./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fc8b34-b091-4cc5-90fd-a28bb951282a/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fc8b34-b091-4cc5-90fd-a28bb951282a/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fc8b34-b091-4cc5-90fd-a28bb951282a/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fc8b34-b091-4cc5-90fd-a28bb951282a/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fc8b34-b091-4cc5-90fd-a28bb951282a/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fc8b34-b091-4cc5-90fd-a28bb951282a/bin/utaipan-verify-mE87zJ7Ire --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 d7581eca761af2e68d92eb1cb64032fd3321be3eb54b53aabe807351a9f77b1d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:33:19,639 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:33:19,710 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fc8b34-b091-4cc5-90fd-a28bb951282a/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 20:33:19,716 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:33:19,716 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:33:19,743 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:33:19,744 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:33:19,744 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:33:19,745 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:33:19,746 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:33:19,746 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:33:19,747 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:33:19,747 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:33:19,748 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:33:19,748 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:33:19,749 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:33:19,749 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:33:19,750 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:33:19,750 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:33:19,751 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:33:19,751 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:33:19,752 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:33:19,753 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:33:19,753 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:33:19,753 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:33:19,754 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:33:19,754 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:33:19,755 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:33:19,755 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:33:19,756 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:33:19,756 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:33:19,756 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:33:19,757 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:33:19,757 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:33:19,758 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:33:19,758 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:33:19,759 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:33:19,759 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:33:19,759 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:33:19,760 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:33:19,760 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:33:19,765 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:33:19,766 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:33:19,767 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:33:19,767 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:33:19,768 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:33:19,768 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:33:19,768 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_c7fc8b34-b091-4cc5-90fd-a28bb951282a/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fc8b34-b091-4cc5-90fd-a28bb951282a/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7581eca761af2e68d92eb1cb64032fd3321be3eb54b53aabe807351a9f77b1d [2023-11-23 20:33:20,097 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:33:20,129 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:33:20,132 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:33:20,134 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:33:20,135 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:33:20,136 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fc8b34-b091-4cc5-90fd-a28bb951282a/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-2.c [2023-11-23 20:33:23,182 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:33:23,461 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:33:23,461 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fc8b34-b091-4cc5-90fd-a28bb951282a/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-2.c [2023-11-23 20:33:23,478 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fc8b34-b091-4cc5-90fd-a28bb951282a/bin/utaipan-verify-mE87zJ7Ire/data/138b68bb1/eceaffcf9b2149bdbc65234cb139d906/FLAG463bea48e [2023-11-23 20:33:23,497 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fc8b34-b091-4cc5-90fd-a28bb951282a/bin/utaipan-verify-mE87zJ7Ire/data/138b68bb1/eceaffcf9b2149bdbc65234cb139d906 [2023-11-23 20:33:23,503 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:33:23,505 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:33:23,509 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:33:23,509 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:33:23,515 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:33:23,518 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:33:23" (1/1) ... [2023-11-23 20:33:23,519 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@422b144d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:23, skipping insertion in model container [2023-11-23 20:33:23,520 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:33:23" (1/1) ... [2023-11-23 20:33:23,571 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:33:23,737 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_c7fc8b34-b091-4cc5-90fd-a28bb951282a/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-2.c[914,927] [2023-11-23 20:33:23,798 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_c7fc8b34-b091-4cc5-90fd-a28bb951282a/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-2.c[7115,7128] [2023-11-23 20:33:23,834 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:33:23,846 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:33:23,860 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_c7fc8b34-b091-4cc5-90fd-a28bb951282a/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-2.c[914,927] [2023-11-23 20:33:23,888 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_c7fc8b34-b091-4cc5-90fd-a28bb951282a/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-2.c[7115,7128] [2023-11-23 20:33:23,911 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:33:23,933 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:33:23,934 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:23 WrapperNode [2023-11-23 20:33:23,934 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:33:23,935 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:33:23,935 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:33:23,935 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:33:23,943 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:23" (1/1) ... [2023-11-23 20:33:23,957 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:23" (1/1) ... [2023-11-23 20:33:24,008 INFO L138 Inliner]: procedures = 55, calls = 61, calls flagged for inlining = 23, calls inlined = 23, statements flattened = 416 [2023-11-23 20:33:24,009 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:33:24,009 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:33:24,010 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:33:24,010 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:33:24,020 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:23" (1/1) ... [2023-11-23 20:33:24,020 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:23" (1/1) ... [2023-11-23 20:33:24,025 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:23" (1/1) ... [2023-11-23 20:33:24,026 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:23" (1/1) ... [2023-11-23 20:33:24,036 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:23" (1/1) ... [2023-11-23 20:33:24,044 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:23" (1/1) ... [2023-11-23 20:33:24,047 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:23" (1/1) ... [2023-11-23 20:33:24,050 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:23" (1/1) ... [2023-11-23 20:33:24,056 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:33:24,057 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:33:24,057 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:33:24,057 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:33:24,058 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:23" (1/1) ... [2023-11-23 20:33:24,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:33:24,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fc8b34-b091-4cc5-90fd-a28bb951282a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:24,093 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fc8b34-b091-4cc5-90fd-a28bb951282a/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:33:24,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fc8b34-b091-4cc5-90fd-a28bb951282a/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:33:24,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:33:24,169 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-23 20:33:24,170 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-23 20:33:24,170 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2023-11-23 20:33:24,170 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2023-11-23 20:33:24,171 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-11-23 20:33:24,171 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-11-23 20:33:24,171 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-11-23 20:33:24,171 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-11-23 20:33:24,172 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2023-11-23 20:33:24,172 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2023-11-23 20:33:24,172 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-11-23 20:33:24,172 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-11-23 20:33:24,173 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-11-23 20:33:24,173 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-11-23 20:33:24,173 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2023-11-23 20:33:24,174 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2023-11-23 20:33:24,174 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2023-11-23 20:33:24,175 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2023-11-23 20:33:24,176 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2023-11-23 20:33:24,177 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2023-11-23 20:33:24,177 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-11-23 20:33:24,177 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-11-23 20:33:24,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:33:24,178 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-11-23 20:33:24,178 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-11-23 20:33:24,179 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2023-11-23 20:33:24,179 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2023-11-23 20:33:24,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:33:24,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:33:24,180 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-11-23 20:33:24,180 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-11-23 20:33:24,180 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2023-11-23 20:33:24,181 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2023-11-23 20:33:24,295 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:33:24,297 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:33:24,849 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:33:25,052 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:33:25,052 INFO L309 CfgBuilder]: Removed 8 assume(true) statements. [2023-11-23 20:33:25,054 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:33:25 BoogieIcfgContainer [2023-11-23 20:33:25,054 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:33:25,057 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:33:25,057 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:33:25,060 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:33:25,060 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:33:23" (1/3) ... [2023-11-23 20:33:25,061 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52562fc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:33:25, skipping insertion in model container [2023-11-23 20:33:25,061 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:23" (2/3) ... [2023-11-23 20:33:25,061 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52562fc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:33:25, skipping insertion in model container [2023-11-23 20:33:25,062 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:33:25" (3/3) ... [2023-11-23 20:33:25,063 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.01.cil-2.c [2023-11-23 20:33:25,083 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:33:25,083 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-23 20:33:25,140 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:33:25,147 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;@3f31be31, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:33:25,147 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-23 20:33:25,152 INFO L276 IsEmpty]: Start isEmpty. Operand has 147 states, 98 states have (on average 1.4795918367346939) internal successors, (145), 106 states have internal predecessors, (145), 31 states have call successors, (31), 15 states have call predecessors, (31), 15 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-23 20:33:25,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-23 20:33:25,163 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:25,164 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] [2023-11-23 20:33:25,164 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:25,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:25,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1150524214, now seen corresponding path program 1 times [2023-11-23 20:33:25,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:25,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012817029] [2023-11-23 20:33:25,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:25,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:25,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:25,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:33:25,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:25,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012817029] [2023-11-23 20:33:25,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012817029] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:25,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:25,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 20:33:25,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990379419] [2023-11-23 20:33:25,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:25,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:33:25,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:25,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:33:25,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:33:25,709 INFO L87 Difference]: Start difference. First operand has 147 states, 98 states have (on average 1.4795918367346939) internal successors, (145), 106 states have internal predecessors, (145), 31 states have call successors, (31), 15 states have call predecessors, (31), 15 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 20:33:26,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:26,539 INFO L93 Difference]: Finished difference Result 519 states and 750 transitions. [2023-11-23 20:33:26,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 20:33:26,546 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2023-11-23 20:33:26,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:26,566 INFO L225 Difference]: With dead ends: 519 [2023-11-23 20:33:26,567 INFO L226 Difference]: Without dead ends: 367 [2023-11-23 20:33:26,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:33:26,576 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 450 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:26,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 480 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 20:33:26,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2023-11-23 20:33:26,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 354. [2023-11-23 20:33:26,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 243 states have (on average 1.3292181069958848) internal successors, (323), 251 states have internal predecessors, (323), 72 states have call successors, (72), 39 states have call predecessors, (72), 37 states have return successors, (86), 65 states have call predecessors, (86), 68 states have call successors, (86) [2023-11-23 20:33:26,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 481 transitions. [2023-11-23 20:33:26,671 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 481 transitions. Word has length 35 [2023-11-23 20:33:26,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:26,672 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 481 transitions. [2023-11-23 20:33:26,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 20:33:26,673 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 481 transitions. [2023-11-23 20:33:26,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-23 20:33:26,676 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:26,677 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] [2023-11-23 20:33:26,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:33:26,677 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:26,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:26,678 INFO L85 PathProgramCache]: Analyzing trace with hash -2145077065, now seen corresponding path program 1 times [2023-11-23 20:33:26,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:26,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506175116] [2023-11-23 20:33:26,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:26,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:26,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:26,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:33:26,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:26,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506175116] [2023-11-23 20:33:26,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506175116] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:26,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:26,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 20:33:26,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22902803] [2023-11-23 20:33:26,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:26,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 20:33:26,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:26,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 20:33:26,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:33:26,873 INFO L87 Difference]: Start difference. First operand 354 states and 481 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-23 20:33:27,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:27,670 INFO L93 Difference]: Finished difference Result 829 states and 1111 transitions. [2023-11-23 20:33:27,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 20:33:27,671 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2023-11-23 20:33:27,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:27,680 INFO L225 Difference]: With dead ends: 829 [2023-11-23 20:33:27,680 INFO L226 Difference]: Without dead ends: 765 [2023-11-23 20:33:27,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-23 20:33:27,683 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 702 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:27,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [709 Valid, 699 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 20:33:27,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2023-11-23 20:33:27,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 694. [2023-11-23 20:33:27,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 480 states have (on average 1.2958333333333334) internal successors, (622), 488 states have internal predecessors, (622), 127 states have call successors, (127), 87 states have call predecessors, (127), 85 states have return successors, (156), 120 states have call predecessors, (156), 123 states have call successors, (156) [2023-11-23 20:33:27,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 905 transitions. [2023-11-23 20:33:27,807 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 905 transitions. Word has length 45 [2023-11-23 20:33:27,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:27,807 INFO L495 AbstractCegarLoop]: Abstraction has 694 states and 905 transitions. [2023-11-23 20:33:27,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-23 20:33:27,808 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 905 transitions. [2023-11-23 20:33:27,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-23 20:33:27,811 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:27,811 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] [2023-11-23 20:33:27,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 20:33:27,812 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:27,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:27,812 INFO L85 PathProgramCache]: Analyzing trace with hash 340702007, now seen corresponding path program 1 times [2023-11-23 20:33:27,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:27,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203667731] [2023-11-23 20:33:27,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:27,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:27,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:28,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:33:28,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:28,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203667731] [2023-11-23 20:33:28,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203667731] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:28,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:28,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 20:33:28,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528140031] [2023-11-23 20:33:28,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:28,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 20:33:28,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:28,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 20:33:28,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-23 20:33:28,104 INFO L87 Difference]: Start difference. First operand 694 states and 905 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-23 20:33:28,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:28,768 INFO L93 Difference]: Finished difference Result 1455 states and 1852 transitions. [2023-11-23 20:33:28,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 20:33:28,768 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2023-11-23 20:33:28,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:28,778 INFO L225 Difference]: With dead ends: 1455 [2023-11-23 20:33:28,778 INFO L226 Difference]: Without dead ends: 1052 [2023-11-23 20:33:28,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-23 20:33:28,782 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 298 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:28,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 513 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 20:33:28,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2023-11-23 20:33:28,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 1023. [2023-11-23 20:33:28,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 703 states have (on average 1.2702702702702702) internal successors, (893), 712 states have internal predecessors, (893), 183 states have call successors, (183), 135 states have call predecessors, (183), 135 states have return successors, (230), 177 states have call predecessors, (230), 179 states have call successors, (230) [2023-11-23 20:33:28,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1306 transitions. [2023-11-23 20:33:28,967 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1306 transitions. Word has length 46 [2023-11-23 20:33:28,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:28,968 INFO L495 AbstractCegarLoop]: Abstraction has 1023 states and 1306 transitions. [2023-11-23 20:33:28,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-23 20:33:28,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1306 transitions. [2023-11-23 20:33:28,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-23 20:33:28,971 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:28,971 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:33:28,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 20:33:28,972 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:28,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:28,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1639830124, now seen corresponding path program 1 times [2023-11-23 20:33:28,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:28,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964250311] [2023-11-23 20:33:28,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:28,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:28,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:29,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:33:29,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:29,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964250311] [2023-11-23 20:33:29,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964250311] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:29,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:29,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:33:29,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539563470] [2023-11-23 20:33:29,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:29,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:33:29,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:29,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:33:29,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:33:29,038 INFO L87 Difference]: Start difference. First operand 1023 states and 1306 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) [2023-11-23 20:33:29,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:29,255 INFO L93 Difference]: Finished difference Result 1964 states and 2465 transitions. [2023-11-23 20:33:29,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:33:29,255 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 [2023-11-23 20:33:29,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:29,265 INFO L225 Difference]: With dead ends: 1964 [2023-11-23 20:33:29,266 INFO L226 Difference]: Without dead ends: 1282 [2023-11-23 20:33:29,268 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 [2023-11-23 20:33:29,270 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 68 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:29,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 304 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:33:29,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2023-11-23 20:33:29,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 1260. [2023-11-23 20:33:29,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1260 states, 864 states have (on average 1.2581018518518519) internal successors, (1087), 873 states have internal predecessors, (1087), 225 states have call successors, (225), 173 states have call predecessors, (225), 169 states have return successors, (276), 215 states have call predecessors, (276), 221 states have call successors, (276) [2023-11-23 20:33:29,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1260 states to 1260 states and 1588 transitions. [2023-11-23 20:33:29,439 INFO L78 Accepts]: Start accepts. Automaton has 1260 states and 1588 transitions. Word has length 47 [2023-11-23 20:33:29,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:29,440 INFO L495 AbstractCegarLoop]: Abstraction has 1260 states and 1588 transitions. [2023-11-23 20:33:29,440 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) [2023-11-23 20:33:29,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1260 states and 1588 transitions. [2023-11-23 20:33:29,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-23 20:33:29,443 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:29,443 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:33:29,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 20:33:29,444 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:29,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:29,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1517982566, now seen corresponding path program 1 times [2023-11-23 20:33:29,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:29,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756999825] [2023-11-23 20:33:29,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:29,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:29,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:29,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:33:29,498 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:29,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756999825] [2023-11-23 20:33:29,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756999825] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:29,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:29,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:33:29,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875337827] [2023-11-23 20:33:29,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:29,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:33:29,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:29,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:33:29,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:33:29,501 INFO L87 Difference]: Start difference. First operand 1260 states and 1588 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 20:33:29,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:29,679 INFO L93 Difference]: Finished difference Result 1666 states and 2078 transitions. [2023-11-23 20:33:29,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:33:29,680 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2023-11-23 20:33:29,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:29,689 INFO L225 Difference]: With dead ends: 1666 [2023-11-23 20:33:29,689 INFO L226 Difference]: Without dead ends: 1111 [2023-11-23 20:33:29,691 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 [2023-11-23 20:33:29,694 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 159 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:29,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 229 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:33:29,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2023-11-23 20:33:29,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 905. [2023-11-23 20:33:29,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 628 states have (on average 1.2484076433121019) internal successors, (784), 636 states have internal predecessors, (784), 162 states have call successors, (162), 119 states have call predecessors, (162), 113 states have return successors, (184), 151 states have call predecessors, (184), 158 states have call successors, (184) [2023-11-23 20:33:29,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1130 transitions. [2023-11-23 20:33:29,817 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1130 transitions. Word has length 53 [2023-11-23 20:33:29,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:29,818 INFO L495 AbstractCegarLoop]: Abstraction has 905 states and 1130 transitions. [2023-11-23 20:33:29,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 20:33:29,818 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1130 transitions. [2023-11-23 20:33:29,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-23 20:33:29,820 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:29,820 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] [2023-11-23 20:33:29,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 20:33:29,820 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:29,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:29,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1961977813, now seen corresponding path program 1 times [2023-11-23 20:33:29,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:29,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839498322] [2023-11-23 20:33:29,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:29,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:29,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:29,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:33:29,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:29,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839498322] [2023-11-23 20:33:29,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839498322] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:29,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:29,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:33:29,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379600519] [2023-11-23 20:33:29,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:29,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:33:29,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:29,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:33:29,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:33:29,948 INFO L87 Difference]: Start difference. First operand 905 states and 1130 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) [2023-11-23 20:33:30,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:30,226 INFO L93 Difference]: Finished difference Result 1160 states and 1431 transitions. [2023-11-23 20:33:30,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:33:30,227 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 [2023-11-23 20:33:30,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:30,235 INFO L225 Difference]: With dead ends: 1160 [2023-11-23 20:33:30,235 INFO L226 Difference]: Without dead ends: 1157 [2023-11-23 20:33:30,236 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 [2023-11-23 20:33:30,244 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 297 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:30,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 205 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:33:30,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2023-11-23 20:33:30,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 904. [2023-11-23 20:33:30,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 628 states have (on average 1.2388535031847134) internal successors, (778), 635 states have internal predecessors, (778), 161 states have call successors, (161), 119 states have call predecessors, (161), 113 states have return successors, (184), 151 states have call predecessors, (184), 158 states have call successors, (184) [2023-11-23 20:33:30,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1123 transitions. [2023-11-23 20:33:30,372 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1123 transitions. Word has length 54 [2023-11-23 20:33:30,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:30,372 INFO L495 AbstractCegarLoop]: Abstraction has 904 states and 1123 transitions. [2023-11-23 20:33:30,373 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) [2023-11-23 20:33:30,373 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1123 transitions. [2023-11-23 20:33:30,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-23 20:33:30,374 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:30,374 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] [2023-11-23 20:33:30,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 20:33:30,375 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:30,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:30,375 INFO L85 PathProgramCache]: Analyzing trace with hash 691113725, now seen corresponding path program 1 times [2023-11-23 20:33:30,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:30,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489700447] [2023-11-23 20:33:30,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:30,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:30,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:30,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:33:30,515 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:30,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489700447] [2023-11-23 20:33:30,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489700447] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:33:30,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97403813] [2023-11-23 20:33:30,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:30,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:30,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fc8b34-b091-4cc5-90fd-a28bb951282a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:30,522 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fc8b34-b091-4cc5-90fd-a28bb951282a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:30,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fc8b34-b091-4cc5-90fd-a28bb951282a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:33:30,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:30,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 20:33:30,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:30,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:33:30,986 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:33:31,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:33:31,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97403813] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:33:31,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2003041627] [2023-11-23 20:33:31,112 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-11-23 20:33:31,112 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:33:31,116 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:33:31,123 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:33:31,123 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:33:34,203 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 101 for LOIs [2023-11-23 20:33:34,257 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 97 for LOIs [2023-11-23 20:33:34,321 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 105 for LOIs [2023-11-23 20:33:34,921 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 101 for LOIs [2023-11-23 20:33:35,035 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 101 for LOIs [2023-11-23 20:33:35,162 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 101 for LOIs [2023-11-23 20:33:35,213 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 108 for LOIs [2023-11-23 20:33:35,255 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:33:43,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2003041627] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:43,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:33:43,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [5, 5, 4] total 41 [2023-11-23 20:33:43,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573797935] [2023-11-23 20:33:43,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:43,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-23 20:33:43,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:43,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-23 20:33:43,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1447, Unknown=0, NotChecked=0, Total=1640 [2023-11-23 20:33:43,815 INFO L87 Difference]: Start difference. First operand 904 states and 1123 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) [2023-11-23 20:33:58,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:58,367 INFO L93 Difference]: Finished difference Result 1565 states and 1897 transitions. [2023-11-23 20:33:58,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-23 20:33:58,368 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 55 [2023-11-23 20:33:58,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:58,375 INFO L225 Difference]: With dead ends: 1565 [2023-11-23 20:33:58,375 INFO L226 Difference]: Without dead ends: 952 [2023-11-23 20:33:58,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 126 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=601, Invalid=4091, Unknown=0, NotChecked=0, Total=4692 [2023-11-23 20:33:58,380 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 143 mSDsluCounter, 1871 mSDsCounter, 0 mSdLazyCounter, 3376 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 2003 SdHoareTripleChecker+Invalid, 3500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 3376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:58,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 2003 Invalid, 3500 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [124 Valid, 3376 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2023-11-23 20:33:58,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2023-11-23 20:33:58,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 937. [2023-11-23 20:33:58,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 653 states have (on average 1.231240428790199) internal successors, (804), 660 states have internal predecessors, (804), 163 states have call successors, (163), 125 states have call predecessors, (163), 119 states have return successors, (186), 153 states have call predecessors, (186), 160 states have call successors, (186) [2023-11-23 20:33:58,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 1153 transitions. [2023-11-23 20:33:58,529 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 1153 transitions. Word has length 55 [2023-11-23 20:33:58,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:58,529 INFO L495 AbstractCegarLoop]: Abstraction has 937 states and 1153 transitions. [2023-11-23 20:33:58,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2023-11-23 20:33:58,530 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 1153 transitions. [2023-11-23 20:33:58,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-23 20:33:58,534 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:58,534 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:33:58,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fc8b34-b091-4cc5-90fd-a28bb951282a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:58,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fc8b34-b091-4cc5-90fd-a28bb951282a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:58,757 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:58,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:58,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1367952006, now seen corresponding path program 1 times [2023-11-23 20:33:58,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:58,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621996752] [2023-11-23 20:33:58,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:58,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:58,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:58,827 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:33:58,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:58,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621996752] [2023-11-23 20:33:58,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621996752] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:58,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:58,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:33:58,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075112650] [2023-11-23 20:33:58,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:58,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:33:58,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:58,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:33:58,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:33:58,831 INFO L87 Difference]: Start difference. First operand 937 states and 1153 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 20:33:59,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:59,033 INFO L93 Difference]: Finished difference Result 1519 states and 1836 transitions. [2023-11-23 20:33:59,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:33:59,034 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2023-11-23 20:33:59,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:59,042 INFO L225 Difference]: With dead ends: 1519 [2023-11-23 20:33:59,042 INFO L226 Difference]: Without dead ends: 1146 [2023-11-23 20:33:59,044 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 [2023-11-23 20:33:59,045 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 43 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:59,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 348 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:33:59,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146 states. [2023-11-23 20:33:59,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1146 to 1058. [2023-11-23 20:33:59,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 734 states have (on average 1.2220708446866484) internal successors, (897), 745 states have internal predecessors, (897), 185 states have call successors, (185), 147 states have call predecessors, (185), 137 states have return successors, (208), 167 states have call predecessors, (208), 182 states have call successors, (208) [2023-11-23 20:33:59,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 1290 transitions. [2023-11-23 20:33:59,197 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 1290 transitions. Word has length 61 [2023-11-23 20:33:59,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:59,197 INFO L495 AbstractCegarLoop]: Abstraction has 1058 states and 1290 transitions. [2023-11-23 20:33:59,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 20:33:59,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 1290 transitions. [2023-11-23 20:33:59,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-23 20:33:59,199 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:59,199 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:33:59,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 20:33:59,200 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:59,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:59,200 INFO L85 PathProgramCache]: Analyzing trace with hash 887004113, now seen corresponding path program 1 times [2023-11-23 20:33:59,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:59,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42120908] [2023-11-23 20:33:59,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:59,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:59,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:59,428 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-23 20:33:59,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:59,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42120908] [2023-11-23 20:33:59,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42120908] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:59,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:59,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 20:33:59,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462371275] [2023-11-23 20:33:59,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:59,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 20:33:59,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:59,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 20:33:59,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:33:59,432 INFO L87 Difference]: Start difference. First operand 1058 states and 1290 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-23 20:33:59,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:59,878 INFO L93 Difference]: Finished difference Result 1493 states and 1879 transitions. [2023-11-23 20:33:59,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 20:33:59,879 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 61 [2023-11-23 20:33:59,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:59,888 INFO L225 Difference]: With dead ends: 1493 [2023-11-23 20:33:59,888 INFO L226 Difference]: Without dead ends: 1214 [2023-11-23 20:33:59,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2023-11-23 20:33:59,892 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 372 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:59,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [392 Valid, 306 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:33:59,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2023-11-23 20:34:00,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 1210. [2023-11-23 20:34:00,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 838 states have (on average 1.224343675417661) internal successors, (1026), 851 states have internal predecessors, (1026), 215 states have call successors, (215), 165 states have call predecessors, (215), 155 states have return successors, (250), 195 states have call predecessors, (250), 212 states have call successors, (250) [2023-11-23 20:34:00,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1491 transitions. [2023-11-23 20:34:00,107 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1491 transitions. Word has length 61 [2023-11-23 20:34:00,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:00,108 INFO L495 AbstractCegarLoop]: Abstraction has 1210 states and 1491 transitions. [2023-11-23 20:34:00,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-23 20:34:00,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1491 transitions. [2023-11-23 20:34:00,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-23 20:34:00,110 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:00,110 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:34:00,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 20:34:00,111 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:00,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:00,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1835476662, now seen corresponding path program 1 times [2023-11-23 20:34:00,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:00,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325155702] [2023-11-23 20:34:00,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:00,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:00,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:00,305 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:34:00,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:00,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325155702] [2023-11-23 20:34:00,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325155702] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:00,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:34:00,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 20:34:00,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768198638] [2023-11-23 20:34:00,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:00,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 20:34:00,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:00,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 20:34:00,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-23 20:34:00,308 INFO L87 Difference]: Start difference. First operand 1210 states and 1491 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-23 20:34:00,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:00,979 INFO L93 Difference]: Finished difference Result 2207 states and 2651 transitions. [2023-11-23 20:34:00,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 20:34:00,980 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 63 [2023-11-23 20:34:00,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:00,989 INFO L225 Difference]: With dead ends: 2207 [2023-11-23 20:34:00,990 INFO L226 Difference]: Without dead ends: 1521 [2023-11-23 20:34:00,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-23 20:34:00,993 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 277 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:00,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 477 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 20:34:00,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1521 states. [2023-11-23 20:34:01,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1521 to 1390. [2023-11-23 20:34:01,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 958 states have (on average 1.2056367432150312) internal successors, (1155), 971 states have internal predecessors, (1155), 247 states have call successors, (247), 193 states have call predecessors, (247), 183 states have return successors, (282), 227 states have call predecessors, (282), 244 states have call successors, (282) [2023-11-23 20:34:01,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 1684 transitions. [2023-11-23 20:34:01,194 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 1684 transitions. Word has length 63 [2023-11-23 20:34:01,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:01,194 INFO L495 AbstractCegarLoop]: Abstraction has 1390 states and 1684 transitions. [2023-11-23 20:34:01,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-23 20:34:01,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 1684 transitions. [2023-11-23 20:34:01,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-23 20:34:01,196 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:01,197 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:34:01,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-23 20:34:01,197 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:01,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:01,197 INFO L85 PathProgramCache]: Analyzing trace with hash 724435062, now seen corresponding path program 1 times [2023-11-23 20:34:01,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:01,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354603292] [2023-11-23 20:34:01,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:01,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:01,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:01,261 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-23 20:34:01,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:01,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354603292] [2023-11-23 20:34:01,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354603292] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:01,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:34:01,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:34:01,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625476149] [2023-11-23 20:34:01,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:01,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:34:01,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:01,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:34:01,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:34:01,263 INFO L87 Difference]: Start difference. First operand 1390 states and 1684 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 20:34:01,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:01,515 INFO L93 Difference]: Finished difference Result 1861 states and 2329 transitions. [2023-11-23 20:34:01,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:34:01,516 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 63 [2023-11-23 20:34:01,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:01,525 INFO L225 Difference]: With dead ends: 1861 [2023-11-23 20:34:01,525 INFO L226 Difference]: Without dead ends: 1483 [2023-11-23 20:34:01,527 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 [2023-11-23 20:34:01,528 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 28 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:01,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 341 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:34:01,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1483 states. [2023-11-23 20:34:01,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1483 to 1427. [2023-11-23 20:34:01,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1427 states, 989 states have (on average 1.2093023255813953) internal successors, (1196), 1002 states have internal predecessors, (1196), 250 states have call successors, (250), 196 states have call predecessors, (250), 186 states have return successors, (285), 230 states have call predecessors, (285), 247 states have call successors, (285) [2023-11-23 20:34:01,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1427 states to 1427 states and 1731 transitions. [2023-11-23 20:34:01,744 INFO L78 Accepts]: Start accepts. Automaton has 1427 states and 1731 transitions. Word has length 63 [2023-11-23 20:34:01,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:01,745 INFO L495 AbstractCegarLoop]: Abstraction has 1427 states and 1731 transitions. [2023-11-23 20:34:01,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 20:34:01,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1427 states and 1731 transitions. [2023-11-23 20:34:01,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-23 20:34:01,751 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:01,752 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:34:01,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-23 20:34:01,752 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:01,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:01,752 INFO L85 PathProgramCache]: Analyzing trace with hash 549833238, now seen corresponding path program 1 times [2023-11-23 20:34:01,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:01,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774340854] [2023-11-23 20:34:01,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:01,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:01,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:01,874 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:34:01,874 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:01,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774340854] [2023-11-23 20:34:01,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774340854] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:34:01,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169162554] [2023-11-23 20:34:01,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:01,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:34:01,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fc8b34-b091-4cc5-90fd-a28bb951282a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:34:01,876 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fc8b34-b091-4cc5-90fd-a28bb951282a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:34:01,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fc8b34-b091-4cc5-90fd-a28bb951282a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 20:34:01,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:01,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 20:34:01,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:34:02,149 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:34:02,149 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:34:02,220 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:34:02,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169162554] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:34:02,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1833988105] [2023-11-23 20:34:02,226 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-11-23 20:34:02,226 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:34:02,228 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:34:02,228 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:34:02,228 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:34:06,257 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 101 for LOIs [2023-11-23 20:34:06,298 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 100 for LOIs [2023-11-23 20:34:06,415 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 70 for LOIs [2023-11-23 20:34:06,487 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 105 for LOIs [2023-11-23 20:34:07,081 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 101 for LOIs [2023-11-23 20:34:07,167 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 101 for LOIs [2023-11-23 20:34:07,278 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 101 for LOIs [2023-11-23 20:34:07,327 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 108 for LOIs [2023-11-23 20:34:07,376 INFO L180 IcfgInterpreter]: Interpretation finished