./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.14.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_a991c7bd-d3b9-44e3-a3cd-955b8f95b6e5/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a991c7bd-d3b9-44e3-a3cd-955b8f95b6e5/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a991c7bd-d3b9-44e3-a3cd-955b8f95b6e5/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a991c7bd-d3b9-44e3-a3cd-955b8f95b6e5/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.14.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a991c7bd-d3b9-44e3-a3cd-955b8f95b6e5/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a991c7bd-d3b9-44e3-a3cd-955b8f95b6e5/bin/utaipan-verify-NcY6lQBIFX --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 a6e26dc8018dcf216dd711848cc7425da3593cca9604197466413681bb8c438e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 01:03:00,893 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 01:03:00,981 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a991c7bd-d3b9-44e3-a3cd-955b8f95b6e5/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 01:03:00,997 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 01:03:00,998 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 01:03:01,050 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 01:03:01,062 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 01:03:01,063 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 01:03:01,064 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 01:03:01,065 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 01:03:01,066 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 01:03:01,066 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 01:03:01,068 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 01:03:01,072 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 01:03:01,072 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 01:03:01,073 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 01:03:01,074 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 01:03:01,080 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 01:03:01,081 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 01:03:01,082 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 01:03:01,082 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 01:03:01,083 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 01:03:01,084 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 01:03:01,084 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 01:03:01,085 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 01:03:01,085 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 01:03:01,086 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 01:03:01,086 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 01:03:01,087 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 01:03:01,087 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 01:03:01,088 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 01:03:01,089 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 01:03:01,089 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 01:03:01,090 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 01:03:01,090 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 01:03:01,090 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 01:03:01,090 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:03:01,091 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 01:03:01,091 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 01:03:01,091 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 01:03:01,091 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 01:03:01,092 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 01:03:01,092 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 01:03:01,092 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 01:03:01,093 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 01:03:01,093 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_a991c7bd-d3b9-44e3-a3cd-955b8f95b6e5/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a991c7bd-d3b9-44e3-a3cd-955b8f95b6e5/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6e26dc8018dcf216dd711848cc7425da3593cca9604197466413681bb8c438e [2023-11-12 01:03:01,368 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 01:03:01,400 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 01:03:01,403 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 01:03:01,404 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 01:03:01,404 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 01:03:01,407 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a991c7bd-d3b9-44e3-a3cd-955b8f95b6e5/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.14.cil.c [2023-11-12 01:03:04,485 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 01:03:04,854 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 01:03:04,855 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a991c7bd-d3b9-44e3-a3cd-955b8f95b6e5/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.14.cil.c [2023-11-12 01:03:04,884 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a991c7bd-d3b9-44e3-a3cd-955b8f95b6e5/bin/utaipan-verify-NcY6lQBIFX/data/91ae08f08/f50cd32ae5f942359f7d09619cc42dfc/FLAGb2d7378e9 [2023-11-12 01:03:04,899 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a991c7bd-d3b9-44e3-a3cd-955b8f95b6e5/bin/utaipan-verify-NcY6lQBIFX/data/91ae08f08/f50cd32ae5f942359f7d09619cc42dfc [2023-11-12 01:03:04,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 01:03:04,907 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 01:03:04,909 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 01:03:04,910 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 01:03:04,915 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 01:03:04,916 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:03:04" (1/1) ... [2023-11-12 01:03:04,917 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fd4da65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:04, skipping insertion in model container [2023-11-12 01:03:04,917 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:03:04" (1/1) ... [2023-11-12 01:03:04,985 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 01:03:05,185 WARN L240 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_a991c7bd-d3b9-44e3-a3cd-955b8f95b6e5/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.14.cil.c[914,927] [2023-11-12 01:03:05,288 WARN L240 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_a991c7bd-d3b9-44e3-a3cd-955b8f95b6e5/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.14.cil.c[7115,7128] [2023-11-12 01:03:05,473 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:03:05,494 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 01:03:05,511 WARN L240 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_a991c7bd-d3b9-44e3-a3cd-955b8f95b6e5/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.14.cil.c[914,927] [2023-11-12 01:03:05,542 WARN L240 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_a991c7bd-d3b9-44e3-a3cd-955b8f95b6e5/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.14.cil.c[7115,7128] [2023-11-12 01:03:05,583 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:03:05,612 INFO L206 MainTranslator]: Completed translation [2023-11-12 01:03:05,612 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:05 WrapperNode [2023-11-12 01:03:05,613 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 01:03:05,614 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 01:03:05,614 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 01:03:05,614 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 01:03:05,622 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:05" (1/1) ... [2023-11-12 01:03:05,641 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:05" (1/1) ... [2023-11-12 01:03:05,706 INFO L138 Inliner]: procedures = 77, calls = 94, calls flagged for inlining = 45, calls inlined = 45, statements flattened = 1074 [2023-11-12 01:03:05,706 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 01:03:05,707 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 01:03:05,707 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 01:03:05,708 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 01:03:05,717 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:05" (1/1) ... [2023-11-12 01:03:05,718 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:05" (1/1) ... [2023-11-12 01:03:05,724 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:05" (1/1) ... [2023-11-12 01:03:05,725 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:05" (1/1) ... [2023-11-12 01:03:05,746 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:05" (1/1) ... [2023-11-12 01:03:05,763 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:05" (1/1) ... [2023-11-12 01:03:05,768 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:05" (1/1) ... [2023-11-12 01:03:05,773 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:05" (1/1) ... [2023-11-12 01:03:05,781 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 01:03:05,782 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 01:03:05,782 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 01:03:05,783 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 01:03:05,783 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:05" (1/1) ... [2023-11-12 01:03:05,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:03:05,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a991c7bd-d3b9-44e3-a3cd-955b8f95b6e5/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:03:05,821 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a991c7bd-d3b9-44e3-a3cd-955b8f95b6e5/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 01:03:05,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a991c7bd-d3b9-44e3-a3cd-955b8f95b6e5/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 01:03:05,854 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 01:03:05,855 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-12 01:03:05,855 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-12 01:03:05,855 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2023-11-12 01:03:05,855 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2023-11-12 01:03:05,855 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-11-12 01:03:05,855 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-11-12 01:03:05,856 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-11-12 01:03:05,856 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-11-12 01:03:05,856 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2023-11-12 01:03:05,856 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2023-11-12 01:03:05,856 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-11-12 01:03:05,856 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-11-12 01:03:05,857 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-11-12 01:03:05,857 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-11-12 01:03:05,857 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2023-11-12 01:03:05,861 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2023-11-12 01:03:05,861 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2023-11-12 01:03:05,862 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2023-11-12 01:03:05,862 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2023-11-12 01:03:05,863 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2023-11-12 01:03:05,863 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-11-12 01:03:05,864 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-11-12 01:03:05,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 01:03:05,864 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-11-12 01:03:05,864 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-11-12 01:03:05,869 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2023-11-12 01:03:05,869 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2023-11-12 01:03:05,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 01:03:05,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 01:03:05,869 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-11-12 01:03:05,870 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-11-12 01:03:05,870 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2023-11-12 01:03:05,871 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2023-11-12 01:03:06,018 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 01:03:06,027 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 01:03:07,123 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 01:03:07,820 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 01:03:07,820 INFO L302 CfgBuilder]: Removed 19 assume(true) statements. [2023-11-12 01:03:07,825 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:03:07 BoogieIcfgContainer [2023-11-12 01:03:07,825 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 01:03:07,828 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 01:03:07,829 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 01:03:07,832 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 01:03:07,833 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 01:03:04" (1/3) ... [2023-11-12 01:03:07,834 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@751763b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:03:07, skipping insertion in model container [2023-11-12 01:03:07,834 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:05" (2/3) ... [2023-11-12 01:03:07,835 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@751763b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:03:07, skipping insertion in model container [2023-11-12 01:03:07,835 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:03:07" (3/3) ... [2023-11-12 01:03:07,837 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.14.cil.c [2023-11-12 01:03:07,857 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 01:03:07,858 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-12 01:03:07,940 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 01:03:07,947 INFO L357 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, mHoare=true, 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;@3266dbdb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 01:03:07,948 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 01:03:07,955 INFO L276 IsEmpty]: Start isEmpty. Operand has 279 states, 219 states have (on average 1.5159817351598173) internal successors, (332), 227 states have internal predecessors, (332), 42 states have call successors, (42), 15 states have call predecessors, (42), 15 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-12 01:03:07,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-12 01:03:07,970 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:03:07,971 INFO L195 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] [2023-11-12 01:03:07,971 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:03:07,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:03:07,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1771307551, now seen corresponding path program 1 times [2023-11-12 01:03:07,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:03:07,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313330549] [2023-11-12 01:03:07,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:07,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:03:08,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:08,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:03:08,428 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:03:08,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313330549] [2023-11-12 01:03:08,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313330549] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:03:08,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:03:08,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 01:03:08,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390987183] [2023-11-12 01:03:08,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:03:08,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:03:08,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:03:08,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:03:08,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:03:08,471 INFO L87 Difference]: Start difference. First operand has 279 states, 219 states have (on average 1.5159817351598173) internal successors, (332), 227 states have internal predecessors, (332), 42 states have call successors, (42), 15 states have call predecessors, (42), 15 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) 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) [2023-11-12 01:03:09,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:03:09,058 INFO L93 Difference]: Finished difference Result 608 states and 903 transitions. [2023-11-12 01:03:09,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 01:03:09,060 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 [2023-11-12 01:03:09,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:03:09,077 INFO L225 Difference]: With dead ends: 608 [2023-11-12 01:03:09,078 INFO L226 Difference]: Without dead ends: 333 [2023-11-12 01:03:09,094 INFO L412 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 [2023-11-12 01:03:09,099 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 462 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 01:03:09,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [462 Valid, 688 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 01:03:09,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2023-11-12 01:03:09,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 326. [2023-11-12 01:03:09,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 254 states have (on average 1.437007874015748) internal successors, (365), 259 states have internal predecessors, (365), 50 states have call successors, (50), 22 states have call predecessors, (50), 20 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2023-11-12 01:03:09,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 461 transitions. [2023-11-12 01:03:09,237 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 461 transitions. Word has length 45 [2023-11-12 01:03:09,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:03:09,238 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 461 transitions. [2023-11-12 01:03:09,238 INFO L496 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) [2023-11-12 01:03:09,239 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 461 transitions. [2023-11-12 01:03:09,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-12 01:03:09,243 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:03:09,252 INFO L195 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] [2023-11-12 01:03:09,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 01:03:09,253 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:03:09,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:03:09,253 INFO L85 PathProgramCache]: Analyzing trace with hash -852332928, now seen corresponding path program 1 times [2023-11-12 01:03:09,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:03:09,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561607792] [2023-11-12 01:03:09,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:09,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:03:09,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:09,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:03:09,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:03:09,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561607792] [2023-11-12 01:03:09,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561607792] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:03:09,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:03:09,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 01:03:09,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630394990] [2023-11-12 01:03:09,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:03:09,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 01:03:09,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:03:09,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 01:03:09,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 01:03:09,485 INFO L87 Difference]: Start difference. First operand 326 states and 461 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) [2023-11-12 01:03:10,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:03:10,332 INFO L93 Difference]: Finished difference Result 728 states and 964 transitions. [2023-11-12 01:03:10,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 01:03:10,333 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 [2023-11-12 01:03:10,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:03:10,347 INFO L225 Difference]: With dead ends: 728 [2023-11-12 01:03:10,347 INFO L226 Difference]: Without dead ends: 596 [2023-11-12 01:03:10,350 INFO L412 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 [2023-11-12 01:03:10,351 INFO L413 NwaCegarLoop]: 450 mSDtfsCounter, 946 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 950 SdHoareTripleChecker+Valid, 1156 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 01:03:10,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [950 Valid, 1156 Invalid, 884 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [269 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 01:03:10,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2023-11-12 01:03:10,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 512. [2023-11-12 01:03:10,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 386 states have (on average 1.3601036269430051) internal successors, (525), 392 states have internal predecessors, (525), 77 states have call successors, (77), 45 states have call predecessors, (77), 47 states have return successors, (77), 76 states have call predecessors, (77), 73 states have call successors, (77) [2023-11-12 01:03:10,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 679 transitions. [2023-11-12 01:03:10,444 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 679 transitions. Word has length 45 [2023-11-12 01:03:10,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:03:10,444 INFO L495 AbstractCegarLoop]: Abstraction has 512 states and 679 transitions. [2023-11-12 01:03:10,445 INFO L496 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) [2023-11-12 01:03:10,445 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 679 transitions. [2023-11-12 01:03:10,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-12 01:03:10,456 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:03:10,458 INFO L195 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] [2023-11-12 01:03:10,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 01:03:10,458 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:03:10,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:03:10,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1672266465, now seen corresponding path program 1 times [2023-11-12 01:03:10,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:03:10,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17275895] [2023-11-12 01:03:10,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:10,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:03:10,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:10,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:03:10,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:03:10,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17275895] [2023-11-12 01:03:10,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17275895] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:03:10,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:03:10,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 01:03:10,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882082479] [2023-11-12 01:03:10,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:03:10,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 01:03:10,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:03:10,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 01:03:10,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-12 01:03:10,710 INFO L87 Difference]: Start difference. First operand 512 states and 679 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) [2023-11-12 01:03:11,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:03:11,831 INFO L93 Difference]: Finished difference Result 1028 states and 1295 transitions. [2023-11-12 01:03:11,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 01:03:11,832 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 [2023-11-12 01:03:11,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:03:11,838 INFO L225 Difference]: With dead ends: 1028 [2023-11-12 01:03:11,838 INFO L226 Difference]: Without dead ends: 726 [2023-11-12 01:03:11,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-12 01:03:11,841 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 556 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 1223 SdHoareTripleChecker+Invalid, 1193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 01:03:11,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 1223 Invalid, 1193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1096 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 01:03:11,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2023-11-12 01:03:11,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 691. [2023-11-12 01:03:11,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 511 states have (on average 1.324853228962818) internal successors, (677), 518 states have internal predecessors, (677), 104 states have call successors, (104), 68 states have call predecessors, (104), 74 states have return successors, (108), 106 states have call predecessors, (108), 100 states have call successors, (108) [2023-11-12 01:03:11,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 889 transitions. [2023-11-12 01:03:11,914 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 889 transitions. Word has length 46 [2023-11-12 01:03:11,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:03:11,915 INFO L495 AbstractCegarLoop]: Abstraction has 691 states and 889 transitions. [2023-11-12 01:03:11,915 INFO L496 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) [2023-11-12 01:03:11,915 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 889 transitions. [2023-11-12 01:03:11,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-12 01:03:11,917 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:03:11,917 INFO L195 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] [2023-11-12 01:03:11,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 01:03:11,918 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:03:11,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:03:11,918 INFO L85 PathProgramCache]: Analyzing trace with hash 381850519, now seen corresponding path program 1 times [2023-11-12 01:03:11,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:03:11,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238523762] [2023-11-12 01:03:11,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:11,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:03:11,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:11,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:03:11,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:03:11,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238523762] [2023-11-12 01:03:11,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238523762] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:03:11,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:03:11,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 01:03:11,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719815492] [2023-11-12 01:03:11,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:03:11,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:03:11,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:03:11,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:03:11,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:03:11,975 INFO L87 Difference]: Start difference. First operand 691 states and 889 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) [2023-11-12 01:03:12,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:03:12,181 INFO L93 Difference]: Finished difference Result 1255 states and 1559 transitions. [2023-11-12 01:03:12,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:03:12,182 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 [2023-11-12 01:03:12,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:03:12,188 INFO L225 Difference]: With dead ends: 1255 [2023-11-12 01:03:12,188 INFO L226 Difference]: Without dead ends: 823 [2023-11-12 01:03:12,190 INFO L412 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 [2023-11-12 01:03:12,191 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 67 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:03:12,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 655 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:03:12,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2023-11-12 01:03:12,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 718. [2023-11-12 01:03:12,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 534 states have (on average 1.3146067415730338) internal successors, (702), 541 states have internal predecessors, (702), 106 states have call successors, (106), 70 states have call predecessors, (106), 76 states have return successors, (110), 108 states have call predecessors, (110), 102 states have call successors, (110) [2023-11-12 01:03:12,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 918 transitions. [2023-11-12 01:03:12,290 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 918 transitions. Word has length 47 [2023-11-12 01:03:12,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:03:12,292 INFO L495 AbstractCegarLoop]: Abstraction has 718 states and 918 transitions. [2023-11-12 01:03:12,292 INFO L496 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) [2023-11-12 01:03:12,292 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 918 transitions. [2023-11-12 01:03:12,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-12 01:03:12,294 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:03:12,294 INFO L195 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] [2023-11-12 01:03:12,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 01:03:12,295 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:03:12,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:03:12,296 INFO L85 PathProgramCache]: Analyzing trace with hash 2018211043, now seen corresponding path program 1 times [2023-11-12 01:03:12,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:03:12,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129906751] [2023-11-12 01:03:12,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:12,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:03:12,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:12,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 01:03:12,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:03:12,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129906751] [2023-11-12 01:03:12,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129906751] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:03:12,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:03:12,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 01:03:12,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657517402] [2023-11-12 01:03:12,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:03:12,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:03:12,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:03:12,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:03:12,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:03:12,390 INFO L87 Difference]: Start difference. First operand 718 states and 918 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) [2023-11-12 01:03:12,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:03:12,560 INFO L93 Difference]: Finished difference Result 908 states and 1139 transitions. [2023-11-12 01:03:12,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:03:12,561 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 [2023-11-12 01:03:12,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:03:12,566 INFO L225 Difference]: With dead ends: 908 [2023-11-12 01:03:12,567 INFO L226 Difference]: Without dead ends: 635 [2023-11-12 01:03:12,568 INFO L412 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 [2023-11-12 01:03:12,572 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 367 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 406 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 [2023-11-12 01:03:12,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 406 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:03:12,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2023-11-12 01:03:12,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 526. [2023-11-12 01:03:12,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 394 states have (on average 1.3197969543147208) internal successors, (520), 399 states have internal predecessors, (520), 82 states have call successors, (82), 50 states have call predecessors, (82), 48 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-11-12 01:03:12,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 680 transitions. [2023-11-12 01:03:12,632 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 680 transitions. Word has length 53 [2023-11-12 01:03:12,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:03:12,637 INFO L495 AbstractCegarLoop]: Abstraction has 526 states and 680 transitions. [2023-11-12 01:03:12,637 INFO L496 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) [2023-11-12 01:03:12,638 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 680 transitions. [2023-11-12 01:03:12,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-12 01:03:12,639 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:03:12,640 INFO L195 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] [2023-11-12 01:03:12,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 01:03:12,642 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:03:12,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:03:12,642 INFO L85 PathProgramCache]: Analyzing trace with hash 776466237, now seen corresponding path program 1 times [2023-11-12 01:03:12,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:03:12,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922416314] [2023-11-12 01:03:12,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:12,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:03:12,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:12,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:03:12,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:03:12,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922416314] [2023-11-12 01:03:12,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922416314] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:03:12,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:03:12,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 01:03:12,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730479883] [2023-11-12 01:03:12,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:03:12,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:03:12,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:03:12,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:03:12,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:03:12,743 INFO L87 Difference]: Start difference. First operand 526 states and 680 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) [2023-11-12 01:03:13,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:03:13,123 INFO L93 Difference]: Finished difference Result 629 states and 796 transitions. [2023-11-12 01:03:13,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 01:03:13,124 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 [2023-11-12 01:03:13,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:03:13,128 INFO L225 Difference]: With dead ends: 629 [2023-11-12 01:03:13,129 INFO L226 Difference]: Without dead ends: 626 [2023-11-12 01:03:13,129 INFO L412 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 [2023-11-12 01:03:13,130 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 667 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 01:03:13,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [667 Valid, 377 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 01:03:13,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2023-11-12 01:03:13,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 525. [2023-11-12 01:03:13,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 394 states have (on average 1.3121827411167513) internal successors, (517), 398 states have internal predecessors, (517), 81 states have call successors, (81), 50 states have call predecessors, (81), 48 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-11-12 01:03:13,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 676 transitions. [2023-11-12 01:03:13,188 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 676 transitions. Word has length 54 [2023-11-12 01:03:13,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:03:13,189 INFO L495 AbstractCegarLoop]: Abstraction has 525 states and 676 transitions. [2023-11-12 01:03:13,189 INFO L496 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) [2023-11-12 01:03:13,189 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 676 transitions. [2023-11-12 01:03:13,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-12 01:03:13,191 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:03:13,191 INFO L195 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] [2023-11-12 01:03:13,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 01:03:13,192 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:03:13,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:03:13,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1700812928, now seen corresponding path program 1 times [2023-11-12 01:03:13,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:03:13,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745755168] [2023-11-12 01:03:13,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:13,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:03:13,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:13,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:03:13,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:03:13,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745755168] [2023-11-12 01:03:13,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745755168] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:03:13,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410303126] [2023-11-12 01:03:13,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:13,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:03:13,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a991c7bd-d3b9-44e3-a3cd-955b8f95b6e5/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:03:13,337 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a991c7bd-d3b9-44e3-a3cd-955b8f95b6e5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:03:13,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a991c7bd-d3b9-44e3-a3cd-955b8f95b6e5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 01:03:13,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:13,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 01:03:13,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:03:13,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:03:13,727 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:03:13,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:03:13,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410303126] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:03:13,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [701320243] [2023-11-12 01:03:13,822 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-11-12 01:03:13,822 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:03:13,826 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:03:13,832 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:03:13,832 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:03:23,802 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 211 for LOIs [2023-11-12 01:03:23,945 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 207 for LOIs [2023-11-12 01:03:24,060 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 215 for LOIs [2023-11-12 01:03:26,225 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 211 for LOIs [2023-11-12 01:03:26,574 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 211 for LOIs [2023-11-12 01:03:26,922 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 211 for LOIs [2023-11-12 01:03:27,064 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 218 for LOIs [2023-11-12 01:03:27,188 INFO L180 IcfgInterpreter]: Interpretation finished