NwaCegarLoop]: 431 mSDtfsCounter, 1127 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1128 SdHoareTripleChecker+Valid, 1101 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 07:18:27,449 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1128 Valid, 1101 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 07:18:27,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2024-11-09 07:18:27,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 1045. [2024-11-09 07:18:27,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 823 states have (on average 1.3815309842041312) internal successors, (1137), 830 states have internal predecessors, (1137), 147 states have call successors, (147), 75 states have call predecessors, (147), 73 states have return successors, (190), 141 states have call predecessors, (190), 144 states have call successors, (190) [2024-11-09 07:18:27,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 1474 transitions. [2024-11-09 07:18:27,610 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 1474 transitions. Word has length 56 [2024-11-09 07:18:27,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:18:27,610 INFO L471 AbstractCegarLoop]: Abstraction has 1045 states and 1474 transitions. [2024-11-09 07:18:27,610 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 07:18:27,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 1474 transitions. [2024-11-09 07:18:27,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-09 07:18:27,612 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:18:27,612 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 07:18:27,612 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 07:18:27,612 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:18:27,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:18:27,613 INFO L85 PathProgramCache]: Analyzing trace with hash -676516446, now seen corresponding path program 1 times [2024-11-09 07:18:27,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:18:27,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281857181] [2024-11-09 07:18:27,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:18:27,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:18:27,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:18:27,675 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 07:18:27,676 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:18:27,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281857181] [2024-11-09 07:18:27,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281857181] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:18:27,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:18:27,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 07:18:27,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738342487] [2024-11-09 07:18:27,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:18:27,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:18:27,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:18:27,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:18:27,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:18:27,678 INFO L87 Difference]: Start difference. First operand 1045 states and 1474 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 07:18:27,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:18:27,916 INFO L93 Difference]: Finished difference Result 1326 states and 1796 transitions. [2024-11-09 07:18:27,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:18:27,917 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 07:18:27,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:18:27,923 INFO L225 Difference]: With dead ends: 1326 [2024-11-09 07:18:27,924 INFO L226 Difference]: Without dead ends: 1157 [2024-11-09 07:18:27,925 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 07:18:27,926 INFO L432 NwaCegarLoop]: 299 mSDtfsCounter, 42 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:18:27,926 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 562 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:18:27,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2024-11-09 07:18:28,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 1080. [2024-11-09 07:18:28,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 852 states have (on average 1.3767605633802817) internal successors, (1173), 859 states have internal predecessors, (1173), 150 states have call successors, (150), 78 states have call predecessors, (150), 76 states have return successors, (193), 144 states have call predecessors, (193), 147 states have call successors, (193) [2024-11-09 07:18:28,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1516 transitions. [2024-11-09 07:18:28,076 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1516 transitions. Word has length 61 [2024-11-09 07:18:28,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:18:28,076 INFO L471 AbstractCegarLoop]: Abstraction has 1080 states and 1516 transitions. [2024-11-09 07:18:28,077 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 07:18:28,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1516 transitions. [2024-11-09 07:18:28,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-09 07:18:28,080 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:18:28,080 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 07:18:28,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 07:18:28,081 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:18:28,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:18:28,081 INFO L85 PathProgramCache]: Analyzing trace with hash 873829906, now seen corresponding path program 1 times [2024-11-09 07:18:28,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:18:28,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258517073] [2024-11-09 07:18:28,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:18:28,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:18:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:18:28,531 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 07:18:28,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:18:28,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258517073] [2024-11-09 07:18:28,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258517073] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:18:28,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987813763] [2024-11-09 07:18:28,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:18:28,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:18:28,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:18:28,535 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:18:28,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 07:18:28,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:18:28,686 INFO L255 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 07:18:28,690 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:18:28,762 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 07:18:28,763 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:18:28,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987813763] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:18:28,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:18:28,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2024-11-09 07:18:28,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176658375] [2024-11-09 07:18:28,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:18:28,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 07:18:28,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:18:28,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 07:18:28,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2024-11-09 07:18:28,767 INFO L87 Difference]: Start difference. First operand 1080 states and 1516 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 07:18:29,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:18:29,251 INFO L93 Difference]: Finished difference Result 1340 states and 1816 transitions. [2024-11-09 07:18:29,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 07:18:29,252 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 07:18:29,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:18:29,260 INFO L225 Difference]: With dead ends: 1340 [2024-11-09 07:18:29,260 INFO L226 Difference]: Without dead ends: 971 [2024-11-09 07:18:29,262 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 07:18:29,263 INFO L432 NwaCegarLoop]: 280 mSDtfsCounter, 248 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 07:18:29,264 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 1124 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 07:18:29,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2024-11-09 07:18:29,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 967. [2024-11-09 07:18:29,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 777 states have (on average 1.3963963963963963) internal successors, (1085), 784 states have internal predecessors, (1085), 129 states have call successors, (129), 61 states have call predecessors, (129), 59 states have return successors, (172), 123 states have call predecessors, (172), 126 states have call successors, (172) [2024-11-09 07:18:29,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 1386 transitions. [2024-11-09 07:18:29,428 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 1386 transitions. Word has length 102 [2024-11-09 07:18:29,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:18:29,428 INFO L471 AbstractCegarLoop]: Abstraction has 967 states and 1386 transitions. [2024-11-09 07:18:29,429 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 07:18:29,429 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 1386 transitions. [2024-11-09 07:18:29,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-09 07:18:29,431 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:18:29,431 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 07:18:29,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 07:18:29,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 07:18:29,636 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:18:29,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:18:29,637 INFO L85 PathProgramCache]: Analyzing trace with hash -2095157363, now seen corresponding path program 1 times [2024-11-09 07:18:29,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:18:29,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337060908] [2024-11-09 07:18:29,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:18:29,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:18:29,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:18:29,888 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 07:18:29,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:18:29,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337060908] [2024-11-09 07:18:29,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337060908] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:18:29,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889408338] [2024-11-09 07:18:29,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:18:29,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:18:29,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:18:29,891 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:18:29,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 07:18:30,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:18:30,071 INFO L255 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 07:18:30,078 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:18:30,471 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 07:18:30,471 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:18:30,658 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 07:18:30,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889408338] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:18:30,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [384973675] [2024-11-09 07:18:30,662 INFO L159 IcfgInterpreter]: Started Sifa with 65 locations of interest [2024-11-09 07:18:30,662 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:18:30,663 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:18:30,663 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:18:30,663 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:18:50,898 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 209 for LOIs [2024-11-09 07:18:51,265 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 173 for LOIs [2024-11-09 07:18:51,613 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 130 for LOIs [2024-11-09 07:18:51,670 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 194 for LOIs [2024-11-09 07:18:54,247 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 195 for LOIs [2024-11-09 07:18:56,541 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 144 for LOIs [2024-11-09 07:18:56,700 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 188 for LOIs [2024-11-09 07:18:57,027 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 199 for LOIs [2024-11-09 07:18:57,366 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:19:40,806 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24214#(and (= ~q_req_up~0 1) (= ~q_free~0 1) (exists ((|v_ULTIMATE.start_eval1_~tmp___0~2#1_16| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp___0~2#1_16| 0)) (<= |v_ULTIMATE.start_eval1_~tmp___0~2#1_16| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp___0~2#1_16| 2147483648)))) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~q_buf_0~0) (exists ((v_~c_last_read~0_10 Int) (v_~q_free~0_44 Int)) (and (<= v_~q_free~0_44 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (not (= ~p_dw_st~0 0)) (<= 1 |#StackHeapBarrier|) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= v_~c_last_read~0_10 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) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t2_i~0 0) (= 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)) (= ~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) (= ~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) (<= 0 v_~q_free~0_44) (not (= v_~q_free~0_44 1)) (= ~t1_i~0 0))) (= ~c_dr_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (= ~c_dr_st~0 1))' at error location [2024-11-09 07:19:40,806 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:19:40,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:19:40,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 13 [2024-11-09 07:19:40,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572287044] [2024-11-09 07:19:40,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:19:40,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 07:19:40,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:19:40,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 07:19:40,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=2973, Unknown=0, NotChecked=0, Total=3306 [2024-11-09 07:19:40,810 INFO L87 Difference]: Start difference. First operand 967 states and 1386 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 07:19:44,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:19:44,774 INFO L93 Difference]: Finished difference Result 1907 states and 2473 transitions. [2024-11-09 07:19:44,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-09 07:19:44,775 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 07:19:44,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:19:44,784 INFO L225 Difference]: With dead ends: 1907 [2024-11-09 07:19:44,784 INFO L226 Difference]: Without dead ends: 1725 [2024-11-09 07:19:44,790 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 274 SyntacticMatches, 6 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 4738 ImplicationChecksByTransitivity, 45.4s TimeCoverageRelationStatistics Valid=1088, Invalid=12252, Unknown=0, NotChecked=0, Total=13340 [2024-11-09 07:19:44,791 INFO L432 NwaCegarLoop]: 263 mSDtfsCounter, 1123 mSDsluCounter, 1715 mSDsCounter, 0 mSdLazyCounter, 2380 mSolverCounterSat, 408 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1128 SdHoareTripleChecker+Valid, 1978 SdHoareTripleChecker+Invalid, 2788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 408 IncrementalHoareTripleChecker+Valid, 2380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-09 07:19:44,791 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1128 Valid, 1978 Invalid, 2788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [408 Valid, 2380 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-09 07:19:44,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1725 states. [2024-11-09 07:19:45,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1725 to 1362. [2024-11-09 07:19:45,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 1062 states have (on average 1.3370998116760828) internal successors, (1420), 1069 states have internal predecessors, (1420), 187 states have call successors, (187), 113 states have call predecessors, (187), 111 states have return successors, (230), 181 states have call predecessors, (230), 184 states have call successors, (230) [2024-11-09 07:19:45,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 1837 transitions. [2024-11-09 07:19:45,040 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 1837 transitions. Word has length 104 [2024-11-09 07:19:45,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:19:45,041 INFO L471 AbstractCegarLoop]: Abstraction has 1362 states and 1837 transitions. [2024-11-09 07:19:45,041 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 07:19:45,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 1837 transitions. [2024-11-09 07:19:45,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-09 07:19:45,044 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:19:45,044 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 07:19:45,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 07:19:45,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:19:45,245 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:19:45,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:19:45,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1999423877, now seen corresponding path program 1 times [2024-11-09 07:19:45,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:19:45,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8078164] [2024-11-09 07:19:45,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:19:45,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:19:45,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:19:45,314 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 07:19:45,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:19:45,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8078164] [2024-11-09 07:19:45,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8078164] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:19:45,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:19:45,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 07:19:45,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118692005] [2024-11-09 07:19:45,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:19:45,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:19:45,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:19:45,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:19:45,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:19:45,317 INFO L87 Difference]: Start difference. First operand 1362 states and 1837 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 07:19:45,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:19:45,622 INFO L93 Difference]: Finished difference Result 1861 states and 2409 transitions. [2024-11-09 07:19:45,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:19:45,623 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 07:19:45,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:19:45,632 INFO L225 Difference]: With dead ends: 1861 [2024-11-09 07:19:45,632 INFO L226 Difference]: Without dead ends: 1352 [2024-11-09 07:19:45,634 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 07:19:45,635 INFO L432 NwaCegarLoop]: 304 mSDtfsCounter, 294 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:19:45,635 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 370 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:19:45,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2024-11-09 07:19:45,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1343. [2024-11-09 07:19:45,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 1045 states have (on average 1.3282296650717704) internal successors, (1388), 1052 states have internal predecessors, (1388), 186 states have call successors, (186), 112 states have call predecessors, (186), 110 states have return successors, (229), 180 states have call predecessors, (229), 183 states have call successors, (229) [2024-11-09 07:19:45,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 1803 transitions. [2024-11-09 07:19:45,903 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 1803 transitions. Word has length 108 [2024-11-09 07:19:45,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:19:45,904 INFO L471 AbstractCegarLoop]: Abstraction has 1343 states and 1803 transitions. [2024-11-09 07:19:45,904 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 07:19:45,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 1803 transitions. [2024-11-09 07:19:45,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-09 07:19:45,908 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:19:45,908 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 07:19:45,908 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-09 07:19:45,909 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:19:45,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:19:45,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1097887193, now seen corresponding path program 1 times [2024-11-09 07:19:45,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:19:45,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39701906] [2024-11-09 07:19:45,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:19:45,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:19:45,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:19:46,159 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 07:19:46,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:19:46,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39701906] [2024-11-09 07:19:46,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39701906] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:19:46,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608551664] [2024-11-09 07:19:46,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:19:46,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:19:46,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:19:46,163 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:19:46,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 07:19:46,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:19:46,348 INFO L255 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 07:19:46,352 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:19:46,463 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 07:19:46,463 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:19:46,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608551664] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:19:46,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:19:46,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2024-11-09 07:19:46,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777740821] [2024-11-09 07:19:46,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:19:46,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 07:19:46,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:19:46,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 07:19:46,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-11-09 07:19:46,466 INFO L87 Difference]: Start difference. First operand 1343 states and 1803 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 07:19:47,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:19:47,058 INFO L93 Difference]: Finished difference Result 1863 states and 2397 transitions. [2024-11-09 07:19:47,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 07:19:47,059 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 07:19:47,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:19:47,069 INFO L225 Difference]: With dead ends: 1863 [2024-11-09 07:19:47,069 INFO L226 Difference]: Without dead ends: 1314 [2024-11-09 07:19:47,071 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 07:19:47,072 INFO L432 NwaCegarLoop]: 293 mSDtfsCounter, 47 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1177 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 07:19:47,073 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 1177 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 07:19:47,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1314 states. [2024-11-09 07:19:47,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1314 to 1254. [2024-11-09 07:19:47,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 984 states have (on average 1.339430894308943) internal successors, (1318), 991 states have internal predecessors, (1318), 171 states have call successors, (171), 99 states have call predecessors, (171), 97 states have return successors, (214), 165 states have call predecessors, (214), 168 states have call successors, (214) [2024-11-09 07:19:47,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 1703 transitions. [2024-11-09 07:19:47,330 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 1703 transitions. Word has length 112 [2024-11-09 07:19:47,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:19:47,330 INFO L471 AbstractCegarLoop]: Abstraction has 1254 states and 1703 transitions. [2024-11-09 07:19:47,330 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 07:19:47,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 1703 transitions. [2024-11-09 07:19:47,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-09 07:19:47,334 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:19:47,334 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 07:19:47,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 07:19:47,534 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 07:19:47,535 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:19:47,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:19:47,535 INFO L85 PathProgramCache]: Analyzing trace with hash 85225725, now seen corresponding path program 1 times [2024-11-09 07:19:47,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:19:47,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372027210] [2024-11-09 07:19:47,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:19:47,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:19:47,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:19:47,750 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 07:19:47,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:19:47,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372027210] [2024-11-09 07:19:47,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372027210] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:19:47,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:19:47,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 07:19:47,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365489560] [2024-11-09 07:19:47,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:19:47,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 07:19:47,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:19:47,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 07:19:47,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:19:47,752 INFO L87 Difference]: Start difference. First operand 1254 states and 1703 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 07:19:48,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:19:48,233 INFO L93 Difference]: Finished difference Result 2003 states and 2548 transitions. [2024-11-09 07:19:48,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 07:19:48,233 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 07:19:48,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:19:48,242 INFO L225 Difference]: With dead ends: 2003 [2024-11-09 07:19:48,242 INFO L226 Difference]: Without dead ends: 1546 [2024-11-09 07:19:48,245 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 07:19:48,245 INFO L432 NwaCegarLoop]: 298 mSDtfsCounter, 283 mSDsluCounter, 954 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 1252 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:19:48,246 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 1252 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 07:19:48,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2024-11-09 07:19:48,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1512. [2024-11-09 07:19:48,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1146 states have (on average 1.307155322862129) internal successors, (1498), 1159 states have internal predecessors, (1498), 219 states have call successors, (219), 141 states have call predecessors, (219), 145 states have return successors, (274), 213 states have call predecessors, (274), 216 states have call successors, (274) [2024-11-09 07:19:48,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 1991 transitions. [2024-11-09 07:19:48,567 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 1991 transitions. Word has length 113 [2024-11-09 07:19:48,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:19:48,568 INFO L471 AbstractCegarLoop]: Abstraction has 1512 states and 1991 transitions. [2024-11-09 07:19:48,568 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 07:19:48,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 1991 transitions. [2024-11-09 07:19:48,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-11-09 07:19:48,572 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:19:48,572 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 07:19:48,572 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-09 07:19:48,572 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:19:48,573 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:19:48,573 INFO L85 PathProgramCache]: Analyzing trace with hash 769852699, now seen corresponding path program 1 times [2024-11-09 07:19:48,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:19:48,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420134794] [2024-11-09 07:19:48,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:19:48,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:19:48,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:19:49,909 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 07:19:49,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:19:49,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420134794] [2024-11-09 07:19:49,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420134794] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:19:49,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237259750] [2024-11-09 07:19:49,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:19:49,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:19:49,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:19:49,912 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:19:49,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 07:19:50,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:19:50,061 INFO L255 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-09 07:19:50,066 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:19:51,525 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 07:19:51,525 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:19:54,474 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 07:19:54,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237259750] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:19:54,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [507637376] [2024-11-09 07:19:54,477 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2024-11-09 07:19:54,477 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:19:54,478 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:19:54,478 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:19:54,478 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:20:28,590 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 220 for LOIs [2024-11-09 07:20:28,820 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 13 for LOIs [2024-11-09 07:20:28,821 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2024-11-09 07:20:28,824 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 184 for LOIs [2024-11-09 07:20:30,058 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 185 for LOIs [2024-11-09 07:20:31,092 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 21 for LOIs [2024-11-09 07:20:31,121 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 178 for LOIs [2024-11-09 07:20:31,306 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 189 for LOIs [2024-11-09 07:20:31,505 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:20:49,473 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '43747#(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 07:20:49,473 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:20:49,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:20:49,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 19, 22] total 63 [2024-11-09 07:20:49,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882852379] [2024-11-09 07:20:49,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:20:49,475 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-11-09 07:20:49,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:20:49,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-11-09 07:20:49,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1033, Invalid=11399, Unknown=0, NotChecked=0, Total=12432 [2024-11-09 07:20:49,480 INFO L87 Difference]: Start difference. First operand 1512 states and 1991 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 07:21:22,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:21:22,166 INFO L93 Difference]: Finished difference Result 5247 states and 6605 transitions. [2024-11-09 07:21:22,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 364 states. [2024-11-09 07:21:22,167 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 07:21:22,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:21:22,189 INFO L225 Difference]: With dead ends: 5247 [2024-11-09 07:21:22,189 INFO L226 Difference]: Without dead ends: 4532 [2024-11-09 07:21:22,224 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 296 SyntacticMatches, 7 SemanticMatches, 471 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 93387 ImplicationChecksByTransitivity, 43.0s TimeCoverageRelationStatistics Valid=21001, Invalid=202255, Unknown=0, NotChecked=0, Total=223256 [2024-11-09 07:21:22,225 INFO L432 NwaCegarLoop]: 318 mSDtfsCounter, 7241 mSDsluCounter, 7049 mSDsCounter, 0 mSdLazyCounter, 10262 mSolverCounterSat, 3312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7241 SdHoareTripleChecker+Valid, 7367 SdHoareTripleChecker+Invalid, 13574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3312 IncrementalHoareTripleChecker+Valid, 10262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2024-11-09 07:21:22,225 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7241 Valid, 7367 Invalid, 13574 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3312 Valid, 10262 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2024-11-09 07:21:22,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4532 states. [2024-11-09 07:21:22,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4532 to 2018. [2024-11-09 07:21:22,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 1500 states have (on average 1.27) internal successors, (1905), 1515 states have internal predecessors, (1905), 291 states have call successors, (291), 199 states have call predecessors, (291), 225 states have return successors, (374), 305 states have call predecessors, (374), 288 states have call successors, (374) [2024-11-09 07:21:22,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 2570 transitions. [2024-11-09 07:21:22,687 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 2570 transitions. Word has length 114 [2024-11-09 07:21:22,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:21:22,687 INFO L471 AbstractCegarLoop]: Abstraction has 2018 states and 2570 transitions. [2024-11-09 07:21:22,688 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 07:21:22,688 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 2570 transitions. [2024-11-09 07:21:22,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-11-09 07:21:22,692 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:21:22,692 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 07:21:22,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 07:21:22,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 07:21:22,893 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:21:22,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:21:22,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1079546262, now seen corresponding path program 1 times [2024-11-09 07:21:22,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:21:22,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983949671] [2024-11-09 07:21:22,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:21:22,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:21:22,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:21:23,244 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 07:21:23,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:21:23,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983949671] [2024-11-09 07:21:23,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983949671] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:21:23,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128690245] [2024-11-09 07:21:23,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:21:23,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:21:23,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:21:23,246 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:21:23,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 07:21:23,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:21:23,397 INFO L255 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 07:21:23,401 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:21:23,499 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 07:21:23,500 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:21:23,719 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 07:21:23,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128690245] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 07:21:23,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:21:23,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2024-11-09 07:21:23,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888714539] [2024-11-09 07:21:23,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:21:23,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 07:21:23,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:21:23,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 07:21:23,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2024-11-09 07:21:23,723 INFO L87 Difference]: Start difference. First operand 2018 states and 2570 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 07:21:24,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:21:24,942 INFO L93 Difference]: Finished difference Result 3602 states and 4424 transitions. [2024-11-09 07:21:24,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 07:21:24,943 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 07:21:24,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:21:24,954 INFO L225 Difference]: With dead ends: 3602 [2024-11-09 07:21:24,955 INFO L226 Difference]: Without dead ends: 2381 [2024-11-09 07:21:24,958 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 07:21:24,959 INFO L432 NwaCegarLoop]: 237 mSDtfsCounter, 420 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 07:21:24,959 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 816 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 07:21:24,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2024-11-09 07:21:25,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 2060. [2024-11-09 07:21:25,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2060 states, 1521 states have (on average 1.2689020381328073) internal successors, (1930), 1536 states have internal predecessors, (1930), 306 states have call successors, (306), 204 states have call predecessors, (306), 231 states have return successors, (402), 321 states have call predecessors, (402), 303 states have call successors, (402) [2024-11-09 07:21:25,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2060 states to 2060 states and 2638 transitions. [2024-11-09 07:21:25,358 INFO L78 Accepts]: Start accepts. Automaton has 2060 states and 2638 transitions. Word has length 115 [2024-11-09 07:21:25,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:21:25,358 INFO L471 AbstractCegarLoop]: Abstraction has 2060 states and 2638 transitions. [2024-11-09 07:21:25,359 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 07:21:25,359 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states and 2638 transitions. [2024-11-09 07:21:25,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-11-09 07:21:25,362 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:21:25,362 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:21:25,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 07:21:25,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 07:21:25,567 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:21:25,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:21:25,567 INFO L85 PathProgramCache]: Analyzing trace with hash 186344354, now seen corresponding path program 1 times [2024-11-09 07:21:25,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:21:25,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209714016] [2024-11-09 07:21:25,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:21:25,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:21:25,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:21:25,696 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 07:21:25,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:21:25,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209714016] [2024-11-09 07:21:25,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209714016] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:21:25,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356311346] [2024-11-09 07:21:25,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:21:25,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:21:25,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:21:25,699 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:21:25,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 07:21:25,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:21:25,921 INFO L255 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 07:21:25,925 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:21:25,964 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-09 07:21:25,964 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:21:25,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356311346] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:21:25,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:21:25,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 07:21:25,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351002715] [2024-11-09 07:21:25,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:21:25,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:21:25,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:21:25,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:21:25,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:21:25,968 INFO L87 Difference]: Start difference. First operand 2060 states and 2638 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 07:21:26,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:21:26,599 INFO L93 Difference]: Finished difference Result 3444 states and 4852 transitions. [2024-11-09 07:21:26,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:21:26,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 110 [2024-11-09 07:21:26,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:21:26,612 INFO L225 Difference]: With dead ends: 3444 [2024-11-09 07:21:26,612 INFO L226 Difference]: Without dead ends: 2744 [2024-11-09 07:21:26,616 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 110 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 07:21:26,616 INFO L432 NwaCegarLoop]: 264 mSDtfsCounter, 290 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:21:26,617 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 446 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:21:26,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2744 states. [2024-11-09 07:21:27,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2744 to 2735. [2024-11-09 07:21:27,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2735 states, 2084 states have (on average 1.3195777351247602) internal successors, (2750), 2102 states have internal predecessors, (2750), 388 states have call successors, (388), 234 states have call predecessors, (388), 261 states have return successors, (526), 400 states have call predecessors, (526), 385 states have call successors, (526) [2024-11-09 07:21:27,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2735 states to 2735 states and 3664 transitions. [2024-11-09 07:21:27,084 INFO L78 Accepts]: Start accepts. Automaton has 2735 states and 3664 transitions. Word has length 110 [2024-11-09 07:21:27,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:21:27,084 INFO L471 AbstractCegarLoop]: Abstraction has 2735 states and 3664 transitions. [2024-11-09 07:21:27,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 07:21:27,085 INFO L276 IsEmpty]: Start isEmpty. Operand 2735 states and 3664 transitions. [2024-11-09 07:21:27,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-11-09 07:21:27,090 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:21:27,090 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:21:27,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 07:21:27,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:21:27,291 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:21:27,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:21:27,291 INFO L85 PathProgramCache]: Analyzing trace with hash -724580030, now seen corresponding path program 1 times [2024-11-09 07:21:27,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:21:27,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251351047] [2024-11-09 07:21:27,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:21:27,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:21:27,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:21:27,401 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 07:21:27,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:21:27,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251351047] [2024-11-09 07:21:27,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251351047] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:21:27,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038154417] [2024-11-09 07:21:27,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:21:27,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:21:27,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:21:27,404 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:21:27,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 07:21:27,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:21:27,600 INFO L255 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 07:21:27,603 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:21:27,652 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 07:21:27,652 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:21:27,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038154417] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:21:27,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:21:27,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 07:21:27,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870802272] [2024-11-09 07:21:27,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:21:27,653 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:21:27,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:21:27,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:21:27,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:21:27,654 INFO L87 Difference]: Start difference. First operand 2735 states and 3664 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 07:21:28,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:21:28,362 INFO L93 Difference]: Finished difference Result 5454 states and 7986 transitions. [2024-11-09 07:21:28,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:21:28,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 110 [2024-11-09 07:21:28,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:21:28,379 INFO L225 Difference]: With dead ends: 5454 [2024-11-09 07:21:28,380 INFO L226 Difference]: Without dead ends: 4079 [2024-11-09 07:21:28,386 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 110 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 07:21:28,387 INFO L432 NwaCegarLoop]: 264 mSDtfsCounter, 281 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:21:28,387 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 446 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:21:28,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4079 states. [2024-11-09 07:21:28,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4079 to 4065. [2024-11-09 07:21:28,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4065 states, 3195 states have (on average 1.3646322378716744) internal successors, (4360), 3219 states have internal predecessors, (4360), 547 states have call successors, (547), 294 states have call predecessors, (547), 321 states have return successors, (765), 553 states have call predecessors, (765), 544 states have call successors, (765) [2024-11-09 07:21:28,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4065 states to 4065 states and 5672 transitions. [2024-11-09 07:21:28,922 INFO L78 Accepts]: Start accepts. Automaton has 4065 states and 5672 transitions. Word has length 110 [2024-11-09 07:21:28,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:21:28,922 INFO L471 AbstractCegarLoop]: Abstraction has 4065 states and 5672 transitions. [2024-11-09 07:21:28,922 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 07:21:28,923 INFO L276 IsEmpty]: Start isEmpty. Operand 4065 states and 5672 transitions. [2024-11-09 07:21:28,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-11-09 07:21:28,927 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:21:28,928 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 07:21:28,953 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 07:21:29,128 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 07:21:29,128 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:21:29,129 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:21:29,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1029402718, now seen corresponding path program 1 times [2024-11-09 07:21:29,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:21:29,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487192570] [2024-11-09 07:21:29,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:21:29,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:21:29,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:21:29,244 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 07:21:29,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:21:29,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487192570] [2024-11-09 07:21:29,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487192570] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:21:29,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672251852] [2024-11-09 07:21:29,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:21:29,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:21:29,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:21:29,247 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:21:29,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 07:21:29,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:21:29,474 INFO L255 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 07:21:29,477 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:21:29,524 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 07:21:29,525 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:21:29,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672251852] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:21:29,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:21:29,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 07:21:29,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005461523] [2024-11-09 07:21:29,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:21:29,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:21:29,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:21:29,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:21:29,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:21:29,527 INFO L87 Difference]: Start difference. First operand 4065 states and 5672 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 07:21:30,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:21:30,454 INFO L93 Difference]: Finished difference Result 9414 states and 14113 transitions. [2024-11-09 07:21:30,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:21:30,454 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 110 [2024-11-09 07:21:30,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:21:30,486 INFO L225 Difference]: With dead ends: 9414 [2024-11-09 07:21:30,486 INFO L226 Difference]: Without dead ends: 6709 [2024-11-09 07:21:30,501 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 110 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 07:21:30,502 INFO L432 NwaCegarLoop]: 264 mSDtfsCounter, 287 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:21:30,502 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 446 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:21:30,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6709 states. [2024-11-09 07:21:31,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6709 to 6685. [2024-11-09 07:21:31,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6685 states, 5387 states have (on average 1.3959532207165397) internal successors, (7520), 5423 states have internal predecessors, (7520), 855 states have call successors, (855), 414 states have call predecessors, (855), 441 states have return successors, (1225), 849 states have call predecessors, (1225), 852 states have call successors, (1225) [2024-11-09 07:21:31,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6685 states to 6685 states and 9600 transitions. [2024-11-09 07:21:31,392 INFO L78 Accepts]: Start accepts. Automaton has 6685 states and 9600 transitions. Word has length 110 [2024-11-09 07:21:31,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:21:31,393 INFO L471 AbstractCegarLoop]: Abstraction has 6685 states and 9600 transitions. [2024-11-09 07:21:31,393 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 07:21:31,393 INFO L276 IsEmpty]: Start isEmpty. Operand 6685 states and 9600 transitions. [2024-11-09 07:21:31,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-11-09 07:21:31,403 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:21:31,403 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:21:31,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 07:21:31,603 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:21:31,604 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:21:31,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:21:31,605 INFO L85 PathProgramCache]: Analyzing trace with hash -375190014, now seen corresponding path program 1 times [2024-11-09 07:21:31,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:21:31,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430555699] [2024-11-09 07:21:31,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:21:31,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:21:31,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:21:31,727 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 07:21:31,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:21:31,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430555699] [2024-11-09 07:21:31,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430555699] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:21:31,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815011371] [2024-11-09 07:21:31,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:21:31,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:21:31,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:21:31,730 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:21:31,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 07:21:31,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:21:31,919 INFO L255 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 07:21:31,921 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:21:31,970 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 07:21:31,970 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:21:31,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815011371] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:21:31,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:21:31,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 07:21:31,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923813596] [2024-11-09 07:21:31,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:21:31,971 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:21:31,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:21:31,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:21:31,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:21:31,972 INFO L87 Difference]: Start difference. First operand 6685 states and 9600 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 07:21:33,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:21:33,347 INFO L93 Difference]: Finished difference Result 17214 states and 26085 transitions. [2024-11-09 07:21:33,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:21:33,348 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 110 [2024-11-09 07:21:33,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:21:33,403 INFO L225 Difference]: With dead ends: 17214 [2024-11-09 07:21:33,404 INFO L226 Difference]: Without dead ends: 11889 [2024-11-09 07:21:33,427 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 110 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 07:21:33,427 INFO L432 NwaCegarLoop]: 264 mSDtfsCounter, 275 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:21:33,428 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 446 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:21:33,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11889 states. [2024-11-09 07:21:35,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11889 to 11845. [2024-11-09 07:21:35,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11845 states, 9711 states have (on average 1.4128308104211718) internal successors, (13720), 9771 states have internal predecessors, (13720), 1451 states have call successors, (1451), 654 states have call predecessors, (1451), 681 states have return successors, (2109), 1421 states have call predecessors, (2109), 1448 states have call successors, (2109) [2024-11-09 07:21:35,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11845 states to 11845 states and 17280 transitions. [2024-11-09 07:21:35,192 INFO L78 Accepts]: Start accepts. Automaton has 11845 states and 17280 transitions. Word has length 110 [2024-11-09 07:21:35,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:21:35,192 INFO L471 AbstractCegarLoop]: Abstraction has 11845 states and 17280 transitions. [2024-11-09 07:21:35,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 07:21:35,193 INFO L276 IsEmpty]: Start isEmpty. Operand 11845 states and 17280 transitions. [2024-11-09 07:21:35,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-11-09 07:21:35,207 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:21:35,208 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:21:35,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 07:21:35,408 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:21:35,411 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:21:35,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:21:35,412 INFO L85 PathProgramCache]: Analyzing trace with hash -291234718, now seen corresponding path program 1 times [2024-11-09 07:21:35,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:21:35,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830324388] [2024-11-09 07:21:35,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:21:35,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:21:35,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:21:35,519 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-09 07:21:35,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:21:35,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830324388] [2024-11-09 07:21:35,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830324388] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:21:35,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:21:35,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 07:21:35,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999266001] [2024-11-09 07:21:35,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:21:35,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:21:35,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:21:35,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:21:35,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:21:35,522 INFO L87 Difference]: Start difference. First operand 11845 states and 17280 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (9), 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 07:21:37,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:21:37,582 INFO L93 Difference]: Finished difference Result 22761 states and 34307 transitions. [2024-11-09 07:21:37,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:21:37,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (9), 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 110 [2024-11-09 07:21:37,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:21:37,666 INFO L225 Difference]: With dead ends: 22761 [2024-11-09 07:21:37,666 INFO L226 Difference]: Without dead ends: 14341 [2024-11-09 07:21:37,702 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 07:21:37,703 INFO L432 NwaCegarLoop]: 369 mSDtfsCounter, 100 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:21:37,703 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 642 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:21:37,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14341 states. [2024-11-09 07:21:39,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14341 to 13557. [2024-11-09 07:21:39,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13557 states, 11359 states have (on average 1.4402676291927106) internal successors, (16360), 11419 states have internal predecessors, (16360), 1483 states have call successors, (1483), 686 states have call predecessors, (1483), 713 states have return successors, (2141), 1453 states have call predecessors, (2141), 1480 states have call successors, (2141) [2024-11-09 07:21:39,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13557 states to 13557 states and 19984 transitions. [2024-11-09 07:21:39,356 INFO L78 Accepts]: Start accepts. Automaton has 13557 states and 19984 transitions. Word has length 110 [2024-11-09 07:21:39,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:21:39,357 INFO L471 AbstractCegarLoop]: Abstraction has 13557 states and 19984 transitions. [2024-11-09 07:21:39,357 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (9), 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 07:21:39,357 INFO L276 IsEmpty]: Start isEmpty. Operand 13557 states and 19984 transitions. [2024-11-09 07:21:39,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-09 07:21:39,375 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:21:39,375 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 07:21:39,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-09 07:21:39,375 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:21:39,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:21:39,376 INFO L85 PathProgramCache]: Analyzing trace with hash 401305381, now seen corresponding path program 1 times [2024-11-09 07:21:39,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:21:39,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749823488] [2024-11-09 07:21:39,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:21:39,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:21:39,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:21:40,207 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 07:21:40,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:21:40,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749823488] [2024-11-09 07:21:40,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749823488] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:21:40,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495675160] [2024-11-09 07:21:40,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:21:40,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:21:40,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:21:40,210 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:21:40,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 07:21:40,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:21:40,358 INFO L255 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-09 07:21:40,362 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:21:41,349 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 07:21:41,349 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:21:42,919 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 07:21:42,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495675160] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:21:42,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2012133704] [2024-11-09 07:21:42,922 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2024-11-09 07:21:42,923 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:21:42,923 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:21:42,923 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:21:42,923 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:22:04,584 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 221 for LOIs [2024-11-09 07:22:04,851 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 77 for LOIs [2024-11-09 07:22:04,896 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2024-11-09 07:22:04,900 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 185 for LOIs [2024-11-09 07:22:06,239 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 186 for LOIs [2024-11-09 07:22:07,642 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 21 for LOIs [2024-11-09 07:22:07,676 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 179 for LOIs [2024-11-09 07:22:07,983 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 190 for LOIs [2024-11-09 07:22:08,273 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:22:27,522 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '192662#(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 07:22:27,522 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:22:27,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:22:27,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 18] total 49 [2024-11-09 07:22:27,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572209129] [2024-11-09 07:22:27,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:22:27,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-09 07:22:27,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:22:27,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-09 07:22:27,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=923, Invalid=9379, Unknown=0, NotChecked=0, Total=10302 [2024-11-09 07:22:27,527 INFO L87 Difference]: Start difference. First operand 13557 states and 19984 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 07:22:37,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:22:37,288 INFO L93 Difference]: Finished difference Result 16151 states and 23018 transitions. [2024-11-09 07:22:37,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2024-11-09 07:22:37,291 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 07:22:37,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:22:37,353 INFO L225 Difference]: With dead ends: 16151 [2024-11-09 07:22:37,353 INFO L226 Difference]: Without dead ends: 14888 [2024-11-09 07:22:37,363 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 323 SyntacticMatches, 2 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 15911 ImplicationChecksByTransitivity, 23.9s TimeCoverageRelationStatistics Valid=4266, Invalid=36740, Unknown=0, NotChecked=0, Total=41006 [2024-11-09 07:22:37,364 INFO L432 NwaCegarLoop]: 237 mSDtfsCounter, 5041 mSDsluCounter, 2225 mSDsCounter, 0 mSdLazyCounter, 4253 mSolverCounterSat, 2572 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5041 SdHoareTripleChecker+Valid, 2462 SdHoareTripleChecker+Invalid, 6825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2572 IncrementalHoareTripleChecker+Valid, 4253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-11-09 07:22:37,365 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5041 Valid, 2462 Invalid, 6825 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2572 Valid, 4253 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2024-11-09 07:22:37,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14888 states. [2024-11-09 07:22:38,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14888 to 13348. [2024-11-09 07:22:38,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13348 states, 11230 states have (on average 1.4437221727515583) internal successors, (16213), 11292 states have internal predecessors, (16213), 1438 states have call successors, (1438), 651 states have call predecessors, (1438), 678 states have return successors, (2085), 1406 states have call predecessors, (2085), 1435 states have call successors, (2085) [2024-11-09 07:22:38,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13348 states to 13348 states and 19736 transitions. [2024-11-09 07:22:38,836 INFO L78 Accepts]: Start accepts. Automaton has 13348 states and 19736 transitions. Word has length 124 [2024-11-09 07:22:38,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:22:38,837 INFO L471 AbstractCegarLoop]: Abstraction has 13348 states and 19736 transitions. [2024-11-09 07:22:38,837 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 07:22:38,837 INFO L276 IsEmpty]: Start isEmpty. Operand 13348 states and 19736 transitions. [2024-11-09 07:22:38,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-09 07:22:38,854 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:22:38,854 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 07:22:38,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 07:22:39,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-09 07:22:39,055 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:22:39,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:22:39,056 INFO L85 PathProgramCache]: Analyzing trace with hash 833821712, now seen corresponding path program 1 times [2024-11-09 07:22:39,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:22:39,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338326463] [2024-11-09 07:22:39,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:22:39,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:22:39,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:22:39,250 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 07:22:39,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:22:39,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338326463] [2024-11-09 07:22:39,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338326463] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:22:39,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522666927] [2024-11-09 07:22:39,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:22:39,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:22:39,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:22:39,253 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:22:39,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 07:22:39,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:22:39,402 INFO L255 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 07:22:39,405 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:22:39,531 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 07:22:39,531 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:22:39,740 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 07:22:39,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522666927] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 07:22:39,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:22:39,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2024-11-09 07:22:39,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576183362] [2024-11-09 07:22:39,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:22:39,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 07:22:39,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:22:39,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 07:22:39,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-09 07:22:39,743 INFO L87 Difference]: Start difference. First operand 13348 states and 19736 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 07:22:42,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:22:42,152 INFO L93 Difference]: Finished difference Result 14139 states and 20635 transitions. [2024-11-09 07:22:42,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 07:22:42,152 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 07:22:42,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:22:42,209 INFO L225 Difference]: With dead ends: 14139 [2024-11-09 07:22:42,210 INFO L226 Difference]: Without dead ends: 13085 [2024-11-09 07:22:42,220 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 07:22:42,220 INFO L432 NwaCegarLoop]: 226 mSDtfsCounter, 611 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 07:22:42,221 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [612 Valid, 784 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 07:22:42,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13085 states. [2024-11-09 07:22:44,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13085 to 13029. [2024-11-09 07:22:44,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13029 states, 10987 states have (on average 1.4485300810048238) internal successors, (15915), 11049 states have internal predecessors, (15915), 1399 states have call successors, (1399), 618 states have call predecessors, (1399), 641 states have return successors, (2041), 1363 states have call predecessors, (2041), 1396 states have call successors, (2041) [2024-11-09 07:22:44,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13029 states to 13029 states and 19355 transitions. [2024-11-09 07:22:44,256 INFO L78 Accepts]: Start accepts. Automaton has 13029 states and 19355 transitions. Word has length 125 [2024-11-09 07:22:44,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:22:44,257 INFO L471 AbstractCegarLoop]: Abstraction has 13029 states and 19355 transitions. [2024-11-09 07:22:44,257 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 07:22:44,257 INFO L276 IsEmpty]: Start isEmpty. Operand 13029 states and 19355 transitions. [2024-11-09 07:22:44,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2024-11-09 07:22:44,287 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:22:44,288 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 07:22:44,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 07:22:44,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fca8be-0389-4a8b-96d3-0d660e4f4069/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-09 07:22:44,494 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:22:44,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:22:44,494 INFO L85 PathProgramCache]: Analyzing trace with hash 204045598, now seen corresponding path program 1 times [2024-11-09 07:22:44,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:22:44,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499111497] [2024-11-09 07:22:44,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:22:44,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:22:44,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:22:44,569 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-11-09 07:22:44,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:22:44,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499111497] [2024-11-09 07:22:44,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499111497] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:22:44,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:22:44,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 07:22:44,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124793042] [2024-11-09 07:22:44,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:22:44,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:22:44,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:22:44,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:22:44,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:22:44,572 INFO L87 Difference]: Start difference. First operand 13029 states and 19355 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 07:22:47,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:22:47,212 INFO L93 Difference]: Finished difference Result 37070 states and 56724 transitions. [2024-11-09 07:22:47,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:22:47,213 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 149 [2024-11-09 07:22:47,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:22:47,299 INFO L225 Difference]: With dead ends: 37070 [2024-11-09 07:22:47,299 INFO L226 Difference]: Without dead ends: 24873 [2024-11-09 07:22:47,332 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 07:22:47,333 INFO L432 NwaCegarLoop]: 266 mSDtfsCounter, 280 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:22:47,333 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 448 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:22:47,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24873 states. [2024-11-09 07:22:49,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24873 to 24757. [2024-11-09 07:22:49,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24757 states, 21019 states have (on average 1.4475950330653218) internal successors, (30427), 21129 states have internal predecessors, (30427), 2583 states have call successors, (2583), 1130 states have call predecessors, (2583), 1153 states have return successors, (3769), 2499 states have call predecessors, (3769), 2580 states have call successors, (3769) [2024-11-09 07:22:50,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24757 states to 24757 states and 36779 transitions. [2024-11-09 07:22:50,051 INFO L78 Accepts]: Start accepts. Automaton has 24757 states and 36779 transitions. Word has length 149 [2024-11-09 07:22:50,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:22:50,051 INFO L471 AbstractCegarLoop]: Abstraction has 24757 states and 36779 transitions. [2024-11-09 07:22:50,051 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 07:22:50,051 INFO L276 IsEmpty]: Start isEmpty. Operand 24757 states and 36779 transitions. [2024-11-09 07:22:50,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2024-11-09 07:22:50,092 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:22:50,092 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 07:22:50,092 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-09 07:22:50,093 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:22:50,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:22:50,093 INFO L85 PathProgramCache]: Analyzing trace with hash -57639081, now seen corresponding path program 1 times [2024-11-09 07:22:50,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:22:50,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882145225] [2024-11-09 07:22:50,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:22:50,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:22:50,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:22:50,178 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-11-09 07:22:50,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:22:50,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882145225] [2024-11-09 07:22:50,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882145225] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:22:50,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:22:50,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 07:22:50,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996870408] [2024-11-09 07:22:50,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:22:50,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:22:50,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:22:50,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:22:50,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:22:50,181 INFO L87 Difference]: Start difference. First operand 24757 states and 36779 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 07:22:55,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:22:55,443 INFO L93 Difference]: Finished difference Result 71902 states and 109380 transitions. [2024-11-09 07:22:55,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:22:55,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 149 [2024-11-09 07:22:55,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:22:55,575 INFO L225 Difference]: With dead ends: 71902 [2024-11-09 07:22:55,575 INFO L226 Difference]: Without dead ends: 47977 [2024-11-09 07:22:55,626 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 07:22:55,627 INFO L432 NwaCegarLoop]: 266 mSDtfsCounter, 282 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:22:55,627 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 448 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:22:55,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47977 states. [2024-11-09 07:23:01,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47977 to 47749. [2024-11-09 07:23:01,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47749 states, 40699 states have (on average 1.4418781788250326) internal successors, (58683), 40905 states have internal predecessors, (58683), 4871 states have call successors, (4871), 2154 states have call predecessors, (4871), 2177 states have return successors, (7081), 4691 states have call predecessors, (7081), 4868 states have call successors, (7081) [2024-11-09 07:23:01,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47749 states to 47749 states and 70635 transitions. [2024-11-09 07:23:01,825 INFO L78 Accepts]: Start accepts. Automaton has 47749 states and 70635 transitions. Word has length 149 [2024-11-09 07:23:01,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:23:01,825 INFO L471 AbstractCegarLoop]: Abstraction has 47749 states and 70635 transitions. [2024-11-09 07:23:01,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 07:23:01,826 INFO L276 IsEmpty]: Start isEmpty. Operand 47749 states and 70635 transitions. [2024-11-09 07:23:01,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2024-11-09 07:23:01,925 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:23:01,926 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 07:23:01,926 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-09 07:23:01,926 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:23:01,926 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:23:01,927 INFO L85 PathProgramCache]: Analyzing trace with hash -254902944, now seen corresponding path program 1 times [2024-11-09 07:23:01,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:23:01,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588419259] [2024-11-09 07:23:01,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:23:01,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:23:01,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:23:02,024 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-11-09 07:23:02,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:23:02,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588419259] [2024-11-09 07:23:02,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588419259] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:23:02,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:23:02,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 07:23:02,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143909735] [2024-11-09 07:23:02,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:23:02,026 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:23:02,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:23:02,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:23:02,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:23:02,027 INFO L87 Difference]: Start difference. First operand 47749 states and 70635 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 07:23:13,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:23:13,678 INFO L93 Difference]: Finished difference Result 140174 states and 211572 transitions. [2024-11-09 07:23:13,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:23:13,678 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 149 [2024-11-09 07:23:13,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:23:14,037 INFO L225 Difference]: With dead ends: 140174 [2024-11-09 07:23:14,037 INFO L226 Difference]: Without dead ends: 93257 [2024-11-09 07:23:14,190 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 07:23:14,190 INFO L432 NwaCegarLoop]: 266 mSDtfsCounter, 285 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:23:14,192 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 448 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:23:14,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93257 states.