./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 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_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje --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 284334fdd31c4c26d16d0bf558a458f462d11a8d54419841fe6fc9cdbb9a1cfc --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 04:29:30,511 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 04:29:30,608 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 04:29:30,615 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 04:29:30,616 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 04:29:30,647 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 04:29:30,650 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 04:29:30,650 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 04:29:30,651 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 04:29:30,652 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 04:29:30,653 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 04:29:30,654 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 04:29:30,655 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 04:29:30,655 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 04:29:30,657 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 04:29:30,658 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 04:29:30,658 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 04:29:30,658 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 04:29:30,659 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 04:29:30,659 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 04:29:30,659 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 04:29:30,664 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 04:29:30,664 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 04:29:30,665 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 04:29:30,665 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 04:29:30,665 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 04:29:30,666 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 04:29:30,666 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 04:29:30,666 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 04:29:30,667 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 04:29:30,667 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 04:29:30,669 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 04:29:30,669 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 04:29:30,669 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 04:29:30,670 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 04:29:30,670 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 04:29:30,671 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 04:29:30,671 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 04:29:30,671 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:29:30,672 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 04:29:30,672 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 04:29:30,672 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 04:29:30,673 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 04:29:30,673 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 04:29:30,674 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 04:29:30,674 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 04:29:30,674 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 04:29:30,675 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_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 284334fdd31c4c26d16d0bf558a458f462d11a8d54419841fe6fc9cdbb9a1cfc [2024-11-09 04:29:30,931 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 04:29:30,958 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 04:29:30,963 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 04:29:30,964 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 04:29:30,966 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 04:29:30,967 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c Unable to find full path for "g++" [2024-11-09 04:29:32,977 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 04:29:33,258 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 04:29:33,259 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c [2024-11-09 04:29:33,283 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/data/1ea925416/58cb45aa3f204ae493aba98e1a620ec4/FLAGb029daebd [2024-11-09 04:29:33,564 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/data/1ea925416/58cb45aa3f204ae493aba98e1a620ec4 [2024-11-09 04:29:33,567 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 04:29:33,569 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 04:29:33,573 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 04:29:33,574 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 04:29:33,580 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 04:29:33,581 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:29:33" (1/1) ... [2024-11-09 04:29:33,582 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24b21b03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:33, skipping insertion in model container [2024-11-09 04:29:33,582 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:29:33" (1/1) ... [2024-11-09 04:29:33,641 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 04:29:33,894 WARN L250 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_d25978a8-ac88-470d-aa51-8239e8e4a1c9/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c[914,927] [2024-11-09 04:29:34,038 WARN L250 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_d25978a8-ac88-470d-aa51-8239e8e4a1c9/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c[7115,7128] [2024-11-09 04:29:34,152 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:29:34,169 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 04:29:34,186 WARN L250 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_d25978a8-ac88-470d-aa51-8239e8e4a1c9/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c[914,927] [2024-11-09 04:29:34,243 WARN L250 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_d25978a8-ac88-470d-aa51-8239e8e4a1c9/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c[7115,7128] [2024-11-09 04:29:34,299 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:29:34,331 INFO L204 MainTranslator]: Completed translation [2024-11-09 04:29:34,331 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:34 WrapperNode [2024-11-09 04:29:34,331 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 04:29:34,333 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 04:29:34,333 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 04:29:34,333 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 04:29:34,342 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:34" (1/1) ... [2024-11-09 04:29:34,364 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:34" (1/1) ... [2024-11-09 04:29:34,428 INFO L138 Inliner]: procedures = 61, calls = 69, calls flagged for inlining = 30, calls inlined = 30, statements flattened = 577 [2024-11-09 04:29:34,428 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 04:29:34,434 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 04:29:34,434 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 04:29:34,434 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 04:29:34,467 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:34" (1/1) ... [2024-11-09 04:29:34,468 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:34" (1/1) ... [2024-11-09 04:29:34,471 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:34" (1/1) ... [2024-11-09 04:29:34,472 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:34" (1/1) ... [2024-11-09 04:29:34,482 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:34" (1/1) ... [2024-11-09 04:29:34,496 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:34" (1/1) ... [2024-11-09 04:29:34,498 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:34" (1/1) ... [2024-11-09 04:29:34,501 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:34" (1/1) ... [2024-11-09 04:29:34,505 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 04:29:34,506 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 04:29:34,507 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 04:29:34,507 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 04:29:34,508 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:34" (1/1) ... [2024-11-09 04:29:34,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:29:34,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:34,544 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 04:29:34,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 04:29:34,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 04:29:34,581 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-09 04:29:34,581 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-09 04:29:34,581 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2024-11-09 04:29:34,582 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2024-11-09 04:29:34,582 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2024-11-09 04:29:34,582 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2024-11-09 04:29:34,582 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2024-11-09 04:29:34,582 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2024-11-09 04:29:34,582 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2024-11-09 04:29:34,583 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2024-11-09 04:29:34,583 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2024-11-09 04:29:34,583 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2024-11-09 04:29:34,583 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2024-11-09 04:29:34,583 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2024-11-09 04:29:34,584 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2024-11-09 04:29:34,584 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2024-11-09 04:29:34,584 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2024-11-09 04:29:34,585 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2024-11-09 04:29:34,585 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2024-11-09 04:29:34,586 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2024-11-09 04:29:34,586 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2024-11-09 04:29:34,586 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2024-11-09 04:29:34,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 04:29:34,586 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2024-11-09 04:29:34,587 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2024-11-09 04:29:34,587 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2024-11-09 04:29:34,588 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2024-11-09 04:29:34,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 04:29:34,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 04:29:34,588 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2024-11-09 04:29:34,589 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2024-11-09 04:29:34,751 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 04:29:34,755 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 04:29:35,792 INFO L? ?]: Removed 79 outVars from TransFormulas that were not future-live. [2024-11-09 04:29:35,792 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 04:29:36,175 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 04:29:36,175 INFO L316 CfgBuilder]: Removed 11 assume(true) statements. [2024-11-09 04:29:36,177 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:29:36 BoogieIcfgContainer [2024-11-09 04:29:36,177 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 04:29:36,180 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 04:29:36,180 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 04:29:36,183 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 04:29:36,184 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 04:29:33" (1/3) ... [2024-11-09 04:29:36,185 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c56e22d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:29:36, skipping insertion in model container [2024-11-09 04:29:36,185 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:34" (2/3) ... [2024-11-09 04:29:36,185 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c56e22d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:29:36, skipping insertion in model container [2024-11-09 04:29:36,185 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:29:36" (3/3) ... [2024-11-09 04:29:36,187 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.04.cil-1.c [2024-11-09 04:29:36,202 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 04:29:36,203 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-09 04:29:36,272 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 04:29:36,279 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;@41ee503e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 04:29:36,279 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-09 04:29:36,285 INFO L276 IsEmpty]: Start isEmpty. Operand has 177 states, 128 states have (on average 1.484375) internal successors, (190), 134 states have internal predecessors, (190), 32 states have call successors, (32), 14 states have call predecessors, (32), 14 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-09 04:29:36,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-09 04:29:36,299 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:36,300 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] [2024-11-09 04:29:36,301 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:36,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:36,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1970891793, now seen corresponding path program 1 times [2024-11-09 04:29:36,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:36,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773691235] [2024-11-09 04:29:36,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:36,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:36,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:37,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:29:37,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:37,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773691235] [2024-11-09 04:29:37,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773691235] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:29:37,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:29:37,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-09 04:29:37,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794123643] [2024-11-09 04:29:37,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:29:37,019 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 04:29:37,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:37,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 04:29:37,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-09 04:29:37,056 INFO L87 Difference]: Start difference. First operand has 177 states, 128 states have (on average 1.484375) internal successors, (190), 134 states have internal predecessors, (190), 32 states have call successors, (32), 14 states have call predecessors, (32), 14 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-09 04:29:38,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:38,043 INFO L93 Difference]: Finished difference Result 411 states and 576 transitions. [2024-11-09 04:29:38,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 04:29:38,047 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2024-11-09 04:29:38,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:38,057 INFO L225 Difference]: With dead ends: 411 [2024-11-09 04:29:38,057 INFO L226 Difference]: Without dead ends: 237 [2024-11-09 04:29:38,061 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2024-11-09 04:29:38,064 INFO L432 NwaCegarLoop]: 143 mSDtfsCounter, 385 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:38,065 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 740 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 04:29:38,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2024-11-09 04:29:38,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 224. [2024-11-09 04:29:38,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 162 states have (on average 1.3888888888888888) internal successors, (225), 166 states have internal predecessors, (225), 40 states have call successors, (40), 21 states have call predecessors, (40), 20 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2024-11-09 04:29:38,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 303 transitions. [2024-11-09 04:29:38,154 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 303 transitions. Word has length 45 [2024-11-09 04:29:38,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:38,155 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 303 transitions. [2024-11-09 04:29:38,155 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-09 04:29:38,155 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 303 transitions. [2024-11-09 04:29:38,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-09 04:29:38,162 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:38,162 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] [2024-11-09 04:29:38,163 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 04:29:38,163 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:38,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:38,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1225716401, now seen corresponding path program 1 times [2024-11-09 04:29:38,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:38,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958463420] [2024-11-09 04:29:38,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:38,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:38,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:38,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:29:38,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:38,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958463420] [2024-11-09 04:29:38,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958463420] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:29:38,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:29:38,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 04:29:38,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943099246] [2024-11-09 04:29:38,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:29:38,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 04:29:38,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:38,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 04:29:38,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:29:38,340 INFO L87 Difference]: Start difference. First operand 224 states and 303 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2024-11-09 04:29:39,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:39,141 INFO L93 Difference]: Finished difference Result 687 states and 1011 transitions. [2024-11-09 04:29:39,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:29:39,141 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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 43 [2024-11-09 04:29:39,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:39,147 INFO L225 Difference]: With dead ends: 687 [2024-11-09 04:29:39,147 INFO L226 Difference]: Without dead ends: 589 [2024-11-09 04:29:39,149 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 [2024-11-09 04:29:39,151 INFO L432 NwaCegarLoop]: 294 mSDtfsCounter, 729 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:39,151 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [730 Valid, 700 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 04:29:39,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2024-11-09 04:29:39,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 578. [2024-11-09 04:29:39,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 439 states have (on average 1.4009111617312073) internal successors, (615), 446 states have internal predecessors, (615), 93 states have call successors, (93), 45 states have call predecessors, (93), 44 states have return successors, (121), 88 states have call predecessors, (121), 91 states have call successors, (121) [2024-11-09 04:29:39,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 829 transitions. [2024-11-09 04:29:39,265 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 829 transitions. Word has length 43 [2024-11-09 04:29:39,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:39,266 INFO L471 AbstractCegarLoop]: Abstraction has 578 states and 829 transitions. [2024-11-09 04:29:39,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2024-11-09 04:29:39,266 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 829 transitions. [2024-11-09 04:29:39,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-09 04:29:39,268 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:39,268 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] [2024-11-09 04:29:39,270 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 04:29:39,271 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:39,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:39,273 INFO L85 PathProgramCache]: Analyzing trace with hash -753569729, now seen corresponding path program 1 times [2024-11-09 04:29:39,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:39,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208496270] [2024-11-09 04:29:39,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:39,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:39,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:39,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:29:39,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:39,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208496270] [2024-11-09 04:29:39,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208496270] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:29:39,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:29:39,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:29:39,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728685341] [2024-11-09 04:29:39,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:29:39,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:29:39,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:39,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:29:39,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:29:39,366 INFO L87 Difference]: Start difference. First operand 578 states and 829 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 04:29:39,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:39,563 INFO L93 Difference]: Finished difference Result 803 states and 1116 transitions. [2024-11-09 04:29:39,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:29:39,563 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2024-11-09 04:29:39,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:39,569 INFO L225 Difference]: With dead ends: 803 [2024-11-09 04:29:39,570 INFO L226 Difference]: Without dead ends: 687 [2024-11-09 04:29:39,571 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 [2024-11-09 04:29:39,572 INFO L432 NwaCegarLoop]: 199 mSDtfsCounter, 214 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:39,573 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 262 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:29:39,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2024-11-09 04:29:39,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 673. [2024-11-09 04:29:39,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 504 states have (on average 1.378968253968254) internal successors, (695), 511 states have internal predecessors, (695), 109 states have call successors, (109), 59 states have call predecessors, (109), 58 states have return successors, (137), 104 states have call predecessors, (137), 107 states have call successors, (137) [2024-11-09 04:29:39,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 941 transitions. [2024-11-09 04:29:39,697 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 941 transitions. Word has length 46 [2024-11-09 04:29:39,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:39,698 INFO L471 AbstractCegarLoop]: Abstraction has 673 states and 941 transitions. [2024-11-09 04:29:39,699 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 04:29:39,699 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 941 transitions. [2024-11-09 04:29:39,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-09 04:29:39,705 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:39,705 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] [2024-11-09 04:29:39,705 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 04:29:39,705 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:39,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:39,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1656596063, now seen corresponding path program 1 times [2024-11-09 04:29:39,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:39,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328448302] [2024-11-09 04:29:39,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:39,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:39,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:39,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:29:39,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:39,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328448302] [2024-11-09 04:29:39,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328448302] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:29:39,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:29:39,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:29:39,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732676686] [2024-11-09 04:29:39,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:29:39,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:29:39,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:39,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:29:39,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:29:39,828 INFO L87 Difference]: Start difference. First operand 673 states and 941 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) [2024-11-09 04:29:40,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:40,062 INFO L93 Difference]: Finished difference Result 1037 states and 1389 transitions. [2024-11-09 04:29:40,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:29:40,063 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 [2024-11-09 04:29:40,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:40,070 INFO L225 Difference]: With dead ends: 1037 [2024-11-09 04:29:40,070 INFO L226 Difference]: Without dead ends: 827 [2024-11-09 04:29:40,072 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 [2024-11-09 04:29:40,073 INFO L432 NwaCegarLoop]: 201 mSDtfsCounter, 68 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:40,074 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 380 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:29:40,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2024-11-09 04:29:40,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 823. [2024-11-09 04:29:40,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 609 states have (on average 1.3628899835796386) internal successors, (830), 616 states have internal predecessors, (830), 133 states have call successors, (133), 80 states have call predecessors, (133), 79 states have return successors, (161), 128 states have call predecessors, (161), 131 states have call successors, (161) [2024-11-09 04:29:40,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 1124 transitions. [2024-11-09 04:29:40,174 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 1124 transitions. Word has length 47 [2024-11-09 04:29:40,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:40,176 INFO L471 AbstractCegarLoop]: Abstraction has 823 states and 1124 transitions. [2024-11-09 04:29:40,176 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) [2024-11-09 04:29:40,176 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 1124 transitions. [2024-11-09 04:29:40,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-09 04:29:40,180 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:40,180 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, 1, 1, 1] [2024-11-09 04:29:40,180 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 04:29:40,181 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:40,181 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:40,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1626064063, now seen corresponding path program 1 times [2024-11-09 04:29:40,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:40,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322076092] [2024-11-09 04:29:40,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:40,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:40,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:40,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:29:40,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:40,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322076092] [2024-11-09 04:29:40,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322076092] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:29:40,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:29:40,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:29:40,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967385606] [2024-11-09 04:29:40,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:29:40,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:29:40,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:40,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:29:40,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:29:40,284 INFO L87 Difference]: Start difference. First operand 823 states and 1124 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (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) [2024-11-09 04:29:40,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:40,536 INFO L93 Difference]: Finished difference Result 1247 states and 1646 transitions. [2024-11-09 04:29:40,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:29:40,537 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (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 [2024-11-09 04:29:40,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:40,546 INFO L225 Difference]: With dead ends: 1247 [2024-11-09 04:29:40,546 INFO L226 Difference]: Without dead ends: 886 [2024-11-09 04:29:40,548 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 [2024-11-09 04:29:40,552 INFO L432 NwaCegarLoop]: 207 mSDtfsCounter, 214 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:40,553 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 269 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:29:40,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2024-11-09 04:29:40,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 874. [2024-11-09 04:29:40,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 645 states have (on average 1.3519379844961241) internal successors, (872), 652 states have internal predecessors, (872), 141 states have call successors, (141), 87 states have call predecessors, (141), 86 states have return successors, (169), 136 states have call predecessors, (169), 139 states have call successors, (169) [2024-11-09 04:29:40,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1182 transitions. [2024-11-09 04:29:40,691 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1182 transitions. Word has length 53 [2024-11-09 04:29:40,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:40,693 INFO L471 AbstractCegarLoop]: Abstraction has 874 states and 1182 transitions. [2024-11-09 04:29:40,694 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (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) [2024-11-09 04:29:40,696 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1182 transitions. [2024-11-09 04:29:40,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-09 04:29:40,698 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:40,698 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] [2024-11-09 04:29:40,698 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 04:29:40,698 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:40,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:40,699 INFO L85 PathProgramCache]: Analyzing trace with hash 2026956686, now seen corresponding path program 1 times [2024-11-09 04:29:40,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:40,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422887096] [2024-11-09 04:29:40,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:40,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:40,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:40,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:29:40,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:40,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422887096] [2024-11-09 04:29:40,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422887096] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:29:40,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:29:40,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 04:29:40,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064867818] [2024-11-09 04:29:40,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:29:40,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:29:40,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:40,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:29:40,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:29:40,818 INFO L87 Difference]: Start difference. First operand 874 states and 1182 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) [2024-11-09 04:29:41,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:41,208 INFO L93 Difference]: Finished difference Result 983 states and 1314 transitions. [2024-11-09 04:29:41,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:29:41,209 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 [2024-11-09 04:29:41,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:41,216 INFO L225 Difference]: With dead ends: 983 [2024-11-09 04:29:41,217 INFO L226 Difference]: Without dead ends: 980 [2024-11-09 04:29:41,218 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 [2024-11-09 04:29:41,221 INFO L432 NwaCegarLoop]: 204 mSDtfsCounter, 390 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:41,222 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 248 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 04:29:41,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2024-11-09 04:29:41,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 873. [2024-11-09 04:29:41,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 645 states have (on average 1.3472868217054264) internal successors, (869), 651 states have internal predecessors, (869), 140 states have call successors, (140), 87 states have call predecessors, (140), 86 states have return successors, (169), 136 states have call predecessors, (169), 139 states have call successors, (169) [2024-11-09 04:29:41,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1178 transitions. [2024-11-09 04:29:41,345 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1178 transitions. Word has length 54 [2024-11-09 04:29:41,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:41,345 INFO L471 AbstractCegarLoop]: Abstraction has 873 states and 1178 transitions. [2024-11-09 04:29:41,346 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) [2024-11-09 04:29:41,346 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1178 transitions. [2024-11-09 04:29:41,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-09 04:29:41,349 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:41,349 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] [2024-11-09 04:29:41,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 04:29:41,350 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:41,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:41,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1589697047, now seen corresponding path program 1 times [2024-11-09 04:29:41,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:41,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726523273] [2024-11-09 04:29:41,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:41,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:41,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:41,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:29:41,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:41,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726523273] [2024-11-09 04:29:41,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726523273] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:29:41,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479781508] [2024-11-09 04:29:41,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:41,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:41,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:41,528 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:29:41,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 04:29:41,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:41,647 INFO L255 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 04:29:41,654 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:29:42,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:29:42,009 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:29:42,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:29:42,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479781508] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:29:42,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [138648775] [2024-11-09 04:29:42,157 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2024-11-09 04:29:42,157 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:29:42,161 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:29:42,167 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:29:42,167 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:29:46,810 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 131 for LOIs [2024-11-09 04:29:46,872 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 127 for LOIs [2024-11-09 04:29:46,938 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 135 for LOIs [2024-11-09 04:29:47,884 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 131 for LOIs [2024-11-09 04:29:48,058 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 131 for LOIs [2024-11-09 04:29:48,214 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 131 for LOIs [2024-11-09 04:29:48,255 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 138 for LOIs [2024-11-09 04:29:48,308 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:29:59,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [138648775] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:29:59,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:29:59,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [5, 5, 4] total 36 [2024-11-09 04:29:59,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596783075] [2024-11-09 04:29:59,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:29:59,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-09 04:29:59,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:59,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-09 04:29:59,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 04:29:59,984 INFO L87 Difference]: Start difference. First operand 873 states and 1178 transitions. Second operand has 31 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 7 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-09 04:30:09,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:09,528 INFO L93 Difference]: Finished difference Result 1310 states and 1707 transitions. [2024-11-09 04:30:09,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-09 04:30:09,531 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 7 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 55 [2024-11-09 04:30:09,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:09,536 INFO L225 Difference]: With dead ends: 1310 [2024-11-09 04:30:09,536 INFO L226 Difference]: Without dead ends: 900 [2024-11-09 04:30:09,538 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 131 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=405, Invalid=1947, Unknown=0, NotChecked=0, Total=2352 [2024-11-09 04:30:09,539 INFO L432 NwaCegarLoop]: 184 mSDtfsCounter, 148 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 1828 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 1968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:09,540 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 982 Invalid, 1968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1828 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2024-11-09 04:30:09,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2024-11-09 04:30:09,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 892. [2024-11-09 04:30:09,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 662 states have (on average 1.3429003021148036) internal successors, (889), 668 states have internal predecessors, (889), 141 states have call successors, (141), 88 states have call predecessors, (141), 87 states have return successors, (170), 137 states have call predecessors, (170), 140 states have call successors, (170) [2024-11-09 04:30:09,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 1200 transitions. [2024-11-09 04:30:09,667 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 1200 transitions. Word has length 55 [2024-11-09 04:30:09,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:09,668 INFO L471 AbstractCegarLoop]: Abstraction has 892 states and 1200 transitions. [2024-11-09 04:30:09,668 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 7 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-09 04:30:09,669 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 1200 transitions. [2024-11-09 04:30:09,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-09 04:30:09,670 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:09,671 INFO L215 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] [2024-11-09 04:30:09,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 04:30:09,871 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-09 04:30:09,872 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:30:09,872 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:09,873 INFO L85 PathProgramCache]: Analyzing trace with hash -617487389, now seen corresponding path program 1 times [2024-11-09 04:30:09,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:09,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946045791] [2024-11-09 04:30:09,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:09,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:09,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:09,974 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 04:30:09,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:09,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946045791] [2024-11-09 04:30:09,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946045791] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:09,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:30:09,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:30:09,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614070890] [2024-11-09 04:30:09,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:09,980 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:30:09,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:09,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:30:09,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:30:09,984 INFO L87 Difference]: Start difference. First operand 892 states and 1200 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) [2024-11-09 04:30:10,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:10,194 INFO L93 Difference]: Finished difference Result 1343 states and 1756 transitions. [2024-11-09 04:30:10,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:30:10,195 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 [2024-11-09 04:30:10,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:10,200 INFO L225 Difference]: With dead ends: 1343 [2024-11-09 04:30:10,201 INFO L226 Difference]: Without dead ends: 1075 [2024-11-09 04:30:10,202 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 [2024-11-09 04:30:10,203 INFO L432 NwaCegarLoop]: 231 mSDtfsCounter, 44 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:10,203 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 425 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:30:10,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2024-11-09 04:30:10,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 946. [2024-11-09 04:30:10,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 706 states have (on average 1.3427762039660056) internal successors, (948), 712 states have internal predecessors, (948), 146 states have call successors, (146), 93 states have call predecessors, (146), 92 states have return successors, (175), 142 states have call predecessors, (175), 145 states have call successors, (175) [2024-11-09 04:30:10,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 1269 transitions. [2024-11-09 04:30:10,330 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 1269 transitions. Word has length 61 [2024-11-09 04:30:10,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:10,330 INFO L471 AbstractCegarLoop]: Abstraction has 946 states and 1269 transitions. [2024-11-09 04:30:10,330 INFO L472 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) [2024-11-09 04:30:10,331 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 1269 transitions. [2024-11-09 04:30:10,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-09 04:30:10,333 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:10,333 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:10,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 04:30:10,333 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:30:10,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:10,334 INFO L85 PathProgramCache]: Analyzing trace with hash -2017715674, now seen corresponding path program 1 times [2024-11-09 04:30:10,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:10,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144535559] [2024-11-09 04:30:10,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:10,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:10,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:10,465 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 04:30:10,465 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:10,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144535559] [2024-11-09 04:30:10,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144535559] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:30:10,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140305977] [2024-11-09 04:30:10,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:10,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:10,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:30:10,468 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:30:10,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 04:30:10,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:10,605 INFO L255 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 04:30:10,608 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:30:10,649 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 04:30:10,649 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:30:10,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140305977] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:10,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:30:10,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 04:30:10,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027618028] [2024-11-09 04:30:10,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:10,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:30:10,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:10,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:30:10,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:30:10,651 INFO L87 Difference]: Start difference. First operand 946 states and 1269 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 04:30:10,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:10,909 INFO L93 Difference]: Finished difference Result 1834 states and 2627 transitions. [2024-11-09 04:30:10,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:30:10,910 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 81 [2024-11-09 04:30:10,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:10,919 INFO L225 Difference]: With dead ends: 1834 [2024-11-09 04:30:10,919 INFO L226 Difference]: Without dead ends: 1382 [2024-11-09 04:30:10,921 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:30:10,923 INFO L432 NwaCegarLoop]: 195 mSDtfsCounter, 208 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:10,923 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 306 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:30:10,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1382 states. [2024-11-09 04:30:11,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1382 to 1375. [2024-11-09 04:30:11,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1375 states, 1043 states have (on average 1.3576222435282839) internal successors, (1416), 1052 states have internal predecessors, (1416), 208 states have call successors, (208), 123 states have call predecessors, (208), 122 states have return successors, (263), 201 states have call predecessors, (263), 207 states have call successors, (263) [2024-11-09 04:30:11,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1375 states to 1375 states and 1887 transitions. [2024-11-09 04:30:11,082 INFO L78 Accepts]: Start accepts. Automaton has 1375 states and 1887 transitions. Word has length 81 [2024-11-09 04:30:11,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:11,083 INFO L471 AbstractCegarLoop]: Abstraction has 1375 states and 1887 transitions. [2024-11-09 04:30:11,083 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 04:30:11,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1375 states and 1887 transitions. [2024-11-09 04:30:11,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-09 04:30:11,088 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:11,089 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:11,109 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 04:30:11,289 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-09 04:30:11,290 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:30:11,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:11,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1297622522, now seen corresponding path program 1 times [2024-11-09 04:30:11,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:11,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364960300] [2024-11-09 04:30:11,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:11,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:11,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:11,395 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 04:30:11,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:11,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364960300] [2024-11-09 04:30:11,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364960300] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:30:11,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029738074] [2024-11-09 04:30:11,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:11,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:11,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:30:11,398 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:30:11,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 04:30:11,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:11,541 INFO L255 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 04:30:11,543 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:30:11,590 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 04:30:11,592 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:30:11,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029738074] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:11,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:30:11,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 04:30:11,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244856972] [2024-11-09 04:30:11,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:11,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:30:11,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:11,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:30:11,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:30:11,596 INFO L87 Difference]: Start difference. First operand 1375 states and 1887 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 04:30:11,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:11,926 INFO L93 Difference]: Finished difference Result 3106 states and 4501 transitions. [2024-11-09 04:30:11,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:30:11,927 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 81 [2024-11-09 04:30:11,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:11,940 INFO L225 Difference]: With dead ends: 3106 [2024-11-09 04:30:11,940 INFO L226 Difference]: Without dead ends: 2225 [2024-11-09 04:30:11,945 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:30:11,945 INFO L432 NwaCegarLoop]: 195 mSDtfsCounter, 205 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:11,947 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 306 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:30:11,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2024-11-09 04:30:12,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2213. [2024-11-09 04:30:12,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2213 states, 1702 states have (on average 1.36427732079906) internal successors, (2322), 1717 states have internal predecessors, (2322), 327 states have call successors, (327), 183 states have call predecessors, (327), 182 states have return successors, (430), 314 states have call predecessors, (430), 326 states have call successors, (430) [2024-11-09 04:30:12,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2213 states to 2213 states and 3079 transitions. [2024-11-09 04:30:12,176 INFO L78 Accepts]: Start accepts. Automaton has 2213 states and 3079 transitions. Word has length 81 [2024-11-09 04:30:12,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:12,176 INFO L471 AbstractCegarLoop]: Abstraction has 2213 states and 3079 transitions. [2024-11-09 04:30:12,176 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 04:30:12,177 INFO L276 IsEmpty]: Start isEmpty. Operand 2213 states and 3079 transitions. [2024-11-09 04:30:12,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-09 04:30:12,180 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:12,180 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:12,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 04:30:12,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 04:30:12,384 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:30:12,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:12,384 INFO L85 PathProgramCache]: Analyzing trace with hash -201906650, now seen corresponding path program 1 times [2024-11-09 04:30:12,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:12,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621922653] [2024-11-09 04:30:12,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:12,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:12,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:12,496 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 04:30:12,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:12,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621922653] [2024-11-09 04:30:12,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621922653] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:12,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:30:12,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:30:12,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812829343] [2024-11-09 04:30:12,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:12,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:30:12,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:12,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:30:12,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:30:12,502 INFO L87 Difference]: Start difference. First operand 2213 states and 3079 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-09 04:30:12,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:12,885 INFO L93 Difference]: Finished difference Result 4007 states and 5764 transitions. [2024-11-09 04:30:12,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:30:12,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 81 [2024-11-09 04:30:12,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:12,904 INFO L225 Difference]: With dead ends: 4007 [2024-11-09 04:30:12,905 INFO L226 Difference]: Without dead ends: 2629 [2024-11-09 04:30:12,910 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 [2024-11-09 04:30:12,911 INFO L432 NwaCegarLoop]: 260 mSDtfsCounter, 60 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:12,911 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 460 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:30:12,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2629 states. [2024-11-09 04:30:13,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2629 to 2457. [2024-11-09 04:30:13,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2457 states, 1930 states have (on average 1.3875647668393782) internal successors, (2678), 1945 states have internal predecessors, (2678), 335 states have call successors, (335), 191 states have call predecessors, (335), 190 states have return successors, (438), 322 states have call predecessors, (438), 334 states have call successors, (438) [2024-11-09 04:30:13,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2457 states to 2457 states and 3451 transitions. [2024-11-09 04:30:13,206 INFO L78 Accepts]: Start accepts. Automaton has 2457 states and 3451 transitions. Word has length 81 [2024-11-09 04:30:13,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:13,207 INFO L471 AbstractCegarLoop]: Abstraction has 2457 states and 3451 transitions. [2024-11-09 04:30:13,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-09 04:30:13,207 INFO L276 IsEmpty]: Start isEmpty. Operand 2457 states and 3451 transitions. [2024-11-09 04:30:13,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-09 04:30:13,212 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:13,212 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:13,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-09 04:30:13,212 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:30:13,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:13,213 INFO L85 PathProgramCache]: Analyzing trace with hash -819011130, now seen corresponding path program 1 times [2024-11-09 04:30:13,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:13,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771704853] [2024-11-09 04:30:13,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:13,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:13,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:13,607 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 04:30:13,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:13,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771704853] [2024-11-09 04:30:13,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771704853] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:30:13,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613296065] [2024-11-09 04:30:13,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:13,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:13,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:30:13,609 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:30:13,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 04:30:13,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:13,740 INFO L255 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 04:30:13,743 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:30:13,806 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 04:30:13,807 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:30:13,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613296065] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:13,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:30:13,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [14] total 15 [2024-11-09 04:30:13,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658333413] [2024-11-09 04:30:13,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:13,808 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:30:13,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:13,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:30:13,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-09 04:30:13,809 INFO L87 Difference]: Start difference. First operand 2457 states and 3451 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-09 04:30:14,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:14,141 INFO L93 Difference]: Finished difference Result 2794 states and 3876 transitions. [2024-11-09 04:30:14,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:30:14,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2024-11-09 04:30:14,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:14,157 INFO L225 Difference]: With dead ends: 2794 [2024-11-09 04:30:14,157 INFO L226 Difference]: Without dead ends: 2472 [2024-11-09 04:30:14,160 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-09 04:30:14,161 INFO L432 NwaCegarLoop]: 236 mSDtfsCounter, 47 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:14,161 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 426 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:30:14,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2024-11-09 04:30:14,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2453. [2024-11-09 04:30:14,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2453 states, 1926 states have (on average 1.3805815160955348) internal successors, (2659), 1941 states have internal predecessors, (2659), 335 states have call successors, (335), 191 states have call predecessors, (335), 190 states have return successors, (438), 322 states have call predecessors, (438), 334 states have call successors, (438) [2024-11-09 04:30:14,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 3432 transitions. [2024-11-09 04:30:14,452 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 3432 transitions. Word has length 102 [2024-11-09 04:30:14,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:14,453 INFO L471 AbstractCegarLoop]: Abstraction has 2453 states and 3432 transitions. [2024-11-09 04:30:14,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-09 04:30:14,453 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 3432 transitions. [2024-11-09 04:30:14,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-09 04:30:14,465 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:14,465 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:14,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 04:30:14,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 04:30:14,665 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:30:14,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:14,666 INFO L85 PathProgramCache]: Analyzing trace with hash 757546629, now seen corresponding path program 1 times [2024-11-09 04:30:14,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:14,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132366649] [2024-11-09 04:30:14,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:14,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:14,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:15,052 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-09 04:30:15,052 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:15,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132366649] [2024-11-09 04:30:15,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132366649] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:30:15,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442402784] [2024-11-09 04:30:15,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:15,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:15,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:30:15,055 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:30:15,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 04:30:15,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:15,185 INFO L255 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 04:30:15,188 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:30:15,258 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 04:30:15,259 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:30:15,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442402784] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:15,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:30:15,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2024-11-09 04:30:15,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026381769] [2024-11-09 04:30:15,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:15,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 04:30:15,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:15,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 04:30:15,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2024-11-09 04:30:15,262 INFO L87 Difference]: Start difference. First operand 2453 states and 3432 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-09 04:30:15,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:15,666 INFO L93 Difference]: Finished difference Result 2790 states and 3837 transitions. [2024-11-09 04:30:15,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:30:15,667 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2024-11-09 04:30:15,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:15,679 INFO L225 Difference]: With dead ends: 2790 [2024-11-09 04:30:15,679 INFO L226 Difference]: Without dead ends: 2311 [2024-11-09 04:30:15,681 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2024-11-09 04:30:15,682 INFO L432 NwaCegarLoop]: 210 mSDtfsCounter, 164 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:15,682 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 795 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:30:15,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2311 states. [2024-11-09 04:30:15,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2311 to 2307. [2024-11-09 04:30:15,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2307 states, 1831 states have (on average 1.3894046968869471) internal successors, (2544), 1846 states have internal predecessors, (2544), 307 states have call successors, (307), 168 states have call predecessors, (307), 167 states have return successors, (410), 294 states have call predecessors, (410), 306 states have call successors, (410) [2024-11-09 04:30:15,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2307 states to 2307 states and 3261 transitions. [2024-11-09 04:30:15,935 INFO L78 Accepts]: Start accepts. Automaton has 2307 states and 3261 transitions. Word has length 102 [2024-11-09 04:30:15,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:15,936 INFO L471 AbstractCegarLoop]: Abstraction has 2307 states and 3261 transitions. [2024-11-09 04:30:15,936 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-09 04:30:15,936 INFO L276 IsEmpty]: Start isEmpty. Operand 2307 states and 3261 transitions. [2024-11-09 04:30:15,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-09 04:30:15,941 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:15,941 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:15,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 04:30:16,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 04:30:16,146 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:30:16,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:16,146 INFO L85 PathProgramCache]: Analyzing trace with hash 479149980, now seen corresponding path program 1 times [2024-11-09 04:30:16,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:16,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334696851] [2024-11-09 04:30:16,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:16,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:16,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:16,378 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 04:30:16,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:16,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334696851] [2024-11-09 04:30:16,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334696851] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:30:16,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210364851] [2024-11-09 04:30:16,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:16,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:16,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:30:16,381 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:30:16,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 04:30:16,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:16,508 INFO L255 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 04:30:16,511 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:30:16,555 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 04:30:16,555 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:30:16,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210364851] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:16,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:30:16,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2024-11-09 04:30:16,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856613362] [2024-11-09 04:30:16,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:16,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:30:16,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:16,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:30:16,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-09 04:30:16,559 INFO L87 Difference]: Start difference. First operand 2307 states and 3261 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-09 04:30:16,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:16,846 INFO L93 Difference]: Finished difference Result 2554 states and 3569 transitions. [2024-11-09 04:30:16,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:30:16,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 104 [2024-11-09 04:30:16,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:16,861 INFO L225 Difference]: With dead ends: 2554 [2024-11-09 04:30:16,861 INFO L226 Difference]: Without dead ends: 2308 [2024-11-09 04:30:16,863 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-09 04:30:16,864 INFO L432 NwaCegarLoop]: 229 mSDtfsCounter, 53 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:16,864 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 405 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:30:16,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2024-11-09 04:30:17,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 2230. [2024-11-09 04:30:17,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2230 states, 1775 states have (on average 1.3876056338028169) internal successors, (2463), 1790 states have internal predecessors, (2463), 296 states have call successors, (296), 158 states have call predecessors, (296), 157 states have return successors, (399), 283 states have call predecessors, (399), 295 states have call successors, (399) [2024-11-09 04:30:17,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 3158 transitions. [2024-11-09 04:30:17,121 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 3158 transitions. Word has length 104 [2024-11-09 04:30:17,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:17,122 INFO L471 AbstractCegarLoop]: Abstraction has 2230 states and 3158 transitions. [2024-11-09 04:30:17,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-09 04:30:17,122 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 3158 transitions. [2024-11-09 04:30:17,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-09 04:30:17,127 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:17,128 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:17,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 04:30:17,328 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 04:30:17,330 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:30:17,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:17,331 INFO L85 PathProgramCache]: Analyzing trace with hash 79158781, now seen corresponding path program 1 times [2024-11-09 04:30:17,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:17,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66465299] [2024-11-09 04:30:17,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:17,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:17,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:17,560 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-09 04:30:17,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:17,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66465299] [2024-11-09 04:30:17,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66465299] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:30:17,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127533555] [2024-11-09 04:30:17,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:17,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:17,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:30:17,563 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:30:17,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 04:30:17,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:17,696 INFO L255 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 04:30:17,699 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:30:18,084 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 04:30:18,084 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:30:18,269 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-09 04:30:18,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127533555] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:30:18,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [676922689] [2024-11-09 04:30:18,273 INFO L159 IcfgInterpreter]: Started Sifa with 65 locations of interest [2024-11-09 04:30:18,273 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:30:18,273 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:30:18,274 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:30:18,274 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:30:30,520 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 169 for LOIs [2024-11-09 04:30:30,735 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 133 for LOIs [2024-11-09 04:30:30,934 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 90 for LOIs [2024-11-09 04:30:30,963 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 154 for LOIs [2024-11-09 04:30:32,990 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 155 for LOIs [2024-11-09 04:30:34,703 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 104 for LOIs [2024-11-09 04:30:34,830 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 148 for LOIs [2024-11-09 04:30:35,026 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 159 for LOIs [2024-11-09 04:30:35,237 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:31:03,661 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '63101#(and (= ~q_req_up~0 1) (= ~q_free~0 1) (exists ((|v_ULTIMATE.start_eval1_~tmp___0~2#1_16| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp___0~2#1_16| 0)) (<= |v_ULTIMATE.start_eval1_~tmp___0~2#1_16| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp___0~2#1_16| 2147483648)))) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~q_buf_0~0) (exists ((v_~c_last_read~0_10 Int) (v_~q_free~0_44 Int)) (and (<= v_~q_free~0_44 1) (not (= ~p_dw_st~0 0)) (<= 1 |#StackHeapBarrier|) (= ~E_4~0 2) (= v_~c_last_read~0_10 0) (= ~t1_pc~0 0) (<= ~p_dw_pc~0 1) (= ~T4_E~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= ~t2_i~0 0) (= ~t4_i~0 0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~m_i~0 0) (<= 0 (+ ~q_buf_0~0 2147483648)) (= ~E_2~0 2) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= ~token~0 0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~p_last_write~0 2147483647) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= 0 ~t4_pc~0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~M_E~0 2) (<= 0 v_~q_free~0_44) (not (= v_~q_free~0_44 1)) (= ~t1_i~0 0))) (= ~c_dr_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (= ~c_dr_st~0 1))' at error location [2024-11-09 04:31:03,662 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:31:03,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:31:03,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 13 [2024-11-09 04:31:03,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163888308] [2024-11-09 04:31:03,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:31:03,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 04:31:03,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:31:03,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 04:31:03,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=2973, Unknown=0, NotChecked=0, Total=3306 [2024-11-09 04:31:03,668 INFO L87 Difference]: Start difference. First operand 2230 states and 3158 transitions. Second operand has 13 states, 12 states have (on average 13.166666666666666) internal successors, (158), 12 states have internal predecessors, (158), 9 states have call successors, (42), 5 states have call predecessors, (42), 5 states have return successors, (41), 10 states have call predecessors, (41), 9 states have call successors, (41) [2024-11-09 04:31:08,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:31:08,021 INFO L93 Difference]: Finished difference Result 3170 states and 4245 transitions. [2024-11-09 04:31:08,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-09 04:31:08,022 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 13.166666666666666) internal successors, (158), 12 states have internal predecessors, (158), 9 states have call successors, (42), 5 states have call predecessors, (42), 5 states have return successors, (41), 10 states have call predecessors, (41), 9 states have call successors, (41) Word has length 104 [2024-11-09 04:31:08,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:31:08,044 INFO L225 Difference]: With dead ends: 3170 [2024-11-09 04:31:08,044 INFO L226 Difference]: Without dead ends: 2988 [2024-11-09 04:31:08,052 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 274 SyntacticMatches, 6 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 4738 ImplicationChecksByTransitivity, 30.6s TimeCoverageRelationStatistics Valid=1088, Invalid=12252, Unknown=0, NotChecked=0, Total=13340 [2024-11-09 04:31:08,053 INFO L432 NwaCegarLoop]: 217 mSDtfsCounter, 1074 mSDsluCounter, 1342 mSDsCounter, 0 mSdLazyCounter, 1986 mSolverCounterSat, 422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1079 SdHoareTripleChecker+Valid, 1559 SdHoareTripleChecker+Invalid, 2408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 422 IncrementalHoareTripleChecker+Valid, 1986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-09 04:31:08,053 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1079 Valid, 1559 Invalid, 2408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [422 Valid, 1986 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-09 04:31:08,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2988 states. [2024-11-09 04:31:08,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2988 to 2625. [2024-11-09 04:31:08,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2625 states, 2060 states have (on average 1.358252427184466) internal successors, (2798), 2075 states have internal predecessors, (2798), 354 states have call successors, (354), 210 states have call predecessors, (354), 209 states have return successors, (457), 341 states have call predecessors, (457), 353 states have call successors, (457) [2024-11-09 04:31:08,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2625 states to 2625 states and 3609 transitions. [2024-11-09 04:31:08,504 INFO L78 Accepts]: Start accepts. Automaton has 2625 states and 3609 transitions. Word has length 104 [2024-11-09 04:31:08,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:31:08,504 INFO L471 AbstractCegarLoop]: Abstraction has 2625 states and 3609 transitions. [2024-11-09 04:31:08,505 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 13.166666666666666) internal successors, (158), 12 states have internal predecessors, (158), 9 states have call successors, (42), 5 states have call predecessors, (42), 5 states have return successors, (41), 10 states have call predecessors, (41), 9 states have call successors, (41) [2024-11-09 04:31:08,505 INFO L276 IsEmpty]: Start isEmpty. Operand 2625 states and 3609 transitions. [2024-11-09 04:31:08,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-09 04:31:08,513 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:31:08,513 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:31:08,542 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 04:31:08,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 04:31:08,717 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:31:08,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:31:08,718 INFO L85 PathProgramCache]: Analyzing trace with hash -2107254027, now seen corresponding path program 1 times [2024-11-09 04:31:08,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:31:08,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044481521] [2024-11-09 04:31:08,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:31:08,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:31:08,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:31:08,790 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-09 04:31:08,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:31:08,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044481521] [2024-11-09 04:31:08,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044481521] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:31:08,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:31:08,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:31:08,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333701061] [2024-11-09 04:31:08,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:31:08,793 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:31:08,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:31:08,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:31:08,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:31:08,794 INFO L87 Difference]: Start difference. First operand 2625 states and 3609 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2024-11-09 04:31:09,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:31:09,272 INFO L93 Difference]: Finished difference Result 3124 states and 4181 transitions. [2024-11-09 04:31:09,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:31:09,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 108 [2024-11-09 04:31:09,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:31:09,295 INFO L225 Difference]: With dead ends: 3124 [2024-11-09 04:31:09,295 INFO L226 Difference]: Without dead ends: 2615 [2024-11-09 04:31:09,298 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 [2024-11-09 04:31:09,302 INFO L432 NwaCegarLoop]: 233 mSDtfsCounter, 210 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:31:09,303 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 299 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:31:09,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2615 states. [2024-11-09 04:31:09,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2615 to 2606. [2024-11-09 04:31:09,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2606 states, 2043 states have (on average 1.353891336270191) internal successors, (2766), 2058 states have internal predecessors, (2766), 353 states have call successors, (353), 209 states have call predecessors, (353), 208 states have return successors, (456), 340 states have call predecessors, (456), 352 states have call successors, (456) [2024-11-09 04:31:09,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2606 states to 2606 states and 3575 transitions. [2024-11-09 04:31:09,696 INFO L78 Accepts]: Start accepts. Automaton has 2606 states and 3575 transitions. Word has length 108 [2024-11-09 04:31:09,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:31:09,697 INFO L471 AbstractCegarLoop]: Abstraction has 2606 states and 3575 transitions. [2024-11-09 04:31:09,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2024-11-09 04:31:09,698 INFO L276 IsEmpty]: Start isEmpty. Operand 2606 states and 3575 transitions. [2024-11-09 04:31:09,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-09 04:31:09,706 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:31:09,706 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:31:09,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-09 04:31:09,707 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:31:09,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:31:09,707 INFO L85 PathProgramCache]: Analyzing trace with hash 126931533, now seen corresponding path program 1 times [2024-11-09 04:31:09,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:31:09,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896632857] [2024-11-09 04:31:09,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:31:09,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:31:09,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:31:09,923 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-09 04:31:09,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:31:09,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896632857] [2024-11-09 04:31:09,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896632857] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:31:09,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066208766] [2024-11-09 04:31:09,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:31:09,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:31:09,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:31:09,927 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:31:09,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 04:31:10,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:31:10,095 INFO L255 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 04:31:10,098 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:31:10,198 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 04:31:10,199 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:31:10,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066208766] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:31:10,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:31:10,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2024-11-09 04:31:10,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163160764] [2024-11-09 04:31:10,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:31:10,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 04:31:10,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:31:10,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 04:31:10,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-11-09 04:31:10,203 INFO L87 Difference]: Start difference. First operand 2606 states and 3575 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-09 04:31:10,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:31:10,852 INFO L93 Difference]: Finished difference Result 3126 states and 4169 transitions. [2024-11-09 04:31:10,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 04:31:10,853 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2024-11-09 04:31:10,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:31:10,884 INFO L225 Difference]: With dead ends: 3126 [2024-11-09 04:31:10,887 INFO L226 Difference]: Without dead ends: 2577 [2024-11-09 04:31:10,891 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-11-09 04:31:10,893 INFO L432 NwaCegarLoop]: 222 mSDtfsCounter, 44 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 1052 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:31:10,894 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 1052 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:31:10,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2577 states. [2024-11-09 04:31:11,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2577 to 2517. [2024-11-09 04:31:11,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2517 states, 1982 states have (on average 1.360242179616549) internal successors, (2696), 1997 states have internal predecessors, (2696), 338 states have call successors, (338), 196 states have call predecessors, (338), 195 states have return successors, (441), 325 states have call predecessors, (441), 337 states have call successors, (441) [2024-11-09 04:31:11,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2517 states to 2517 states and 3475 transitions. [2024-11-09 04:31:11,358 INFO L78 Accepts]: Start accepts. Automaton has 2517 states and 3475 transitions. Word has length 112 [2024-11-09 04:31:11,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:31:11,358 INFO L471 AbstractCegarLoop]: Abstraction has 2517 states and 3475 transitions. [2024-11-09 04:31:11,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-09 04:31:11,360 INFO L276 IsEmpty]: Start isEmpty. Operand 2517 states and 3475 transitions. [2024-11-09 04:31:11,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-09 04:31:11,367 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:31:11,368 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:31:11,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 04:31:11,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 04:31:11,572 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:31:11,573 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:31:11,573 INFO L85 PathProgramCache]: Analyzing trace with hash -409918542, now seen corresponding path program 1 times [2024-11-09 04:31:11,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:31:11,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621692262] [2024-11-09 04:31:11,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:31:11,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:31:11,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:31:11,755 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-09 04:31:11,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:31:11,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621692262] [2024-11-09 04:31:11,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621692262] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:31:11,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:31:11,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 04:31:11,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190619033] [2024-11-09 04:31:11,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:31:11,758 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 04:31:11,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:31:11,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 04:31:11,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:31:11,759 INFO L87 Difference]: Start difference. First operand 2517 states and 3475 transitions. Second operand has 6 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-09 04:31:12,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:31:12,335 INFO L93 Difference]: Finished difference Result 3266 states and 4320 transitions. [2024-11-09 04:31:12,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 04:31:12,335 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2024-11-09 04:31:12,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:31:12,352 INFO L225 Difference]: With dead ends: 3266 [2024-11-09 04:31:12,352 INFO L226 Difference]: Without dead ends: 2809 [2024-11-09 04:31:12,356 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-09 04:31:12,357 INFO L432 NwaCegarLoop]: 227 mSDtfsCounter, 199 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 968 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:31:12,357 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 968 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:31:12,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2809 states. [2024-11-09 04:31:12,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2809 to 2775. [2024-11-09 04:31:12,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2775 states, 2144 states have (on average 1.3414179104477613) internal successors, (2876), 2165 states have internal predecessors, (2876), 386 states have call successors, (386), 238 states have call predecessors, (386), 243 states have return successors, (501), 373 states have call predecessors, (501), 385 states have call successors, (501) [2024-11-09 04:31:12,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2775 states to 2775 states and 3763 transitions. [2024-11-09 04:31:12,843 INFO L78 Accepts]: Start accepts. Automaton has 2775 states and 3763 transitions. Word has length 113 [2024-11-09 04:31:12,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:31:12,844 INFO L471 AbstractCegarLoop]: Abstraction has 2775 states and 3763 transitions. [2024-11-09 04:31:12,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-09 04:31:12,845 INFO L276 IsEmpty]: Start isEmpty. Operand 2775 states and 3763 transitions. [2024-11-09 04:31:12,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-11-09 04:31:12,852 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:31:12,852 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:31:12,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-09 04:31:12,853 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:31:12,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:31:12,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1736616306, now seen corresponding path program 1 times [2024-11-09 04:31:12,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:31:12,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715451251] [2024-11-09 04:31:12,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:31:12,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:31:12,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:31:13,964 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 04:31:13,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:31:13,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715451251] [2024-11-09 04:31:13,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715451251] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:31:13,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306503335] [2024-11-09 04:31:13,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:31:13,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:31:13,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:31:13,967 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:31:13,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 04:31:14,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:31:14,136 INFO L255 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-09 04:31:14,141 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:31:15,350 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 04:31:15,350 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:31:17,459 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-09 04:31:17,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306503335] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:31:17,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2059858295] [2024-11-09 04:31:17,463 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2024-11-09 04:31:17,463 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:31:17,464 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:31:17,464 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:31:17,464 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:31:40,916 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 180 for LOIs [2024-11-09 04:31:41,055 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 13 for LOIs [2024-11-09 04:31:41,057 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2024-11-09 04:31:41,060 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 144 for LOIs [2024-11-09 04:31:41,924 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 145 for LOIs [2024-11-09 04:31:42,555 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 21 for LOIs [2024-11-09 04:31:42,586 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 138 for LOIs [2024-11-09 04:31:42,694 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 149 for LOIs [2024-11-09 04:31:42,825 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:31:56,254 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '96172#(and (= ~q_req_up~0 1) (= ~q_free~0 1) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~p_last_write~0))' at error location [2024-11-09 04:31:56,254 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:31:56,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:31:56,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 15, 16] total 49 [2024-11-09 04:31:56,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675101469] [2024-11-09 04:31:56,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:31:56,255 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-09 04:31:56,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:31:56,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-09 04:31:56,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=804, Invalid=8702, Unknown=0, NotChecked=0, Total=9506 [2024-11-09 04:31:56,260 INFO L87 Difference]: Start difference. First operand 2775 states and 3763 transitions. Second operand has 49 states, 34 states have (on average 5.735294117647059) internal successors, (195), 38 states have internal predecessors, (195), 21 states have call successors, (44), 16 states have call predecessors, (44), 22 states have return successors, (46), 20 states have call predecessors, (46), 21 states have call successors, (46) [2024-11-09 04:32:16,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:32:16,110 INFO L93 Difference]: Finished difference Result 5563 states and 7150 transitions. [2024-11-09 04:32:16,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 245 states. [2024-11-09 04:32:16,111 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 34 states have (on average 5.735294117647059) internal successors, (195), 38 states have internal predecessors, (195), 21 states have call successors, (44), 16 states have call predecessors, (44), 22 states have return successors, (46), 20 states have call predecessors, (46), 21 states have call successors, (46) Word has length 114 [2024-11-09 04:32:16,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:32:16,130 INFO L225 Difference]: With dead ends: 5563 [2024-11-09 04:32:16,130 INFO L226 Difference]: Without dead ends: 4848 [2024-11-09 04:32:16,157 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 639 GetRequests, 297 SyntacticMatches, 6 SemanticMatches, 336 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 46367 ImplicationChecksByTransitivity, 28.0s TimeCoverageRelationStatistics Valid=11134, Invalid=102772, Unknown=0, NotChecked=0, Total=113906 [2024-11-09 04:32:16,158 INFO L432 NwaCegarLoop]: 216 mSDtfsCounter, 4928 mSDsluCounter, 2939 mSDsCounter, 0 mSdLazyCounter, 5446 mSolverCounterSat, 2436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4928 SdHoareTripleChecker+Valid, 3155 SdHoareTripleChecker+Invalid, 7882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2436 IncrementalHoareTripleChecker+Valid, 5446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:32:16,158 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4928 Valid, 3155 Invalid, 7882 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2436 Valid, 5446 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2024-11-09 04:32:16,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4848 states. [2024-11-09 04:32:16,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4848 to 3051. [2024-11-09 04:32:16,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3051 states, 2328 states have (on average 1.3260309278350515) internal successors, (3087), 2351 states have internal predecessors, (3087), 431 states have call successors, (431), 275 states have call predecessors, (431), 290 states have return successors, (558), 426 states have call predecessors, (558), 430 states have call successors, (558) [2024-11-09 04:32:16,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3051 states to 3051 states and 4076 transitions. [2024-11-09 04:32:16,829 INFO L78 Accepts]: Start accepts. Automaton has 3051 states and 4076 transitions. Word has length 114 [2024-11-09 04:32:16,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:32:16,830 INFO L471 AbstractCegarLoop]: Abstraction has 3051 states and 4076 transitions. [2024-11-09 04:32:16,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 34 states have (on average 5.735294117647059) internal successors, (195), 38 states have internal predecessors, (195), 21 states have call successors, (44), 16 states have call predecessors, (44), 22 states have return successors, (46), 20 states have call predecessors, (46), 21 states have call successors, (46) [2024-11-09 04:32:16,831 INFO L276 IsEmpty]: Start isEmpty. Operand 3051 states and 4076 transitions. [2024-11-09 04:32:16,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-09 04:32:16,839 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:32:16,839 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:32:16,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 04:32:17,040 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:32:17,041 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:32:17,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:32:17,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1676704681, now seen corresponding path program 1 times [2024-11-09 04:32:17,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:32:17,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659753857] [2024-11-09 04:32:17,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:32:17,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:32:17,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:32:17,141 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-09 04:32:17,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:32:17,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659753857] [2024-11-09 04:32:17,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659753857] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:32:17,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:32:17,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:32:17,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019716227] [2024-11-09 04:32:17,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:32:17,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:32:17,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:32:17,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:32:17,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:32:17,144 INFO L87 Difference]: Start difference. First operand 3051 states and 4076 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 04:32:18,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:32:18,265 INFO L93 Difference]: Finished difference Result 6888 states and 9793 transitions. [2024-11-09 04:32:18,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:32:18,265 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 108 [2024-11-09 04:32:18,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:32:18,295 INFO L225 Difference]: With dead ends: 6888 [2024-11-09 04:32:18,295 INFO L226 Difference]: Without dead ends: 4925 [2024-11-09 04:32:18,304 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 [2024-11-09 04:32:18,305 INFO L432 NwaCegarLoop]: 195 mSDtfsCounter, 201 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:32:18,305 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 306 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:32:18,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4925 states. [2024-11-09 04:32:19,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4925 to 4895. [2024-11-09 04:32:19,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4895 states, 3808 states have (on average 1.3453256302521008) internal successors, (5123), 3843 states have internal predecessors, (5123), 667 states have call successors, (667), 403 states have call predecessors, (667), 418 states have return successors, (882), 650 states have call predecessors, (882), 666 states have call successors, (882) [2024-11-09 04:32:19,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4895 states to 4895 states and 6672 transitions. [2024-11-09 04:32:19,086 INFO L78 Accepts]: Start accepts. Automaton has 4895 states and 6672 transitions. Word has length 108 [2024-11-09 04:32:19,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:32:19,087 INFO L471 AbstractCegarLoop]: Abstraction has 4895 states and 6672 transitions. [2024-11-09 04:32:19,087 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 04:32:19,087 INFO L276 IsEmpty]: Start isEmpty. Operand 4895 states and 6672 transitions. [2024-11-09 04:32:19,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-11-09 04:32:19,102 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:32:19,103 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:32:19,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-09 04:32:19,103 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:32:19,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:32:19,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1462421837, now seen corresponding path program 1 times [2024-11-09 04:32:19,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:32:19,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401170667] [2024-11-09 04:32:19,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:32:19,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:32:19,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:32:19,451 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 04:32:19,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:32:19,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401170667] [2024-11-09 04:32:19,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401170667] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:32:19,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371431008] [2024-11-09 04:32:19,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:32:19,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:32:19,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:32:19,454 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:32:19,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 04:32:19,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:32:19,607 INFO L255 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 04:32:19,610 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:32:19,718 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-09 04:32:19,718 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:32:19,953 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 04:32:19,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371431008] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 04:32:19,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 04:32:19,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2024-11-09 04:32:19,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652027141] [2024-11-09 04:32:19,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:32:19,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 04:32:19,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:32:19,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 04:32:19,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2024-11-09 04:32:19,956 INFO L87 Difference]: Start difference. First operand 4895 states and 6672 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-09 04:32:21,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:32:21,485 INFO L93 Difference]: Finished difference Result 6219 states and 8220 transitions. [2024-11-09 04:32:21,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 04:32:21,486 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2024-11-09 04:32:21,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:32:21,508 INFO L225 Difference]: With dead ends: 6219 [2024-11-09 04:32:21,508 INFO L226 Difference]: Without dead ends: 5228 [2024-11-09 04:32:21,513 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2024-11-09 04:32:21,514 INFO L432 NwaCegarLoop]: 191 mSDtfsCounter, 297 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 04:32:21,514 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 650 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 04:32:21,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5228 states. [2024-11-09 04:32:22,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5228 to 4975. [2024-11-09 04:32:22,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4975 states, 3853 states have (on average 1.3428497274850766) internal successors, (5174), 3891 states have internal predecessors, (5174), 686 states have call successors, (686), 412 states have call predecessors, (686), 434 states have return successors, (922), 673 states have call predecessors, (922), 685 states have call successors, (922) [2024-11-09 04:32:22,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4975 states to 4975 states and 6782 transitions. [2024-11-09 04:32:22,389 INFO L78 Accepts]: Start accepts. Automaton has 4975 states and 6782 transitions. Word has length 115 [2024-11-09 04:32:22,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:32:22,390 INFO L471 AbstractCegarLoop]: Abstraction has 4975 states and 6782 transitions. [2024-11-09 04:32:22,390 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-09 04:32:22,390 INFO L276 IsEmpty]: Start isEmpty. Operand 4975 states and 6782 transitions. [2024-11-09 04:32:22,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-09 04:32:22,403 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:32:22,403 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:32:22,425 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 04:32:22,604 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-09 04:32:22,604 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:32:22,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:32:22,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1837114143, now seen corresponding path program 1 times [2024-11-09 04:32:22,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:32:22,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850732070] [2024-11-09 04:32:22,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:32:22,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:32:22,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:32:23,761 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-09 04:32:23,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:32:23,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850732070] [2024-11-09 04:32:23,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850732070] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:32:23,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935845731] [2024-11-09 04:32:23,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:32:23,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:32:23,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:32:23,764 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:32:23,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 04:32:23,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:32:23,919 INFO L255 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-09 04:32:23,923 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:32:24,928 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 04:32:24,928 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:32:26,694 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-09 04:32:26,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935845731] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:32:26,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [152414206] [2024-11-09 04:32:26,697 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2024-11-09 04:32:26,697 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:32:26,698 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:32:26,698 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:32:26,698 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:32:38,221 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 181 for LOIs [2024-11-09 04:32:38,374 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 77 for LOIs [2024-11-09 04:32:38,407 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2024-11-09 04:32:38,411 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 145 for LOIs [2024-11-09 04:32:39,066 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 146 for LOIs [2024-11-09 04:32:39,763 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 21 for LOIs [2024-11-09 04:32:39,795 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 139 for LOIs [2024-11-09 04:32:39,909 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 150 for LOIs [2024-11-09 04:32:40,048 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:32:56,220 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '141812#(and (= ~q_req_up~0 1) (= ~q_free~0 1) (= ~c_dr_pc~0 1) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~q_buf_0~0) (exists ((v_~q_req_up~0_99 Int) (v_~q_free~0_102 Int)) (and (or (= ~p_dw_st~0 0) (exists ((v_~p_dw_st~0_138 Int) (v_~p_dw_pc~0_48 Int)) (and (or (and (= v_~p_dw_st~0_138 1) (= v_~p_dw_pc~0_48 0)) (and (<= 0 (+ ~q_buf_0~0 2147483648)) (= v_~p_dw_st~0_138 1) (<= ~p_last_write~0 2147483647) (= v_~q_req_up~0_99 1))) (or (and (exists ((|v_ULTIMATE.start_eval1_~tmp~2#1_70| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp~2#1_70| 0)) (<= |v_ULTIMATE.start_eval1_~tmp~2#1_70| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp~2#1_70| 2147483648)))) (= v_~p_dw_pc~0_48 1)) (and (exists ((|v_ULTIMATE.start_eval1_~tmp~2#1_70| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp~2#1_70| 0)) (<= |v_ULTIMATE.start_eval1_~tmp~2#1_70| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp~2#1_70| 2147483648)))) (= v_~p_dw_pc~0_48 0)))))) (or (and (= v_~q_free~0_102 0) (= ~p_dw_pc~0 1) (= 2 ~p_dw_st~0)) (and (<= v_~q_free~0_102 1) (<= 0 ~p_dw_pc~0) (= ~p_dw_st~0 0))))) (= ~c_last_read~0 ~p_last_write~0) (exists ((|v_ULTIMATE.start_eval1_~tmp___0~2#1_44| Int)) (and (<= |v_ULTIMATE.start_eval1_~tmp___0~2#1_44| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp___0~2#1_44| 2147483648)) (not (= |v_ULTIMATE.start_eval1_~tmp___0~2#1_44| 0)))) (= ~c_dr_st~0 1))' at error location [2024-11-09 04:32:56,220 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:32:56,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:32:56,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 16, 18] total 53 [2024-11-09 04:32:56,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580292479] [2024-11-09 04:32:56,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:32:56,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-09 04:32:56,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:32:56,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-09 04:32:56,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=971, Invalid=10159, Unknown=0, NotChecked=0, Total=11130 [2024-11-09 04:32:56,225 INFO L87 Difference]: Start difference. First operand 4975 states and 6782 transitions. Second operand has 53 states, 37 states have (on average 5.783783783783784) internal successors, (214), 40 states have internal predecessors, (214), 27 states have call successors, (49), 19 states have call predecessors, (49), 22 states have return successors, (51), 25 states have call predecessors, (51), 27 states have call successors, (51) [2024-11-09 04:33:10,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:33:10,170 INFO L93 Difference]: Finished difference Result 7259 states and 9484 transitions. [2024-11-09 04:33:10,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2024-11-09 04:33:10,171 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 37 states have (on average 5.783783783783784) internal successors, (214), 40 states have internal predecessors, (214), 27 states have call successors, (49), 19 states have call predecessors, (49), 22 states have return successors, (51), 25 states have call predecessors, (51), 27 states have call successors, (51) Word has length 124 [2024-11-09 04:33:10,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:33:10,199 INFO L225 Difference]: With dead ends: 7259 [2024-11-09 04:33:10,199 INFO L226 Difference]: Without dead ends: 6188 [2024-11-09 04:33:10,215 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 327 SyntacticMatches, 2 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 25670 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=6778, Invalid=59014, Unknown=0, NotChecked=0, Total=65792 [2024-11-09 04:33:10,216 INFO L432 NwaCegarLoop]: 194 mSDtfsCounter, 4758 mSDsluCounter, 2256 mSDsCounter, 0 mSdLazyCounter, 4776 mSolverCounterSat, 2481 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4758 SdHoareTripleChecker+Valid, 2450 SdHoareTripleChecker+Invalid, 7257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2481 IncrementalHoareTripleChecker+Valid, 4776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-11-09 04:33:10,216 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4758 Valid, 2450 Invalid, 7257 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2481 Valid, 4776 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2024-11-09 04:33:10,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6188 states. [2024-11-09 04:33:11,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6188 to 4791. [2024-11-09 04:33:11,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4791 states, 3741 states have (on average 1.3488372093023255) internal successors, (5046), 3778 states have internal predecessors, (5046), 646 states have call successors, (646), 380 states have call predecessors, (646), 402 states have return successors, (872), 634 states have call predecessors, (872), 645 states have call successors, (872) [2024-11-09 04:33:11,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4791 states to 4791 states and 6564 transitions. [2024-11-09 04:33:11,313 INFO L78 Accepts]: Start accepts. Automaton has 4791 states and 6564 transitions. Word has length 124 [2024-11-09 04:33:11,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:33:11,314 INFO L471 AbstractCegarLoop]: Abstraction has 4791 states and 6564 transitions. [2024-11-09 04:33:11,314 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 37 states have (on average 5.783783783783784) internal successors, (214), 40 states have internal predecessors, (214), 27 states have call successors, (49), 19 states have call predecessors, (49), 22 states have return successors, (51), 25 states have call predecessors, (51), 27 states have call successors, (51) [2024-11-09 04:33:11,314 INFO L276 IsEmpty]: Start isEmpty. Operand 4791 states and 6564 transitions. [2024-11-09 04:33:11,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-09 04:33:11,329 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:33:11,329 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:33:11,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 04:33:11,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-09 04:33:11,530 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:33:11,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:33:11,531 INFO L85 PathProgramCache]: Analyzing trace with hash -2093292826, now seen corresponding path program 1 times [2024-11-09 04:33:11,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:33:11,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491519020] [2024-11-09 04:33:11,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:33:11,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:33:11,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:33:11,809 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-09 04:33:11,810 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:33:11,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491519020] [2024-11-09 04:33:11,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491519020] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:33:11,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105479255] [2024-11-09 04:33:11,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:33:11,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:33:11,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:33:11,813 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:33:11,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 04:33:11,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:33:11,980 INFO L255 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 04:33:11,984 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:33:12,131 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 04:33:12,131 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:33:12,387 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 04:33:12,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105479255] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 04:33:12,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 04:33:12,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2024-11-09 04:33:12,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574443294] [2024-11-09 04:33:12,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:33:12,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 04:33:12,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:33:12,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 04:33:12,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-09 04:33:12,390 INFO L87 Difference]: Start difference. First operand 4791 states and 6564 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-09 04:33:13,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:33:13,961 INFO L93 Difference]: Finished difference Result 5446 states and 7305 transitions. [2024-11-09 04:33:13,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 04:33:13,962 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2024-11-09 04:33:13,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:33:13,987 INFO L225 Difference]: With dead ends: 5446 [2024-11-09 04:33:13,988 INFO L226 Difference]: Without dead ends: 4559 [2024-11-09 04:33:13,993 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2024-11-09 04:33:13,994 INFO L432 NwaCegarLoop]: 180 mSDtfsCounter, 471 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 04:33:13,994 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 434 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 04:33:13,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4559 states. [2024-11-09 04:33:15,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4559 to 4522. [2024-11-09 04:33:15,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4522 states, 3542 states have (on average 1.3554488989271598) internal successors, (4801), 3579 states have internal predecessors, (4801), 610 states have call successors, (610), 350 states have call predecessors, (610), 368 states have return successors, (831), 594 states have call predecessors, (831), 609 states have call successors, (831) [2024-11-09 04:33:15,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4522 states to 4522 states and 6242 transitions. [2024-11-09 04:33:15,102 INFO L78 Accepts]: Start accepts. Automaton has 4522 states and 6242 transitions. Word has length 125 [2024-11-09 04:33:15,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:33:15,103 INFO L471 AbstractCegarLoop]: Abstraction has 4522 states and 6242 transitions. [2024-11-09 04:33:15,103 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-09 04:33:15,103 INFO L276 IsEmpty]: Start isEmpty. Operand 4522 states and 6242 transitions. [2024-11-09 04:33:15,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 04:33:15,119 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:33:15,119 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:33:15,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 04:33:15,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:33:15,320 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:33:15,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:33:15,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1061942752, now seen corresponding path program 1 times [2024-11-09 04:33:15,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:33:15,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799254844] [2024-11-09 04:33:15,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:33:15,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:33:15,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:33:15,513 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-09 04:33:15,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:33:15,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799254844] [2024-11-09 04:33:15,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799254844] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:33:15,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726360295] [2024-11-09 04:33:15,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:33:15,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:33:15,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:33:15,517 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:33:15,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 04:33:15,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:33:15,690 INFO L255 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 04:33:15,693 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:33:15,745 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 04:33:15,745 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:33:15,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726360295] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:33:15,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:33:15,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-09 04:33:15,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528102509] [2024-11-09 04:33:15,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:33:15,747 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:33:15,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:33:15,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:33:15,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:33:15,748 INFO L87 Difference]: Start difference. First operand 4522 states and 6242 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 04:33:16,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:33:16,536 INFO L93 Difference]: Finished difference Result 7661 states and 10771 transitions. [2024-11-09 04:33:16,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:33:16,537 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 123 [2024-11-09 04:33:16,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:33:16,562 INFO L225 Difference]: With dead ends: 7661 [2024-11-09 04:33:16,562 INFO L226 Difference]: Without dead ends: 5407 [2024-11-09 04:33:16,574 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:33:16,575 INFO L432 NwaCegarLoop]: 210 mSDtfsCounter, 199 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:33:16,576 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 239 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:33:16,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5407 states. [2024-11-09 04:33:17,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5407 to 5407. [2024-11-09 04:33:17,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5407 states, 4312 states have (on average 1.334647495361781) internal successors, (5755), 4349 states have internal predecessors, (5755), 647 states have call successors, (647), 427 states have call predecessors, (647), 446 states have return successors, (898), 632 states have call predecessors, (898), 646 states have call successors, (898) [2024-11-09 04:33:17,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5407 states to 5407 states and 7300 transitions. [2024-11-09 04:33:17,412 INFO L78 Accepts]: Start accepts. Automaton has 5407 states and 7300 transitions. Word has length 123 [2024-11-09 04:33:17,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:33:17,412 INFO L471 AbstractCegarLoop]: Abstraction has 5407 states and 7300 transitions. [2024-11-09 04:33:17,413 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 04:33:17,413 INFO L276 IsEmpty]: Start isEmpty. Operand 5407 states and 7300 transitions. [2024-11-09 04:33:17,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 04:33:17,430 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:33:17,430 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:33:17,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-09 04:33:17,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:33:17,631 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:33:17,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:33:17,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1656466785, now seen corresponding path program 1 times [2024-11-09 04:33:17,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:33:17,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336726717] [2024-11-09 04:33:17,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:33:17,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:33:17,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:33:17,763 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-09 04:33:17,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:33:17,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336726717] [2024-11-09 04:33:17,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336726717] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:33:17,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131919698] [2024-11-09 04:33:17,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:33:17,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:33:17,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:33:17,766 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:33:17,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 04:33:17,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:33:17,943 INFO L255 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 04:33:17,945 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:33:17,973 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 04:33:17,973 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:33:17,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131919698] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:33:17,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:33:17,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-09 04:33:17,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747101878] [2024-11-09 04:33:17,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:33:17,974 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:33:17,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:33:17,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:33:17,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:33:17,975 INFO L87 Difference]: Start difference. First operand 5407 states and 7300 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 04:33:19,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:33:19,064 INFO L93 Difference]: Finished difference Result 9496 states and 13149 transitions. [2024-11-09 04:33:19,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:33:19,065 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 123 [2024-11-09 04:33:19,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:33:19,090 INFO L225 Difference]: With dead ends: 9496 [2024-11-09 04:33:19,090 INFO L226 Difference]: Without dead ends: 6703 [2024-11-09 04:33:19,100 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:33:19,100 INFO L432 NwaCegarLoop]: 261 mSDtfsCounter, 67 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:33:19,101 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 460 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:33:19,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6703 states. [2024-11-09 04:33:19,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6703 to 6039. [2024-11-09 04:33:19,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6039 states, 4896 states have (on average 1.355187908496732) internal successors, (6635), 4933 states have internal predecessors, (6635), 671 states have call successors, (671), 451 states have call predecessors, (671), 470 states have return successors, (922), 656 states have call predecessors, (922), 670 states have call successors, (922) [2024-11-09 04:33:19,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6039 states to 6039 states and 8228 transitions. [2024-11-09 04:33:19,954 INFO L78 Accepts]: Start accepts. Automaton has 6039 states and 8228 transitions. Word has length 123 [2024-11-09 04:33:19,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:33:19,955 INFO L471 AbstractCegarLoop]: Abstraction has 6039 states and 8228 transitions. [2024-11-09 04:33:19,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 04:33:19,956 INFO L276 IsEmpty]: Start isEmpty. Operand 6039 states and 8228 transitions. [2024-11-09 04:33:19,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 04:33:19,972 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:33:19,972 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:33:19,997 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-09 04:33:20,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:33:20,173 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:33:20,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:33:20,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1637304160, now seen corresponding path program 1 times [2024-11-09 04:33:20,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:33:20,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793395297] [2024-11-09 04:33:20,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:33:20,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:33:20,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:33:20,293 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-09 04:33:20,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:33:20,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793395297] [2024-11-09 04:33:20,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793395297] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:33:20,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394322210] [2024-11-09 04:33:20,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:33:20,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:33:20,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:33:20,297 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:33:20,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 04:33:20,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:33:20,480 INFO L255 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 04:33:20,483 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:33:20,514 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 04:33:20,514 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:33:20,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394322210] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:33:20,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:33:20,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-09 04:33:20,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846105506] [2024-11-09 04:33:20,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:33:20,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:33:20,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:33:20,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:33:20,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:33:20,517 INFO L87 Difference]: Start difference. First operand 6039 states and 8228 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 04:33:21,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:33:21,652 INFO L93 Difference]: Finished difference Result 10716 states and 14950 transitions. [2024-11-09 04:33:21,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:33:21,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 123 [2024-11-09 04:33:21,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:33:21,677 INFO L225 Difference]: With dead ends: 10716 [2024-11-09 04:33:21,677 INFO L226 Difference]: Without dead ends: 7990 [2024-11-09 04:33:21,686 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:33:21,687 INFO L432 NwaCegarLoop]: 273 mSDtfsCounter, 79 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:33:21,687 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 473 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:33:21,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7990 states. [2024-11-09 04:33:22,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7990 to 7043. [2024-11-09 04:33:22,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7043 states, 5820 states have (on average 1.377147766323024) internal successors, (8015), 5857 states have internal predecessors, (8015), 711 states have call successors, (711), 491 states have call predecessors, (711), 510 states have return successors, (962), 696 states have call predecessors, (962), 710 states have call successors, (962) [2024-11-09 04:33:22,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7043 states to 7043 states and 9688 transitions. [2024-11-09 04:33:22,905 INFO L78 Accepts]: Start accepts. Automaton has 7043 states and 9688 transitions. Word has length 123 [2024-11-09 04:33:22,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:33:22,905 INFO L471 AbstractCegarLoop]: Abstraction has 7043 states and 9688 transitions. [2024-11-09 04:33:22,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 04:33:22,906 INFO L276 IsEmpty]: Start isEmpty. Operand 7043 states and 9688 transitions. [2024-11-09 04:33:22,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 04:33:22,920 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:33:22,920 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:33:22,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-09 04:33:23,121 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-09 04:33:23,121 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:33:23,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:33:23,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1395521806, now seen corresponding path program 1 times [2024-11-09 04:33:23,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:33:23,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68521894] [2024-11-09 04:33:23,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:33:23,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:33:23,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:33:23,240 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-09 04:33:23,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:33:23,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68521894] [2024-11-09 04:33:23,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68521894] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:33:23,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722344267] [2024-11-09 04:33:23,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:33:23,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:33:23,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:33:23,243 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:33:23,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 04:33:23,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:33:23,437 INFO L255 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 04:33:23,440 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:33:23,473 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 04:33:23,473 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:33:23,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722344267] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:33:23,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:33:23,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-09 04:33:23,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044370301] [2024-11-09 04:33:23,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:33:23,474 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:33:23,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:33:23,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:33:23,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:33:23,476 INFO L87 Difference]: Start difference. First operand 7043 states and 9688 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 04:33:24,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:33:24,607 INFO L93 Difference]: Finished difference Result 12804 states and 17950 transitions. [2024-11-09 04:33:24,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:33:24,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 123 [2024-11-09 04:33:24,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:33:24,635 INFO L225 Difference]: With dead ends: 12804 [2024-11-09 04:33:24,635 INFO L226 Difference]: Without dead ends: 9566 [2024-11-09 04:33:24,645 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:33:24,646 INFO L432 NwaCegarLoop]: 282 mSDtfsCounter, 85 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:33:24,646 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 482 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:33:24,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9566 states. [2024-11-09 04:33:25,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9566 to 8479. [2024-11-09 04:33:25,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8479 states, 7136 states have (on average 1.3936378923766817) internal successors, (9945), 7173 states have internal predecessors, (9945), 771 states have call successors, (771), 551 states have call predecessors, (771), 570 states have return successors, (1022), 756 states have call predecessors, (1022), 770 states have call successors, (1022) [2024-11-09 04:33:25,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8479 states to 8479 states and 11738 transitions. [2024-11-09 04:33:25,752 INFO L78 Accepts]: Start accepts. Automaton has 8479 states and 11738 transitions. Word has length 123 [2024-11-09 04:33:25,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:33:25,753 INFO L471 AbstractCegarLoop]: Abstraction has 8479 states and 11738 transitions. [2024-11-09 04:33:25,753 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 04:33:25,753 INFO L276 IsEmpty]: Start isEmpty. Operand 8479 states and 11738 transitions. [2024-11-09 04:33:25,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 04:33:25,765 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:33:25,766 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:33:25,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-09 04:33:25,966 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-09 04:33:25,966 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:33:25,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:33:25,967 INFO L85 PathProgramCache]: Analyzing trace with hash -779870380, now seen corresponding path program 1 times [2024-11-09 04:33:25,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:33:25,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711900975] [2024-11-09 04:33:25,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:33:25,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:33:25,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:33:26,080 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-09 04:33:26,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:33:26,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711900975] [2024-11-09 04:33:26,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711900975] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:33:26,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389776404] [2024-11-09 04:33:26,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:33:26,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:33:26,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:33:26,084 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:33:26,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 04:33:26,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:33:26,266 INFO L255 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 04:33:26,269 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:33:26,297 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 04:33:26,298 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:33:26,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389776404] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:33:26,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:33:26,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-09 04:33:26,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869278717] [2024-11-09 04:33:26,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:33:26,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:33:26,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:33:26,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:33:26,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:33:26,300 INFO L87 Difference]: Start difference. First operand 8479 states and 11738 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 04:33:27,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:33:27,563 INFO L93 Difference]: Finished difference Result 15396 states and 21720 transitions. [2024-11-09 04:33:27,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:33:27,564 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 123 [2024-11-09 04:33:27,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:33:27,590 INFO L225 Difference]: With dead ends: 15396 [2024-11-09 04:33:27,590 INFO L226 Difference]: Without dead ends: 11380 [2024-11-09 04:33:27,602 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:33:27,602 INFO L432 NwaCegarLoop]: 272 mSDtfsCounter, 73 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:33:27,603 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 472 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:33:27,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11380 states. [2024-11-09 04:33:29,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11380 to 10573. [2024-11-09 04:33:29,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10573 states, 9050 states have (on average 1.405524861878453) internal successors, (12720), 9087 states have internal predecessors, (12720), 861 states have call successors, (861), 641 states have call predecessors, (861), 660 states have return successors, (1112), 846 states have call predecessors, (1112), 860 states have call successors, (1112) [2024-11-09 04:33:29,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10573 states to 10573 states and 14693 transitions. [2024-11-09 04:33:29,169 INFO L78 Accepts]: Start accepts. Automaton has 10573 states and 14693 transitions. Word has length 123 [2024-11-09 04:33:29,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:33:29,169 INFO L471 AbstractCegarLoop]: Abstraction has 10573 states and 14693 transitions. [2024-11-09 04:33:29,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 04:33:29,169 INFO L276 IsEmpty]: Start isEmpty. Operand 10573 states and 14693 transitions. [2024-11-09 04:33:29,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 04:33:29,180 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:33:29,181 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:33:29,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-09 04:33:29,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-09 04:33:29,381 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:33:29,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:33:29,382 INFO L85 PathProgramCache]: Analyzing trace with hash 2075240478, now seen corresponding path program 2 times [2024-11-09 04:33:29,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:33:29,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383219124] [2024-11-09 04:33:29,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:33:29,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:33:29,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:33:29,613 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-09 04:33:29,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:33:29,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383219124] [2024-11-09 04:33:29,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383219124] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:33:29,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642680422] [2024-11-09 04:33:29,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:33:29,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:33:29,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:33:29,616 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:33:29,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 04:33:29,785 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 04:33:29,786 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:33:29,788 INFO L255 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 04:33:29,792 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:33:29,815 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-09 04:33:29,816 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:33:29,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642680422] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:33:29,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:33:29,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 04:33:29,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185546887] [2024-11-09 04:33:29,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:33:29,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:33:29,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:33:29,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:33:29,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:33:29,819 INFO L87 Difference]: Start difference. First operand 10573 states and 14693 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 04:33:31,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:33:31,456 INFO L93 Difference]: Finished difference Result 20534 states and 29104 transitions. [2024-11-09 04:33:31,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:33:31,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 123 [2024-11-09 04:33:31,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:33:31,490 INFO L225 Difference]: With dead ends: 20534 [2024-11-09 04:33:31,490 INFO L226 Difference]: Without dead ends: 13977 [2024-11-09 04:33:31,505 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:33:31,506 INFO L432 NwaCegarLoop]: 295 mSDtfsCounter, 133 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:33:31,506 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 482 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:33:31,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13977 states. [2024-11-09 04:33:33,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13977 to 13741. [2024-11-09 04:33:33,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13741 states, 11765 states have (on average 1.4026349341266469) internal successors, (16502), 11810 states have internal predecessors, (16502), 1124 states have call successors, (1124), 832 states have call predecessors, (1124), 850 states have return successors, (1570), 1100 states have call predecessors, (1570), 1123 states have call successors, (1570) [2024-11-09 04:33:33,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13741 states to 13741 states and 19196 transitions. [2024-11-09 04:33:33,171 INFO L78 Accepts]: Start accepts. Automaton has 13741 states and 19196 transitions. Word has length 123 [2024-11-09 04:33:33,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:33:33,172 INFO L471 AbstractCegarLoop]: Abstraction has 13741 states and 19196 transitions. [2024-11-09 04:33:33,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 04:33:33,172 INFO L276 IsEmpty]: Start isEmpty. Operand 13741 states and 19196 transitions. [2024-11-09 04:33:33,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 04:33:33,184 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:33:33,184 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:33:33,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-09 04:33:33,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-09 04:33:33,385 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:33:33,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:33:33,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1164055185, now seen corresponding path program 2 times [2024-11-09 04:33:33,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:33:33,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830492439] [2024-11-09 04:33:33,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:33:33,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:33:33,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:33:33,581 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-09 04:33:33,581 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:33:33,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830492439] [2024-11-09 04:33:33,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830492439] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:33:33,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606096958] [2024-11-09 04:33:33,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:33:33,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:33:33,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:33:33,585 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:33:33,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 04:33:33,767 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 04:33:33,767 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:33:33,770 INFO L255 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 04:33:33,772 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:33:33,934 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 04:33:33,934 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:33:33,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606096958] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:33:33,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:33:33,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2024-11-09 04:33:33,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042370780] [2024-11-09 04:33:33,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:33:33,935 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 04:33:33,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:33:33,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 04:33:33,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-09 04:33:33,936 INFO L87 Difference]: Start difference. First operand 13741 states and 19196 transitions. Second operand has 6 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-09 04:33:36,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:33:36,000 INFO L93 Difference]: Finished difference Result 25760 states and 36313 transitions. [2024-11-09 04:33:36,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 04:33:36,000 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 123 [2024-11-09 04:33:36,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:33:36,035 INFO L225 Difference]: With dead ends: 25760 [2024-11-09 04:33:36,035 INFO L226 Difference]: Without dead ends: 14718 [2024-11-09 04:33:36,056 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-11-09 04:33:36,056 INFO L432 NwaCegarLoop]: 125 mSDtfsCounter, 390 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:33:36,057 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 219 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 04:33:36,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14718 states. [2024-11-09 04:33:37,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14718 to 14430. [2024-11-09 04:33:37,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14430 states, 12372 states have (on average 1.3925800193986422) internal successors, (17229), 12421 states have internal predecessors, (17229), 1147 states have call successors, (1147), 883 states have call predecessors, (1147), 909 states have return successors, (1626), 1127 states have call predecessors, (1626), 1146 states have call successors, (1626) [2024-11-09 04:33:37,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14430 states to 14430 states and 20002 transitions. [2024-11-09 04:33:37,734 INFO L78 Accepts]: Start accepts. Automaton has 14430 states and 20002 transitions. Word has length 123 [2024-11-09 04:33:37,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:33:37,735 INFO L471 AbstractCegarLoop]: Abstraction has 14430 states and 20002 transitions. [2024-11-09 04:33:37,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-09 04:33:37,735 INFO L276 IsEmpty]: Start isEmpty. Operand 14430 states and 20002 transitions. [2024-11-09 04:33:37,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 04:33:37,753 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:33:37,753 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:33:37,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-09 04:33:37,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:33:37,954 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:33:37,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:33:37,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1064437797, now seen corresponding path program 2 times [2024-11-09 04:33:37,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:33:37,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452612860] [2024-11-09 04:33:37,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:33:37,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:33:37,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:33:38,153 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-09 04:33:38,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:33:38,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452612860] [2024-11-09 04:33:38,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452612860] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:33:38,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644626554] [2024-11-09 04:33:38,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:33:38,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:33:38,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:33:38,158 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:33:38,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-09 04:33:38,338 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 04:33:38,338 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:33:38,341 INFO L255 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 04:33:38,343 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:33:38,556 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-09 04:33:38,557 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:33:38,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644626554] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:33:38,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:33:38,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2024-11-09 04:33:38,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160449269] [2024-11-09 04:33:38,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:33:38,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 04:33:38,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:33:38,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 04:33:38,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-09 04:33:38,559 INFO L87 Difference]: Start difference. First operand 14430 states and 20002 transitions. Second operand has 6 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-09 04:33:40,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:33:40,710 INFO L93 Difference]: Finished difference Result 23811 states and 33529 transitions. [2024-11-09 04:33:40,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 04:33:40,710 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 123 [2024-11-09 04:33:40,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:33:40,749 INFO L225 Difference]: With dead ends: 23811 [2024-11-09 04:33:40,749 INFO L226 Difference]: Without dead ends: 15162 [2024-11-09 04:33:40,761 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-11-09 04:33:40,762 INFO L432 NwaCegarLoop]: 125 mSDtfsCounter, 286 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:33:40,762 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 405 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 04:33:40,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15162 states. [2024-11-09 04:33:42,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15162 to 15036. [2024-11-09 04:33:42,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15036 states, 12914 states have (on average 1.380130091373703) internal successors, (17823), 12963 states have internal predecessors, (17823), 1165 states have call successors, (1165), 929 states have call predecessors, (1165), 955 states have return successors, (1662), 1145 states have call predecessors, (1662), 1164 states have call successors, (1662) [2024-11-09 04:33:42,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15036 states to 15036 states and 20650 transitions. [2024-11-09 04:33:42,542 INFO L78 Accepts]: Start accepts. Automaton has 15036 states and 20650 transitions. Word has length 123 [2024-11-09 04:33:42,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:33:42,543 INFO L471 AbstractCegarLoop]: Abstraction has 15036 states and 20650 transitions. [2024-11-09 04:33:42,543 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-09 04:33:42,543 INFO L276 IsEmpty]: Start isEmpty. Operand 15036 states and 20650 transitions. [2024-11-09 04:33:42,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 04:33:42,561 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:33:42,562 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:33:42,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-09 04:33:42,763 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:33:42,763 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:33:42,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:33:42,763 INFO L85 PathProgramCache]: Analyzing trace with hash -610619387, now seen corresponding path program 1 times [2024-11-09 04:33:42,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:33:42,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179949199] [2024-11-09 04:33:42,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:33:42,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:33:42,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:33:43,052 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-09 04:33:43,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:33:43,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179949199] [2024-11-09 04:33:43,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179949199] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:33:43,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546780455] [2024-11-09 04:33:43,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:33:43,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:33:43,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:33:43,056 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:33:43,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-09 04:33:43,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:33:43,243 INFO L255 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 04:33:43,245 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:33:43,297 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 04:33:43,297 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:33:43,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546780455] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:33:43,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:33:43,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 04:33:43,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119168950] [2024-11-09 04:33:43,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:33:43,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:33:43,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:33:43,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:33:43,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:33:43,299 INFO L87 Difference]: Start difference. First operand 15036 states and 20650 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 04:33:45,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:33:45,001 INFO L93 Difference]: Finished difference Result 24025 states and 33641 transitions. [2024-11-09 04:33:45,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:33:45,001 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 123 [2024-11-09 04:33:45,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:33:45,156 INFO L225 Difference]: With dead ends: 24025 [2024-11-09 04:33:45,156 INFO L226 Difference]: Without dead ends: 15066 [2024-11-09 04:33:45,169 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:33:45,169 INFO L432 NwaCegarLoop]: 301 mSDtfsCounter, 107 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:33:45,170 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 487 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:33:45,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15066 states. [2024-11-09 04:33:46,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15066 to 14858. [2024-11-09 04:33:46,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14858 states, 12736 states have (on average 1.3590609296482412) internal successors, (17309), 12785 states have internal predecessors, (17309), 1165 states have call successors, (1165), 929 states have call predecessors, (1165), 955 states have return successors, (1662), 1145 states have call predecessors, (1662), 1164 states have call successors, (1662) [2024-11-09 04:33:46,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14858 states to 14858 states and 20136 transitions. [2024-11-09 04:33:46,835 INFO L78 Accepts]: Start accepts. Automaton has 14858 states and 20136 transitions. Word has length 123 [2024-11-09 04:33:46,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:33:46,835 INFO L471 AbstractCegarLoop]: Abstraction has 14858 states and 20136 transitions. [2024-11-09 04:33:46,836 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 04:33:46,836 INFO L276 IsEmpty]: Start isEmpty. Operand 14858 states and 20136 transitions. [2024-11-09 04:33:46,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-09 04:33:46,848 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:33:46,848 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:33:46,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-09 04:33:47,048 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:33:47,049 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:33:47,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:33:47,049 INFO L85 PathProgramCache]: Analyzing trace with hash -353166255, now seen corresponding path program 1 times [2024-11-09 04:33:47,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:33:47,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34438322] [2024-11-09 04:33:47,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:33:47,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:33:47,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:33:47,254 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-09 04:33:47,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:33:47,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34438322] [2024-11-09 04:33:47,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34438322] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:33:47,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476983549] [2024-11-09 04:33:47,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:33:47,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:33:47,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:33:47,257 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:33:47,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-09 04:33:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:33:47,443 INFO L255 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 04:33:47,446 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:33:47,480 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-09 04:33:47,480 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:33:47,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476983549] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:33:47,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:33:47,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 04:33:47,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503133371] [2024-11-09 04:33:47,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:33:47,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:33:47,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:33:47,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:33:47,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:33:47,483 INFO L87 Difference]: Start difference. First operand 14858 states and 20136 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 04:33:50,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:33:50,534 INFO L93 Difference]: Finished difference Result 35842 states and 49408 transitions. [2024-11-09 04:33:50,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:33:50,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 124 [2024-11-09 04:33:50,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:33:50,585 INFO L225 Difference]: With dead ends: 35842 [2024-11-09 04:33:50,585 INFO L226 Difference]: Without dead ends: 21700 [2024-11-09 04:33:50,608 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:33:50,608 INFO L432 NwaCegarLoop]: 210 mSDtfsCounter, 64 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:33:50,608 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 394 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:33:50,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21700 states. [2024-11-09 04:33:52,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21700 to 17944. [2024-11-09 04:33:52,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17944 states, 15548 states have (on average 1.3740030872137896) internal successors, (21363), 15598 states have internal predecessors, (21363), 1302 states have call successors, (1302), 1066 states have call predecessors, (1302), 1092 states have return successors, (1799), 1281 states have call predecessors, (1799), 1301 states have call successors, (1799) [2024-11-09 04:33:52,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17944 states to 17944 states and 24464 transitions. [2024-11-09 04:33:52,715 INFO L78 Accepts]: Start accepts. Automaton has 17944 states and 24464 transitions. Word has length 124 [2024-11-09 04:33:52,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:33:52,716 INFO L471 AbstractCegarLoop]: Abstraction has 17944 states and 24464 transitions. [2024-11-09 04:33:52,716 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 04:33:52,716 INFO L276 IsEmpty]: Start isEmpty. Operand 17944 states and 24464 transitions. [2024-11-09 04:33:52,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-11-09 04:33:52,740 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:33:52,740 INFO L215 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2024-11-09 04:33:52,763 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-09 04:33:52,940 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:33:52,941 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:33:52,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:33:52,941 INFO L85 PathProgramCache]: Analyzing trace with hash -587551896, now seen corresponding path program 1 times [2024-11-09 04:33:52,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:33:52,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392554055] [2024-11-09 04:33:52,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:33:52,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:33:52,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:33:53,312 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 12 proven. 34 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2024-11-09 04:33:53,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:33:53,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392554055] [2024-11-09 04:33:53,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392554055] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:33:53,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877600947] [2024-11-09 04:33:53,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:33:53,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:33:53,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:33:53,316 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:33:53,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-09 04:33:53,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:33:53,513 INFO L255 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 04:33:53,516 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:33:53,623 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 04:33:53,623 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:33:53,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877600947] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:33:53,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:33:53,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-09 04:33:53,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492635119] [2024-11-09 04:33:53,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:33:53,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 04:33:53,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:33:53,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 04:33:53,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-09 04:33:53,625 INFO L87 Difference]: Start difference. First operand 17944 states and 24464 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 2 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2024-11-09 04:33:56,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:33:56,925 INFO L93 Difference]: Finished difference Result 38497 states and 52392 transitions. [2024-11-09 04:33:56,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 04:33:56,925 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 2 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 129 [2024-11-09 04:33:56,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:33:56,970 INFO L225 Difference]: With dead ends: 38497 [2024-11-09 04:33:56,970 INFO L226 Difference]: Without dead ends: 18535 [2024-11-09 04:33:56,992 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-09 04:33:56,993 INFO L432 NwaCegarLoop]: 244 mSDtfsCounter, 124 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:33:56,993 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 714 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 04:33:57,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18535 states. [2024-11-09 04:33:58,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18535 to 17492. [2024-11-09 04:33:58,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17492 states, 15066 states have (on average 1.3545068365856896) internal successors, (20407), 15136 states have internal predecessors, (20407), 1303 states have call successors, (1303), 1063 states have call predecessors, (1303), 1121 states have return successors, (1706), 1294 states have call predecessors, (1706), 1302 states have call successors, (1706) [2024-11-09 04:33:58,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17492 states to 17492 states and 23416 transitions. [2024-11-09 04:33:58,963 INFO L78 Accepts]: Start accepts. Automaton has 17492 states and 23416 transitions. Word has length 129 [2024-11-09 04:33:58,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:33:58,963 INFO L471 AbstractCegarLoop]: Abstraction has 17492 states and 23416 transitions. [2024-11-09 04:33:58,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 2 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2024-11-09 04:33:58,963 INFO L276 IsEmpty]: Start isEmpty. Operand 17492 states and 23416 transitions. [2024-11-09 04:33:58,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2024-11-09 04:33:58,974 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:33:58,974 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:33:58,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-09 04:33:59,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:33:59,175 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:33:59,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:33:59,175 INFO L85 PathProgramCache]: Analyzing trace with hash -2107866453, now seen corresponding path program 1 times [2024-11-09 04:33:59,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:33:59,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416825060] [2024-11-09 04:33:59,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:33:59,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:33:59,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:33:59,363 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 14 proven. 33 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-09 04:33:59,364 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:33:59,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416825060] [2024-11-09 04:33:59,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416825060] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:33:59,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464811218] [2024-11-09 04:33:59,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:33:59,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:33:59,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:33:59,372 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:33:59,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-09 04:33:59,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:33:59,540 INFO L255 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 04:33:59,542 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:33:59,623 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:33:59,623 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:33:59,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464811218] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:33:59,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:33:59,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-09 04:33:59,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123621982] [2024-11-09 04:33:59,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:33:59,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 04:33:59,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:33:59,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 04:33:59,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-09 04:33:59,625 INFO L87 Difference]: Start difference. First operand 17492 states and 23416 transitions. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 4 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-09 04:34:02,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:34:02,880 INFO L93 Difference]: Finished difference Result 32249 states and 43576 transitions. [2024-11-09 04:34:02,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 04:34:02,880 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 4 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 127 [2024-11-09 04:34:02,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:34:02,927 INFO L225 Difference]: With dead ends: 32249 [2024-11-09 04:34:02,927 INFO L226 Difference]: Without dead ends: 18805 [2024-11-09 04:34:02,943 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-09 04:34:02,944 INFO L432 NwaCegarLoop]: 260 mSDtfsCounter, 136 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:34:02,944 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 595 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 04:34:02,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18805 states. [2024-11-09 04:34:04,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18805 to 15813. [2024-11-09 04:34:04,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15813 states, 13409 states have (on average 1.3369378775449325) internal successors, (17927), 13493 states have internal predecessors, (17927), 1298 states have call successors, (1298), 1026 states have call predecessors, (1298), 1104 states have return successors, (1809), 1295 states have call predecessors, (1809), 1297 states have call successors, (1809) [2024-11-09 04:34:04,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15813 states to 15813 states and 21034 transitions. [2024-11-09 04:34:04,888 INFO L78 Accepts]: Start accepts. Automaton has 15813 states and 21034 transitions. Word has length 127 [2024-11-09 04:34:04,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:34:04,889 INFO L471 AbstractCegarLoop]: Abstraction has 15813 states and 21034 transitions. [2024-11-09 04:34:04,889 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 4 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-09 04:34:04,889 INFO L276 IsEmpty]: Start isEmpty. Operand 15813 states and 21034 transitions. [2024-11-09 04:34:04,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-11-09 04:34:04,900 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:34:04,900 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:34:04,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-09 04:34:05,100 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:34:05,101 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:34:05,101 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:34:05,101 INFO L85 PathProgramCache]: Analyzing trace with hash -522103309, now seen corresponding path program 1 times [2024-11-09 04:34:05,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:34:05,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568679512] [2024-11-09 04:34:05,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:34:05,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:34:05,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:34:05,316 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-09 04:34:05,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:34:05,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568679512] [2024-11-09 04:34:05,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568679512] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:34:05,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049472186] [2024-11-09 04:34:05,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:34:05,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:34:05,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:34:05,319 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:34:05,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-09 04:34:05,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:34:05,499 INFO L255 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 04:34:05,502 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:34:05,590 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-09 04:34:05,590 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:34:05,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049472186] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:34:05,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:34:05,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 04:34:05,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783902222] [2024-11-09 04:34:05,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:34:05,591 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:34:05,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:34:05,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:34:05,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:34:05,593 INFO L87 Difference]: Start difference. First operand 15813 states and 21034 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 04:34:08,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:34:08,126 INFO L93 Difference]: Finished difference Result 29976 states and 40672 transitions. [2024-11-09 04:34:08,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:34:08,127 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 159 [2024-11-09 04:34:08,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:34:08,172 INFO L225 Difference]: With dead ends: 29976 [2024-11-09 04:34:08,172 INFO L226 Difference]: Without dead ends: 17277 [2024-11-09 04:34:08,189 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:34:08,190 INFO L432 NwaCegarLoop]: 214 mSDtfsCounter, 182 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:34:08,190 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 248 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:34:08,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17277 states. [2024-11-09 04:34:10,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17277 to 17125. [2024-11-09 04:34:10,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17125 states, 14633 states have (on average 1.311077701086585) internal successors, (19185), 14717 states have internal predecessors, (19185), 1310 states have call successors, (1310), 1102 states have call predecessors, (1310), 1180 states have return successors, (1971), 1307 states have call predecessors, (1971), 1309 states have call successors, (1971) [2024-11-09 04:34:10,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17125 states to 17125 states and 22466 transitions. [2024-11-09 04:34:10,575 INFO L78 Accepts]: Start accepts. Automaton has 17125 states and 22466 transitions. Word has length 159 [2024-11-09 04:34:10,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:34:10,576 INFO L471 AbstractCegarLoop]: Abstraction has 17125 states and 22466 transitions. [2024-11-09 04:34:10,576 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 04:34:10,576 INFO L276 IsEmpty]: Start isEmpty. Operand 17125 states and 22466 transitions. [2024-11-09 04:34:10,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-11-09 04:34:10,586 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:34:10,587 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:34:10,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-09 04:34:10,787 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-09 04:34:10,787 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:34:10,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:34:10,788 INFO L85 PathProgramCache]: Analyzing trace with hash 224294838, now seen corresponding path program 1 times [2024-11-09 04:34:10,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:34:10,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659361334] [2024-11-09 04:34:10,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:34:10,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:34:10,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:34:11,024 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-09 04:34:11,025 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:34:11,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659361334] [2024-11-09 04:34:11,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659361334] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:34:11,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955630510] [2024-11-09 04:34:11,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:34:11,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:34:11,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:34:11,028 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:34:11,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-09 04:34:11,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:34:11,253 INFO L255 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 04:34:11,260 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:34:11,316 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-09 04:34:11,317 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:34:11,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955630510] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:34:11,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:34:11,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 04:34:11,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5921876] [2024-11-09 04:34:11,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:34:11,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:34:11,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:34:11,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:34:11,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:34:11,319 INFO L87 Difference]: Start difference. First operand 17125 states and 22466 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-09 04:34:13,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:34:13,958 INFO L93 Difference]: Finished difference Result 30642 states and 41416 transitions. [2024-11-09 04:34:13,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:34:13,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 159 [2024-11-09 04:34:13,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:34:14,025 INFO L225 Difference]: With dead ends: 30642 [2024-11-09 04:34:14,025 INFO L226 Difference]: Without dead ends: 16947 [2024-11-09 04:34:14,051 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:34:14,052 INFO L432 NwaCegarLoop]: 279 mSDtfsCounter, 105 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:34:14,053 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 457 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:34:14,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16947 states. [2024-11-09 04:34:16,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16947 to 16709. [2024-11-09 04:34:16,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16709 states, 14217 states have (on average 1.2833227825842302) internal successors, (18245), 14301 states have internal predecessors, (18245), 1310 states have call successors, (1310), 1102 states have call predecessors, (1310), 1180 states have return successors, (1971), 1307 states have call predecessors, (1971), 1309 states have call successors, (1971) [2024-11-09 04:34:16,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16709 states to 16709 states and 21526 transitions. [2024-11-09 04:34:16,537 INFO L78 Accepts]: Start accepts. Automaton has 16709 states and 21526 transitions. Word has length 159 [2024-11-09 04:34:16,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:34:16,538 INFO L471 AbstractCegarLoop]: Abstraction has 16709 states and 21526 transitions. [2024-11-09 04:34:16,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-09 04:34:16,538 INFO L276 IsEmpty]: Start isEmpty. Operand 16709 states and 21526 transitions. [2024-11-09 04:34:16,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2024-11-09 04:34:16,549 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:34:16,549 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:34:16,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-09 04:34:16,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-09 04:34:16,750 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:34:16,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:34:16,750 INFO L85 PathProgramCache]: Analyzing trace with hash 369065772, now seen corresponding path program 1 times [2024-11-09 04:34:16,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:34:16,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869911694] [2024-11-09 04:34:16,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:34:16,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:34:16,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:34:16,968 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2024-11-09 04:34:16,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:34:16,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869911694] [2024-11-09 04:34:16,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869911694] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:34:16,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421936332] [2024-11-09 04:34:16,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:34:16,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:34:16,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:34:16,972 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:34:16,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-09 04:34:17,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:34:17,170 INFO L255 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 04:34:17,173 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:34:17,268 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-09 04:34:17,268 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:34:17,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421936332] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:34:17,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:34:17,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-09 04:34:17,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826905648] [2024-11-09 04:34:17,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:34:17,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 04:34:17,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:34:17,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 04:34:17,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-09 04:34:17,270 INFO L87 Difference]: Start difference. First operand 16709 states and 21526 transitions. Second operand has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 4 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-09 04:34:21,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:34:21,158 INFO L93 Difference]: Finished difference Result 37967 states and 49318 transitions. [2024-11-09 04:34:21,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 04:34:21,159 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 4 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 162 [2024-11-09 04:34:21,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:34:21,222 INFO L225 Difference]: With dead ends: 37967 [2024-11-09 04:34:21,222 INFO L226 Difference]: Without dead ends: 24764 [2024-11-09 04:34:21,238 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-09 04:34:21,239 INFO L432 NwaCegarLoop]: 257 mSDtfsCounter, 132 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:34:21,239 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 596 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 04:34:21,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24764 states. [2024-11-09 04:34:24,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24764 to 21954. [2024-11-09 04:34:24,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21954 states, 18482 states have (on average 1.2560328968726329) internal successors, (23214), 18560 states have internal predecessors, (23214), 1878 states have call successors, (1878), 1534 states have call predecessors, (1878), 1592 states have return successors, (2987), 1861 states have call predecessors, (2987), 1877 states have call successors, (2987) [2024-11-09 04:34:24,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21954 states to 21954 states and 28079 transitions. [2024-11-09 04:34:24,554 INFO L78 Accepts]: Start accepts. Automaton has 21954 states and 28079 transitions. Word has length 162 [2024-11-09 04:34:24,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:34:24,554 INFO L471 AbstractCegarLoop]: Abstraction has 21954 states and 28079 transitions. [2024-11-09 04:34:24,554 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 4 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-09 04:34:24,555 INFO L276 IsEmpty]: Start isEmpty. Operand 21954 states and 28079 transitions. [2024-11-09 04:34:24,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2024-11-09 04:34:24,569 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:34:24,569 INFO L215 NwaCegarLoop]: trace histogram [10, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:34:24,586 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-09 04:34:24,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-09 04:34:24,770 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:34:24,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:34:24,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1167632200, now seen corresponding path program 1 times [2024-11-09 04:34:24,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:34:24,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202647339] [2024-11-09 04:34:24,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:34:24,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:34:24,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:34:25,494 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 115 proven. 55 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2024-11-09 04:34:25,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:34:25,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202647339] [2024-11-09 04:34:25,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202647339] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:34:25,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662943978] [2024-11-09 04:34:25,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:34:25,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:34:25,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:34:25,496 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:34:25,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-09 04:34:25,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:34:25,683 INFO L255 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-09 04:34:25,688 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:34:26,590 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 236 proven. 126 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 04:34:26,590 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:34:28,925 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 165 proven. 18 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-11-09 04:34:28,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662943978] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:34:28,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2064154412] [2024-11-09 04:34:28,928 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2024-11-09 04:34:28,929 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:34:28,929 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:34:28,929 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:34:28,930 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:35:11,095 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 173 for LOIs [2024-11-09 04:35:11,241 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 17 for LOIs [2024-11-09 04:35:11,243 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 8 for LOIs [2024-11-09 04:35:11,246 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 146 for LOIs [2024-11-09 04:35:11,931 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 147 for LOIs [2024-11-09 04:35:12,454 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 22 for LOIs [2024-11-09 04:35:12,513 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 140 for LOIs [2024-11-09 04:35:12,715 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 151 for LOIs [2024-11-09 04:35:12,895 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:35:27,271 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '886050#(and (= ~q_req_up~0 1) (= ~q_free~0 1) (= ~c_dr_pc~0 1) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~p_last_write~0) (= ~c_dr_st~0 1))' at error location [2024-11-09 04:35:27,271 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:35:27,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:35:27,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 14] total 47 [2024-11-09 04:35:27,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530756886] [2024-11-09 04:35:27,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:35:27,273 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-09 04:35:27,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:35:27,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-09 04:35:27,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=584, Invalid=8158, Unknown=0, NotChecked=0, Total=8742 [2024-11-09 04:35:27,275 INFO L87 Difference]: Start difference. First operand 21954 states and 28079 transitions. Second operand has 47 states, 35 states have (on average 6.828571428571428) internal successors, (239), 38 states have internal predecessors, (239), 18 states have call successors, (72), 18 states have call predecessors, (72), 27 states have return successors, (74), 21 states have call predecessors, (74), 18 states have call successors, (74) [2024-11-09 04:35:38,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:35:38,620 INFO L93 Difference]: Finished difference Result 22269 states and 28431 transitions. [2024-11-09 04:35:38,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2024-11-09 04:35:38,621 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 35 states have (on average 6.828571428571428) internal successors, (239), 38 states have internal predecessors, (239), 18 states have call successors, (72), 18 states have call predecessors, (72), 27 states have return successors, (74), 21 states have call predecessors, (74), 18 states have call successors, (74) Word has length 220 [2024-11-09 04:35:38,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:35:38,685 INFO L225 Difference]: With dead ends: 22269 [2024-11-09 04:35:38,685 INFO L226 Difference]: Without dead ends: 21245 [2024-11-09 04:35:38,694 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 786 GetRequests, 582 SyntacticMatches, 23 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 13127 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=2840, Invalid=30466, Unknown=0, NotChecked=0, Total=33306 [2024-11-09 04:35:38,695 INFO L432 NwaCegarLoop]: 175 mSDtfsCounter, 2258 mSDsluCounter, 3196 mSDsCounter, 0 mSdLazyCounter, 5280 mSolverCounterSat, 1152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2258 SdHoareTripleChecker+Valid, 3371 SdHoareTripleChecker+Invalid, 6432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1152 IncrementalHoareTripleChecker+Valid, 5280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:35:38,695 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2258 Valid, 3371 Invalid, 6432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1152 Valid, 5280 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-11-09 04:35:38,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21245 states. [2024-11-09 04:35:41,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21245 to 21245. [2024-11-09 04:35:41,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21245 states, 18000 states have (on average 1.2600555555555555) internal successors, (22681), 18066 states have internal predecessors, (22681), 1764 states have call successors, (1764), 1440 states have call predecessors, (1764), 1480 states have return successors, (2844), 1739 states have call predecessors, (2844), 1764 states have call successors, (2844) [2024-11-09 04:35:41,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21245 states to 21245 states and 27289 transitions. [2024-11-09 04:35:41,808 INFO L78 Accepts]: Start accepts. Automaton has 21245 states and 27289 transitions. Word has length 220 [2024-11-09 04:35:41,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:35:41,809 INFO L471 AbstractCegarLoop]: Abstraction has 21245 states and 27289 transitions. [2024-11-09 04:35:41,809 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 35 states have (on average 6.828571428571428) internal successors, (239), 38 states have internal predecessors, (239), 18 states have call successors, (72), 18 states have call predecessors, (72), 27 states have return successors, (74), 21 states have call predecessors, (74), 18 states have call successors, (74) [2024-11-09 04:35:41,809 INFO L276 IsEmpty]: Start isEmpty. Operand 21245 states and 27289 transitions. [2024-11-09 04:35:41,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2024-11-09 04:35:41,830 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:35:41,831 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:35:41,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-09 04:35:42,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-09 04:35:42,032 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:35:42,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:35:42,033 INFO L85 PathProgramCache]: Analyzing trace with hash -406230657, now seen corresponding path program 1 times [2024-11-09 04:35:42,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:35:42,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302951435] [2024-11-09 04:35:42,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:35:42,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:35:42,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:35:42,299 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 14 proven. 65 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2024-11-09 04:35:42,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:35:42,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302951435] [2024-11-09 04:35:42,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302951435] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:35:42,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211309153] [2024-11-09 04:35:42,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:35:42,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:35:42,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:35:42,303 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:35:42,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-09 04:35:42,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:35:42,536 INFO L255 TraceCheckSpWp]: Trace formula consists of 805 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 04:35:42,540 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:35:42,597 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-09 04:35:42,597 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:35:42,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211309153] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:35:42,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:35:42,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 04:35:42,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762874178] [2024-11-09 04:35:42,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:35:42,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:35:42,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:35:42,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:35:42,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:35:42,600 INFO L87 Difference]: Start difference. First operand 21245 states and 27289 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-11-09 04:35:45,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:35:45,864 INFO L93 Difference]: Finished difference Result 33492 states and 44515 transitions. [2024-11-09 04:35:45,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:35:45,865 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 195 [2024-11-09 04:35:45,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:35:45,959 INFO L225 Difference]: With dead ends: 33492 [2024-11-09 04:35:45,960 INFO L226 Difference]: Without dead ends: 21303 [2024-11-09 04:35:45,991 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:35:45,992 INFO L432 NwaCegarLoop]: 226 mSDtfsCounter, 103 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:35:45,992 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 340 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:35:46,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21303 states. [2024-11-09 04:35:49,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21303 to 21109. [2024-11-09 04:35:49,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21109 states, 17864 states have (on average 1.2368450515002238) internal successors, (22095), 17930 states have internal predecessors, (22095), 1764 states have call successors, (1764), 1440 states have call predecessors, (1764), 1480 states have return successors, (2844), 1739 states have call predecessors, (2844), 1764 states have call successors, (2844) [2024-11-09 04:35:49,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21109 states to 21109 states and 26703 transitions. [2024-11-09 04:35:49,311 INFO L78 Accepts]: Start accepts. Automaton has 21109 states and 26703 transitions. Word has length 195 [2024-11-09 04:35:49,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:35:49,312 INFO L471 AbstractCegarLoop]: Abstraction has 21109 states and 26703 transitions. [2024-11-09 04:35:49,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-11-09 04:35:49,312 INFO L276 IsEmpty]: Start isEmpty. Operand 21109 states and 26703 transitions. [2024-11-09 04:35:49,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2024-11-09 04:35:49,332 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:35:49,333 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:35:49,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-09 04:35:49,533 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-09 04:35:49,534 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:35:49,534 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:35:49,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1733186209, now seen corresponding path program 1 times [2024-11-09 04:35:49,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:35:49,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554141503] [2024-11-09 04:35:49,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:35:49,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:35:49,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:35:49,765 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 14 proven. 61 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2024-11-09 04:35:49,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:35:49,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554141503] [2024-11-09 04:35:49,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554141503] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:35:49,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685273283] [2024-11-09 04:35:49,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:35:49,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:35:49,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:35:49,768 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:35:49,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-09 04:35:49,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:35:49,970 INFO L255 TraceCheckSpWp]: Trace formula consists of 817 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 04:35:49,973 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:35:50,036 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-09 04:35:50,037 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:35:50,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685273283] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:35:50,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:35:50,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 04:35:50,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531350463] [2024-11-09 04:35:50,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:35:50,038 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:35:50,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:35:50,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:35:50,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:35:50,038 INFO L87 Difference]: Start difference. First operand 21109 states and 26703 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-09 04:35:53,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:35:53,112 INFO L93 Difference]: Finished difference Result 35350 states and 45538 transitions. [2024-11-09 04:35:53,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:35:53,113 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 195 [2024-11-09 04:35:53,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:35:53,178 INFO L225 Difference]: With dead ends: 35350 [2024-11-09 04:35:53,179 INFO L226 Difference]: Without dead ends: 23433 [2024-11-09 04:35:53,200 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:35:53,201 INFO L432 NwaCegarLoop]: 141 mSDtfsCounter, 94 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:35:53,201 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 175 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 04:35:53,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23433 states. [2024-11-09 04:35:56,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23433 to 23293. [2024-11-09 04:35:56,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23293 states, 19896 states have (on average 1.2107458785685565) internal successors, (24089), 20002 states have internal predecessors, (24089), 1764 states have call successors, (1764), 1536 states have call predecessors, (1764), 1632 states have return successors, (3064), 1755 states have call predecessors, (3064), 1764 states have call successors, (3064) [2024-11-09 04:35:56,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23293 states to 23293 states and 28917 transitions. [2024-11-09 04:35:56,334 INFO L78 Accepts]: Start accepts. Automaton has 23293 states and 28917 transitions. Word has length 195 [2024-11-09 04:35:56,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:35:56,334 INFO L471 AbstractCegarLoop]: Abstraction has 23293 states and 28917 transitions. [2024-11-09 04:35:56,334 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-09 04:35:56,335 INFO L276 IsEmpty]: Start isEmpty. Operand 23293 states and 28917 transitions. [2024-11-09 04:35:56,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2024-11-09 04:35:56,349 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:35:56,350 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:35:56,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-11-09 04:35:56,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:35:56,550 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:35:56,550 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:35:56,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1287635141, now seen corresponding path program 1 times [2024-11-09 04:35:56,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:35:56,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997269868] [2024-11-09 04:35:56,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:35:56,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:35:56,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:35:56,763 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 14 proven. 65 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2024-11-09 04:35:56,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:35:56,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997269868] [2024-11-09 04:35:56,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997269868] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:35:56,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014096745] [2024-11-09 04:35:56,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:35:56,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:35:56,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:35:56,766 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:35:56,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-09 04:35:56,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:35:56,963 INFO L255 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 04:35:56,966 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:35:57,047 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 173 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-09 04:35:57,047 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:35:57,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014096745] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:35:57,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:35:57,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-09 04:35:57,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233223389] [2024-11-09 04:35:57,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:35:57,048 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 04:35:57,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:35:57,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 04:35:57,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-09 04:35:57,049 INFO L87 Difference]: Start difference. First operand 23293 states and 28917 transitions. Second operand has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2024-11-09 04:36:01,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:36:01,518 INFO L93 Difference]: Finished difference Result 45891 states and 57337 transitions. [2024-11-09 04:36:01,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 04:36:01,519 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 199 [2024-11-09 04:36:01,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:36:01,605 INFO L225 Difference]: With dead ends: 45891 [2024-11-09 04:36:01,605 INFO L226 Difference]: Without dead ends: 32412 [2024-11-09 04:36:01,626 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-09 04:36:01,626 INFO L432 NwaCegarLoop]: 199 mSDtfsCounter, 105 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:36:01,626 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 565 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:36:01,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32412 states. [2024-11-09 04:36:05,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32412 to 30267. [2024-11-09 04:36:06,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30267 states, 25686 states have (on average 1.1895585143658023) internal successors, (30555), 25804 states have internal predecessors, (30555), 2412 states have call successors, (2412), 2072 states have call predecessors, (2412), 2168 states have return successors, (4360), 2391 states have call predecessors, (4360), 2412 states have call successors, (4360) [2024-11-09 04:36:06,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30267 states to 30267 states and 37327 transitions. [2024-11-09 04:36:06,097 INFO L78 Accepts]: Start accepts. Automaton has 30267 states and 37327 transitions. Word has length 199 [2024-11-09 04:36:06,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:36:06,097 INFO L471 AbstractCegarLoop]: Abstraction has 30267 states and 37327 transitions. [2024-11-09 04:36:06,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2024-11-09 04:36:06,098 INFO L276 IsEmpty]: Start isEmpty. Operand 30267 states and 37327 transitions. [2024-11-09 04:36:06,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2024-11-09 04:36:06,117 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:36:06,118 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:36:06,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-09 04:36:06,318 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-11-09 04:36:06,318 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:36:06,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:36:06,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1320555257, now seen corresponding path program 1 times [2024-11-09 04:36:06,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:36:06,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000281504] [2024-11-09 04:36:06,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:36:06,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:36:06,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:36:06,669 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 18 proven. 102 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2024-11-09 04:36:06,670 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:36:06,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000281504] [2024-11-09 04:36:06,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000281504] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:36:06,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105907219] [2024-11-09 04:36:06,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:36:06,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:36:06,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:36:06,672 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:36:06,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-09 04:36:06,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:36:06,922 INFO L255 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-09 04:36:06,928 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:36:07,146 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 156 proven. 2 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2024-11-09 04:36:07,147 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:36:07,597 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 51 proven. 19 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2024-11-09 04:36:07,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105907219] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:36:07,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [967131154] [2024-11-09 04:36:07,600 INFO L159 IcfgInterpreter]: Started Sifa with 86 locations of interest [2024-11-09 04:36:07,600 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:36:07,600 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:36:07,600 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:36:07,601 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:36:30,943 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 167 for LOIs [2024-11-09 04:36:31,081 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 6 for LOIs [2024-11-09 04:36:31,090 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 127 for LOIs [2024-11-09 04:36:31,171 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 6 for LOIs [2024-11-09 04:36:31,212 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 6 for LOIs [2024-11-09 04:36:31,326 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 158 for LOIs [2024-11-09 04:36:31,473 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:36:42,102 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1181503#(and (not (= ~token~0 (+ ~local~0 4))) (= ~m_pc~0 1) (<= ~t4_pc~0 1) (= ~m_st~0 1) (exists ((|v_ULTIMATE.start_eval2_~tmp_ndt_1~0#1_31| Int)) (and (not (= |v_ULTIMATE.start_eval2_~tmp_ndt_1~0#1_31| 0)) (<= |v_ULTIMATE.start_eval2_~tmp_ndt_1~0#1_31| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval2_~tmp_ndt_1~0#1_31| 2147483648)))) (<= 0 ~t4_pc~0))' at error location [2024-11-09 04:36:42,103 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:36:42,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:36:42,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 12] total 21 [2024-11-09 04:36:42,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710384846] [2024-11-09 04:36:42,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:36:42,104 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 04:36:42,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:36:42,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 04:36:42,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=5313, Unknown=0, NotChecked=0, Total=5700 [2024-11-09 04:36:42,106 INFO L87 Difference]: Start difference. First operand 30267 states and 37327 transitions. Second operand has 21 states, 15 states have (on average 15.066666666666666) internal successors, (226), 17 states have internal predecessors, (226), 11 states have call successors, (44), 8 states have call predecessors, (44), 12 states have return successors, (45), 11 states have call predecessors, (45), 11 states have call successors, (45) [2024-11-09 04:36:50,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:36:50,997 INFO L93 Difference]: Finished difference Result 67766 states and 83003 transitions. [2024-11-09 04:36:50,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-09 04:36:50,998 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 15 states have (on average 15.066666666666666) internal successors, (226), 17 states have internal predecessors, (226), 11 states have call successors, (44), 8 states have call predecessors, (44), 12 states have return successors, (45), 11 states have call predecessors, (45), 11 states have call successors, (45) Word has length 207 [2024-11-09 04:36:50,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:36:51,096 INFO L225 Difference]: With dead ends: 67766 [2024-11-09 04:36:51,096 INFO L226 Difference]: Without dead ends: 37506 [2024-11-09 04:36:51,134 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 687 GetRequests, 546 SyntacticMatches, 28 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 6187 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=1177, Invalid=11933, Unknown=0, NotChecked=0, Total=13110 [2024-11-09 04:36:51,135 INFO L432 NwaCegarLoop]: 96 mSDtfsCounter, 2166 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 1710 mSolverCounterSat, 509 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2166 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 2219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 509 IncrementalHoareTripleChecker+Valid, 1710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:36:51,135 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2166 Valid, 694 Invalid, 2219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [509 Valid, 1710 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-09 04:36:51,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37506 states. [2024-11-09 04:36:58,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37506 to 34358. [2024-11-09 04:36:58,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34358 states, 29007 states have (on average 1.16926948667563) internal successors, (33917), 29135 states have internal predecessors, (33917), 2893 states have call successors, (2893), 2411 states have call predecessors, (2893), 2457 states have return successors, (3885), 2812 states have call predecessors, (3885), 2893 states have call successors, (3885) [2024-11-09 04:36:58,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34358 states to 34358 states and 40695 transitions. [2024-11-09 04:36:58,238 INFO L78 Accepts]: Start accepts. Automaton has 34358 states and 40695 transitions. Word has length 207 [2024-11-09 04:36:58,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:36:58,239 INFO L471 AbstractCegarLoop]: Abstraction has 34358 states and 40695 transitions. [2024-11-09 04:36:58,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 15 states have (on average 15.066666666666666) internal successors, (226), 17 states have internal predecessors, (226), 11 states have call successors, (44), 8 states have call predecessors, (44), 12 states have return successors, (45), 11 states have call predecessors, (45), 11 states have call successors, (45) [2024-11-09 04:36:58,239 INFO L276 IsEmpty]: Start isEmpty. Operand 34358 states and 40695 transitions. [2024-11-09 04:36:58,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2024-11-09 04:36:58,271 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:36:58,271 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:36:58,312 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-09 04:36:58,471 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25978a8-ac88-470d-aa51-8239e8e4a1c9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-11-09 04:36:58,472 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:36:58,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:36:58,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1503080848, now seen corresponding path program 1 times [2024-11-09 04:36:58,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:36:58,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481045282] [2024-11-09 04:36:58,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:36:58,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:36:58,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:36:58,941 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2024-11-09 04:36:58,941 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:36:58,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481045282] [2024-11-09 04:36:58,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481045282] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:36:58,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:36:58,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-09 04:36:58,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190472769] [2024-11-09 04:36:58,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:36:58,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 04:36:58,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:36:58,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 04:36:58,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:36:58,943 INFO L87 Difference]: Start difference. First operand 34358 states and 40695 transitions. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12)