./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39439949-dee1-4631-bfb1-a2cb0978450f/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39439949-dee1-4631-bfb1-a2cb0978450f/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39439949-dee1-4631-bfb1-a2cb0978450f/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39439949-dee1-4631-bfb1-a2cb0978450f/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39439949-dee1-4631-bfb1-a2cb0978450f/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39439949-dee1-4631-bfb1-a2cb0978450f/bin/utaipan-verify-DbMuA5NWw2 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2299ca1c26d35c3e5f6d860495fd40e041317a8644bf02bee237b59c63427ec2 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:27:11,293 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:27:11,380 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39439949-dee1-4631-bfb1-a2cb0978450f/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:27:11,384 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:27:11,385 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:27:11,418 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:27:11,418 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:27:11,419 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:27:11,420 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:27:11,422 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:27:11,423 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:27:11,423 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:27:11,424 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:27:11,427 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:27:11,428 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:27:11,428 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:27:11,429 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:27:11,429 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:27:11,429 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:27:11,430 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:27:11,430 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:27:11,430 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:27:11,431 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:27:11,431 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:27:11,432 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:27:11,432 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:27:11,432 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:27:11,432 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:27:11,433 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:27:11,433 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:27:11,433 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:27:11,434 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:27:11,434 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:27:11,436 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:27:11,436 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:27:11,437 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:27:11,438 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:27:11,438 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:27:11,438 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:27:11,438 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:27:11,439 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:27:11,439 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:27:11,439 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:27:11,440 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:27:11,440 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:27:11,441 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:27:11,441 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:27:11,441 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_39439949-dee1-4631-bfb1-a2cb0978450f/bin/utaipan-verify-DbMuA5NWw2/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39439949-dee1-4631-bfb1-a2cb0978450f/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2299ca1c26d35c3e5f6d860495fd40e041317a8644bf02bee237b59c63427ec2 [2024-11-02 12:27:11,749 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:27:11,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:27:11,781 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:27:11,784 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:27:11,785 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:27:11,786 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39439949-dee1-4631-bfb1-a2cb0978450f/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c Unable to find full path for "g++" [2024-11-02 12:27:14,038 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:27:14,327 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:27:14,328 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39439949-dee1-4631-bfb1-a2cb0978450f/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c [2024-11-02 12:27:14,354 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39439949-dee1-4631-bfb1-a2cb0978450f/bin/utaipan-verify-DbMuA5NWw2/data/20518ee6d/260f44e761124814806353e61fb6240d/FLAG1fd5ac254 [2024-11-02 12:27:14,646 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39439949-dee1-4631-bfb1-a2cb0978450f/bin/utaipan-verify-DbMuA5NWw2/data/20518ee6d/260f44e761124814806353e61fb6240d [2024-11-02 12:27:14,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:27:14,650 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:27:14,652 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:27:14,652 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:27:14,660 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:27:14,661 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:27:14" (1/1) ... [2024-11-02 12:27:14,662 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5727506f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:14, skipping insertion in model container [2024-11-02 12:27:14,663 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:27:14" (1/1) ... [2024-11-02 12:27:14,742 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:27:15,006 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39439949-dee1-4631-bfb1-a2cb0978450f/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c[914,927] [2024-11-02 12:27:15,098 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39439949-dee1-4631-bfb1-a2cb0978450f/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c[7115,7128] [2024-11-02 12:27:15,219 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:27:15,239 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:27:15,288 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39439949-dee1-4631-bfb1-a2cb0978450f/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c[914,927] [2024-11-02 12:27:15,321 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39439949-dee1-4631-bfb1-a2cb0978450f/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c[7115,7128] [2024-11-02 12:27:15,384 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:27:15,416 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:27:15,416 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:15 WrapperNode [2024-11-02 12:27:15,417 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:27:15,418 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:27:15,418 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:27:15,418 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:27:15,428 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:15" (1/1) ... [2024-11-02 12:27:15,444 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:15" (1/1) ... [2024-11-02 12:27:15,514 INFO L138 Inliner]: procedures = 65, calls = 76, calls flagged for inlining = 33, calls inlined = 33, statements flattened = 714 [2024-11-02 12:27:15,514 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:27:15,515 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:27:15,516 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:27:15,516 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:27:15,526 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:15" (1/1) ... [2024-11-02 12:27:15,527 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:15" (1/1) ... [2024-11-02 12:27:15,532 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:15" (1/1) ... [2024-11-02 12:27:15,532 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:15" (1/1) ... [2024-11-02 12:27:15,547 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:15" (1/1) ... [2024-11-02 12:27:15,560 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:15" (1/1) ... [2024-11-02 12:27:15,567 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:15" (1/1) ... [2024-11-02 12:27:15,571 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:15" (1/1) ... [2024-11-02 12:27:15,586 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:27:15,587 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:27:15,591 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:27:15,591 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:27:15,592 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:15" (1/1) ... [2024-11-02 12:27:15,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:27:15,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39439949-dee1-4631-bfb1-a2cb0978450f/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:27:15,634 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39439949-dee1-4631-bfb1-a2cb0978450f/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:27:15,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39439949-dee1-4631-bfb1-a2cb0978450f/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:27:15,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:27:15,669 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-02 12:27:15,669 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-02 12:27:15,669 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2024-11-02 12:27:15,669 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2024-11-02 12:27:15,670 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2024-11-02 12:27:15,670 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2024-11-02 12:27:15,670 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2024-11-02 12:27:15,670 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2024-11-02 12:27:15,670 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2024-11-02 12:27:15,670 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2024-11-02 12:27:15,670 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2024-11-02 12:27:15,670 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2024-11-02 12:27:15,671 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2024-11-02 12:27:15,671 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2024-11-02 12:27:15,671 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2024-11-02 12:27:15,671 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2024-11-02 12:27:15,671 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2024-11-02 12:27:15,671 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2024-11-02 12:27:15,672 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2024-11-02 12:27:15,672 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2024-11-02 12:27:15,672 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2024-11-02 12:27:15,672 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2024-11-02 12:27:15,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:27:15,672 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2024-11-02 12:27:15,672 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2024-11-02 12:27:15,673 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2024-11-02 12:27:15,673 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2024-11-02 12:27:15,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:27:15,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:27:15,673 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2024-11-02 12:27:15,673 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2024-11-02 12:27:15,674 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2024-11-02 12:27:15,674 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2024-11-02 12:27:15,821 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:27:15,824 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:27:16,907 INFO L? ?]: Removed 95 outVars from TransFormulas that were not future-live. [2024-11-02 12:27:16,907 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:27:17,430 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:27:17,432 INFO L316 CfgBuilder]: Removed 13 assume(true) statements. [2024-11-02 12:27:17,433 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:27:17 BoogieIcfgContainer [2024-11-02 12:27:17,433 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:27:17,439 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:27:17,439 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:27:17,444 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:27:17,445 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:27:14" (1/3) ... [2024-11-02 12:27:17,446 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61a93565 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:27:17, skipping insertion in model container [2024-11-02 12:27:17,446 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:15" (2/3) ... [2024-11-02 12:27:17,448 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61a93565 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:27:17, skipping insertion in model container [2024-11-02 12:27:17,449 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:27:17" (3/3) ... [2024-11-02 12:27:17,450 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.06.cil-1.c [2024-11-02 12:27:17,480 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:27:17,481 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-02 12:27:17,601 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:27:17,612 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3a159f19, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:27:17,612 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-02 12:27:17,619 INFO L276 IsEmpty]: Start isEmpty. Operand has 207 states, 153 states have (on average 1.5032679738562091) internal successors, (230), 161 states have internal predecessors, (230), 36 states have call successors, (36), 15 states have call predecessors, (36), 15 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) [2024-11-02 12:27:17,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-02 12:27:17,637 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:27:17,638 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:27:17,639 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:27:17,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:27:17,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1121798692, now seen corresponding path program 1 times [2024-11-02 12:27:17,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:27:17,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026507349] [2024-11-02 12:27:17,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:17,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:27:17,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:18,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:27:18,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:27:18,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026507349] [2024-11-02 12:27:18,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026507349] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:27:18,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:27:18,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-02 12:27:18,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604015753] [2024-11-02 12:27:18,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:27:18,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 12:27:18,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:27:18,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 12:27:18,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:27:18,367 INFO L87 Difference]: Start difference. First operand has 207 states, 153 states have (on average 1.5032679738562091) internal successors, (230), 161 states have internal predecessors, (230), 36 states have call successors, (36), 15 states have call predecessors, (36), 15 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-02 12:27:19,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:27:19,786 INFO L93 Difference]: Finished difference Result 833 states and 1202 transitions. [2024-11-02 12:27:19,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-02 12:27:19,789 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2024-11-02 12:27:19,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:27:19,821 INFO L225 Difference]: With dead ends: 833 [2024-11-02 12:27:19,821 INFO L226 Difference]: Without dead ends: 612 [2024-11-02 12:27:19,830 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-02 12:27:19,836 INFO L432 NwaCegarLoop]: 359 mSDtfsCounter, 903 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 910 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:27:19,837 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [910 Valid, 934 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-02 12:27:19,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2024-11-02 12:27:19,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 541. [2024-11-02 12:27:19,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 387 states have (on average 1.330749354005168) internal successors, (515), 392 states have internal predecessors, (515), 91 states have call successors, (91), 63 states have call predecessors, (91), 61 states have return successors, (102), 87 states have call predecessors, (102), 87 states have call successors, (102) [2024-11-02 12:27:20,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 708 transitions. [2024-11-02 12:27:20,004 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 708 transitions. Word has length 45 [2024-11-02 12:27:20,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:27:20,007 INFO L471 AbstractCegarLoop]: Abstraction has 541 states and 708 transitions. [2024-11-02 12:27:20,008 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-02 12:27:20,008 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 708 transitions. [2024-11-02 12:27:20,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-02 12:27:20,012 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:27:20,013 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:27:20,013 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:27:20,014 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:27:20,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:27:20,015 INFO L85 PathProgramCache]: Analyzing trace with hash -232898874, now seen corresponding path program 1 times [2024-11-02 12:27:20,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:27:20,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730329014] [2024-11-02 12:27:20,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:20,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:27:20,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:20,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:27:20,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:27:20,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730329014] [2024-11-02 12:27:20,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730329014] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:27:20,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:27:20,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-02 12:27:20,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079294660] [2024-11-02 12:27:20,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:27:20,461 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-02 12:27:20,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:27:20,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-02 12:27:20,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-02 12:27:20,463 INFO L87 Difference]: Start difference. First operand 541 states and 708 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-02 12:27:21,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:27:21,533 INFO L93 Difference]: Finished difference Result 1302 states and 1655 transitions. [2024-11-02 12:27:21,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-02 12:27:21,534 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2024-11-02 12:27:21,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:27:21,545 INFO L225 Difference]: With dead ends: 1302 [2024-11-02 12:27:21,545 INFO L226 Difference]: Without dead ends: 899 [2024-11-02 12:27:21,550 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2024-11-02 12:27:21,551 INFO L432 NwaCegarLoop]: 166 mSDtfsCounter, 417 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-02 12:27:21,552 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [443 Valid, 753 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-02 12:27:21,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2024-11-02 12:27:21,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 870. [2024-11-02 12:27:21,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 610 states have (on average 1.2885245901639344) internal successors, (786), 616 states have internal predecessors, (786), 147 states have call successors, (147), 111 states have call predecessors, (147), 111 states have return successors, (176), 144 states have call predecessors, (176), 143 states have call successors, (176) [2024-11-02 12:27:21,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1109 transitions. [2024-11-02 12:27:21,685 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1109 transitions. Word has length 46 [2024-11-02 12:27:21,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:27:21,686 INFO L471 AbstractCegarLoop]: Abstraction has 870 states and 1109 transitions. [2024-11-02 12:27:21,688 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-02 12:27:21,688 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1109 transitions. [2024-11-02 12:27:21,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-02 12:27:21,693 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:27:21,693 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:27:21,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 12:27:21,693 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:27:21,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:27:21,694 INFO L85 PathProgramCache]: Analyzing trace with hash 2053007370, now seen corresponding path program 1 times [2024-11-02 12:27:21,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:27:21,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712473790] [2024-11-02 12:27:21,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:21,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:27:21,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:21,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:27:21,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:27:21,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712473790] [2024-11-02 12:27:21,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712473790] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:27:21,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:27:21,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:27:21,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121855167] [2024-11-02 12:27:21,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:27:21,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:27:21,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:27:21,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:27:21,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:27:21,838 INFO L87 Difference]: Start difference. First operand 870 states and 1109 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-02 12:27:22,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:27:22,161 INFO L93 Difference]: Finished difference Result 1811 states and 2268 transitions. [2024-11-02 12:27:22,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:27:22,162 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2024-11-02 12:27:22,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:27:22,170 INFO L225 Difference]: With dead ends: 1811 [2024-11-02 12:27:22,171 INFO L226 Difference]: Without dead ends: 1129 [2024-11-02 12:27:22,173 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:27:22,174 INFO L432 NwaCegarLoop]: 246 mSDtfsCounter, 68 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:27:22,175 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 464 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:27:22,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2024-11-02 12:27:22,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 1107. [2024-11-02 12:27:22,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 771 states have (on average 1.2710765239948119) internal successors, (980), 777 states have internal predecessors, (980), 189 states have call successors, (189), 149 states have call predecessors, (189), 145 states have return successors, (222), 182 states have call predecessors, (222), 185 states have call successors, (222) [2024-11-02 12:27:22,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 1391 transitions. [2024-11-02 12:27:22,332 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 1391 transitions. Word has length 47 [2024-11-02 12:27:22,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:27:22,332 INFO L471 AbstractCegarLoop]: Abstraction has 1107 states and 1391 transitions. [2024-11-02 12:27:22,333 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-02 12:27:22,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 1391 transitions. [2024-11-02 12:27:22,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-02 12:27:22,335 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:27:22,336 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:27:22,336 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 12:27:22,336 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:27:22,337 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:27:22,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1957339654, now seen corresponding path program 1 times [2024-11-02 12:27:22,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:27:22,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211286743] [2024-11-02 12:27:22,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:22,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:27:22,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:22,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:27:22,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:27:22,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211286743] [2024-11-02 12:27:22,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211286743] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:27:22,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:27:22,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-02 12:27:22,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299645400] [2024-11-02 12:27:22,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:27:22,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:27:22,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:27:22,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:27:22,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:27:22,514 INFO L87 Difference]: Start difference. First operand 1107 states and 1391 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-02 12:27:23,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:27:23,713 INFO L93 Difference]: Finished difference Result 1700 states and 2319 transitions. [2024-11-02 12:27:23,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 12:27:23,714 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2024-11-02 12:27:23,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:27:23,726 INFO L225 Difference]: With dead ends: 1700 [2024-11-02 12:27:23,726 INFO L226 Difference]: Without dead ends: 1573 [2024-11-02 12:27:23,728 INFO L431 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 [2024-11-02 12:27:23,730 INFO L432 NwaCegarLoop]: 370 mSDtfsCounter, 934 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 934 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-02 12:27:23,734 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [934 Valid, 925 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-02 12:27:23,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1573 states. [2024-11-02 12:27:23,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1573 to 1560. [2024-11-02 12:27:23,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1560 states, 1139 states have (on average 1.327480245829675) internal successors, (1512), 1148 states have internal predecessors, (1512), 250 states have call successors, (250), 173 states have call predecessors, (250), 169 states have return successors, (321), 240 states have call predecessors, (321), 246 states have call successors, (321) [2024-11-02 12:27:23,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1560 states to 1560 states and 2083 transitions. [2024-11-02 12:27:23,976 INFO L78 Accepts]: Start accepts. Automaton has 1560 states and 2083 transitions. Word has length 50 [2024-11-02 12:27:23,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:27:23,978 INFO L471 AbstractCegarLoop]: Abstraction has 1560 states and 2083 transitions. [2024-11-02 12:27:23,979 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-02 12:27:23,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1560 states and 2083 transitions. [2024-11-02 12:27:23,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-02 12:27:23,981 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:27:23,983 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:27:23,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 12:27:23,984 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:27:23,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:27:23,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1949144441, now seen corresponding path program 1 times [2024-11-02 12:27:23,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:27:23,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521623363] [2024-11-02 12:27:23,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:23,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:27:24,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:24,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:27:24,059 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:27:24,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521623363] [2024-11-02 12:27:24,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521623363] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:27:24,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:27:24,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:27:24,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696433822] [2024-11-02 12:27:24,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:27:24,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:27:24,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:27:24,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:27:24,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:27:24,065 INFO L87 Difference]: Start difference. First operand 1560 states and 2083 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-02 12:27:24,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:27:24,377 INFO L93 Difference]: Finished difference Result 1966 states and 2573 transitions. [2024-11-02 12:27:24,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:27:24,378 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2024-11-02 12:27:24,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:27:24,389 INFO L225 Difference]: With dead ends: 1966 [2024-11-02 12:27:24,389 INFO L226 Difference]: Without dead ends: 1411 [2024-11-02 12:27:24,391 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:27:24,393 INFO L432 NwaCegarLoop]: 247 mSDtfsCounter, 254 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:27:24,393 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 309 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:27:24,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1411 states. [2024-11-02 12:27:24,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1411 to 1205. [2024-11-02 12:27:24,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 903 states have (on average 1.3388704318936877) internal successors, (1209), 911 states have internal predecessors, (1209), 187 states have call successors, (187), 119 states have call predecessors, (187), 113 states have return successors, (229), 176 states have call predecessors, (229), 183 states have call successors, (229) [2024-11-02 12:27:24,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 1625 transitions. [2024-11-02 12:27:24,522 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 1625 transitions. Word has length 53 [2024-11-02 12:27:24,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:27:24,523 INFO L471 AbstractCegarLoop]: Abstraction has 1205 states and 1625 transitions. [2024-11-02 12:27:24,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-02 12:27:24,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 1625 transitions. [2024-11-02 12:27:24,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-02 12:27:24,524 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:27:24,524 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:27:24,525 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-02 12:27:24,525 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:27:24,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:27:24,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1581639964, now seen corresponding path program 1 times [2024-11-02 12:27:24,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:27:24,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995832359] [2024-11-02 12:27:24,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:24,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:27:24,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:24,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:27:24,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:27:24,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995832359] [2024-11-02 12:27:24,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995832359] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:27:24,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:27:24,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:27:24,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311743451] [2024-11-02 12:27:24,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:27:24,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:27:24,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:27:24,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:27:24,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:27:24,624 INFO L87 Difference]: Start difference. First operand 1205 states and 1625 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2024-11-02 12:27:25,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:27:25,080 INFO L93 Difference]: Finished difference Result 1460 states and 1926 transitions. [2024-11-02 12:27:25,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:27:25,081 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2024-11-02 12:27:25,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:27:25,089 INFO L225 Difference]: With dead ends: 1460 [2024-11-02 12:27:25,089 INFO L226 Difference]: Without dead ends: 1457 [2024-11-02 12:27:25,092 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:27:25,094 INFO L432 NwaCegarLoop]: 242 mSDtfsCounter, 467 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 12:27:25,094 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [467 Valid, 285 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 12:27:25,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1457 states. [2024-11-02 12:27:25,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1457 to 1204. [2024-11-02 12:27:25,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1204 states, 903 states have (on average 1.3322259136212624) internal successors, (1203), 910 states have internal predecessors, (1203), 186 states have call successors, (186), 119 states have call predecessors, (186), 113 states have return successors, (229), 176 states have call predecessors, (229), 183 states have call successors, (229) [2024-11-02 12:27:25,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 1618 transitions. [2024-11-02 12:27:25,240 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 1618 transitions. Word has length 54 [2024-11-02 12:27:25,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:27:25,241 INFO L471 AbstractCegarLoop]: Abstraction has 1204 states and 1618 transitions. [2024-11-02 12:27:25,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2024-11-02 12:27:25,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 1618 transitions. [2024-11-02 12:27:25,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-02 12:27:25,242 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:27:25,242 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:27:25,242 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-02 12:27:25,243 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:27:25,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:27:25,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1787226637, now seen corresponding path program 1 times [2024-11-02 12:27:25,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:27:25,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733504948] [2024-11-02 12:27:25,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:25,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:27:25,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:25,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:27:25,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:27:25,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733504948] [2024-11-02 12:27:25,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733504948] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:27:25,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081840409] [2024-11-02 12:27:25,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:25,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:27:25,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39439949-dee1-4631-bfb1-a2cb0978450f/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:27:25,382 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39439949-dee1-4631-bfb1-a2cb0978450f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:27:25,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39439949-dee1-4631-bfb1-a2cb0978450f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:27:25,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:25,515 INFO L255 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-02 12:27:25,524 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:27:25,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:27:25,843 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:27:25,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:27:25,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081840409] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:27:25,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1547098873] [2024-11-02 12:27:25,994 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2024-11-02 12:27:25,994 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:27:25,998 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:27:26,004 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:27:26,005 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:27:31,564 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 151 for LOIs [2024-11-02 12:27:31,658 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 147 for LOIs [2024-11-02 12:27:31,758 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 155 for LOIs [2024-11-02 12:27:32,921 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 151 for LOIs [2024-11-02 12:27:33,106 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 151 for LOIs [2024-11-02 12:27:33,275 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 151 for LOIs [2024-11-02 12:27:33,331 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 158 for LOIs [2024-11-02 12:27:33,384 INFO L180 IcfgInterpreter]: Interpretation finished