./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 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_cceb316d-d48f-456c-8a42-f36aba7ff25a/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceb316d-d48f-456c-8a42-f36aba7ff25a/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceb316d-d48f-456c-8a42-f36aba7ff25a/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceb316d-d48f-456c-8a42-f36aba7ff25a/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceb316d-d48f-456c-8a42-f36aba7ff25a/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceb316d-d48f-456c-8a42-f36aba7ff25a/bin/utaipan-verify-QoSU8krkJ5 --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 2cb37d56f61ec273f723a733aad4526e011a3841f34b26767a03fdc541dd1ee3 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:36:35,976 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:36:36,055 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceb316d-d48f-456c-8a42-f36aba7ff25a/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-21 19:36:36,061 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:36:36,062 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:36:36,092 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:36:36,093 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:36:36,093 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:36:36,094 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:36:36,095 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:36:36,095 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:36:36,096 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:36:36,096 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:36:36,097 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:36:36,098 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:36:36,098 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:36:36,099 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:36:36,099 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:36:36,100 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:36:36,101 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:36:36,101 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:36:36,102 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:36:36,103 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:36:36,104 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 19:36:36,104 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 19:36:36,105 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:36:36,105 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 19:36:36,106 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:36:36,106 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 19:36:36,107 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:36:36,107 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 19:36:36,108 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 19:36:36,108 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 19:36:36,109 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:36:36,109 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:36:36,110 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:36:36,110 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:36:36,110 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:36:36,111 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:36:36,111 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:36:36,111 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 19:36:36,117 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:36:36,117 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:36:36,117 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:36:36,118 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 19:36:36,118 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:36:36,118 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:36:36,119 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_cceb316d-d48f-456c-8a42-f36aba7ff25a/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceb316d-d48f-456c-8a42-f36aba7ff25a/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2cb37d56f61ec273f723a733aad4526e011a3841f34b26767a03fdc541dd1ee3 [2023-11-21 19:36:36,460 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:36:36,493 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:36:36,496 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:36:36,498 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:36:36,499 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:36:36,500 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceb316d-d48f-456c-8a42-f36aba7ff25a/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-1.c [2023-11-21 19:36:39,596 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:36:39,850 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:36:39,850 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceb316d-d48f-456c-8a42-f36aba7ff25a/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-1.c [2023-11-21 19:36:39,868 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceb316d-d48f-456c-8a42-f36aba7ff25a/bin/utaipan-verify-QoSU8krkJ5/data/b11405930/95549147b74442e7a2b1bfa997187c62/FLAGfb31e85c0 [2023-11-21 19:36:39,882 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceb316d-d48f-456c-8a42-f36aba7ff25a/bin/utaipan-verify-QoSU8krkJ5/data/b11405930/95549147b74442e7a2b1bfa997187c62 [2023-11-21 19:36:39,885 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:36:39,886 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:36:39,887 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:36:39,888 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:36:39,900 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:36:39,901 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:36:39" (1/1) ... [2023-11-21 19:36:39,902 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@375cc361 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:39, skipping insertion in model container [2023-11-21 19:36:39,902 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:36:39" (1/1) ... [2023-11-21 19:36:39,982 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:36:40,207 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_cceb316d-d48f-456c-8a42-f36aba7ff25a/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-1.c[914,927] [2023-11-21 19:36:40,267 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_cceb316d-d48f-456c-8a42-f36aba7ff25a/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-1.c[7115,7128] [2023-11-21 19:36:40,388 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:36:40,401 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:36:40,414 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_cceb316d-d48f-456c-8a42-f36aba7ff25a/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-1.c[914,927] [2023-11-21 19:36:40,434 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_cceb316d-d48f-456c-8a42-f36aba7ff25a/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-1.c[7115,7128] [2023-11-21 19:36:40,484 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:36:40,512 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:36:40,512 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:40 WrapperNode [2023-11-21 19:36:40,512 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:36:40,513 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:36:40,514 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:36:40,514 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:36:40,521 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:40" (1/1) ... [2023-11-21 19:36:40,537 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:40" (1/1) ... [2023-11-21 19:36:40,602 INFO L138 Inliner]: procedures = 71, calls = 84, calls flagged for inlining = 40, calls inlined = 40, statements flattened = 890 [2023-11-21 19:36:40,602 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:36:40,603 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:36:40,603 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:36:40,603 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:36:40,613 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:40" (1/1) ... [2023-11-21 19:36:40,614 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:40" (1/1) ... [2023-11-21 19:36:40,619 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:40" (1/1) ... [2023-11-21 19:36:40,620 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:40" (1/1) ... [2023-11-21 19:36:40,653 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:40" (1/1) ... [2023-11-21 19:36:40,668 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:40" (1/1) ... [2023-11-21 19:36:40,688 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:40" (1/1) ... [2023-11-21 19:36:40,692 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:40" (1/1) ... [2023-11-21 19:36:40,699 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:36:40,713 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:36:40,713 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:36:40,713 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:36:40,714 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:40" (1/1) ... [2023-11-21 19:36:40,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:36:40,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceb316d-d48f-456c-8a42-f36aba7ff25a/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:36:40,768 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceb316d-d48f-456c-8a42-f36aba7ff25a/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:36:40,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceb316d-d48f-456c-8a42-f36aba7ff25a/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:36:40,805 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:36:40,806 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-21 19:36:40,807 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-21 19:36:40,807 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2023-11-21 19:36:40,807 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2023-11-21 19:36:40,807 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-11-21 19:36:40,808 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-11-21 19:36:40,808 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-11-21 19:36:40,808 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-11-21 19:36:40,808 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2023-11-21 19:36:40,808 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2023-11-21 19:36:40,809 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-11-21 19:36:40,809 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-11-21 19:36:40,809 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-11-21 19:36:40,809 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-11-21 19:36:40,809 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2023-11-21 19:36:40,810 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2023-11-21 19:36:40,810 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2023-11-21 19:36:40,810 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2023-11-21 19:36:40,810 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2023-11-21 19:36:40,810 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2023-11-21 19:36:40,811 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-11-21 19:36:40,811 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-11-21 19:36:40,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 19:36:40,811 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-11-21 19:36:40,811 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-11-21 19:36:40,812 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2023-11-21 19:36:40,812 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2023-11-21 19:36:40,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:36:40,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:36:40,812 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-11-21 19:36:40,813 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-11-21 19:36:40,969 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:36:40,972 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:36:41,978 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:36:42,513 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:36:42,513 INFO L308 CfgBuilder]: Removed 16 assume(true) statements. [2023-11-21 19:36:42,515 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:36:42 BoogieIcfgContainer [2023-11-21 19:36:42,515 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:36:42,520 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:36:42,520 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:36:42,524 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:36:42,524 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:36:39" (1/3) ... [2023-11-21 19:36:42,525 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41b1aebe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:36:42, skipping insertion in model container [2023-11-21 19:36:42,525 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:40" (2/3) ... [2023-11-21 19:36:42,527 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41b1aebe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:36:42, skipping insertion in model container [2023-11-21 19:36:42,527 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:36:42" (3/3) ... [2023-11-21 19:36:42,529 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.09.cil-1.c [2023-11-21 19:36:42,554 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:36:42,555 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-21 19:36:42,634 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:36:42,642 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;@2975e953, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:36:42,642 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-21 19:36:42,650 INFO L276 IsEmpty]: Start isEmpty. Operand has 237 states, 183 states have (on average 1.5027322404371584) internal successors, (275), 189 states have internal predecessors, (275), 37 states have call successors, (37), 14 states have call predecessors, (37), 14 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2023-11-21 19:36:42,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-21 19:36:42,662 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:36:42,663 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:36:42,664 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:36:42,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:36:42,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1505647349, now seen corresponding path program 1 times [2023-11-21 19:36:42,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:36:42,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145303016] [2023-11-21 19:36:42,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:36:42,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:36:42,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:36:43,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:36:43,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:36:43,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145303016] [2023-11-21 19:36:43,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145303016] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:36:43,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:36:43,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 19:36:43,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643965363] [2023-11-21 19:36:43,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:36:43,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 19:36:43,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:36:43,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 19:36:43,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:36:43,174 INFO L87 Difference]: Start difference. First operand has 237 states, 183 states have (on average 1.5027322404371584) internal successors, (275), 189 states have internal predecessors, (275), 37 states have call successors, (37), 14 states have call predecessors, (37), 14 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-21 19:36:43,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:36:43,651 INFO L93 Difference]: Finished difference Result 525 states and 769 transitions. [2023-11-21 19:36:43,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 19:36:43,654 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2023-11-21 19:36:43,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:36:43,667 INFO L225 Difference]: With dead ends: 525 [2023-11-21 19:36:43,667 INFO L226 Difference]: Without dead ends: 292 [2023-11-21 19:36:43,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:36:43,685 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 397 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 19:36:43,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 584 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 19:36:43,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2023-11-21 19:36:43,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 285. [2023-11-21 19:36:43,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 218 states have (on average 1.4128440366972477) internal successors, (308), 222 states have internal predecessors, (308), 45 states have call successors, (45), 21 states have call predecessors, (45), 20 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2023-11-21 19:36:43,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 396 transitions. [2023-11-21 19:36:43,783 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 396 transitions. Word has length 45 [2023-11-21 19:36:43,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:36:43,784 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 396 transitions. [2023-11-21 19:36:43,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-21 19:36:43,785 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 396 transitions. [2023-11-21 19:36:43,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-21 19:36:43,788 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:36:43,788 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:36:43,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 19:36:43,788 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:36:43,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:36:43,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1870345324, now seen corresponding path program 1 times [2023-11-21 19:36:43,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:36:43,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111824191] [2023-11-21 19:36:43,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:36:43,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:36:43,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:36:44,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:36:44,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:36:44,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111824191] [2023-11-21 19:36:44,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111824191] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:36:44,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:36:44,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-21 19:36:44,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992567140] [2023-11-21 19:36:44,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:36:44,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 19:36:44,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:36:44,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 19:36:44,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 19:36:44,159 INFO L87 Difference]: Start difference. First operand 285 states and 396 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-21 19:36:45,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:36:45,208 INFO L93 Difference]: Finished difference Result 466 states and 617 transitions. [2023-11-21 19:36:45,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-21 19:36:45,209 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 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 45 [2023-11-21 19:36:45,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:36:45,216 INFO L225 Difference]: With dead ends: 466 [2023-11-21 19:36:45,216 INFO L226 Difference]: Without dead ends: 350 [2023-11-21 19:36:45,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-21 19:36:45,225 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 482 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 1011 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-21 19:36:45,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 1011 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-21 19:36:45,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2023-11-21 19:36:45,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 337. [2023-11-21 19:36:45,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 255 states have (on average 1.392156862745098) internal successors, (355), 259 states have internal predecessors, (355), 53 states have call successors, (53), 28 states have call predecessors, (53), 27 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2023-11-21 19:36:45,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 459 transitions. [2023-11-21 19:36:45,295 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 459 transitions. Word has length 45 [2023-11-21 19:36:45,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:36:45,296 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 459 transitions. [2023-11-21 19:36:45,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-21 19:36:45,296 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 459 transitions. [2023-11-21 19:36:45,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-21 19:36:45,306 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:36:45,309 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:36:45,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 19:36:45,310 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:36:45,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:36:45,320 INFO L85 PathProgramCache]: Analyzing trace with hash -737198275, now seen corresponding path program 1 times [2023-11-21 19:36:45,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:36:45,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828636167] [2023-11-21 19:36:45,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:36:45,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:36:45,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:36:45,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:36:45,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:36:45,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828636167] [2023-11-21 19:36:45,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828636167] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:36:45,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:36:45,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:36:45,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573452383] [2023-11-21 19:36:45,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:36:45,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:36:45,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:36:45,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:36:45,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:36:45,422 INFO L87 Difference]: Start difference. First operand 337 states and 459 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 19:36:45,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:36:45,587 INFO L93 Difference]: Finished difference Result 665 states and 865 transitions. [2023-11-21 19:36:45,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:36:45,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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 46 [2023-11-21 19:36:45,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:36:45,592 INFO L225 Difference]: With dead ends: 665 [2023-11-21 19:36:45,593 INFO L226 Difference]: Without dead ends: 496 [2023-11-21 19:36:45,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:36:45,601 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 308 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:36:45,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 340 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:36:45,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2023-11-21 19:36:45,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 477. [2023-11-21 19:36:45,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 350 states have (on average 1.3285714285714285) internal successors, (465), 354 states have internal predecessors, (465), 77 states have call successors, (77), 49 states have call predecessors, (77), 48 states have return successors, (75), 75 states have call predecessors, (75), 75 states have call successors, (75) [2023-11-21 19:36:45,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 617 transitions. [2023-11-21 19:36:45,669 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 617 transitions. Word has length 46 [2023-11-21 19:36:45,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:36:45,670 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 617 transitions. [2023-11-21 19:36:45,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 19:36:45,670 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 617 transitions. [2023-11-21 19:36:45,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-21 19:36:45,673 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:36:45,673 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:36:45,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 19:36:45,673 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:36:45,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:36:45,674 INFO L85 PathProgramCache]: Analyzing trace with hash -517834120, now seen corresponding path program 1 times [2023-11-21 19:36:45,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:36:45,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822167705] [2023-11-21 19:36:45,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:36:45,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:36:45,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:36:45,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:36:45,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:36:45,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822167705] [2023-11-21 19:36:45,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822167705] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:36:45,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:36:45,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:36:45,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592363725] [2023-11-21 19:36:45,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:36:45,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:36:45,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:36:45,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:36:45,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:36:45,763 INFO L87 Difference]: Start difference. First operand 477 states and 617 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 19:36:45,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:36:45,951 INFO L93 Difference]: Finished difference Result 847 states and 1062 transitions. [2023-11-21 19:36:45,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:36:45,952 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2023-11-21 19:36:45,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:36:45,957 INFO L225 Difference]: With dead ends: 847 [2023-11-21 19:36:45,957 INFO L226 Difference]: Without dead ends: 584 [2023-11-21 19:36:45,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:36:45,959 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 67 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:36:45,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 541 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:36:45,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2023-11-21 19:36:46,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 578. [2023-11-21 19:36:46,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 421 states have (on average 1.3135391923990498) internal successors, (553), 425 states have internal predecessors, (553), 93 states have call successors, (93), 63 states have call predecessors, (93), 62 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2023-11-21 19:36:46,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 737 transitions. [2023-11-21 19:36:46,020 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 737 transitions. Word has length 47 [2023-11-21 19:36:46,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:36:46,021 INFO L495 AbstractCegarLoop]: Abstraction has 578 states and 737 transitions. [2023-11-21 19:36:46,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 19:36:46,021 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 737 transitions. [2023-11-21 19:36:46,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-21 19:36:46,023 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:36:46,023 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:36:46,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 19:36:46,024 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:36:46,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:36:46,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1242421919, now seen corresponding path program 1 times [2023-11-21 19:36:46,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:36:46,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383277190] [2023-11-21 19:36:46,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:36:46,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:36:46,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:36:46,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:36:46,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:36:46,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383277190] [2023-11-21 19:36:46,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383277190] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:36:46,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:36:46,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 19:36:46,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997948078] [2023-11-21 19:36:46,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:36:46,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 19:36:46,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:36:46,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 19:36:46,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:36:46,108 INFO L87 Difference]: Start difference. First operand 578 states and 737 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-21 19:36:46,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:36:46,435 INFO L93 Difference]: Finished difference Result 685 states and 863 transitions. [2023-11-21 19:36:46,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 19:36:46,436 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2023-11-21 19:36:46,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:36:46,440 INFO L225 Difference]: With dead ends: 685 [2023-11-21 19:36:46,441 INFO L226 Difference]: Without dead ends: 682 [2023-11-21 19:36:46,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:36:46,442 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 556 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 19:36:46,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [556 Valid, 323 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 19:36:46,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2023-11-21 19:36:46,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 577. [2023-11-21 19:36:46,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 421 states have (on average 1.3064133016627077) internal successors, (550), 424 states have internal predecessors, (550), 92 states have call successors, (92), 63 states have call predecessors, (92), 62 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2023-11-21 19:36:46,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 733 transitions. [2023-11-21 19:36:46,514 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 733 transitions. Word has length 54 [2023-11-21 19:36:46,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:36:46,515 INFO L495 AbstractCegarLoop]: Abstraction has 577 states and 733 transitions. [2023-11-21 19:36:46,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-21 19:36:46,516 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 733 transitions. [2023-11-21 19:36:46,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-21 19:36:46,517 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:36:46,517 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:36:46,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 19:36:46,518 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:36:46,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:36:46,518 INFO L85 PathProgramCache]: Analyzing trace with hash -140849439, now seen corresponding path program 1 times [2023-11-21 19:36:46,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:36:46,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679811124] [2023-11-21 19:36:46,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:36:46,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:36:46,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:36:46,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:36:46,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:36:46,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679811124] [2023-11-21 19:36:46,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679811124] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:36:46,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781891017] [2023-11-21 19:36:46,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:36:46,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:36:46,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceb316d-d48f-456c-8a42-f36aba7ff25a/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:36:46,776 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceb316d-d48f-456c-8a42-f36aba7ff25a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:36:46,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceb316d-d48f-456c-8a42-f36aba7ff25a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 19:36:46,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:36:46,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 19:36:46,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:36:47,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:36:47,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:36:47,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:36:47,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781891017] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:36:47,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [282871940] [2023-11-21 19:36:47,304 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-11-21 19:36:47,304 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:36:47,308 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:36:47,313 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:36:47,314 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:36:55,923 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 181 for LOIs [2023-11-21 19:36:56,052 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 177 for LOIs [2023-11-21 19:36:56,146 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 185 for LOIs [2023-11-21 19:36:57,419 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 181 for LOIs [2023-11-21 19:36:57,680 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 181 for LOIs [2023-11-21 19:36:58,017 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 181 for LOIs [2023-11-21 19:36:58,120 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 188 for LOIs [2023-11-21 19:36:58,226 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:37:23,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [282871940] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:37:23,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-21 19:37:23,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [5, 5, 4] total 41 [2023-11-21 19:37:23,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701877010] [2023-11-21 19:37:23,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:37:23,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-21 19:37:23,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:37:23,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-21 19:37:23,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1447, Unknown=0, NotChecked=0, Total=1640 [2023-11-21 19:37:23,951 INFO L87 Difference]: Start difference. First operand 577 states and 733 transitions. Second operand has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7)