./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48a4682-6c37-4f54-a415-e6e4e4de6b2a/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48a4682-6c37-4f54-a415-e6e4e4de6b2a/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48a4682-6c37-4f54-a415-e6e4e4de6b2a/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48a4682-6c37-4f54-a415-e6e4e4de6b2a/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48a4682-6c37-4f54-a415-e6e4e4de6b2a/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48a4682-6c37-4f54-a415-e6e4e4de6b2a/bin/utaipan-verify-DbMuA5NWw2 --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 7889f6823684efa4d90d392ed393927ee5c2d2eb45f6dbf47b7c030213ef334f --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:28:53,552 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:28:53,654 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48a4682-6c37-4f54-a415-e6e4e4de6b2a/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:28:53,658 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:28:53,659 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:28:53,695 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:28:53,695 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:28:53,696 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:28:53,698 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:28:53,699 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:28:53,699 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:28:53,701 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:28:53,701 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:28:53,702 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:28:53,704 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:28:53,704 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:28:53,705 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:28:53,705 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:28:53,705 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:28:53,706 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:28:53,706 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:28:53,707 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:28:53,708 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:28:53,708 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:28:53,709 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:28:53,709 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:28:53,710 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:28:53,710 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:28:53,710 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:28:53,711 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:28:53,711 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:28:53,712 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:28:53,712 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:28:53,713 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:28:53,713 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:28:53,713 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:28:53,714 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:28:53,714 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:28:53,715 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:28:53,715 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:28:53,715 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:28:53,716 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:28:53,716 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:28:53,717 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:28:53,717 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:28:53,718 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:28:53,718 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:28:53,718 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_d48a4682-6c37-4f54-a415-e6e4e4de6b2a/bin/utaipan-verify-DbMuA5NWw2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48a4682-6c37-4f54-a415-e6e4e4de6b2a/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7889f6823684efa4d90d392ed393927ee5c2d2eb45f6dbf47b7c030213ef334f [2024-11-02 12:28:54,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:28:54,089 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:28:54,092 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:28:54,094 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:28:54,094 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:28:54,096 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48a4682-6c37-4f54-a415-e6e4e4de6b2a/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-1.c Unable to find full path for "g++" [2024-11-02 12:28:56,461 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:28:56,752 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:28:56,756 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48a4682-6c37-4f54-a415-e6e4e4de6b2a/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-1.c [2024-11-02 12:28:56,774 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48a4682-6c37-4f54-a415-e6e4e4de6b2a/bin/utaipan-verify-DbMuA5NWw2/data/17276411e/237fec6cc36a403b85d03c315b3cd381/FLAGddcfe9abe [2024-11-02 12:28:56,794 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48a4682-6c37-4f54-a415-e6e4e4de6b2a/bin/utaipan-verify-DbMuA5NWw2/data/17276411e/237fec6cc36a403b85d03c315b3cd381 [2024-11-02 12:28:56,798 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:28:56,801 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:28:56,804 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:28:56,804 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:28:56,810 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:28:56,811 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:28:56" (1/1) ... [2024-11-02 12:28:56,814 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62feffe7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:56, skipping insertion in model container [2024-11-02 12:28:56,814 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:28:56" (1/1) ... [2024-11-02 12:28:56,878 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:28:57,132 WARN L251 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_d48a4682-6c37-4f54-a415-e6e4e4de6b2a/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-1.c[914,927] [2024-11-02 12:28:57,224 WARN L251 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_d48a4682-6c37-4f54-a415-e6e4e4de6b2a/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-1.c[7115,7128] [2024-11-02 12:28:57,350 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:28:57,367 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:28:57,381 WARN L251 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_d48a4682-6c37-4f54-a415-e6e4e4de6b2a/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-1.c[914,927] [2024-11-02 12:28:57,417 WARN L251 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_d48a4682-6c37-4f54-a415-e6e4e4de6b2a/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-1.c[7115,7128] [2024-11-02 12:28:57,508 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:28:57,543 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:28:57,544 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:57 WrapperNode [2024-11-02 12:28:57,544 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:28:57,546 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:28:57,546 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:28:57,546 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:28:57,555 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:57" (1/1) ... [2024-11-02 12:28:57,570 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:57" (1/1) ... [2024-11-02 12:28:57,624 INFO L138 Inliner]: procedures = 69, calls = 81, calls flagged for inlining = 38, calls inlined = 38, statements flattened = 828 [2024-11-02 12:28:57,628 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:28:57,629 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:28:57,629 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:28:57,629 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:28:57,643 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:57" (1/1) ... [2024-11-02 12:28:57,644 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:57" (1/1) ... [2024-11-02 12:28:57,649 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:57" (1/1) ... [2024-11-02 12:28:57,650 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:57" (1/1) ... [2024-11-02 12:28:57,663 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:57" (1/1) ... [2024-11-02 12:28:57,675 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:57" (1/1) ... [2024-11-02 12:28:57,679 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:57" (1/1) ... [2024-11-02 12:28:57,685 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:57" (1/1) ... [2024-11-02 12:28:57,690 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:28:57,692 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:28:57,692 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:28:57,692 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:28:57,693 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:57" (1/1) ... [2024-11-02 12:28:57,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:28:57,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48a4682-6c37-4f54-a415-e6e4e4de6b2a/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:28:57,752 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48a4682-6c37-4f54-a415-e6e4e4de6b2a/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:28:57,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48a4682-6c37-4f54-a415-e6e4e4de6b2a/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:28:57,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:28:57,792 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-02 12:28:57,792 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-02 12:28:57,793 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2024-11-02 12:28:57,793 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2024-11-02 12:28:57,793 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2024-11-02 12:28:57,793 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2024-11-02 12:28:57,793 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2024-11-02 12:28:57,794 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2024-11-02 12:28:57,794 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2024-11-02 12:28:57,813 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2024-11-02 12:28:57,814 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2024-11-02 12:28:57,814 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2024-11-02 12:28:57,815 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2024-11-02 12:28:57,816 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2024-11-02 12:28:57,816 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2024-11-02 12:28:57,816 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2024-11-02 12:28:57,816 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2024-11-02 12:28:57,816 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2024-11-02 12:28:57,816 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2024-11-02 12:28:57,817 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2024-11-02 12:28:57,817 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2024-11-02 12:28:57,817 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2024-11-02 12:28:57,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:28:57,817 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2024-11-02 12:28:57,817 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2024-11-02 12:28:57,817 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2024-11-02 12:28:57,817 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2024-11-02 12:28:57,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:28:57,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:28:57,818 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2024-11-02 12:28:57,818 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2024-11-02 12:28:57,965 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:28:57,967 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:28:58,945 INFO L? ?]: Removed 103 outVars from TransFormulas that were not future-live. [2024-11-02 12:28:58,945 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:28:59,476 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:28:59,476 INFO L316 CfgBuilder]: Removed 15 assume(true) statements. [2024-11-02 12:28:59,477 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:28:59 BoogieIcfgContainer [2024-11-02 12:28:59,477 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:28:59,481 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:28:59,481 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:28:59,485 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:28:59,485 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:28:56" (1/3) ... [2024-11-02 12:28:59,486 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@770e0034 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:28:59, skipping insertion in model container [2024-11-02 12:28:59,487 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:57" (2/3) ... [2024-11-02 12:28:59,488 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@770e0034 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:28:59, skipping insertion in model container [2024-11-02 12:28:59,488 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:28:59" (3/3) ... [2024-11-02 12:28:59,490 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.08.cil-1.c [2024-11-02 12:28:59,511 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:28:59,511 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-02 12:28:59,600 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:28:59,609 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;@777ac316, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:28:59,609 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-02 12:28:59,617 INFO L276 IsEmpty]: Start isEmpty. Operand has 225 states, 172 states have (on average 1.5) internal successors, (258), 178 states have internal predecessors, (258), 36 states have call successors, (36), 14 states have call predecessors, (36), 14 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2024-11-02 12:28:59,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-02 12:28:59,630 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:28:59,631 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] [2024-11-02 12:28:59,631 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:28:59,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:59,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1032924709, now seen corresponding path program 1 times [2024-11-02 12:28:59,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:59,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118191565] [2024-11-02 12:28:59,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:59,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:59,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:29:00,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:29:00,112 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:29:00,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118191565] [2024-11-02 12:29:00,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118191565] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:29:00,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:29:00,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:29:00,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397287531] [2024-11-02 12:29:00,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:29:00,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:29:00,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:29:00,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:29:00,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:29:00,187 INFO L87 Difference]: Start difference. First operand has 225 states, 172 states have (on average 1.5) internal successors, (258), 178 states have internal predecessors, (258), 36 states have call successors, (36), 14 states have call predecessors, (36), 14 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) 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) [2024-11-02 12:29:00,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:29:00,749 INFO L93 Difference]: Finished difference Result 501 states and 731 transitions. [2024-11-02 12:29:00,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:29:00,753 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 [2024-11-02 12:29:00,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:29:00,767 INFO L225 Difference]: With dead ends: 501 [2024-11-02 12:29:00,767 INFO L226 Difference]: Without dead ends: 280 [2024-11-02 12:29:00,773 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 [2024-11-02 12:29:00,776 INFO L432 NwaCegarLoop]: 322 mSDtfsCounter, 378 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-02 12:29:00,777 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 554 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-02 12:29:00,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2024-11-02 12:29:00,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 273. [2024-11-02 12:29:00,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 207 states have (on average 1.4057971014492754) internal successors, (291), 211 states have internal predecessors, (291), 44 states have call successors, (44), 21 states have call predecessors, (44), 20 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2024-11-02 12:29:00,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 377 transitions. [2024-11-02 12:29:00,870 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 377 transitions. Word has length 45 [2024-11-02 12:29:00,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:29:00,872 INFO L471 AbstractCegarLoop]: Abstraction has 273 states and 377 transitions. [2024-11-02 12:29:00,873 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) [2024-11-02 12:29:00,873 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 377 transitions. [2024-11-02 12:29:00,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-02 12:29:00,876 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:29:00,876 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] [2024-11-02 12:29:00,877 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:29:00,877 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:29:00,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:29:00,878 INFO L85 PathProgramCache]: Analyzing trace with hash -113950086, now seen corresponding path program 1 times [2024-11-02 12:29:00,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:29:00,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281750488] [2024-11-02 12:29:00,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:29:00,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:29:00,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:29:01,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:29:01,085 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:29:01,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281750488] [2024-11-02 12:29:01,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281750488] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:29:01,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:29:01,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-02 12:29:01,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311158135] [2024-11-02 12:29:01,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:29:01,089 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 12:29:01,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:29:01,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 12:29:01,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:29:01,092 INFO L87 Difference]: Start difference. First operand 273 states and 377 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) [2024-11-02 12:29:02,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:29:02,030 INFO L93 Difference]: Finished difference Result 675 states and 880 transitions. [2024-11-02 12:29:02,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-02 12:29:02,031 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 [2024-11-02 12:29:02,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:29:02,040 INFO L225 Difference]: With dead ends: 675 [2024-11-02 12:29:02,041 INFO L226 Difference]: Without dead ends: 543 [2024-11-02 12:29:02,043 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-02 12:29:02,046 INFO L432 NwaCegarLoop]: 378 mSDtfsCounter, 798 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-02 12:29:02,048 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [802 Valid, 960 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-02 12:29:02,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2024-11-02 12:29:02,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 459. [2024-11-02 12:29:02,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 339 states have (on average 1.3303834808259587) internal successors, (451), 344 states have internal predecessors, (451), 71 states have call successors, (71), 44 states have call predecessors, (71), 47 states have return successors, (73), 72 states have call predecessors, (73), 69 states have call successors, (73) [2024-11-02 12:29:02,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 595 transitions. [2024-11-02 12:29:02,131 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 595 transitions. Word has length 45 [2024-11-02 12:29:02,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:29:02,131 INFO L471 AbstractCegarLoop]: Abstraction has 459 states and 595 transitions. [2024-11-02 12:29:02,132 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) [2024-11-02 12:29:02,132 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 595 transitions. [2024-11-02 12:29:02,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-02 12:29:02,133 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:29:02,134 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] [2024-11-02 12:29:02,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 12:29:02,134 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:29:02,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:29:02,135 INFO L85 PathProgramCache]: Analyzing trace with hash 686651418, now seen corresponding path program 1 times [2024-11-02 12:29:02,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:29:02,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682562833] [2024-11-02 12:29:02,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:29:02,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:29:02,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:29:02,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:29:02,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:29:02,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682562833] [2024-11-02 12:29:02,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682562833] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:29:02,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:29:02,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-02 12:29:02,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361344814] [2024-11-02 12:29:02,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:29:02,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-02 12:29:02,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:29:02,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-02 12:29:02,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-02 12:29:02,440 INFO L87 Difference]: Start difference. First operand 459 states and 595 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) [2024-11-02 12:29:03,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:29:03,462 INFO L93 Difference]: Finished difference Result 975 states and 1211 transitions. [2024-11-02 12:29:03,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-02 12:29:03,463 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 [2024-11-02 12:29:03,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:29:03,468 INFO L225 Difference]: With dead ends: 975 [2024-11-02 12:29:03,469 INFO L226 Difference]: Without dead ends: 673 [2024-11-02 12:29:03,470 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 [2024-11-02 12:29:03,471 INFO L432 NwaCegarLoop]: 179 mSDtfsCounter, 449 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-02 12:29:03,472 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [476 Valid, 821 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-02 12:29:03,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2024-11-02 12:29:03,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 638. [2024-11-02 12:29:03,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 464 states have (on average 1.2995689655172413) internal successors, (603), 470 states have internal predecessors, (603), 98 states have call successors, (98), 67 states have call predecessors, (98), 74 states have return successors, (104), 102 states have call predecessors, (104), 96 states have call successors, (104) [2024-11-02 12:29:03,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 805 transitions. [2024-11-02 12:29:03,551 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 805 transitions. Word has length 46 [2024-11-02 12:29:03,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:29:03,551 INFO L471 AbstractCegarLoop]: Abstraction has 638 states and 805 transitions. [2024-11-02 12:29:03,552 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) [2024-11-02 12:29:03,552 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 805 transitions. [2024-11-02 12:29:03,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-02 12:29:03,558 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:29:03,558 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] [2024-11-02 12:29:03,558 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 12:29:03,559 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:29:03,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:29:03,559 INFO L85 PathProgramCache]: Analyzing trace with hash 494174430, now seen corresponding path program 1 times [2024-11-02 12:29:03,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:29:03,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757785922] [2024-11-02 12:29:03,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:29:03,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:29:03,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:29:03,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:29:03,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:29:03,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757785922] [2024-11-02 12:29:03,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757785922] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:29:03,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:29:03,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:29:03,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837673521] [2024-11-02 12:29:03,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:29:03,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:29:03,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:29:03,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:29:03,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:29:03,666 INFO L87 Difference]: Start difference. First operand 638 states and 805 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) [2024-11-02 12:29:03,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:29:03,957 INFO L93 Difference]: Finished difference Result 1202 states and 1475 transitions. [2024-11-02 12:29:03,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:29:03,958 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 [2024-11-02 12:29:03,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:29:03,966 INFO L225 Difference]: With dead ends: 1202 [2024-11-02 12:29:03,966 INFO L226 Difference]: Without dead ends: 770 [2024-11-02 12:29:03,969 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 [2024-11-02 12:29:03,972 INFO L432 NwaCegarLoop]: 271 mSDtfsCounter, 67 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:29:03,972 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 511 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:29:03,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2024-11-02 12:29:04,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 665. [2024-11-02 12:29:04,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 487 states have (on average 1.2895277207392197) internal successors, (628), 493 states have internal predecessors, (628), 100 states have call successors, (100), 69 states have call predecessors, (100), 76 states have return successors, (106), 104 states have call predecessors, (106), 98 states have call successors, (106) [2024-11-02 12:29:04,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 834 transitions. [2024-11-02 12:29:04,075 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 834 transitions. Word has length 47 [2024-11-02 12:29:04,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:29:04,078 INFO L471 AbstractCegarLoop]: Abstraction has 665 states and 834 transitions. [2024-11-02 12:29:04,078 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) [2024-11-02 12:29:04,078 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 834 transitions. [2024-11-02 12:29:04,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-02 12:29:04,084 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:29:04,084 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] [2024-11-02 12:29:04,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 12:29:04,084 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:29:04,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:29:04,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1909808419, now seen corresponding path program 1 times [2024-11-02 12:29:04,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:29:04,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741364903] [2024-11-02 12:29:04,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:29:04,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:29:04,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:29:04,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:29:04,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:29:04,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741364903] [2024-11-02 12:29:04,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741364903] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:29:04,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:29:04,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:29:04,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737447924] [2024-11-02 12:29:04,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:29:04,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:29:04,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:29:04,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:29:04,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:29:04,183 INFO L87 Difference]: Start difference. First operand 665 states and 834 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) [2024-11-02 12:29:04,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:29:04,347 INFO L93 Difference]: Finished difference Result 855 states and 1055 transitions. [2024-11-02 12:29:04,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:29:04,348 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 [2024-11-02 12:29:04,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:29:04,353 INFO L225 Difference]: With dead ends: 855 [2024-11-02 12:29:04,353 INFO L226 Difference]: Without dead ends: 582 [2024-11-02 12:29:04,354 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 [2024-11-02 12:29:04,359 INFO L432 NwaCegarLoop]: 273 mSDtfsCounter, 283 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:29:04,359 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 334 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:29:04,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2024-11-02 12:29:04,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 473. [2024-11-02 12:29:04,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 347 states have (on average 1.2853025936599423) internal successors, (446), 351 states have internal predecessors, (446), 76 states have call successors, (76), 49 states have call predecessors, (76), 48 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) [2024-11-02 12:29:04,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 596 transitions. [2024-11-02 12:29:04,435 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 596 transitions. Word has length 53 [2024-11-02 12:29:04,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:29:04,436 INFO L471 AbstractCegarLoop]: Abstraction has 473 states and 596 transitions. [2024-11-02 12:29:04,436 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) [2024-11-02 12:29:04,437 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 596 transitions. [2024-11-02 12:29:04,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-02 12:29:04,438 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:29:04,438 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] [2024-11-02 12:29:04,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-02 12:29:04,443 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:29:04,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:29:04,444 INFO L85 PathProgramCache]: Analyzing trace with hash 210833464, now seen corresponding path program 1 times [2024-11-02 12:29:04,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:29:04,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085133206] [2024-11-02 12:29:04,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:29:04,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:29:04,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:29:04,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:29:04,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:29:04,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085133206] [2024-11-02 12:29:04,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085133206] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:29:04,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:29:04,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:29:04,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144000457] [2024-11-02 12:29:04,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:29:04,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:29:04,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:29:04,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:29:04,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:29:04,558 INFO L87 Difference]: Start difference. First operand 473 states and 596 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) [2024-11-02 12:29:04,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:29:04,965 INFO L93 Difference]: Finished difference Result 576 states and 712 transitions. [2024-11-02 12:29:04,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:29:04,966 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 [2024-11-02 12:29:04,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:29:04,970 INFO L225 Difference]: With dead ends: 576 [2024-11-02 12:29:04,970 INFO L226 Difference]: Without dead ends: 573 [2024-11-02 12:29:04,971 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 [2024-11-02 12:29:04,971 INFO L432 NwaCegarLoop]: 265 mSDtfsCounter, 519 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 12:29:04,972 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 305 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 12:29:04,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2024-11-02 12:29:05,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 472. [2024-11-02 12:29:05,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 347 states have (on average 1.276657060518732) internal successors, (443), 350 states have internal predecessors, (443), 75 states have call successors, (75), 49 states have call predecessors, (75), 48 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) [2024-11-02 12:29:05,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 592 transitions. [2024-11-02 12:29:05,045 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 592 transitions. Word has length 54 [2024-11-02 12:29:05,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:29:05,045 INFO L471 AbstractCegarLoop]: Abstraction has 472 states and 592 transitions. [2024-11-02 12:29:05,046 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) [2024-11-02 12:29:05,046 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 592 transitions. [2024-11-02 12:29:05,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-02 12:29:05,047 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:29:05,047 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] [2024-11-02 12:29:05,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-02 12:29:05,048 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:29:05,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:29:05,048 INFO L85 PathProgramCache]: Analyzing trace with hash -2055246137, now seen corresponding path program 1 times [2024-11-02 12:29:05,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:29:05,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456845565] [2024-11-02 12:29:05,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:29:05,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:29:05,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:29:05,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:29:05,241 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:29:05,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456845565] [2024-11-02 12:29:05,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456845565] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:29:05,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796875750] [2024-11-02 12:29:05,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:29:05,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:29:05,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48a4682-6c37-4f54-a415-e6e4e4de6b2a/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:29:05,245 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48a4682-6c37-4f54-a415-e6e4e4de6b2a/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:29:05,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48a4682-6c37-4f54-a415-e6e4e4de6b2a/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:29:05,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:29:05,379 INFO L255 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-02 12:29:05,386 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:29:05,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:29:05,687 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:29:05,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:29:05,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796875750] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:29:05,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1117863716] [2024-11-02 12:29:05,832 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2024-11-02 12:29:05,833 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:29:05,844 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:29:05,855 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:29:05,858 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:29:12,800 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 171 for LOIs [2024-11-02 12:29:12,899 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 167 for LOIs [2024-11-02 12:29:12,994 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 175 for LOIs [2024-11-02 12:29:14,102 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 171 for LOIs [2024-11-02 12:29:14,351 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 171 for LOIs [2024-11-02 12:29:14,554 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 171 for LOIs [2024-11-02 12:29:14,614 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 178 for LOIs [2024-11-02 12:29:14,672 INFO L180 IcfgInterpreter]: Interpretation finished