./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a 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_414fd630-bb5b-4ea8-b0e5-3fe25a413f47/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_414fd630-bb5b-4ea8-b0e5-3fe25a413f47/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_414fd630-bb5b-4ea8-b0e5-3fe25a413f47/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_414fd630-bb5b-4ea8-b0e5-3fe25a413f47/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_414fd630-bb5b-4ea8-b0e5-3fe25a413f47/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_414fd630-bb5b-4ea8-b0e5-3fe25a413f47/bin/utaipan-verify-DbMuA5NWw2 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ecd70163e84c8e1a236d7543bf55ca7587f7becacb8c522f7caae4b1076f13b5 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:30:01,207 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:30:01,279 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_414fd630-bb5b-4ea8-b0e5-3fe25a413f47/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:30:01,284 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:30:01,284 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:30:01,306 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:30:01,307 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:30:01,307 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:30:01,308 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:30:01,308 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:30:01,309 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:30:01,309 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:30:01,310 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:30:01,310 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:30:01,311 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:30:01,311 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:30:01,311 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:30:01,312 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:30:01,312 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:30:01,313 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:30:01,313 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:30:01,314 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:30:01,314 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:30:01,315 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:30:01,320 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:30:01,321 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:30:01,321 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:30:01,321 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:30:01,321 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:30:01,322 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:30:01,322 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:30:01,322 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:30:01,322 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:30:01,323 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:30:01,323 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:30:01,323 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:30:01,324 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:30:01,324 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:30:01,324 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:30:01,325 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:30:01,325 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:30:01,326 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:30:01,326 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:30:01,326 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:30:01,326 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:30:01,327 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:30:01,327 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:30:01,327 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_414fd630-bb5b-4ea8-b0e5-3fe25a413f47/bin/utaipan-verify-DbMuA5NWw2/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_414fd630-bb5b-4ea8-b0e5-3fe25a413f47/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ecd70163e84c8e1a236d7543bf55ca7587f7becacb8c522f7caae4b1076f13b5 [2024-11-02 12:30:01,622 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:30:01,652 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:30:01,656 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:30:01,658 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:30:01,659 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:30:01,660 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_414fd630-bb5b-4ea8-b0e5-3fe25a413f47/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-1.c Unable to find full path for "g++" [2024-11-02 12:30:03,745 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:30:03,981 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:30:03,982 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_414fd630-bb5b-4ea8-b0e5-3fe25a413f47/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-1.c [2024-11-02 12:30:04,001 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_414fd630-bb5b-4ea8-b0e5-3fe25a413f47/bin/utaipan-verify-DbMuA5NWw2/data/7d417b10a/96119b3520134f1f9b5fd5e88f227775/FLAG00e6f1b6a [2024-11-02 12:30:04,016 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_414fd630-bb5b-4ea8-b0e5-3fe25a413f47/bin/utaipan-verify-DbMuA5NWw2/data/7d417b10a/96119b3520134f1f9b5fd5e88f227775 [2024-11-02 12:30:04,019 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:30:04,020 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:30:04,022 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:30:04,022 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:30:04,029 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:30:04,030 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:30:04" (1/1) ... [2024-11-02 12:30:04,031 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24b21b03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:30:04, skipping insertion in model container [2024-11-02 12:30:04,031 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:30:04" (1/1) ... [2024-11-02 12:30:04,102 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:30:04,311 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_414fd630-bb5b-4ea8-b0e5-3fe25a413f47/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-1.c[914,927] [2024-11-02 12:30:04,392 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_414fd630-bb5b-4ea8-b0e5-3fe25a413f47/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-1.c[7115,7128] [2024-11-02 12:30:04,547 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:30:04,566 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:30:04,581 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_414fd630-bb5b-4ea8-b0e5-3fe25a413f47/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-1.c[914,927] [2024-11-02 12:30:04,622 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_414fd630-bb5b-4ea8-b0e5-3fe25a413f47/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-1.c[7115,7128] [2024-11-02 12:30:04,707 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:30:04,753 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:30:04,754 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:30:04 WrapperNode [2024-11-02 12:30:04,754 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:30:04,755 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:30:04,755 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:30:04,755 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:30:04,762 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:30:04" (1/1) ... [2024-11-02 12:30:04,776 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:30:04" (1/1) ... [2024-11-02 12:30:04,848 INFO L138 Inliner]: procedures = 75, calls = 91, calls flagged for inlining = 43, calls inlined = 43, statements flattened = 1014 [2024-11-02 12:30:04,849 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:30:04,850 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:30:04,850 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:30:04,851 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:30:04,862 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:30:04" (1/1) ... [2024-11-02 12:30:04,863 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:30:04" (1/1) ... [2024-11-02 12:30:04,868 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:30:04" (1/1) ... [2024-11-02 12:30:04,868 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:30:04" (1/1) ... [2024-11-02 12:30:04,894 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:30:04" (1/1) ... [2024-11-02 12:30:04,920 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:30:04" (1/1) ... [2024-11-02 12:30:04,948 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:30:04" (1/1) ... [2024-11-02 12:30:04,955 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:30:04" (1/1) ... [2024-11-02 12:30:04,971 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:30:04,972 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:30:04,972 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:30:04,972 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:30:04,978 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:30:04" (1/1) ... [2024-11-02 12:30:04,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:30:05,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_414fd630-bb5b-4ea8-b0e5-3fe25a413f47/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:30:05,031 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_414fd630-bb5b-4ea8-b0e5-3fe25a413f47/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:30:05,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_414fd630-bb5b-4ea8-b0e5-3fe25a413f47/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:30:05,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:30:05,079 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-02 12:30:05,080 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-02 12:30:05,080 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2024-11-02 12:30:05,080 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2024-11-02 12:30:05,080 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2024-11-02 12:30:05,080 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2024-11-02 12:30:05,080 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2024-11-02 12:30:05,081 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2024-11-02 12:30:05,081 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2024-11-02 12:30:05,081 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2024-11-02 12:30:05,081 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2024-11-02 12:30:05,081 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2024-11-02 12:30:05,081 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2024-11-02 12:30:05,081 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2024-11-02 12:30:05,081 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2024-11-02 12:30:05,082 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2024-11-02 12:30:05,082 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2024-11-02 12:30:05,082 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2024-11-02 12:30:05,082 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2024-11-02 12:30:05,082 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2024-11-02 12:30:05,083 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2024-11-02 12:30:05,083 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2024-11-02 12:30:05,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:30:05,083 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2024-11-02 12:30:05,083 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2024-11-02 12:30:05,084 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2024-11-02 12:30:05,084 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2024-11-02 12:30:05,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:30:05,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:30:05,084 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2024-11-02 12:30:05,084 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2024-11-02 12:30:05,084 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2024-11-02 12:30:05,085 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2024-11-02 12:30:05,221 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:30:05,224 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:30:06,504 INFO L? ?]: Removed 125 outVars from TransFormulas that were not future-live. [2024-11-02 12:30:06,505 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:30:07,054 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:30:07,056 INFO L316 CfgBuilder]: Removed 18 assume(true) statements. [2024-11-02 12:30:07,057 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:30:07 BoogieIcfgContainer [2024-11-02 12:30:07,057 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:30:07,060 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:30:07,062 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:30:07,065 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:30:07,066 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:30:04" (1/3) ... [2024-11-02 12:30:07,067 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ccf59a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:30:07, skipping insertion in model container [2024-11-02 12:30:07,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:30:04" (2/3) ... [2024-11-02 12:30:07,067 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ccf59a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:30:07, skipping insertion in model container [2024-11-02 12:30:07,069 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:30:07" (3/3) ... [2024-11-02 12:30:07,070 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.11.cil-1.c [2024-11-02 12:30:07,092 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:30:07,092 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-02 12:30:07,188 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:30:07,196 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@379878d5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:30:07,196 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-02 12:30:07,202 INFO L276 IsEmpty]: Start isEmpty. Operand has 267 states, 208 states have (on average 1.5144230769230769) internal successors, (315), 216 states have internal predecessors, (315), 41 states have call successors, (41), 15 states have call predecessors, (41), 15 states have return successors, (41), 39 states have call predecessors, (41), 41 states have call successors, (41) [2024-11-02 12:30:07,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-02 12:30:07,214 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:30:07,215 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:30:07,216 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:30:07,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:30:07,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1355163100, now seen corresponding path program 1 times [2024-11-02 12:30:07,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:30:07,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333869561] [2024-11-02 12:30:07,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:30:07,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:30:07,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:30:07,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:30:07,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:30:07,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333869561] [2024-11-02 12:30:07,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333869561] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:30:07,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:30:07,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-02 12:30:07,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041791777] [2024-11-02 12:30:07,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:30:07,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 12:30:07,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:30:07,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 12:30:07,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:30:07,754 INFO L87 Difference]: Start difference. First operand has 267 states, 208 states have (on average 1.5144230769230769) internal successors, (315), 216 states have internal predecessors, (315), 41 states have call successors, (41), 15 states have call predecessors, (41), 15 states have return successors, (41), 39 states have call predecessors, (41), 41 states have call successors, (41) Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-02 12:30:09,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:30:09,156 INFO L93 Difference]: Finished difference Result 953 states and 1392 transitions. [2024-11-02 12:30:09,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-02 12:30:09,159 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2024-11-02 12:30:09,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:30:09,175 INFO L225 Difference]: With dead ends: 953 [2024-11-02 12:30:09,175 INFO L226 Difference]: Without dead ends: 672 [2024-11-02 12:30:09,182 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-02 12:30:09,188 INFO L432 NwaCegarLoop]: 442 mSDtfsCounter, 1073 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1080 SdHoareTripleChecker+Valid, 1157 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:30:09,189 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1080 Valid, 1157 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-02 12:30:09,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2024-11-02 12:30:09,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 601. [2024-11-02 12:30:09,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 442 states have (on average 1.3574660633484164) internal successors, (600), 447 states have internal predecessors, (600), 96 states have call successors, (96), 63 states have call predecessors, (96), 61 states have return successors, (107), 92 states have call predecessors, (107), 92 states have call successors, (107) [2024-11-02 12:30:09,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 803 transitions. [2024-11-02 12:30:09,340 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 803 transitions. Word has length 45 [2024-11-02 12:30:09,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:30:09,343 INFO L471 AbstractCegarLoop]: Abstraction has 601 states and 803 transitions. [2024-11-02 12:30:09,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-02 12:30:09,344 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 803 transitions. [2024-11-02 12:30:09,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-02 12:30:09,348 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:30:09,348 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:30:09,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:30:09,349 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:30:09,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:30:09,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1122354544, now seen corresponding path program 1 times [2024-11-02 12:30:09,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:30:09,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396842773] [2024-11-02 12:30:09,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:30:09,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:30:09,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:30:09,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:30:09,782 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:30:09,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396842773] [2024-11-02 12:30:09,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396842773] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:30:09,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:30:09,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-02 12:30:09,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909126193] [2024-11-02 12:30:09,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:30:09,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-02 12:30:09,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:30:09,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-02 12:30:09,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-02 12:30:09,789 INFO L87 Difference]: Start difference. First operand 601 states and 803 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-02 12:30:10,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:30:10,968 INFO L93 Difference]: Finished difference Result 1362 states and 1750 transitions. [2024-11-02 12:30:10,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-02 12:30:10,969 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2024-11-02 12:30:10,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:30:10,980 INFO L225 Difference]: With dead ends: 1362 [2024-11-02 12:30:10,980 INFO L226 Difference]: Without dead ends: 959 [2024-11-02 12:30:10,983 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2024-11-02 12:30:10,985 INFO L432 NwaCegarLoop]: 217 mSDtfsCounter, 536 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 1003 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-02 12:30:10,988 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [566 Valid, 1003 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 971 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-02 12:30:10,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2024-11-02 12:30:11,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 930. [2024-11-02 12:30:11,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 665 states have (on average 1.3097744360902255) internal successors, (871), 671 states have internal predecessors, (871), 152 states have call successors, (152), 111 states have call predecessors, (152), 111 states have return successors, (181), 149 states have call predecessors, (181), 148 states have call successors, (181) [2024-11-02 12:30:11,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1204 transitions. [2024-11-02 12:30:11,124 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1204 transitions. Word has length 46 [2024-11-02 12:30:11,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:30:11,126 INFO L471 AbstractCegarLoop]: Abstraction has 930 states and 1204 transitions. [2024-11-02 12:30:11,126 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-02 12:30:11,127 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1204 transitions. [2024-11-02 12:30:11,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-02 12:30:11,131 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:30:11,131 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:30:11,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 12:30:11,132 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:30:11,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:30:11,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1115818693, now seen corresponding path program 1 times [2024-11-02 12:30:11,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:30:11,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811328472] [2024-11-02 12:30:11,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:30:11,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:30:11,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:30:11,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:30:11,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:30:11,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811328472] [2024-11-02 12:30:11,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811328472] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:30:11,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:30:11,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:30:11,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667096580] [2024-11-02 12:30:11,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:30:11,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:30:11,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:30:11,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:30:11,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:30:11,266 INFO L87 Difference]: Start difference. First operand 930 states and 1204 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-02 12:30:11,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:30:11,525 INFO L93 Difference]: Finished difference Result 1871 states and 2363 transitions. [2024-11-02 12:30:11,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:30:11,527 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2024-11-02 12:30:11,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:30:11,537 INFO L225 Difference]: With dead ends: 1871 [2024-11-02 12:30:11,537 INFO L226 Difference]: Without dead ends: 1189 [2024-11-02 12:30:11,542 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:30:11,543 INFO L432 NwaCegarLoop]: 326 mSDtfsCounter, 68 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:30:11,546 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 624 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:30:11,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2024-11-02 12:30:11,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 1167. [2024-11-02 12:30:11,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 826 states have (on average 1.2893462469733656) internal successors, (1065), 832 states have internal predecessors, (1065), 194 states have call successors, (194), 149 states have call predecessors, (194), 145 states have return successors, (227), 187 states have call predecessors, (227), 190 states have call successors, (227) [2024-11-02 12:30:11,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1486 transitions. [2024-11-02 12:30:11,696 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1486 transitions. Word has length 47 [2024-11-02 12:30:11,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:30:11,697 INFO L471 AbstractCegarLoop]: Abstraction has 1167 states and 1486 transitions. [2024-11-02 12:30:11,697 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-02 12:30:11,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1486 transitions. [2024-11-02 12:30:11,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-02 12:30:11,703 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:30:11,703 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:30:11,703 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 12:30:11,703 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:30:11,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:30:11,704 INFO L85 PathProgramCache]: Analyzing trace with hash -942927353, now seen corresponding path program 1 times [2024-11-02 12:30:11,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:30:11,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455826814] [2024-11-02 12:30:11,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:30:11,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:30:11,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:30:11,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:30:11,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:30:11,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455826814] [2024-11-02 12:30:11,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455826814] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:30:11,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:30:11,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:30:11,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490015250] [2024-11-02 12:30:11,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:30:11,765 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:30:11,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:30:11,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:30:11,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:30:11,767 INFO L87 Difference]: Start difference. First operand 1167 states and 1486 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-02 12:30:11,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:30:11,969 INFO L93 Difference]: Finished difference Result 1573 states and 1976 transitions. [2024-11-02 12:30:11,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:30:11,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2024-11-02 12:30:11,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:30:11,976 INFO L225 Difference]: With dead ends: 1573 [2024-11-02 12:30:11,976 INFO L226 Difference]: Without dead ends: 1018 [2024-11-02 12:30:11,978 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:30:11,979 INFO L432 NwaCegarLoop]: 327 mSDtfsCounter, 349 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:30:11,980 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 389 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:30:11,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2024-11-02 12:30:12,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 812. [2024-11-02 12:30:12,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 590 states have (on average 1.2915254237288136) internal successors, (762), 595 states have internal predecessors, (762), 131 states have call successors, (131), 95 states have call predecessors, (131), 89 states have return successors, (135), 123 states have call predecessors, (135), 127 states have call successors, (135) [2024-11-02 12:30:12,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1028 transitions. [2024-11-02 12:30:12,055 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1028 transitions. Word has length 53 [2024-11-02 12:30:12,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:30:12,056 INFO L471 AbstractCegarLoop]: Abstraction has 812 states and 1028 transitions. [2024-11-02 12:30:12,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-02 12:30:12,056 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1028 transitions. [2024-11-02 12:30:12,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-02 12:30:12,057 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:30:12,058 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:30:12,058 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 12:30:12,058 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:30:12,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:30:12,059 INFO L85 PathProgramCache]: Analyzing trace with hash 377976334, now seen corresponding path program 1 times [2024-11-02 12:30:12,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:30:12,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391011250] [2024-11-02 12:30:12,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:30:12,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:30:12,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:30:12,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:30:12,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:30:12,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391011250] [2024-11-02 12:30:12,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391011250] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:30:12,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:30:12,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:30:12,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642579722] [2024-11-02 12:30:12,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:30:12,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:30:12,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:30:12,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:30:12,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:30:12,153 INFO L87 Difference]: Start difference. First operand 812 states and 1028 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2024-11-02 12:30:12,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:30:12,639 INFO L93 Difference]: Finished difference Result 1067 states and 1329 transitions. [2024-11-02 12:30:12,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:30:12,639 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2024-11-02 12:30:12,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:30:12,645 INFO L225 Difference]: With dead ends: 1067 [2024-11-02 12:30:12,646 INFO L226 Difference]: Without dead ends: 1064 [2024-11-02 12:30:12,646 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:30:12,648 INFO L432 NwaCegarLoop]: 322 mSDtfsCounter, 637 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 12:30:12,648 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [637 Valid, 365 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 12:30:12,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2024-11-02 12:30:12,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 811. [2024-11-02 12:30:12,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 590 states have (on average 1.2813559322033898) internal successors, (756), 594 states have internal predecessors, (756), 130 states have call successors, (130), 95 states have call predecessors, (130), 89 states have return successors, (135), 123 states have call predecessors, (135), 127 states have call successors, (135) [2024-11-02 12:30:12,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1021 transitions. [2024-11-02 12:30:12,746 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1021 transitions. Word has length 54 [2024-11-02 12:30:12,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:30:12,747 INFO L471 AbstractCegarLoop]: Abstraction has 811 states and 1021 transitions. [2024-11-02 12:30:12,747 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2024-11-02 12:30:12,747 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1021 transitions. [2024-11-02 12:30:12,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-02 12:30:12,748 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:30:12,748 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:30:12,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-02 12:30:12,748 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:30:12,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:30:12,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1169035218, now seen corresponding path program 1 times [2024-11-02 12:30:12,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:30:12,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120043064] [2024-11-02 12:30:12,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:30:12,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:30:12,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:30:12,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:30:12,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:30:12,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120043064] [2024-11-02 12:30:12,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120043064] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:30:12,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860619640] [2024-11-02 12:30:12,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:30:12,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:30:12,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_414fd630-bb5b-4ea8-b0e5-3fe25a413f47/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:30:12,928 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_414fd630-bb5b-4ea8-b0e5-3fe25a413f47/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:30:12,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_414fd630-bb5b-4ea8-b0e5-3fe25a413f47/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:30:13,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:30:13,075 INFO L255 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-02 12:30:13,081 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:30:13,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:30:13,395 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:30:13,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:30:13,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860619640] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:30:13,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [792831842] [2024-11-02 12:30:13,536 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2024-11-02 12:30:13,536 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:30:13,540 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:30:13,546 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:30:13,546 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:30:21,470 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 201 for LOIs [2024-11-02 12:30:21,565 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 197 for LOIs [2024-11-02 12:30:21,685 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 205 for LOIs [2024-11-02 12:30:22,937 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 201 for LOIs [2024-11-02 12:30:23,223 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 201 for LOIs [2024-11-02 12:30:23,453 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 201 for LOIs [2024-11-02 12:30:23,543 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 208 for LOIs [2024-11-02 12:30:23,621 INFO L180 IcfgInterpreter]: Interpretation finished