./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label41+token_ring.01.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_d7824c88-5faf-482d-aa68-560d34951a78/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7824c88-5faf-482d-aa68-560d34951a78/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7824c88-5faf-482d-aa68-560d34951a78/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7824c88-5faf-482d-aa68-560d34951a78/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label41+token_ring.01.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7824c88-5faf-482d-aa68-560d34951a78/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7824c88-5faf-482d-aa68-560d34951a78/bin/utaipan-verify-NcY6lQBIFX --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 738a2e75c3974a334a4730af8ad8a1bca696e22b6aef9e5670f827b7767c7884 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:44:54,431 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:44:54,503 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7824c88-5faf-482d-aa68-560d34951a78/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:44:54,509 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:44:54,509 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:44:54,537 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:44:54,538 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:44:54,539 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:44:54,539 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:44:54,540 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:44:54,541 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:44:54,541 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:44:54,542 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:44:54,542 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:44:54,543 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:44:54,543 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:44:54,544 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:44:54,544 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:44:54,545 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:44:54,546 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:44:54,546 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:44:54,547 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:44:54,548 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:44:54,548 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:44:54,549 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:44:54,563 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:44:54,564 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:44:54,565 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:44:54,565 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:44:54,566 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:44:54,566 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:44:54,567 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:44:54,567 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:44:54,568 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:44:54,568 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:44:54,569 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:44:54,569 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:44:54,570 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:44:54,570 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:44:54,571 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:44:54,571 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:44:54,572 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:44:54,572 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:44:54,573 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:44:54,573 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:44:54,573 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_d7824c88-5faf-482d-aa68-560d34951a78/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7824c88-5faf-482d-aa68-560d34951a78/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 738a2e75c3974a334a4730af8ad8a1bca696e22b6aef9e5670f827b7767c7884 [2023-11-12 00:44:54,825 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:44:54,857 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:44:54,860 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:44:54,862 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:44:54,863 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:44:54,865 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7824c88-5faf-482d-aa68-560d34951a78/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/combinations/Problem05_label41+token_ring.01.cil-1.c [2023-11-12 00:44:58,048 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:44:58,771 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:44:58,772 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7824c88-5faf-482d-aa68-560d34951a78/sv-benchmarks/c/combinations/Problem05_label41+token_ring.01.cil-1.c [2023-11-12 00:44:58,829 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7824c88-5faf-482d-aa68-560d34951a78/bin/utaipan-verify-NcY6lQBIFX/data/6c6fd5dc6/c70f3729ff914a5899faf811789a3982/FLAG0b0de7cbf [2023-11-12 00:44:58,846 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7824c88-5faf-482d-aa68-560d34951a78/bin/utaipan-verify-NcY6lQBIFX/data/6c6fd5dc6/c70f3729ff914a5899faf811789a3982 [2023-11-12 00:44:58,852 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:44:58,855 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:44:58,859 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:44:58,859 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:44:58,864 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:44:58,868 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:44:58" (1/1) ... [2023-11-12 00:44:58,869 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4273d2e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:44:58, skipping insertion in model container [2023-11-12 00:44:58,869 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:44:58" (1/1) ... [2023-11-12 00:44:59,180 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:45:01,353 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7824c88-5faf-482d-aa68-560d34951a78/sv-benchmarks/c/combinations/Problem05_label41+token_ring.01.cil-1.c[376251,376264] [2023-11-12 00:45:01,392 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7824c88-5faf-482d-aa68-560d34951a78/sv-benchmarks/c/combinations/Problem05_label41+token_ring.01.cil-1.c[383339,383352] [2023-11-12 00:45:01,578 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:45:01,591 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:45:02,884 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7824c88-5faf-482d-aa68-560d34951a78/sv-benchmarks/c/combinations/Problem05_label41+token_ring.01.cil-1.c[376251,376264] [2023-11-12 00:45:02,895 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7824c88-5faf-482d-aa68-560d34951a78/sv-benchmarks/c/combinations/Problem05_label41+token_ring.01.cil-1.c[383339,383352] [2023-11-12 00:45:02,907 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:45:02,986 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:45:02,987 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:02 WrapperNode [2023-11-12 00:45:02,987 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:45:02,988 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:45:02,988 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:45:02,989 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:45:02,997 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:02" (1/1) ... [2023-11-12 00:45:03,146 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:02" (1/1) ... [2023-11-12 00:45:03,651 INFO L138 Inliner]: procedures = 46, calls = 44, calls flagged for inlining = 24, calls inlined = 24, statements flattened = 12568 [2023-11-12 00:45:03,651 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:45:03,652 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:45:03,652 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:45:03,652 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:45:03,666 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:02" (1/1) ... [2023-11-12 00:45:03,666 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:02" (1/1) ... [2023-11-12 00:45:03,753 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:02" (1/1) ... [2023-11-12 00:45:03,753 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:02" (1/1) ... [2023-11-12 00:45:04,064 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:02" (1/1) ... [2023-11-12 00:45:04,117 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:02" (1/1) ... [2023-11-12 00:45:04,162 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:02" (1/1) ... [2023-11-12 00:45:04,203 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:02" (1/1) ... [2023-11-12 00:45:04,318 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:45:04,320 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:45:04,320 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:45:04,321 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:45:04,322 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:02" (1/1) ... [2023-11-12 00:45:04,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:45:04,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7824c88-5faf-482d-aa68-560d34951a78/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:45:04,401 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7824c88-5faf-482d-aa68-560d34951a78/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:45:04,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7824c88-5faf-482d-aa68-560d34951a78/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:45:04,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:45:04,613 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-12 00:45:04,613 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-12 00:45:04,613 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-12 00:45:04,614 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-12 00:45:04,614 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-12 00:45:04,614 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-12 00:45:04,614 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-12 00:45:04,615 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-12 00:45:04,615 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-12 00:45:04,615 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-12 00:45:04,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:45:04,615 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-12 00:45:04,616 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-12 00:45:04,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:45:04,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:45:04,748 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:45:04,751 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:45:13,886 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:45:16,437 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:45:16,438 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-12 00:45:16,444 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:45:16 BoogieIcfgContainer [2023-11-12 00:45:16,444 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:45:16,447 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:45:16,448 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:45:16,451 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:45:16,452 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:44:58" (1/3) ... [2023-11-12 00:45:16,453 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52a3ba5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:45:16, skipping insertion in model container [2023-11-12 00:45:16,453 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:02" (2/3) ... [2023-11-12 00:45:16,453 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52a3ba5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:45:16, skipping insertion in model container [2023-11-12 00:45:16,454 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:45:16" (3/3) ... [2023-11-12 00:45:16,455 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label41+token_ring.01.cil-1.c [2023-11-12 00:45:16,475 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:45:16,476 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-12 00:45:16,574 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:45:16,582 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@414c8b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:45:16,582 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 00:45:16,594 INFO L276 IsEmpty]: Start isEmpty. Operand has 1712 states, 1688 states have (on average 1.978080568720379) internal successors, (3339), 1691 states have internal predecessors, (3339), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-12 00:45:16,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-12 00:45:16,606 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:16,607 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:45:16,607 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:45:16,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:16,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1958795838, now seen corresponding path program 1 times [2023-11-12 00:45:16,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:16,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960576548] [2023-11-12 00:45:16,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:16,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:16,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:17,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:45:17,003 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:17,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960576548] [2023-11-12 00:45:17,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960576548] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:45:17,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:45:17,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:45:17,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659130705] [2023-11-12 00:45:17,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:45:17,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:45:17,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:17,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:45:17,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:45:17,071 INFO L87 Difference]: Start difference. First operand has 1712 states, 1688 states have (on average 1.978080568720379) internal successors, (3339), 1691 states have internal predecessors, (3339), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:45:18,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:45:18,046 INFO L93 Difference]: Finished difference Result 3476 states and 6817 transitions. [2023-11-12 00:45:18,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:45:18,049 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 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 34 [2023-11-12 00:45:18,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:45:18,072 INFO L225 Difference]: With dead ends: 3476 [2023-11-12 00:45:18,073 INFO L226 Difference]: Without dead ends: 1763 [2023-11-12 00:45:18,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:45:18,085 INFO L413 NwaCegarLoop]: 3185 mSDtfsCounter, 3420 mSDsluCounter, 3131 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3420 SdHoareTripleChecker+Valid, 6316 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 00:45:18,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3420 Valid, 6316 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 00:45:18,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1763 states. [2023-11-12 00:45:18,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1763 to 1762. [2023-11-12 00:45:18,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1762 states, 1722 states have (on average 1.9581881533101044) internal successors, (3372), 1725 states have internal predecessors, (3372), 26 states have call successors, (26), 12 states have call predecessors, (26), 12 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-12 00:45:18,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1762 states to 1762 states and 3424 transitions. [2023-11-12 00:45:18,254 INFO L78 Accepts]: Start accepts. Automaton has 1762 states and 3424 transitions. Word has length 34 [2023-11-12 00:45:18,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:45:18,255 INFO L495 AbstractCegarLoop]: Abstraction has 1762 states and 3424 transitions. [2023-11-12 00:45:18,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:45:18,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1762 states and 3424 transitions. [2023-11-12 00:45:18,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-12 00:45:18,266 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:18,267 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:45:18,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:45:18,268 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:45:18,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:18,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1001047911, now seen corresponding path program 1 times [2023-11-12 00:45:18,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:18,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213902600] [2023-11-12 00:45:18,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:18,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:18,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:18,936 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 00:45:18,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:18,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213902600] [2023-11-12 00:45:18,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213902600] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:45:18,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:45:18,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:45:18,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482729093] [2023-11-12 00:45:18,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:45:18,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:45:18,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:18,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:45:18,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:45:18,947 INFO L87 Difference]: Start difference. First operand 1762 states and 3424 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-12 00:45:19,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:45:19,840 INFO L93 Difference]: Finished difference Result 1980 states and 3696 transitions. [2023-11-12 00:45:19,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:45:19,841 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 60 [2023-11-12 00:45:19,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:45:19,857 INFO L225 Difference]: With dead ends: 1980 [2023-11-12 00:45:19,857 INFO L226 Difference]: Without dead ends: 1865 [2023-11-12 00:45:19,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-11-12 00:45:19,861 INFO L413 NwaCegarLoop]: 3144 mSDtfsCounter, 3420 mSDsluCounter, 6230 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3430 SdHoareTripleChecker+Valid, 9374 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:45:19,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3430 Valid, 9374 Invalid, 815 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [57 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 00:45:19,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1865 states. [2023-11-12 00:45:19,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1865 to 1863. [2023-11-12 00:45:19,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1791 states have (on average 1.9290898939140144) internal successors, (3455), 1795 states have internal predecessors, (3455), 46 states have call successors, (46), 24 states have call predecessors, (46), 24 states have return successors, (46), 44 states have call predecessors, (46), 46 states have call successors, (46) [2023-11-12 00:45:19,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 3547 transitions. [2023-11-12 00:45:19,949 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 3547 transitions. Word has length 60 [2023-11-12 00:45:19,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:45:19,950 INFO L495 AbstractCegarLoop]: Abstraction has 1863 states and 3547 transitions. [2023-11-12 00:45:19,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-12 00:45:19,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 3547 transitions. [2023-11-12 00:45:19,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-12 00:45:19,956 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:19,957 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:45:19,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:45:19,957 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:45:19,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:19,958 INFO L85 PathProgramCache]: Analyzing trace with hash 195695348, now seen corresponding path program 1 times [2023-11-12 00:45:19,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:19,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618111064] [2023-11-12 00:45:19,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:19,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:20,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:20,076 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 00:45:20,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:20,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618111064] [2023-11-12 00:45:20,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618111064] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:45:20,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:45:20,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:45:20,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526664118] [2023-11-12 00:45:20,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:45:20,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:45:20,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:20,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:45:20,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:45:20,080 INFO L87 Difference]: Start difference. First operand 1863 states and 3547 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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) [2023-11-12 00:45:20,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:45:20,615 INFO L93 Difference]: Finished difference Result 2031 states and 3757 transitions. [2023-11-12 00:45:20,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:45:20,616 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), 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 62 [2023-11-12 00:45:20,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:45:20,630 INFO L225 Difference]: With dead ends: 2031 [2023-11-12 00:45:20,631 INFO L226 Difference]: Without dead ends: 1917 [2023-11-12 00:45:20,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:45:20,640 INFO L413 NwaCegarLoop]: 3159 mSDtfsCounter, 27 mSDsluCounter, 3127 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 6286 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:45:20,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 6286 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:45:20,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1917 states. [2023-11-12 00:45:20,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1917 to 1887. [2023-11-12 00:45:20,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1811 states have (on average 1.9221424627277748) internal successors, (3481), 1815 states have internal predecessors, (3481), 48 states have call successors, (48), 26 states have call predecessors, (48), 26 states have return successors, (48), 46 states have call predecessors, (48), 48 states have call successors, (48) [2023-11-12 00:45:20,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 3577 transitions. [2023-11-12 00:45:20,730 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 3577 transitions. Word has length 62 [2023-11-12 00:45:20,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:45:20,733 INFO L495 AbstractCegarLoop]: Abstraction has 1887 states and 3577 transitions. [2023-11-12 00:45:20,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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) [2023-11-12 00:45:20,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 3577 transitions. [2023-11-12 00:45:20,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-11-12 00:45:20,737 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:20,737 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-12 00:45:20,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:45:20,738 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:45:20,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:20,739 INFO L85 PathProgramCache]: Analyzing trace with hash -2006705567, now seen corresponding path program 1 times [2023-11-12 00:45:20,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:20,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306393142] [2023-11-12 00:45:20,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:20,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:20,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:20,819 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-12 00:45:20,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:20,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306393142] [2023-11-12 00:45:20,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306393142] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:45:20,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:45:20,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:45:20,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892302590] [2023-11-12 00:45:20,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:45:20,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:45:20,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:20,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:45:20,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:45:20,822 INFO L87 Difference]: Start difference. First operand 1887 states and 3577 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2023-11-12 00:45:21,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:45:21,267 INFO L93 Difference]: Finished difference Result 2248 states and 4033 transitions. [2023-11-12 00:45:21,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:45:21,268 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 78 [2023-11-12 00:45:21,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:45:21,282 INFO L225 Difference]: With dead ends: 2248 [2023-11-12 00:45:21,283 INFO L226 Difference]: Without dead ends: 2007 [2023-11-12 00:45:21,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:45:21,285 INFO L413 NwaCegarLoop]: 3159 mSDtfsCounter, 3324 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3324 SdHoareTripleChecker+Valid, 3221 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:45:21,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3324 Valid, 3221 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:45:21,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2007 states. [2023-11-12 00:45:21,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2007 to 2002. [2023-11-12 00:45:21,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2002 states, 1892 states have (on average 1.890063424947146) internal successors, (3576), 1897 states have internal predecessors, (3576), 69 states have call successors, (69), 39 states have call predecessors, (69), 39 states have return successors, (69), 66 states have call predecessors, (69), 69 states have call successors, (69) [2023-11-12 00:45:21,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2002 states to 2002 states and 3714 transitions. [2023-11-12 00:45:21,384 INFO L78 Accepts]: Start accepts. Automaton has 2002 states and 3714 transitions. Word has length 78 [2023-11-12 00:45:21,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:45:21,385 INFO L495 AbstractCegarLoop]: Abstraction has 2002 states and 3714 transitions. [2023-11-12 00:45:21,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2023-11-12 00:45:21,385 INFO L276 IsEmpty]: Start isEmpty. Operand 2002 states and 3714 transitions. [2023-11-12 00:45:21,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-12 00:45:21,390 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:21,390 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-12 00:45:21,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:45:21,390 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:45:21,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:21,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1366431462, now seen corresponding path program 1 times [2023-11-12 00:45:21,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:21,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768854548] [2023-11-12 00:45:21,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:21,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:21,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:21,534 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-12 00:45:21,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:21,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768854548] [2023-11-12 00:45:21,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768854548] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:45:21,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931981013] [2023-11-12 00:45:21,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:21,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:21,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7824c88-5faf-482d-aa68-560d34951a78/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:45:21,539 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7824c88-5faf-482d-aa68-560d34951a78/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:45:21,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7824c88-5faf-482d-aa68-560d34951a78/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:45:21,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:21,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:45:21,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:45:21,840 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-12 00:45:21,842 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:45:21,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931981013] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:45:21,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:45:21,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-12 00:45:21,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136191038] [2023-11-12 00:45:21,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:45:21,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:45:21,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:21,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:45:21,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:45:21,846 INFO L87 Difference]: Start difference. First operand 2002 states and 3714 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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) [2023-11-12 00:45:22,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:45:22,371 INFO L93 Difference]: Finished difference Result 2317 states and 4109 transitions. [2023-11-12 00:45:22,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:45:22,372 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 90 [2023-11-12 00:45:22,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:45:22,388 INFO L225 Difference]: With dead ends: 2317 [2023-11-12 00:45:22,388 INFO L226 Difference]: Without dead ends: 2077 [2023-11-12 00:45:22,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:45:22,393 INFO L413 NwaCegarLoop]: 3156 mSDtfsCounter, 36 mSDsluCounter, 3128 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 6284 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:45:22,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 6284 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:45:22,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2077 states. [2023-11-12 00:45:22,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2077 to 2030. [2023-11-12 00:45:22,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2030 states, 1914 states have (on average 1.8834900731452455) internal successors, (3605), 1919 states have internal predecessors, (3605), 72 states have call successors, (72), 42 states have call predecessors, (72), 42 states have return successors, (72), 69 states have call predecessors, (72), 72 states have call successors, (72) [2023-11-12 00:45:22,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 3749 transitions. [2023-11-12 00:45:22,493 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 3749 transitions. Word has length 90 [2023-11-12 00:45:22,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:45:22,495 INFO L495 AbstractCegarLoop]: Abstraction has 2030 states and 3749 transitions. [2023-11-12 00:45:22,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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) [2023-11-12 00:45:22,496 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 3749 transitions. [2023-11-12 00:45:22,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-12 00:45:22,498 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:22,499 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-12 00:45:22,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7824c88-5faf-482d-aa68-560d34951a78/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 00:45:22,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7824c88-5faf-482d-aa68-560d34951a78/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:22,706 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:45:22,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:22,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1693961766, now seen corresponding path program 2 times [2023-11-12 00:45:22,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:22,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416947346] [2023-11-12 00:45:22,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:22,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:22,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:22,946 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-12 00:45:22,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:22,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416947346] [2023-11-12 00:45:22,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416947346] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:45:22,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421722777] [2023-11-12 00:45:22,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:45:22,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:22,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7824c88-5faf-482d-aa68-560d34951a78/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:45:22,950 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7824c88-5faf-482d-aa68-560d34951a78/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:45:22,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7824c88-5faf-482d-aa68-560d34951a78/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:45:23,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 00:45:23,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:45:23,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:45:23,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:45:23,106 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-12 00:45:23,107 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:45:23,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421722777] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:45:23,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:45:23,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-12 00:45:23,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203053572] [2023-11-12 00:45:23,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:45:23,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:45:23,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:23,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:45:23,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:45:23,110 INFO L87 Difference]: Start difference. First operand 2030 states and 3749 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2023-11-12 00:45:23,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:45:23,651 INFO L93 Difference]: Finished difference Result 2302 states and 4104 transitions. [2023-11-12 00:45:23,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:45:23,652 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 90 [2023-11-12 00:45:23,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:45:23,667 INFO L225 Difference]: With dead ends: 2302 [2023-11-12 00:45:23,667 INFO L226 Difference]: Without dead ends: 2034 [2023-11-12 00:45:23,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:45:23,674 INFO L413 NwaCegarLoop]: 3152 mSDtfsCounter, 68 mSDsluCounter, 3119 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 6271 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:45:23,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 6271 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:45:23,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2034 states. [2023-11-12 00:45:23,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2034 to 2028. [2023-11-12 00:45:23,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 1912 states have (on average 1.87918410041841) internal successors, (3593), 1917 states have internal predecessors, (3593), 72 states have call successors, (72), 42 states have call predecessors, (72), 42 states have return successors, (72), 69 states have call predecessors, (72), 72 states have call successors, (72) [2023-11-12 00:45:23,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 3737 transitions. [2023-11-12 00:45:23,767 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 3737 transitions. Word has length 90 [2023-11-12 00:45:23,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:45:23,767 INFO L495 AbstractCegarLoop]: Abstraction has 2028 states and 3737 transitions. [2023-11-12 00:45:23,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2023-11-12 00:45:23,768 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 3737 transitions. [2023-11-12 00:45:23,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-12 00:45:23,776 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:23,778 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-12 00:45:23,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7824c88-5faf-482d-aa68-560d34951a78/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:45:23,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7824c88-5faf-482d-aa68-560d34951a78/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 00:45:23,985 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:45:23,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:23,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1120464006, now seen corresponding path program 1 times [2023-11-12 00:45:23,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:23,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182055740] [2023-11-12 00:45:23,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:23,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:24,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:24,182 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-12 00:45:24,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:24,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182055740] [2023-11-12 00:45:24,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182055740] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:45:24,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779569314] [2023-11-12 00:45:24,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:24,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:24,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7824c88-5faf-482d-aa68-560d34951a78/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:45:24,184 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7824c88-5faf-482d-aa68-560d34951a78/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:45:24,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7824c88-5faf-482d-aa68-560d34951a78/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:45:24,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:24,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:45:24,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:45:24,352 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-12 00:45:24,353 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:45:24,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779569314] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:45:24,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:45:24,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-12 00:45:24,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452268596] [2023-11-12 00:45:24,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:45:24,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:45:24,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:24,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:45:24,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:45:24,356 INFO L87 Difference]: Start difference. First operand 2028 states and 3737 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2023-11-12 00:45:24,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:45:24,909 INFO L93 Difference]: Finished difference Result 2345 states and 4122 transitions. [2023-11-12 00:45:24,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:45:24,910 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 90 [2023-11-12 00:45:24,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:45:24,923 INFO L225 Difference]: With dead ends: 2345 [2023-11-12 00:45:24,923 INFO L226 Difference]: Without dead ends: 2089 [2023-11-12 00:45:24,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:45:24,926 INFO L413 NwaCegarLoop]: 3133 mSDtfsCounter, 3334 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3334 SdHoareTripleChecker+Valid, 3147 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:45:24,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3334 Valid, 3147 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:45:24,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2023-11-12 00:45:24,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 2089. [2023-11-12 00:45:24,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2089 states, 1963 states have (on average 1.857870606214977) internal successors, (3647), 1968 states have internal predecessors, (3647), 74 states have call successors, (74), 50 states have call predecessors, (74), 50 states have return successors, (74), 71 states have call predecessors, (74), 74 states have call successors, (74) [2023-11-12 00:45:25,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2089 states to 2089 states and 3795 transitions. [2023-11-12 00:45:25,009 INFO L78 Accepts]: Start accepts. Automaton has 2089 states and 3795 transitions. Word has length 90 [2023-11-12 00:45:25,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:45:25,010 INFO L495 AbstractCegarLoop]: Abstraction has 2089 states and 3795 transitions. [2023-11-12 00:45:25,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2023-11-12 00:45:25,010 INFO L276 IsEmpty]: Start isEmpty. Operand 2089 states and 3795 transitions. [2023-11-12 00:45:25,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-12 00:45:25,013 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:25,013 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-12 00:45:25,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7824c88-5faf-482d-aa68-560d34951a78/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:45:25,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7824c88-5faf-482d-aa68-560d34951a78/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 00:45:25,219 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:45:25,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:25,220 INFO L85 PathProgramCache]: Analyzing trace with hash -233053473, now seen corresponding path program 1 times [2023-11-12 00:45:25,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:25,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542137447] [2023-11-12 00:45:25,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:25,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:25,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:25,433 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-12 00:45:25,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:25,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542137447] [2023-11-12 00:45:25,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542137447] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:45:25,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303085164] [2023-11-12 00:45:25,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:25,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:25,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7824c88-5faf-482d-aa68-560d34951a78/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:45:25,437 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7824c88-5faf-482d-aa68-560d34951a78/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:45:25,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7824c88-5faf-482d-aa68-560d34951a78/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:45:25,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:25,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:45:25,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:45:25,605 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 00:45:25,606 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:45:25,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303085164] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:45:25,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:45:25,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-12 00:45:25,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8989213] [2023-11-12 00:45:25,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:45:25,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:45:25,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:25,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:45:25,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:45:25,609 INFO L87 Difference]: Start difference. First operand 2089 states and 3795 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2023-11-12 00:45:26,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:45:26,158 INFO L93 Difference]: Finished difference Result 2698 states and 4514 transitions. [2023-11-12 00:45:26,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:45:26,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 91 [2023-11-12 00:45:26,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:45:26,173 INFO L225 Difference]: With dead ends: 2698 [2023-11-12 00:45:26,173 INFO L226 Difference]: Without dead ends: 2256 [2023-11-12 00:45:26,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:45:26,176 INFO L413 NwaCegarLoop]: 3142 mSDtfsCounter, 32 mSDsluCounter, 3117 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 6259 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:45:26,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 6259 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:45:26,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2023-11-12 00:45:26,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 2136. [2023-11-12 00:45:26,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2136 states, 1998 states have (on average 1.8463463463463463) internal successors, (3689), 2004 states have internal predecessors, (3689), 80 states have call successors, (80), 56 states have call predecessors, (80), 56 states have return successors, (80), 76 states have call predecessors, (80), 80 states have call successors, (80) [2023-11-12 00:45:26,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 3849 transitions. [2023-11-12 00:45:26,271 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 3849 transitions. Word has length 91 [2023-11-12 00:45:26,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:45:26,271 INFO L495 AbstractCegarLoop]: Abstraction has 2136 states and 3849 transitions. [2023-11-12 00:45:26,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2023-11-12 00:45:26,272 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 3849 transitions. [2023-11-12 00:45:26,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-12 00:45:26,274 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:26,274 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-12 00:45:26,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7824c88-5faf-482d-aa68-560d34951a78/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-12 00:45:26,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7824c88-5faf-482d-aa68-560d34951a78/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-12 00:45:26,481 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:45:26,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:26,481 INFO L85 PathProgramCache]: Analyzing trace with hash 899060752, now seen corresponding path program 1 times [2023-11-12 00:45:26,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:26,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505340030] [2023-11-12 00:45:26,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:26,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:26,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:26,665 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-12 00:45:26,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:26,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505340030] [2023-11-12 00:45:26,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505340030] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:45:26,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:45:26,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:45:26,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162771730] [2023-11-12 00:45:26,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:45:26,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:45:26,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:26,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:45:26,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:45:26,669 INFO L87 Difference]: Start difference. First operand 2136 states and 3849 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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) [2023-11-12 00:45:27,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:45:27,366 INFO L93 Difference]: Finished difference Result 2906 states and 4768 transitions. [2023-11-12 00:45:27,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:45:27,367 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 93 [2023-11-12 00:45:27,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:45:27,383 INFO L225 Difference]: With dead ends: 2906 [2023-11-12 00:45:27,383 INFO L226 Difference]: Without dead ends: 2654 [2023-11-12 00:45:27,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:45:27,386 INFO L413 NwaCegarLoop]: 3180 mSDtfsCounter, 3397 mSDsluCounter, 3136 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3397 SdHoareTripleChecker+Valid, 6316 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:45:27,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3397 Valid, 6316 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:45:27,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2654 states. [2023-11-12 00:45:27,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2654 to 2452. [2023-11-12 00:45:27,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 2228 states have (on average 1.7809694793536803) internal successors, (3968), 2233 states have internal predecessors, (3968), 131 states have call successors, (131), 91 states have call predecessors, (131), 91 states have return successors, (131), 128 states have call predecessors, (131), 131 states have call successors, (131) [2023-11-12 00:45:27,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 4230 transitions. [2023-11-12 00:45:27,528 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 4230 transitions. Word has length 93 [2023-11-12 00:45:27,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:45:27,528 INFO L495 AbstractCegarLoop]: Abstraction has 2452 states and 4230 transitions. [2023-11-12 00:45:27,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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) [2023-11-12 00:45:27,529 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 4230 transitions. [2023-11-12 00:45:27,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-12 00:45:27,531 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:27,532 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-12 00:45:27,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 00:45:27,532 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:45:27,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:27,533 INFO L85 PathProgramCache]: Analyzing trace with hash 459900453, now seen corresponding path program 1 times [2023-11-12 00:45:27,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:27,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904741100] [2023-11-12 00:45:27,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:27,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:27,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:27,739 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 17 proven. 14 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-12 00:45:27,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:27,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904741100] [2023-11-12 00:45:27,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904741100] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:45:27,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464698048] [2023-11-12 00:45:27,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:27,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:27,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7824c88-5faf-482d-aa68-560d34951a78/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:45:27,742 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7824c88-5faf-482d-aa68-560d34951a78/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:45:27,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7824c88-5faf-482d-aa68-560d34951a78/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:45:27,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:27,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-12 00:45:27,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:45:28,051 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 50 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 00:45:28,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:45:28,277 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-12 00:45:28,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464698048] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:45:28,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1230823737] [2023-11-12 00:45:28,305 INFO L159 IcfgInterpreter]: Started Sifa with 60 locations of interest [2023-11-12 00:45:28,305 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:45:28,309 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:45:28,314 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:45:28,315 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:45:37,966 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 59 for LOIs [2023-11-12 00:45:37,988 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 117 for LOIs [2023-11-12 00:45:38,104 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 59 for LOIs [2023-11-12 00:45:38,110 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 59 for LOIs [2023-11-12 00:45:38,127 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 80 for LOIs [2023-11-12 00:45:38,259 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 59 for LOIs [2023-11-12 00:45:38,601 INFO L180 IcfgInterpreter]: Interpretation finished