./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/bist_cell.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_3d8bff86-ff98-41c5-9071-6bf616fb055d/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8bff86-ff98-41c5-9071-6bf616fb055d/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_3d8bff86-ff98-41c5-9071-6bf616fb055d/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8bff86-ff98-41c5-9071-6bf616fb055d/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/bist_cell.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8bff86-ff98-41c5-9071-6bf616fb055d/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_3d8bff86-ff98-41c5-9071-6bf616fb055d/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 de455e90ef2ae1a82fb7a87bbcdb07831c7ef68e47976e1b2868a3e9de47a0a2 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:51:30,784 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:51:30,896 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8bff86-ff98-41c5-9071-6bf616fb055d/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:51:30,904 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:51:30,905 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:51:30,951 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:51:30,952 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:51:30,952 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:51:30,953 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:51:30,958 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:51:30,959 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:51:30,960 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:51:30,961 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:51:30,963 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:51:30,963 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:51:30,964 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:51:30,964 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:51:30,965 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:51:30,965 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:51:30,966 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:51:30,966 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:51:30,967 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:51:30,968 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:51:30,968 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:51:30,969 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:51:30,969 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:51:30,970 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:51:30,970 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:51:30,971 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:51:30,971 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:51:30,973 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:51:30,973 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:51:30,973 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:51:30,974 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:51:30,974 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:51:30,974 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:51:30,974 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:51:30,975 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:51:30,975 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:51:30,975 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:51:30,976 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:51:31,005 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:51:31,006 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:51:31,007 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:51:31,007 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:51:31,007 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_3d8bff86-ff98-41c5-9071-6bf616fb055d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8bff86-ff98-41c5-9071-6bf616fb055d/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de455e90ef2ae1a82fb7a87bbcdb07831c7ef68e47976e1b2868a3e9de47a0a2 [2023-11-12 00:51:31,366 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:51:31,401 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:51:31,404 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:51:31,406 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:51:31,406 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:51:31,409 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8bff86-ff98-41c5-9071-6bf616fb055d/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/systemc/bist_cell.cil.c [2023-11-12 00:51:34,653 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:51:34,925 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:51:34,927 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8bff86-ff98-41c5-9071-6bf616fb055d/sv-benchmarks/c/systemc/bist_cell.cil.c [2023-11-12 00:51:34,946 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8bff86-ff98-41c5-9071-6bf616fb055d/bin/utaipan-verify-NcY6lQBIFX/data/1210086c1/5aa3e2bd800943249416225421bf6861/FLAGb5e8f485f [2023-11-12 00:51:34,970 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8bff86-ff98-41c5-9071-6bf616fb055d/bin/utaipan-verify-NcY6lQBIFX/data/1210086c1/5aa3e2bd800943249416225421bf6861 [2023-11-12 00:51:34,978 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:51:35,005 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:51:35,010 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:51:35,010 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:51:35,018 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:51:35,019 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:51:34" (1/1) ... [2023-11-12 00:51:35,020 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69751822 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:35, skipping insertion in model container [2023-11-12 00:51:35,021 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:51:34" (1/1) ... [2023-11-12 00:51:35,065 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:51:35,239 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_3d8bff86-ff98-41c5-9071-6bf616fb055d/sv-benchmarks/c/systemc/bist_cell.cil.c[639,652] [2023-11-12 00:51:35,299 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:51:35,314 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:51:35,328 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_3d8bff86-ff98-41c5-9071-6bf616fb055d/sv-benchmarks/c/systemc/bist_cell.cil.c[639,652] [2023-11-12 00:51:35,363 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:51:35,386 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:51:35,386 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:35 WrapperNode [2023-11-12 00:51:35,387 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:51:35,388 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:51:35,388 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:51:35,389 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:51:35,398 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:35" (1/1) ... [2023-11-12 00:51:35,408 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:35" (1/1) ... [2023-11-12 00:51:35,441 INFO L138 Inliner]: procedures = 30, calls = 30, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 229 [2023-11-12 00:51:35,442 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:51:35,443 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:51:35,443 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:51:35,444 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:51:35,454 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:35" (1/1) ... [2023-11-12 00:51:35,455 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:35" (1/1) ... [2023-11-12 00:51:35,458 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:35" (1/1) ... [2023-11-12 00:51:35,459 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:35" (1/1) ... [2023-11-12 00:51:35,466 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:35" (1/1) ... [2023-11-12 00:51:35,473 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:35" (1/1) ... [2023-11-12 00:51:35,476 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:35" (1/1) ... [2023-11-12 00:51:35,478 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:35" (1/1) ... [2023-11-12 00:51:35,482 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:51:35,483 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:51:35,484 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:51:35,484 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:51:35,485 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:35" (1/1) ... [2023-11-12 00:51:35,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:51:35,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8bff86-ff98-41c5-9071-6bf616fb055d/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:51:35,531 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8bff86-ff98-41c5-9071-6bf616fb055d/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:51:35,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8bff86-ff98-41c5-9071-6bf616fb055d/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:51:35,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:51:35,600 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-12 00:51:35,600 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-12 00:51:35,601 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-12 00:51:35,601 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-12 00:51:35,601 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-12 00:51:35,601 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-12 00:51:35,601 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-12 00:51:35,602 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-12 00:51:35,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:51:35,602 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-12 00:51:35,602 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-12 00:51:35,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:51:35,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:51:35,719 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:51:35,722 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:51:36,140 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:51:36,430 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:51:36,431 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 00:51:36,434 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:51:36 BoogieIcfgContainer [2023-11-12 00:51:36,434 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:51:36,438 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:51:36,438 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:51:36,442 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:51:36,443 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:51:34" (1/3) ... [2023-11-12 00:51:36,444 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fb49002 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:51:36, skipping insertion in model container [2023-11-12 00:51:36,445 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:35" (2/3) ... [2023-11-12 00:51:36,446 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fb49002 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:51:36, skipping insertion in model container [2023-11-12 00:51:36,448 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:51:36" (3/3) ... [2023-11-12 00:51:36,451 INFO L112 eAbstractionObserver]: Analyzing ICFG bist_cell.cil.c [2023-11-12 00:51:36,475 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:51:36,476 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:51:36,560 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:51:36,569 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;@2aad6f34, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:51:36,570 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:51:36,575 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-12 00:51:36,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-12 00:51:36,586 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:36,587 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:51:36,588 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:51:36,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:36,598 INFO L85 PathProgramCache]: Analyzing trace with hash 53522103, now seen corresponding path program 1 times [2023-11-12 00:51:36,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:36,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134824069] [2023-11-12 00:51:36,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:36,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:36,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:37,012 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 00:51:37,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:37,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134824069] [2023-11-12 00:51:37,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134824069] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:51:37,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:51:37,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:51:37,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073615382] [2023-11-12 00:51:37,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:51:37,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 00:51:37,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:37,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 00:51:37,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:51:37,093 INFO L87 Difference]: Start difference. First operand has 37 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-12 00:51:37,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:37,197 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2023-11-12 00:51:37,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 00:51:37,200 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 18 [2023-11-12 00:51:37,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:37,210 INFO L225 Difference]: With dead ends: 68 [2023-11-12 00:51:37,210 INFO L226 Difference]: Without dead ends: 35 [2023-11-12 00:51:37,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:51:37,221 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:51:37,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:51:37,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-12 00:51:37,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-11-12 00:51:37,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-12 00:51:37,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2023-11-12 00:51:37,286 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 18 [2023-11-12 00:51:37,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:37,290 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2023-11-12 00:51:37,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-12 00:51:37,291 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2023-11-12 00:51:37,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-12 00:51:37,295 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:37,297 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:51:37,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:51:37,298 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:51:37,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:37,301 INFO L85 PathProgramCache]: Analyzing trace with hash -553944512, now seen corresponding path program 1 times [2023-11-12 00:51:37,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:37,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592725672] [2023-11-12 00:51:37,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:37,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:37,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:38,324 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 00:51:38,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:38,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592725672] [2023-11-12 00:51:38,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592725672] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:51:38,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172230675] [2023-11-12 00:51:38,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:38,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:51:38,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8bff86-ff98-41c5-9071-6bf616fb055d/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:51:38,329 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8bff86-ff98-41c5-9071-6bf616fb055d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:51:38,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8bff86-ff98-41c5-9071-6bf616fb055d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:51:38,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:38,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-12 00:51:38,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:51:39,105 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:51:39,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:51:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-12 00:51:40,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172230675] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:51:40,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [88778716] [2023-11-12 00:51:40,219 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2023-11-12 00:51:40,220 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:51:40,224 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:51:40,229 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:51:40,230 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:51:45,174 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 17 for LOIs [2023-11-12 00:51:45,187 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 84 for LOIs [2023-11-12 00:51:45,268 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 128 for LOIs [2023-11-12 00:51:45,482 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 17 for LOIs [2023-11-12 00:51:45,488 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 87 for LOIs [2023-11-12 00:51:45,587 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:51:50,317 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '467#(and (not (= ~comp_m1_st~0 0)) (= 0 ~z_val_t~0) (<= 1 |#StackHeapBarrier|) (= ~comp_m1_i~0 0) (= ~d1_val_t~0 1) (not (= ~z_val~0 0)) (= ~b0_val_t~0 1) (= |ULTIMATE.start_stop_simulation_#res#1| 1) (= ~b1_val_t~0 1) (= ~d0_val_t~0 1))' at error location [2023-11-12 00:51:50,317 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:51:50,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:51:50,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2023-11-12 00:51:50,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974197841] [2023-11-12 00:51:50,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:51:50,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-12 00:51:50,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:50,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-12 00:51:50,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1781, Unknown=0, NotChecked=0, Total=1980 [2023-11-12 00:51:50,325 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 17 states, 10 states have (on average 4.0) internal successors, (40), 13 states have internal predecessors, (40), 5 states have call successors, (26), 8 states have call predecessors, (26), 9 states have return successors, (26), 3 states have call predecessors, (26), 5 states have call successors, (26) [2023-11-12 00:51:50,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:50,729 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2023-11-12 00:51:50,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 00:51:50,730 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 10 states have (on average 4.0) internal successors, (40), 13 states have internal predecessors, (40), 5 states have call successors, (26), 8 states have call predecessors, (26), 9 states have return successors, (26), 3 states have call predecessors, (26), 5 states have call successors, (26) Word has length 44 [2023-11-12 00:51:50,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:50,733 INFO L225 Difference]: With dead ends: 79 [2023-11-12 00:51:50,733 INFO L226 Difference]: Without dead ends: 75 [2023-11-12 00:51:50,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=236, Invalid=2020, Unknown=0, NotChecked=0, Total=2256 [2023-11-12 00:51:50,737 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 126 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:51:50,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 103 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:51:50,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-12 00:51:50,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 66. [2023-11-12 00:51:50,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 38 states have internal predecessors, (41), 17 states have call successors, (17), 11 states have call predecessors, (17), 11 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-12 00:51:50,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2023-11-12 00:51:50,756 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 44 [2023-11-12 00:51:50,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:50,757 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2023-11-12 00:51:50,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 10 states have (on average 4.0) internal successors, (40), 13 states have internal predecessors, (40), 5 states have call successors, (26), 8 states have call predecessors, (26), 9 states have return successors, (26), 3 states have call predecessors, (26), 5 states have call successors, (26) [2023-11-12 00:51:50,758 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2023-11-12 00:51:50,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-12 00:51:50,760 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:50,760 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:51:50,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8bff86-ff98-41c5-9071-6bf616fb055d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:51:50,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8bff86-ff98-41c5-9071-6bf616fb055d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-12 00:51:50,968 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:51:50,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:50,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1437494693, now seen corresponding path program 1 times [2023-11-12 00:51:50,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:50,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868467855] [2023-11-12 00:51:50,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:50,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:51,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:54,020 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 00:51:54,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:54,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868467855] [2023-11-12 00:51:54,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868467855] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:51:54,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092014214] [2023-11-12 00:51:54,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:54,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:51:54,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8bff86-ff98-41c5-9071-6bf616fb055d/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:51:54,024 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8bff86-ff98-41c5-9071-6bf616fb055d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:51:54,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8bff86-ff98-41c5-9071-6bf616fb055d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:51:54,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:54,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 75 conjunts are in the unsatisfiable core [2023-11-12 00:51:54,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:51:55,758 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:51:55,758 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:52:06,176 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 00:52:06,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092014214] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:52:06,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1013016656] [2023-11-12 00:52:06,180 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2023-11-12 00:52:06,180 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:52:06,181 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:52:06,181 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:52:06,181 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:52:09,595 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 15 for LOIs [2023-11-12 00:52:09,602 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 82 for LOIs [2023-11-12 00:52:09,641 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 127 for LOIs [2023-11-12 00:52:09,759 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 15 for LOIs [2023-11-12 00:52:09,763 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 85 for LOIs [2023-11-12 00:52:09,804 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:52:14,326 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1064#(and (not (= ~comp_m1_st~0 0)) (<= 1 |#StackHeapBarrier|) (= ~comp_m1_i~0 0) (= ~d1_val_t~0 1) (not (= ~z_val~0 0)) (= ~b0_val_t~0 1) (= |ULTIMATE.start_stop_simulation_#res#1| 1) (= ~b1_val_t~0 1) (= ~d0_val_t~0 1))' at error location [2023-11-12 00:52:14,326 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:52:14,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:52:14,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 16, 16] total 51 [2023-11-12 00:52:14,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290059102] [2023-11-12 00:52:14,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:52:14,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-12 00:52:14,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:52:14,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-12 00:52:14,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=5721, Unknown=0, NotChecked=0, Total=6162 [2023-11-12 00:52:14,334 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand has 51 states, 34 states have (on average 1.911764705882353) internal successors, (65), 37 states have internal predecessors, (65), 15 states have call successors, (33), 11 states have call predecessors, (33), 17 states have return successors, (33), 14 states have call predecessors, (33), 15 states have call successors, (33) [2023-11-12 00:52:21,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:52:21,931 INFO L93 Difference]: Finished difference Result 179 states and 207 transitions. [2023-11-12 00:52:21,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-12 00:52:21,932 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 34 states have (on average 1.911764705882353) internal successors, (65), 37 states have internal predecessors, (65), 15 states have call successors, (33), 11 states have call predecessors, (33), 17 states have return successors, (33), 14 states have call predecessors, (33), 15 states have call successors, (33) Word has length 50 [2023-11-12 00:52:21,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:52:21,938 INFO L225 Difference]: With dead ends: 179 [2023-11-12 00:52:21,940 INFO L226 Difference]: Without dead ends: 175 [2023-11-12 00:52:21,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6290 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=2058, Invalid=17682, Unknown=0, NotChecked=0, Total=19740 [2023-11-12 00:52:21,958 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 353 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 1352 mSolverCounterSat, 524 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 1876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 524 IncrementalHoareTripleChecker+Valid, 1352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:52:21,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 379 Invalid, 1876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [524 Valid, 1352 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-12 00:52:21,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-11-12 00:52:22,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 79. [2023-11-12 00:52:22,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 45 states have internal predecessors, (48), 18 states have call successors, (18), 16 states have call predecessors, (18), 16 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-12 00:52:22,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2023-11-12 00:52:22,025 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 50 [2023-11-12 00:52:22,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:52:22,026 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2023-11-12 00:52:22,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 34 states have (on average 1.911764705882353) internal successors, (65), 37 states have internal predecessors, (65), 15 states have call successors, (33), 11 states have call predecessors, (33), 17 states have return successors, (33), 14 states have call predecessors, (33), 15 states have call successors, (33) [2023-11-12 00:52:22,028 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2023-11-12 00:52:22,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-12 00:52:22,032 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:52:22,033 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]