./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945277c1-b05d-48d3-8105-99c31d6503ba/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945277c1-b05d-48d3-8105-99c31d6503ba/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_945277c1-b05d-48d3-8105-99c31d6503ba/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945277c1-b05d-48d3-8105-99c31d6503ba/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945277c1-b05d-48d3-8105-99c31d6503ba/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_945277c1-b05d-48d3-8105-99c31d6503ba/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 0792bb078b549cb8c62d642eddb09d42b03fb2451c67a454a8e8576be6796f29 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:34:26,294 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:34:26,422 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945277c1-b05d-48d3-8105-99c31d6503ba/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 20:34:26,427 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:34:26,428 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:34:26,497 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:34:26,497 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:34:26,498 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:34:26,499 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:34:26,504 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:34:26,505 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:34:26,506 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:34:26,506 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:34:26,508 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:34:26,509 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:34:26,509 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:34:26,509 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:34:26,510 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:34:26,510 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:34:26,511 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:34:26,511 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:34:26,512 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:34:26,513 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:34:26,514 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:34:26,514 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:34:26,515 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:34:26,515 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:34:26,515 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:34:26,516 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:34:26,516 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:34:26,518 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:34:26,518 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:34:26,518 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:34:26,518 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:34:26,519 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:34:26,530 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:34:26,530 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:34:26,530 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:34:26,531 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:34:26,531 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:34:26,532 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:34:26,532 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:34:26,532 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:34:26,533 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:34:26,533 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:34:26,533 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:34:26,534 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:34:26,534 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_945277c1-b05d-48d3-8105-99c31d6503ba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945277c1-b05d-48d3-8105-99c31d6503ba/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0792bb078b549cb8c62d642eddb09d42b03fb2451c67a454a8e8576be6796f29 [2023-11-23 20:34:26,841 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:34:26,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:34:26,909 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:34:26,911 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:34:26,912 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:34:26,913 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945277c1-b05d-48d3-8105-99c31d6503ba/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-1.c [2023-11-23 20:34:30,203 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:34:30,549 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:34:30,549 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945277c1-b05d-48d3-8105-99c31d6503ba/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-1.c [2023-11-23 20:34:30,568 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945277c1-b05d-48d3-8105-99c31d6503ba/bin/utaipan-verify-mE87zJ7Ire/data/44c0ab9d0/50328bc2bcf84fb4abb5230444d956f5/FLAG6d357a454 [2023-11-23 20:34:30,589 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945277c1-b05d-48d3-8105-99c31d6503ba/bin/utaipan-verify-mE87zJ7Ire/data/44c0ab9d0/50328bc2bcf84fb4abb5230444d956f5 [2023-11-23 20:34:30,595 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:34:30,597 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:34:30,599 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:34:30,600 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:34:30,608 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:34:30,609 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:34:30" (1/1) ... [2023-11-23 20:34:30,610 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c7a64aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:30, skipping insertion in model container [2023-11-23 20:34:30,611 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:34:30" (1/1) ... [2023-11-23 20:34:30,699 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:34:30,894 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_945277c1-b05d-48d3-8105-99c31d6503ba/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-1.c[914,927] [2023-11-23 20:34:30,980 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_945277c1-b05d-48d3-8105-99c31d6503ba/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-1.c[7115,7128] [2023-11-23 20:34:31,032 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:34:31,056 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:34:31,073 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_945277c1-b05d-48d3-8105-99c31d6503ba/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-1.c[914,927] [2023-11-23 20:34:31,115 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_945277c1-b05d-48d3-8105-99c31d6503ba/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-1.c[7115,7128] [2023-11-23 20:34:31,159 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:34:31,194 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:34:31,195 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:31 WrapperNode [2023-11-23 20:34:31,195 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:34:31,196 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:34:31,196 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:34:31,197 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:34:31,204 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:31" (1/1) ... [2023-11-23 20:34:31,220 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:31" (1/1) ... [2023-11-23 20:34:31,268 INFO L138 Inliner]: procedures = 57, calls = 63, calls flagged for inlining = 26, calls inlined = 26, statements flattened = 470 [2023-11-23 20:34:31,269 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:34:31,270 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:34:31,270 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:34:31,270 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:34:31,283 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:31" (1/1) ... [2023-11-23 20:34:31,283 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:31" (1/1) ... [2023-11-23 20:34:31,288 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:31" (1/1) ... [2023-11-23 20:34:31,289 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:31" (1/1) ... [2023-11-23 20:34:31,303 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:31" (1/1) ... [2023-11-23 20:34:31,317 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:31" (1/1) ... [2023-11-23 20:34:31,322 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:31" (1/1) ... [2023-11-23 20:34:31,325 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:31" (1/1) ... [2023-11-23 20:34:31,331 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:34:31,332 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:34:31,333 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:34:31,333 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:34:31,334 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:31" (1/1) ... [2023-11-23 20:34:31,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:34:31,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945277c1-b05d-48d3-8105-99c31d6503ba/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:34:31,392 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945277c1-b05d-48d3-8105-99c31d6503ba/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:34:31,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945277c1-b05d-48d3-8105-99c31d6503ba/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:34:31,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:34:31,449 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-23 20:34:31,449 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-23 20:34:31,449 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2023-11-23 20:34:31,449 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2023-11-23 20:34:31,449 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-11-23 20:34:31,450 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-11-23 20:34:31,450 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-11-23 20:34:31,450 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-11-23 20:34:31,450 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2023-11-23 20:34:31,451 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2023-11-23 20:34:31,451 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-11-23 20:34:31,451 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-11-23 20:34:31,451 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-11-23 20:34:31,452 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-11-23 20:34:31,452 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2023-11-23 20:34:31,452 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2023-11-23 20:34:31,452 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2023-11-23 20:34:31,452 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2023-11-23 20:34:31,453 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2023-11-23 20:34:31,453 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2023-11-23 20:34:31,453 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-11-23 20:34:31,453 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-11-23 20:34:31,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:34:31,454 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-11-23 20:34:31,454 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-11-23 20:34:31,454 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2023-11-23 20:34:31,454 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2023-11-23 20:34:31,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:34:31,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:34:31,455 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-11-23 20:34:31,455 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-11-23 20:34:31,619 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:34:31,624 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:34:32,267 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:34:32,527 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:34:32,527 INFO L309 CfgBuilder]: Removed 9 assume(true) statements. [2023-11-23 20:34:32,529 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:34:32 BoogieIcfgContainer [2023-11-23 20:34:32,530 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:34:32,533 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:34:32,533 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:34:32,537 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:34:32,537 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:34:30" (1/3) ... [2023-11-23 20:34:32,538 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@209821b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:34:32, skipping insertion in model container [2023-11-23 20:34:32,538 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:31" (2/3) ... [2023-11-23 20:34:32,540 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@209821b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:34:32, skipping insertion in model container [2023-11-23 20:34:32,541 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:34:32" (3/3) ... [2023-11-23 20:34:32,543 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.02.cil-1.c [2023-11-23 20:34:32,564 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:34:32,564 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-23 20:34:32,641 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:34:32,648 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;@6fb51d70, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:34:32,649 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-23 20:34:32,655 INFO L276 IsEmpty]: Start isEmpty. Operand has 153 states, 106 states have (on average 1.471698113207547) internal successors, (156), 112 states have internal predecessors, (156), 30 states have call successors, (30), 14 states have call predecessors, (30), 14 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-23 20:34:32,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-23 20:34:32,671 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:32,671 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] [2023-11-23 20:34:32,672 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:32,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:32,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1558148514, now seen corresponding path program 1 times [2023-11-23 20:34:32,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:32,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516909768] [2023-11-23 20:34:32,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:32,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:32,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:33,243 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 20:34:33,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:33,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516909768] [2023-11-23 20:34:33,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516909768] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:33,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:34:33,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 20:34:33,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948748478] [2023-11-23 20:34:33,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:33,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:34:33,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:33,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:34:33,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:34:33,301 INFO L87 Difference]: Start difference. First operand has 153 states, 106 states have (on average 1.471698113207547) internal successors, (156), 112 states have internal predecessors, (156), 30 states have call successors, (30), 14 states have call predecessors, (30), 14 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 20:34:33,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:33,999 INFO L93 Difference]: Finished difference Result 575 states and 841 transitions. [2023-11-23 20:34:34,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 20:34:34,002 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2023-11-23 20:34:34,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:34,019 INFO L225 Difference]: With dead ends: 575 [2023-11-23 20:34:34,019 INFO L226 Difference]: Without dead ends: 417 [2023-11-23 20:34:34,024 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 20:34:34,028 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 552 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:34,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [554 Valid, 525 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 20:34:34,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2023-11-23 20:34:34,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 406. [2023-11-23 20:34:34,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 292 states have (on average 1.356164383561644) internal successors, (396), 299 states have internal predecessors, (396), 75 states have call successors, (75), 38 states have call predecessors, (75), 37 states have return successors, (95), 70 states have call predecessors, (95), 73 states have call successors, (95) [2023-11-23 20:34:34,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 566 transitions. [2023-11-23 20:34:34,147 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 566 transitions. Word has length 37 [2023-11-23 20:34:34,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:34,147 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 566 transitions. [2023-11-23 20:34:34,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 20:34:34,148 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 566 transitions. [2023-11-23 20:34:34,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-23 20:34:34,152 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:34,152 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 20:34:34,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:34:34,152 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:34,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:34,153 INFO L85 PathProgramCache]: Analyzing trace with hash -619495534, now seen corresponding path program 1 times [2023-11-23 20:34:34,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:34,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950949033] [2023-11-23 20:34:34,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:34,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:34,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:34,250 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 20:34:34,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:34,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950949033] [2023-11-23 20:34:34,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950949033] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:34,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:34:34,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:34:34,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042927826] [2023-11-23 20:34:34,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:34,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:34:34,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:34,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:34:34,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:34:34,255 INFO L87 Difference]: Start difference. First operand 406 states and 566 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-23 20:34:34,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:34,553 INFO L93 Difference]: Finished difference Result 530 states and 728 transitions. [2023-11-23 20:34:34,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:34:34,554 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2023-11-23 20:34:34,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:34,565 INFO L225 Difference]: With dead ends: 530 [2023-11-23 20:34:34,565 INFO L226 Difference]: Without dead ends: 466 [2023-11-23 20:34:34,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:34:34,568 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 256 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:34,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 368 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:34:34,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2023-11-23 20:34:34,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 459. [2023-11-23 20:34:34,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 330 states have (on average 1.3424242424242425) internal successors, (443), 337 states have internal predecessors, (443), 83 states have call successors, (83), 45 states have call predecessors, (83), 44 states have return successors, (103), 78 states have call predecessors, (103), 81 states have call successors, (103) [2023-11-23 20:34:34,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 629 transitions. [2023-11-23 20:34:34,674 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 629 transitions. Word has length 45 [2023-11-23 20:34:34,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:34,674 INFO L495 AbstractCegarLoop]: Abstraction has 459 states and 629 transitions. [2023-11-23 20:34:34,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-23 20:34:34,675 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 629 transitions. [2023-11-23 20:34:34,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-23 20:34:34,678 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:34,678 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 20:34:34,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 20:34:34,679 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:34,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:34,680 INFO L85 PathProgramCache]: Analyzing trace with hash 299479089, now seen corresponding path program 1 times [2023-11-23 20:34:34,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:34,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144428672] [2023-11-23 20:34:34,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:34,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:34,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:34,819 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 20:34:34,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:34,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144428672] [2023-11-23 20:34:34,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144428672] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:34,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:34:34,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 20:34:34,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652845378] [2023-11-23 20:34:34,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:34,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 20:34:34,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:34,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 20:34:34,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:34:34,825 INFO L87 Difference]: Start difference. First operand 459 states and 629 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 20:34:35,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:35,446 INFO L93 Difference]: Finished difference Result 861 states and 1132 transitions. [2023-11-23 20:34:35,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 20:34:35,447 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 20:34:35,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:35,457 INFO L225 Difference]: With dead ends: 861 [2023-11-23 20:34:35,457 INFO L226 Difference]: Without dead ends: 729 [2023-11-23 20:34:35,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-23 20:34:35,468 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 594 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:35,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [598 Valid, 696 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 20:34:35,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2023-11-23 20:34:35,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 645. [2023-11-23 20:34:35,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 462 states have (on average 1.3051948051948052) internal successors, (603), 470 states have internal predecessors, (603), 110 states have call successors, (110), 68 states have call predecessors, (110), 71 states have return successors, (134), 108 states have call predecessors, (134), 108 states have call successors, (134) [2023-11-23 20:34:35,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 847 transitions. [2023-11-23 20:34:35,621 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 847 transitions. Word has length 45 [2023-11-23 20:34:35,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:35,622 INFO L495 AbstractCegarLoop]: Abstraction has 645 states and 847 transitions. [2023-11-23 20:34:35,622 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 20:34:35,622 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 847 transitions. [2023-11-23 20:34:35,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-23 20:34:35,629 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:35,630 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 20:34:35,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 20:34:35,630 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:35,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:35,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1733252916, now seen corresponding path program 1 times [2023-11-23 20:34:35,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:35,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288690764] [2023-11-23 20:34:35,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:35,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:35,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:35,884 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 20:34:35,884 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:35,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288690764] [2023-11-23 20:34:35,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288690764] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:35,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:34:35,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 20:34:35,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053198792] [2023-11-23 20:34:35,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:35,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 20:34:35,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:35,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 20:34:35,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-23 20:34:35,887 INFO L87 Difference]: Start difference. First operand 645 states and 847 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 20:34:36,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:36,594 INFO L93 Difference]: Finished difference Result 1161 states and 1463 transitions. [2023-11-23 20:34:36,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 20:34:36,595 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 20:34:36,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:36,602 INFO L225 Difference]: With dead ends: 1161 [2023-11-23 20:34:36,603 INFO L226 Difference]: Without dead ends: 859 [2023-11-23 20:34:36,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-23 20:34:36,617 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 307 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:36,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 605 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 20:34:36,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2023-11-23 20:34:36,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 824. [2023-11-23 20:34:36,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 587 states have (on average 1.2862010221465077) internal successors, (755), 596 states have internal predecessors, (755), 137 states have call successors, (137), 91 states have call predecessors, (137), 98 states have return successors, (165), 138 states have call predecessors, (165), 135 states have call successors, (165) [2023-11-23 20:34:36,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1057 transitions. [2023-11-23 20:34:36,736 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1057 transitions. Word has length 46 [2023-11-23 20:34:36,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:36,738 INFO L495 AbstractCegarLoop]: Abstraction has 824 states and 1057 transitions. [2023-11-23 20:34:36,738 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 20:34:36,738 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1057 transitions. [2023-11-23 20:34:36,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-23 20:34:36,740 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:36,741 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 20:34:36,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 20:34:36,741 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:36,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:36,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1420471490, now seen corresponding path program 1 times [2023-11-23 20:34:36,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:36,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283104671] [2023-11-23 20:34:36,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:36,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:36,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:36,839 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 20:34:36,839 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:36,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283104671] [2023-11-23 20:34:36,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283104671] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:36,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:34:36,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:34:36,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927114920] [2023-11-23 20:34:36,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:36,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:34:36,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:36,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:34:36,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:34:36,843 INFO L87 Difference]: Start difference. First operand 824 states and 1057 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 20:34:37,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:37,017 INFO L93 Difference]: Finished difference Result 1388 states and 1727 transitions. [2023-11-23 20:34:37,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:34:37,017 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 20:34:37,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:37,025 INFO L225 Difference]: With dead ends: 1388 [2023-11-23 20:34:37,025 INFO L226 Difference]: Without dead ends: 956 [2023-11-23 20:34:37,027 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 20:34:37,028 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 67 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:37,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 319 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:34:37,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2023-11-23 20:34:37,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 851. [2023-11-23 20:34:37,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 610 states have (on average 1.278688524590164) internal successors, (780), 619 states have internal predecessors, (780), 139 states have call successors, (139), 93 states have call predecessors, (139), 100 states have return successors, (167), 140 states have call predecessors, (167), 137 states have call successors, (167) [2023-11-23 20:34:37,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1086 transitions. [2023-11-23 20:34:37,153 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1086 transitions. Word has length 47 [2023-11-23 20:34:37,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:37,154 INFO L495 AbstractCegarLoop]: Abstraction has 851 states and 1086 transitions. [2023-11-23 20:34:37,157 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 20:34:37,158 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1086 transitions. [2023-11-23 20:34:37,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-23 20:34:37,161 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:37,161 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 20:34:37,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 20:34:37,162 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:37,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:37,162 INFO L85 PathProgramCache]: Analyzing trace with hash -493605484, now seen corresponding path program 1 times [2023-11-23 20:34:37,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:37,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664857930] [2023-11-23 20:34:37,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:37,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:37,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:37,252 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 20:34:37,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:37,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664857930] [2023-11-23 20:34:37,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664857930] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:37,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:34:37,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:34:37,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677078970] [2023-11-23 20:34:37,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:37,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:34:37,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:37,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:34:37,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:34:37,256 INFO L87 Difference]: Start difference. First operand 851 states and 1086 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 20:34:37,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:37,409 INFO L93 Difference]: Finished difference Result 1041 states and 1307 transitions. [2023-11-23 20:34:37,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:34:37,410 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 20:34:37,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:37,416 INFO L225 Difference]: With dead ends: 1041 [2023-11-23 20:34:37,417 INFO L226 Difference]: Without dead ends: 768 [2023-11-23 20:34:37,418 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 20:34:37,419 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 169 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:37,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 238 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:34:37,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2023-11-23 20:34:37,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 659. [2023-11-23 20:34:37,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 470 states have (on average 1.2723404255319148) internal successors, (598), 477 states have internal predecessors, (598), 115 states have call successors, (115), 73 states have call predecessors, (115), 72 states have return successors, (135), 110 states have call predecessors, (135), 113 states have call successors, (135) [2023-11-23 20:34:37,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 848 transitions. [2023-11-23 20:34:37,517 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 848 transitions. Word has length 53 [2023-11-23 20:34:37,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:37,518 INFO L495 AbstractCegarLoop]: Abstraction has 659 states and 848 transitions. [2023-11-23 20:34:37,518 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 20:34:37,518 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 848 transitions. [2023-11-23 20:34:37,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-23 20:34:37,521 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:37,521 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 20:34:37,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 20:34:37,521 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:37,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:37,522 INFO L85 PathProgramCache]: Analyzing trace with hash -2016316846, now seen corresponding path program 1 times [2023-11-23 20:34:37,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:37,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929026436] [2023-11-23 20:34:37,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:37,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:37,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:37,630 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 20:34:37,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:37,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929026436] [2023-11-23 20:34:37,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929026436] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:37,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:34:37,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:34:37,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953879817] [2023-11-23 20:34:37,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:37,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:34:37,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:37,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:34:37,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:34:37,633 INFO L87 Difference]: Start difference. First operand 659 states and 848 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 20:34:37,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:37,919 INFO L93 Difference]: Finished difference Result 762 states and 964 transitions. [2023-11-23 20:34:37,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:34:37,920 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 20:34:37,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:37,928 INFO L225 Difference]: With dead ends: 762 [2023-11-23 20:34:37,929 INFO L226 Difference]: Without dead ends: 759 [2023-11-23 20:34:37,930 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 20:34:37,931 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 315 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:37,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 209 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:34:37,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2023-11-23 20:34:38,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 658. [2023-11-23 20:34:38,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 470 states have (on average 1.2659574468085106) internal successors, (595), 476 states have internal predecessors, (595), 114 states have call successors, (114), 73 states have call predecessors, (114), 72 states have return successors, (135), 110 states have call predecessors, (135), 113 states have call successors, (135) [2023-11-23 20:34:38,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 844 transitions. [2023-11-23 20:34:38,055 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 844 transitions. Word has length 54 [2023-11-23 20:34:38,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:38,056 INFO L495 AbstractCegarLoop]: Abstraction has 658 states and 844 transitions. [2023-11-23 20:34:38,057 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 20:34:38,057 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 844 transitions. [2023-11-23 20:34:38,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-23 20:34:38,059 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:38,059 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 20:34:38,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 20:34:38,060 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:38,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:38,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1917984295, now seen corresponding path program 1 times [2023-11-23 20:34:38,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:38,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493125921] [2023-11-23 20:34:38,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:38,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:38,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:38,255 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 20:34:38,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:38,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493125921] [2023-11-23 20:34:38,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493125921] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:34:38,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538313827] [2023-11-23 20:34:38,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:38,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:34:38,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945277c1-b05d-48d3-8105-99c31d6503ba/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:34:38,260 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945277c1-b05d-48d3-8105-99c31d6503ba/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:34:38,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945277c1-b05d-48d3-8105-99c31d6503ba/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:34:38,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:38,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 20:34:38,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:34:38,759 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 20:34:38,759 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:34:38,867 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 20:34:38,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538313827] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:34:38,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [71144405] [2023-11-23 20:34:38,895 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-11-23 20:34:38,895 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:34:38,900 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:34:38,905 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:34:38,906 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:34:42,224 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 111 for LOIs [2023-11-23 20:34:42,269 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 107 for LOIs [2023-11-23 20:34:42,335 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 115 for LOIs [2023-11-23 20:34:43,003 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 111 for LOIs [2023-11-23 20:34:43,104 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 111 for LOIs [2023-11-23 20:34:43,204 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 111 for LOIs [2023-11-23 20:34:43,240 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 118 for LOIs [2023-11-23 20:34:43,275 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:34:54,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [71144405] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:54,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:34:54,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [5, 5, 4] total 41 [2023-11-23 20:34:54,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698511073] [2023-11-23 20:34:54,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:54,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-23 20:34:54,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:54,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-23 20:34:54,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1447, Unknown=0, NotChecked=0, Total=1640 [2023-11-23 20:34:54,111 INFO L87 Difference]: Start difference. First operand 658 states and 844 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 20:35:10,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:10,943 INFO L93 Difference]: Finished difference Result 1022 states and 1255 transitions. [2023-11-23 20:35:10,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-23 20:35:10,943 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 20:35:10,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:10,948 INFO L225 Difference]: With dead ends: 1022 [2023-11-23 20:35:10,948 INFO L226 Difference]: Without dead ends: 707 [2023-11-23 20:35:10,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 126 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=601, Invalid=4091, Unknown=0, NotChecked=0, Total=4692 [2023-11-23 20:35:10,952 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 188 mSDsluCounter, 1652 mSDsCounter, 0 mSdLazyCounter, 3385 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 1792 SdHoareTripleChecker+Invalid, 3535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 3385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:10,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 1792 Invalid, 3535 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [150 Valid, 3385 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2023-11-23 20:35:10,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2023-11-23 20:35:11,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 692. [2023-11-23 20:35:11,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 496 states have (on average 1.2560483870967742) internal successors, (623), 502 states have internal predecessors, (623), 116 states have call successors, (116), 79 states have call predecessors, (116), 78 states have return successors, (137), 112 states have call predecessors, (137), 115 states have call successors, (137) [2023-11-23 20:35:11,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 876 transitions. [2023-11-23 20:35:11,064 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 876 transitions. Word has length 55 [2023-11-23 20:35:11,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:11,065 INFO L495 AbstractCegarLoop]: Abstraction has 692 states and 876 transitions. [2023-11-23 20:35:11,065 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 20:35:11,065 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 876 transitions. [2023-11-23 20:35:11,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-23 20:35:11,067 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:11,067 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 20:35:11,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945277c1-b05d-48d3-8105-99c31d6503ba/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 20:35:11,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945277c1-b05d-48d3-8105-99c31d6503ba/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:35:11,288 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:11,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:11,289 INFO L85 PathProgramCache]: Analyzing trace with hash -2046508944, now seen corresponding path program 1 times [2023-11-23 20:35:11,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:11,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899869211] [2023-11-23 20:35:11,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:11,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:11,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:11,367 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 20:35:11,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:11,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899869211] [2023-11-23 20:35:11,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899869211] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:11,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:11,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:35:11,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872640143] [2023-11-23 20:35:11,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:11,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:35:11,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:11,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:35:11,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:35:11,371 INFO L87 Difference]: Start difference. First operand 692 states and 876 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 20:35:11,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:11,550 INFO L93 Difference]: Finished difference Result 973 states and 1198 transitions. [2023-11-23 20:35:11,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:35:11,551 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 20:35:11,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:11,556 INFO L225 Difference]: With dead ends: 973 [2023-11-23 20:35:11,557 INFO L226 Difference]: Without dead ends: 804 [2023-11-23 20:35:11,558 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 20:35:11,558 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 42 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:11,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 365 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:35:11,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2023-11-23 20:35:11,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 727. [2023-11-23 20:35:11,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 525 states have (on average 1.2552380952380953) internal successors, (659), 531 states have internal predecessors, (659), 119 states have call successors, (119), 82 states have call predecessors, (119), 81 states have return successors, (140), 115 states have call predecessors, (140), 118 states have call successors, (140) [2023-11-23 20:35:11,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 918 transitions. [2023-11-23 20:35:11,676 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 918 transitions. Word has length 61 [2023-11-23 20:35:11,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:11,676 INFO L495 AbstractCegarLoop]: Abstraction has 727 states and 918 transitions. [2023-11-23 20:35:11,676 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 20:35:11,676 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 918 transitions. [2023-11-23 20:35:11,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-23 20:35:11,678 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:11,678 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 20:35:11,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 20:35:11,679 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:11,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:11,679 INFO L85 PathProgramCache]: Analyzing trace with hash -187274692, now seen corresponding path program 1 times [2023-11-23 20:35:11,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:11,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321586790] [2023-11-23 20:35:11,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:11,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:11,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:11,846 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 20:35:11,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:11,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321586790] [2023-11-23 20:35:11,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321586790] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:11,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:11,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 20:35:11,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846335165] [2023-11-23 20:35:11,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:11,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 20:35:11,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:11,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 20:35:11,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-23 20:35:11,848 INFO L87 Difference]: Start difference. First operand 727 states and 918 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 20:35:12,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:12,413 INFO L93 Difference]: Finished difference Result 1190 states and 1444 transitions. [2023-11-23 20:35:12,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 20:35:12,414 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 20:35:12,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:12,420 INFO L225 Difference]: With dead ends: 1190 [2023-11-23 20:35:12,420 INFO L226 Difference]: Without dead ends: 887 [2023-11-23 20:35:12,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-23 20:35:12,422 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 291 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:12,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 485 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:35:12,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2023-11-23 20:35:12,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 866. [2023-11-23 20:35:12,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 619 states have (on average 1.2310177705977383) internal successors, (762), 625 states have internal predecessors, (762), 143 states have call successors, (143), 103 states have call predecessors, (143), 102 states have return successors, (164), 139 states have call predecessors, (164), 142 states have call successors, (164) [2023-11-23 20:35:12,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1069 transitions. [2023-11-23 20:35:12,562 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1069 transitions. Word has length 63 [2023-11-23 20:35:12,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:12,563 INFO L495 AbstractCegarLoop]: Abstraction has 866 states and 1069 transitions. [2023-11-23 20:35:12,563 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 20:35:12,563 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1069 transitions. [2023-11-23 20:35:12,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-23 20:35:12,565 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:12,565 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 20:35:12,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-23 20:35:12,566 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:12,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:12,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1844083599, now seen corresponding path program 1 times [2023-11-23 20:35:12,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:12,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211724280] [2023-11-23 20:35:12,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:12,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:12,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:12,700 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 20:35:12,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:12,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211724280] [2023-11-23 20:35:12,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211724280] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:35:12,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838139534] [2023-11-23 20:35:12,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:12,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:35:12,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945277c1-b05d-48d3-8105-99c31d6503ba/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:35:12,702 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945277c1-b05d-48d3-8105-99c31d6503ba/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:35:12,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945277c1-b05d-48d3-8105-99c31d6503ba/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 20:35:12,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:12,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 20:35:12,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:35:13,064 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 20:35:13,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:35:13,149 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 20:35:13,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838139534] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:35:13,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [339812418] [2023-11-23 20:35:13,156 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-11-23 20:35:13,156 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:35:13,157 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:35:13,157 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:35:13,157 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:35:18,375 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 111 for LOIs [2023-11-23 20:35:18,414 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 110 for LOIs [2023-11-23 20:35:18,570 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 78 for LOIs [2023-11-23 20:35:18,666 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 115 for LOIs [2023-11-23 20:35:19,109 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 111 for LOIs [2023-11-23 20:35:19,239 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 111 for LOIs [2023-11-23 20:35:19,328 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 111 for LOIs [2023-11-23 20:35:19,386 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 118 for LOIs [2023-11-23 20:35:19,448 INFO L180 IcfgInterpreter]: Interpretation finished