./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label48+token_ring.09.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label48+token_ring.09.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh --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 d1799d95d0e216b78a87282e1c07d247f4f74dae2fd2ab1bbf062b2cf09b9c7c --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 19:20:26,600 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 19:20:26,666 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 19:20:26,671 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 19:20:26,672 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 19:20:26,696 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 19:20:26,697 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 19:20:26,697 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 19:20:26,698 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 19:20:26,698 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 19:20:26,699 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 19:20:26,699 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 19:20:26,700 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 19:20:26,700 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 19:20:26,701 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 19:20:26,701 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 19:20:26,702 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 19:20:26,702 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 19:20:26,703 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 19:20:26,703 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 19:20:26,704 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 19:20:26,705 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 19:20:26,705 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 19:20:26,706 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 19:20:26,706 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 19:20:26,706 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 19:20:26,707 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 19:20:26,707 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 19:20:26,708 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 19:20:26,708 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 19:20:26,708 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 19:20:26,709 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 19:20:26,709 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 19:20:26,710 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 19:20:26,710 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 19:20:26,710 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 19:20:26,711 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 19:20:26,711 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:20:26,711 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 19:20:26,711 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 19:20:26,711 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 19:20:26,712 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 19:20:26,712 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 19:20:26,712 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 19:20:26,712 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 19:20:26,713 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 19:20:26,713 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 19:20:26,713 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_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d1799d95d0e216b78a87282e1c07d247f4f74dae2fd2ab1bbf062b2cf09b9c7c [2023-12-02 19:20:26,936 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 19:20:26,956 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 19:20:26,959 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 19:20:26,961 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 19:20:26,961 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 19:20:26,963 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/combinations/Problem05_label48+token_ring.09.cil-1.c [2023-12-02 19:20:29,869 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 19:20:30,514 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 19:20:30,514 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/sv-benchmarks/c/combinations/Problem05_label48+token_ring.09.cil-1.c [2023-12-02 19:20:30,586 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/data/60cf3f3c4/527bd977ba114df8a1fe86b9aaa3e52c/FLAG5e6c7b373 [2023-12-02 19:20:30,600 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/data/60cf3f3c4/527bd977ba114df8a1fe86b9aaa3e52c [2023-12-02 19:20:30,603 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 19:20:30,604 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 19:20:30,606 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 19:20:30,606 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 19:20:30,611 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 19:20:30,611 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:20:30" (1/1) ... [2023-12-02 19:20:30,613 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@620a54e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:20:30, skipping insertion in model container [2023-12-02 19:20:30,613 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:20:30" (1/1) ... [2023-12-02 19:20:30,857 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 19:20:32,658 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_ab31780d-71cf-4f22-b263-6e30d4660039/sv-benchmarks/c/combinations/Problem05_label48+token_ring.09.cil-1.c[375709,375722] [2023-12-02 19:20:32,694 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_ab31780d-71cf-4f22-b263-6e30d4660039/sv-benchmarks/c/combinations/Problem05_label48+token_ring.09.cil-1.c[383339,383352] [2023-12-02 19:20:32,961 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:20:32,974 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 19:20:33,952 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_ab31780d-71cf-4f22-b263-6e30d4660039/sv-benchmarks/c/combinations/Problem05_label48+token_ring.09.cil-1.c[375709,375722] [2023-12-02 19:20:33,963 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_ab31780d-71cf-4f22-b263-6e30d4660039/sv-benchmarks/c/combinations/Problem05_label48+token_ring.09.cil-1.c[383339,383352] [2023-12-02 19:20:33,982 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:20:34,039 INFO L206 MainTranslator]: Completed translation [2023-12-02 19:20:34,039 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:20:34 WrapperNode [2023-12-02 19:20:34,039 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 19:20:34,040 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 19:20:34,040 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 19:20:34,040 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 19:20:34,046 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:20:34" (1/1) ... [2023-12-02 19:20:34,138 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:20:34" (1/1) ... [2023-12-02 19:20:34,387 INFO L138 Inliner]: procedures = 62, calls = 68, calls flagged for inlining = 40, calls inlined = 40, statements flattened = 13048 [2023-12-02 19:20:34,387 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 19:20:34,388 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 19:20:34,388 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 19:20:34,388 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 19:20:34,396 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:20:34" (1/1) ... [2023-12-02 19:20:34,396 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:20:34" (1/1) ... [2023-12-02 19:20:34,490 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:20:34" (1/1) ... [2023-12-02 19:20:34,490 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:20:34" (1/1) ... [2023-12-02 19:20:34,692 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:20:34" (1/1) ... [2023-12-02 19:20:34,730 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:20:34" (1/1) ... [2023-12-02 19:20:34,754 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:20:34" (1/1) ... [2023-12-02 19:20:34,773 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:20:34" (1/1) ... [2023-12-02 19:20:34,823 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 19:20:34,824 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 19:20:34,824 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 19:20:34,825 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 19:20:34,825 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:20:34" (1/1) ... [2023-12-02 19:20:34,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:20:34,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:20:34,855 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 19:20:34,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 19:20:34,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 19:20:34,891 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-12-02 19:20:34,892 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-12-02 19:20:34,892 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-12-02 19:20:34,892 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-12-02 19:20:34,892 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-12-02 19:20:34,892 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-12-02 19:20:34,893 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-12-02 19:20:34,893 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-12-02 19:20:34,893 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-12-02 19:20:34,893 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-12-02 19:20:34,893 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-12-02 19:20:34,893 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-12-02 19:20:34,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 19:20:34,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 19:20:34,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 19:20:35,065 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 19:20:35,067 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 19:20:42,635 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 19:20:44,695 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 19:20:44,695 INFO L309 CfgBuilder]: Removed 13 assume(true) statements. [2023-12-02 19:20:44,697 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:20:44 BoogieIcfgContainer [2023-12-02 19:20:44,698 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 19:20:44,700 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 19:20:44,700 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 19:20:44,702 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 19:20:44,703 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:20:30" (1/3) ... [2023-12-02 19:20:44,703 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36cdcbf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:20:44, skipping insertion in model container [2023-12-02 19:20:44,703 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:20:34" (2/3) ... [2023-12-02 19:20:44,704 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36cdcbf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:20:44, skipping insertion in model container [2023-12-02 19:20:44,704 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:20:44" (3/3) ... [2023-12-02 19:20:44,705 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label48+token_ring.09.cil-1.c [2023-12-02 19:20:44,720 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 19:20:44,720 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-02 19:20:44,799 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 19:20:44,805 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;@48ea91d2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 19:20:44,805 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-02 19:20:44,816 INFO L276 IsEmpty]: Start isEmpty. Operand has 1808 states, 1776 states have (on average 1.9566441441441442) internal successors, (3475), 1779 states have internal predecessors, (3475), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-12-02 19:20:44,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-02 19:20:44,826 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:20:44,827 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:20:44,828 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:20:44,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:20:44,832 INFO L85 PathProgramCache]: Analyzing trace with hash -432629509, now seen corresponding path program 1 times [2023-12-02 19:20:44,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:20:44,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998349300] [2023-12-02 19:20:44,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:20:44,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:20:44,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:20:45,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:20:45,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:20:45,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998349300] [2023-12-02 19:20:45,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998349300] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:20:45,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:20:45,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 19:20:45,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893944244] [2023-12-02 19:20:45,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:20:45,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:20:45,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:20:45,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:20:45,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:20:45,266 INFO L87 Difference]: Start difference. First operand has 1808 states, 1776 states have (on average 1.9566441441441442) internal successors, (3475), 1779 states have internal predecessors, (3475), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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) [2023-12-02 19:20:46,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:20:46,173 INFO L93 Difference]: Finished difference Result 3764 states and 7289 transitions. [2023-12-02 19:20:46,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:20:46,175 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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 58 [2023-12-02 19:20:46,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:20:46,200 INFO L225 Difference]: With dead ends: 3764 [2023-12-02 19:20:46,200 INFO L226 Difference]: Without dead ends: 1955 [2023-12-02 19:20:46,209 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 [2023-12-02 19:20:46,212 INFO L413 NwaCegarLoop]: 3441 mSDtfsCounter, 3700 mSDsluCounter, 3355 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3700 SdHoareTripleChecker+Valid, 6796 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 19:20:46,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3700 Valid, 6796 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 19:20:46,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1955 states. [2023-12-02 19:20:46,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1955 to 1954. [2023-12-02 19:20:46,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1954 states, 1898 states have (on average 1.9199157007376186) internal successors, (3644), 1901 states have internal predecessors, (3644), 42 states have call successors, (42), 12 states have call predecessors, (42), 12 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2023-12-02 19:20:46,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1954 states to 1954 states and 3728 transitions. [2023-12-02 19:20:46,341 INFO L78 Accepts]: Start accepts. Automaton has 1954 states and 3728 transitions. Word has length 58 [2023-12-02 19:20:46,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:20:46,342 INFO L495 AbstractCegarLoop]: Abstraction has 1954 states and 3728 transitions. [2023-12-02 19:20:46,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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) [2023-12-02 19:20:46,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1954 states and 3728 transitions. [2023-12-02 19:20:46,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-12-02 19:20:46,351 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:20:46,352 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:20:46,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 19:20:46,353 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:20:46,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:20:46,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1103456031, now seen corresponding path program 1 times [2023-12-02 19:20:46,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:20:46,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68173349] [2023-12-02 19:20:46,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:20:46,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:20:46,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:20:46,583 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 19:20:46,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:20:46,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68173349] [2023-12-02 19:20:46,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68173349] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:20:46,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962100069] [2023-12-02 19:20:46,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:20:46,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:20:46,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:20:46,587 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:20:46,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 19:20:46,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:20:46,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 831 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 19:20:46,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:20:46,988 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 19:20:46,988 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:20:46,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962100069] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:20:46,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:20:46,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 19:20:46,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386027586] [2023-12-02 19:20:46,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:20:46,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:20:46,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:20:46,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:20:46,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:20:46,994 INFO L87 Difference]: Start difference. First operand 1954 states and 3728 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 19:20:47,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:20:47,544 INFO L93 Difference]: Finished difference Result 2563 states and 4645 transitions. [2023-12-02 19:20:47,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:20:47,545 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2023-12-02 19:20:47,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:20:47,563 INFO L225 Difference]: With dead ends: 2563 [2023-12-02 19:20:47,563 INFO L226 Difference]: Without dead ends: 2255 [2023-12-02 19:20:47,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:20:47,568 INFO L413 NwaCegarLoop]: 3301 mSDtfsCounter, 3463 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3463 SdHoareTripleChecker+Valid, 3491 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 19:20:47,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3463 Valid, 3491 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 19:20:47,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2255 states. [2023-12-02 19:20:47,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2255 to 2251. [2023-12-02 19:20:47,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2251 states, 2147 states have (on average 1.8653935724266417) internal successors, (4005), 2151 states have internal predecessors, (4005), 78 states have call successors, (78), 24 states have call predecessors, (78), 24 states have return successors, (78), 76 states have call predecessors, (78), 78 states have call successors, (78) [2023-12-02 19:20:47,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2251 states to 2251 states and 4161 transitions. [2023-12-02 19:20:47,685 INFO L78 Accepts]: Start accepts. Automaton has 2251 states and 4161 transitions. Word has length 116 [2023-12-02 19:20:47,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:20:47,686 INFO L495 AbstractCegarLoop]: Abstraction has 2251 states and 4161 transitions. [2023-12-02 19:20:47,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 19:20:47,687 INFO L276 IsEmpty]: Start isEmpty. Operand 2251 states and 4161 transitions. [2023-12-02 19:20:47,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-12-02 19:20:47,691 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:20:47,692 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:20:47,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-02 19:20:47,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:20:47,893 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:20:47,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:20:47,894 INFO L85 PathProgramCache]: Analyzing trace with hash -230840867, now seen corresponding path program 1 times [2023-12-02 19:20:47,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:20:47,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866413043] [2023-12-02 19:20:47,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:20:47,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:20:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:20:48,132 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 19:20:48,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:20:48,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866413043] [2023-12-02 19:20:48,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866413043] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:20:48,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241425438] [2023-12-02 19:20:48,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:20:48,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:20:48,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:20:48,136 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:20:48,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 19:20:48,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:20:48,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 19:20:48,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:20:48,396 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 19:20:48,396 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:20:48,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241425438] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:20:48,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:20:48,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 19:20:48,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775147108] [2023-12-02 19:20:48,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:20:48,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:20:48,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:20:48,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:20:48,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:20:48,400 INFO L87 Difference]: Start difference. First operand 2251 states and 4161 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 19:20:48,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:20:48,967 INFO L93 Difference]: Finished difference Result 3448 states and 5956 transitions. [2023-12-02 19:20:48,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:20:48,968 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2023-12-02 19:20:48,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:20:48,989 INFO L225 Difference]: With dead ends: 3448 [2023-12-02 19:20:48,990 INFO L226 Difference]: Without dead ends: 2843 [2023-12-02 19:20:48,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:20:48,996 INFO L413 NwaCegarLoop]: 3299 mSDtfsCounter, 3481 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3481 SdHoareTripleChecker+Valid, 3489 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 19:20:48,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3481 Valid, 3489 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 19:20:49,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2843 states. [2023-12-02 19:20:49,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2843 to 2837. [2023-12-02 19:20:49,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2837 states, 2639 states have (on average 1.786661614247821) internal successors, (4715), 2645 states have internal predecessors, (4715), 148 states have call successors, (148), 48 states have call predecessors, (148), 48 states have return successors, (148), 144 states have call predecessors, (148), 148 states have call successors, (148) [2023-12-02 19:20:49,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2837 states to 2837 states and 5011 transitions. [2023-12-02 19:20:49,144 INFO L78 Accepts]: Start accepts. Automaton has 2837 states and 5011 transitions. Word has length 116 [2023-12-02 19:20:49,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:20:49,145 INFO L495 AbstractCegarLoop]: Abstraction has 2837 states and 5011 transitions. [2023-12-02 19:20:49,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 19:20:49,146 INFO L276 IsEmpty]: Start isEmpty. Operand 2837 states and 5011 transitions. [2023-12-02 19:20:49,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-12-02 19:20:49,151 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:20:49,151 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:20:49,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 19:20:49,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:20:49,359 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:20:49,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:20:49,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1557590299, now seen corresponding path program 1 times [2023-12-02 19:20:49,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:20:49,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548164466] [2023-12-02 19:20:49,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:20:49,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:20:49,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:20:49,557 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 19:20:49,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:20:49,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548164466] [2023-12-02 19:20:49,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548164466] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:20:49,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215660485] [2023-12-02 19:20:49,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:20:49,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:20:49,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:20:49,564 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:20:49,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 19:20:49,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:20:49,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 19:20:49,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:20:49,840 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 19:20:49,840 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:20:49,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215660485] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:20:49,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:20:49,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 19:20:49,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869215115] [2023-12-02 19:20:49,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:20:49,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:20:49,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:20:49,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:20:49,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:20:49,843 INFO L87 Difference]: Start difference. First operand 2837 states and 5011 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 19:20:50,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:20:50,374 INFO L93 Difference]: Finished difference Result 5194 states and 8528 transitions. [2023-12-02 19:20:50,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:20:50,375 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2023-12-02 19:20:50,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:20:50,396 INFO L225 Difference]: With dead ends: 5194 [2023-12-02 19:20:50,396 INFO L226 Difference]: Without dead ends: 4003 [2023-12-02 19:20:50,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:20:50,402 INFO L413 NwaCegarLoop]: 3254 mSDtfsCounter, 3475 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3475 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 19:20:50,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3475 Valid, 3444 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 19:20:50,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4003 states. [2023-12-02 19:20:50,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4003 to 3993. [2023-12-02 19:20:50,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3993 states, 3611 states have (on average 1.6923289947382996) internal successors, (6111), 3621 states have internal predecessors, (6111), 284 states have call successors, (284), 96 states have call predecessors, (284), 96 states have return successors, (284), 276 states have call predecessors, (284), 284 states have call successors, (284) [2023-12-02 19:20:50,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3993 states to 3993 states and 6679 transitions. [2023-12-02 19:20:50,521 INFO L78 Accepts]: Start accepts. Automaton has 3993 states and 6679 transitions. Word has length 116 [2023-12-02 19:20:50,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:20:50,521 INFO L495 AbstractCegarLoop]: Abstraction has 3993 states and 6679 transitions. [2023-12-02 19:20:50,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 19:20:50,522 INFO L276 IsEmpty]: Start isEmpty. Operand 3993 states and 6679 transitions. [2023-12-02 19:20:50,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-12-02 19:20:50,528 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:20:50,528 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:20:50,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 19:20:50,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:20:50,729 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:20:50,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:20:50,729 INFO L85 PathProgramCache]: Analyzing trace with hash -635370791, now seen corresponding path program 1 times [2023-12-02 19:20:50,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:20:50,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059360926] [2023-12-02 19:20:50,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:20:50,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:20:50,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:20:50,890 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 19:20:50,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:20:50,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059360926] [2023-12-02 19:20:50,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059360926] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:20:50,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969121051] [2023-12-02 19:20:50,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:20:50,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:20:50,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:20:50,895 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:20:50,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 19:20:51,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:20:51,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 19:20:51,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:20:51,139 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-02 19:20:51,139 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:20:51,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969121051] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:20:51,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:20:51,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 19:20:51,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496914668] [2023-12-02 19:20:51,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:20:51,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:20:51,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:20:51,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:20:51,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:20:51,142 INFO L87 Difference]: Start difference. First operand 3993 states and 6679 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 19:20:51,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:20:51,692 INFO L93 Difference]: Finished difference Result 8638 states and 13572 transitions. [2023-12-02 19:20:51,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:20:51,693 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2023-12-02 19:20:51,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:20:51,734 INFO L225 Difference]: With dead ends: 8638 [2023-12-02 19:20:51,734 INFO L226 Difference]: Without dead ends: 6291 [2023-12-02 19:20:51,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:20:51,796 INFO L413 NwaCegarLoop]: 3254 mSDtfsCounter, 3484 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3484 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 19:20:51,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3484 Valid, 3444 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 19:20:51,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6291 states. [2023-12-02 19:20:52,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6291 to 6273. [2023-12-02 19:20:52,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6273 states, 5531 states have (on average 1.6009763153136864) internal successors, (8855), 5549 states have internal predecessors, (8855), 548 states have call successors, (548), 192 states have call predecessors, (548), 192 states have return successors, (548), 532 states have call predecessors, (548), 548 states have call successors, (548) [2023-12-02 19:20:52,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6273 states to 6273 states and 9951 transitions. [2023-12-02 19:20:52,037 INFO L78 Accepts]: Start accepts. Automaton has 6273 states and 9951 transitions. Word has length 116 [2023-12-02 19:20:52,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:20:52,037 INFO L495 AbstractCegarLoop]: Abstraction has 6273 states and 9951 transitions. [2023-12-02 19:20:52,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 19:20:52,038 INFO L276 IsEmpty]: Start isEmpty. Operand 6273 states and 9951 transitions. [2023-12-02 19:20:52,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-12-02 19:20:52,047 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:20:52,048 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:20:52,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 19:20:52,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:20:52,250 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:20:52,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:20:52,250 INFO L85 PathProgramCache]: Analyzing trace with hash -551811365, now seen corresponding path program 1 times [2023-12-02 19:20:52,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:20:52,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053661344] [2023-12-02 19:20:52,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:20:52,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:20:52,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:20:52,404 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 19:20:52,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:20:52,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053661344] [2023-12-02 19:20:52,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053661344] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:20:52,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534132659] [2023-12-02 19:20:52,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:20:52,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:20:52,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:20:52,406 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:20:52,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 19:20:52,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:20:52,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 19:20:52,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:20:52,664 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 19:20:52,664 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:20:52,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534132659] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:20:52,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:20:52,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 19:20:52,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089731605] [2023-12-02 19:20:52,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:20:52,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:20:52,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:20:52,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:20:52,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:20:52,666 INFO L87 Difference]: Start difference. First operand 6273 states and 9951 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 19:20:53,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:20:53,293 INFO L93 Difference]: Finished difference Result 15430 states and 23460 transitions. [2023-12-02 19:20:53,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:20:53,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2023-12-02 19:20:53,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:20:53,355 INFO L225 Difference]: With dead ends: 15430 [2023-12-02 19:20:53,355 INFO L226 Difference]: Without dead ends: 10803 [2023-12-02 19:20:53,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:20:53,373 INFO L413 NwaCegarLoop]: 3254 mSDtfsCounter, 3469 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3469 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 19:20:53,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3469 Valid, 3444 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 19:20:53,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10803 states. [2023-12-02 19:20:53,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10803 to 10769. [2023-12-02 19:20:53,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10769 states, 9323 states have (on average 1.5281561729057171) internal successors, (14247), 9357 states have internal predecessors, (14247), 1060 states have call successors, (1060), 384 states have call predecessors, (1060), 384 states have return successors, (1060), 1028 states have call predecessors, (1060), 1060 states have call successors, (1060) [2023-12-02 19:20:53,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10769 states to 10769 states and 16367 transitions. [2023-12-02 19:20:53,792 INFO L78 Accepts]: Start accepts. Automaton has 10769 states and 16367 transitions. Word has length 116 [2023-12-02 19:20:53,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:20:53,793 INFO L495 AbstractCegarLoop]: Abstraction has 10769 states and 16367 transitions. [2023-12-02 19:20:53,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 19:20:53,794 INFO L276 IsEmpty]: Start isEmpty. Operand 10769 states and 16367 transitions. [2023-12-02 19:20:53,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-12-02 19:20:53,812 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:20:53,812 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:20:53,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 19:20:54,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-02 19:20:54,013 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:20:54,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:20:54,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1523433241, now seen corresponding path program 1 times [2023-12-02 19:20:54,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:20:54,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252764796] [2023-12-02 19:20:54,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:20:54,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:20:54,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:20:54,130 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-02 19:20:54,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:20:54,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252764796] [2023-12-02 19:20:54,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252764796] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:20:54,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:20:54,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:20:54,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723639631] [2023-12-02 19:20:54,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:20:54,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:20:54,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:20:54,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:20:54,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:20:54,132 INFO L87 Difference]: Start difference. First operand 10769 states and 16367 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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) [2023-12-02 19:20:54,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:20:54,970 INFO L93 Difference]: Finished difference Result 18003 states and 27056 transitions. [2023-12-02 19:20:54,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:20:54,971 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 116 [2023-12-02 19:20:54,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:20:55,013 INFO L225 Difference]: With dead ends: 18003 [2023-12-02 19:20:55,013 INFO L226 Difference]: Without dead ends: 13361 [2023-12-02 19:20:55,025 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 [2023-12-02 19:20:55,026 INFO L413 NwaCegarLoop]: 3368 mSDtfsCounter, 109 mSDsluCounter, 3264 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 6632 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 19:20:55,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 6632 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 19:20:55,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13361 states. [2023-12-02 19:20:55,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13361 to 12673. [2023-12-02 19:20:55,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12673 states, 11163 states have (on average 1.5399982083669264) internal successors, (17191), 11197 states have internal predecessors, (17191), 1092 states have call successors, (1092), 416 states have call predecessors, (1092), 416 states have return successors, (1092), 1060 states have call predecessors, (1092), 1092 states have call successors, (1092) [2023-12-02 19:20:55,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12673 states to 12673 states and 19375 transitions. [2023-12-02 19:20:55,341 INFO L78 Accepts]: Start accepts. Automaton has 12673 states and 19375 transitions. Word has length 116 [2023-12-02 19:20:55,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:20:55,342 INFO L495 AbstractCegarLoop]: Abstraction has 12673 states and 19375 transitions. [2023-12-02 19:20:55,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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) [2023-12-02 19:20:55,342 INFO L276 IsEmpty]: Start isEmpty. Operand 12673 states and 19375 transitions. [2023-12-02 19:20:55,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-12-02 19:20:55,367 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:20:55,368 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 19:20:55,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 19:20:55,368 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:20:55,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:20:55,368 INFO L85 PathProgramCache]: Analyzing trace with hash -95596423, now seen corresponding path program 1 times [2023-12-02 19:20:55,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:20:55,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751965662] [2023-12-02 19:20:55,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:20:55,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:20:55,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:20:55,446 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-12-02 19:20:55,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:20:55,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751965662] [2023-12-02 19:20:55,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751965662] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:20:55,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:20:55,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:20:55,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565579121] [2023-12-02 19:20:55,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:20:55,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:20:55,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:20:55,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:20:55,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:20:55,448 INFO L87 Difference]: Start difference. First operand 12673 states and 19375 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2023-12-02 19:20:56,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:20:56,223 INFO L93 Difference]: Finished difference Result 34438 states and 51668 transitions. [2023-12-02 19:20:56,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:20:56,223 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 158 [2023-12-02 19:20:56,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:20:56,292 INFO L225 Difference]: With dead ends: 34438 [2023-12-02 19:20:56,292 INFO L226 Difference]: Without dead ends: 23411 [2023-12-02 19:20:56,323 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 [2023-12-02 19:20:56,324 INFO L413 NwaCegarLoop]: 3256 mSDtfsCounter, 3470 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3470 SdHoareTripleChecker+Valid, 3446 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 19:20:56,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3470 Valid, 3446 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 19:20:56,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23411 states. [2023-12-02 19:20:56,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23411 to 23313. [2023-12-02 19:20:56,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23313 states, 20363 states have (on average 1.4963905122035064) internal successors, (30471), 20429 states have internal predecessors, (30471), 2116 states have call successors, (2116), 832 states have call predecessors, (2116), 832 states have return successors, (2116), 2052 states have call predecessors, (2116), 2116 states have call successors, (2116) [2023-12-02 19:20:57,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23313 states to 23313 states and 34703 transitions. [2023-12-02 19:20:57,027 INFO L78 Accepts]: Start accepts. Automaton has 23313 states and 34703 transitions. Word has length 158 [2023-12-02 19:20:57,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:20:57,027 INFO L495 AbstractCegarLoop]: Abstraction has 23313 states and 34703 transitions. [2023-12-02 19:20:57,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2023-12-02 19:20:57,028 INFO L276 IsEmpty]: Start isEmpty. Operand 23313 states and 34703 transitions. [2023-12-02 19:20:57,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-12-02 19:20:57,186 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:20:57,186 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 19:20:57,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 19:20:57,187 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:20:57,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:20:57,187 INFO L85 PathProgramCache]: Analyzing trace with hash -382957950, now seen corresponding path program 1 times [2023-12-02 19:20:57,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:20:57,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581364975] [2023-12-02 19:20:57,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:20:57,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:20:57,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:20:57,336 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-12-02 19:20:57,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:20:57,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581364975] [2023-12-02 19:20:57,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581364975] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:20:57,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:20:57,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:20:57,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125080468] [2023-12-02 19:20:57,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:20:57,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:20:57,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:20:57,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:20:57,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:20:57,339 INFO L87 Difference]: Start difference. First operand 23313 states and 34703 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2023-12-02 19:20:58,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:20:58,807 INFO L93 Difference]: Finished difference Result 66070 states and 97684 transitions. [2023-12-02 19:20:58,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:20:58,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 158 [2023-12-02 19:20:58,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:20:58,964 INFO L225 Difference]: With dead ends: 66070 [2023-12-02 19:20:58,964 INFO L226 Difference]: Without dead ends: 44403 [2023-12-02 19:20:59,021 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 [2023-12-02 19:20:59,021 INFO L413 NwaCegarLoop]: 3256 mSDtfsCounter, 3472 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3472 SdHoareTripleChecker+Valid, 3446 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 19:20:59,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3472 Valid, 3446 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 19:20:59,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44403 states. [2023-12-02 19:21:00,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44403 to 44209. [2023-12-02 19:21:00,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44209 states, 38443 states have (on average 1.4668730328018105) internal successors, (56391), 38573 states have internal predecessors, (56391), 4100 states have call successors, (4100), 1664 states have call predecessors, (4100), 1664 states have return successors, (4100), 3972 states have call predecessors, (4100), 4100 states have call successors, (4100) [2023-12-02 19:21:00,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44209 states to 44209 states and 64591 transitions. [2023-12-02 19:21:00,357 INFO L78 Accepts]: Start accepts. Automaton has 44209 states and 64591 transitions. Word has length 158 [2023-12-02 19:21:00,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:21:00,357 INFO L495 AbstractCegarLoop]: Abstraction has 44209 states and 64591 transitions. [2023-12-02 19:21:00,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2023-12-02 19:21:00,357 INFO L276 IsEmpty]: Start isEmpty. Operand 44209 states and 64591 transitions. [2023-12-02 19:21:00,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-12-02 19:21:00,521 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:21:00,522 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 19:21:00,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 19:21:00,522 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:21:00,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:21:00,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1033622448, now seen corresponding path program 1 times [2023-12-02 19:21:00,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:21:00,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494216842] [2023-12-02 19:21:00,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:21:00,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:21:00,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:21:00,622 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-12-02 19:21:00,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:21:00,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494216842] [2023-12-02 19:21:00,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494216842] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:21:00,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:21:00,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:21:00,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670374409] [2023-12-02 19:21:00,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:21:00,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:21:00,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:21:00,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:21:00,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:21:00,625 INFO L87 Difference]: Start difference. First operand 44209 states and 64591 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2023-12-02 19:21:02,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:21:02,592 INFO L93 Difference]: Finished difference Result 128182 states and 187348 transitions. [2023-12-02 19:21:02,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:21:02,593 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 158 [2023-12-02 19:21:02,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:21:02,849 INFO L225 Difference]: With dead ends: 128182 [2023-12-02 19:21:02,849 INFO L226 Difference]: Without dead ends: 85619 [2023-12-02 19:21:02,940 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 [2023-12-02 19:21:02,941 INFO L413 NwaCegarLoop]: 3256 mSDtfsCounter, 3474 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3474 SdHoareTripleChecker+Valid, 3446 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 19:21:02,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3474 Valid, 3446 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 19:21:03,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85619 states. [2023-12-02 19:21:05,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85619 to 85233. [2023-12-02 19:21:05,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85233 states, 73963 states have (on average 1.4460067871773725) internal successors, (106951), 74221 states have internal predecessors, (106951), 7940 states have call successors, (7940), 3328 states have call predecessors, (7940), 3328 states have return successors, (7940), 7684 states have call predecessors, (7940), 7940 states have call successors, (7940) [2023-12-02 19:21:05,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85233 states to 85233 states and 122831 transitions. [2023-12-02 19:21:05,780 INFO L78 Accepts]: Start accepts. Automaton has 85233 states and 122831 transitions. Word has length 158 [2023-12-02 19:21:05,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:21:05,781 INFO L495 AbstractCegarLoop]: Abstraction has 85233 states and 122831 transitions. [2023-12-02 19:21:05,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2023-12-02 19:21:05,782 INFO L276 IsEmpty]: Start isEmpty. Operand 85233 states and 122831 transitions. [2023-12-02 19:21:05,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-12-02 19:21:05,930 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:21:05,930 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 19:21:05,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 19:21:05,930 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:21:05,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:21:05,931 INFO L85 PathProgramCache]: Analyzing trace with hash -801793274, now seen corresponding path program 1 times [2023-12-02 19:21:05,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:21:05,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383965786] [2023-12-02 19:21:05,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:21:05,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:21:06,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:21:06,261 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-12-02 19:21:06,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:21:06,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383965786] [2023-12-02 19:21:06,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383965786] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:21:06,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:21:06,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:21:06,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395093098] [2023-12-02 19:21:06,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:21:06,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:21:06,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:21:06,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:21:06,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:21:06,263 INFO L87 Difference]: Start difference. First operand 85233 states and 122831 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2023-12-02 19:21:10,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:21:10,449 INFO L93 Difference]: Finished difference Result 250102 states and 361940 transitions. [2023-12-02 19:21:10,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:21:10,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 158 [2023-12-02 19:21:10,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:21:10,882 INFO L225 Difference]: With dead ends: 250102 [2023-12-02 19:21:10,882 INFO L226 Difference]: Without dead ends: 166515 [2023-12-02 19:21:11,005 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 [2023-12-02 19:21:11,006 INFO L413 NwaCegarLoop]: 3264 mSDtfsCounter, 3477 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3477 SdHoareTripleChecker+Valid, 3454 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 19:21:11,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3477 Valid, 3454 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 19:21:11,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166515 states. [2023-12-02 19:21:15,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166515 to 165745. [2023-12-02 19:21:15,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165745 states, 143723 states have (on average 1.429910313589335) internal successors, (205511), 144237 states have internal predecessors, (205511), 15364 states have call successors, (15364), 6656 states have call predecessors, (15364), 6656 states have return successors, (15364), 14852 states have call predecessors, (15364), 15364 states have call successors, (15364) [2023-12-02 19:21:16,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165745 states to 165745 states and 236239 transitions. [2023-12-02 19:21:16,365 INFO L78 Accepts]: Start accepts. Automaton has 165745 states and 236239 transitions. Word has length 158 [2023-12-02 19:21:16,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:21:16,365 INFO L495 AbstractCegarLoop]: Abstraction has 165745 states and 236239 transitions. [2023-12-02 19:21:16,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2023-12-02 19:21:16,366 INFO L276 IsEmpty]: Start isEmpty. Operand 165745 states and 236239 transitions. [2023-12-02 19:21:16,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-12-02 19:21:16,727 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:21:16,727 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:21:16,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 19:21:16,728 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:21:16,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:21:16,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1925955906, now seen corresponding path program 1 times [2023-12-02 19:21:16,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:21:16,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070401701] [2023-12-02 19:21:16,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:21:16,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:21:16,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:21:17,685 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 12 proven. 62 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-12-02 19:21:17,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:21:17,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070401701] [2023-12-02 19:21:17,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070401701] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:21:17,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867200236] [2023-12-02 19:21:17,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:21:17,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:21:17,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:21:17,687 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:21:17,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 19:21:17,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:21:17,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 1208 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 19:21:17,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:21:18,290 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 88 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 19:21:18,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:21:18,817 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 13 proven. 62 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-12-02 19:21:18,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867200236] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:21:18,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1696639387] [2023-12-02 19:21:18,844 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2023-12-02 19:21:18,844 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:21:18,848 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:21:18,853 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:21:18,854 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:21:35,691 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 211 for LOIs [2023-12-02 19:21:35,878 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 231 for LOIs [2023-12-02 19:21:36,115 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 1 for LOIs [2023-12-02 19:21:36,116 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 1 for LOIs [2023-12-02 19:21:36,158 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 61 for LOIs [2023-12-02 19:21:36,294 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 1 for LOIs [2023-12-02 19:21:36,570 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:21:50,274 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1070677#(and (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (not (= (+ 9 ~local~0) ~token~0)) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= ~m_pc~0 1) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (= ~m_st~0 1) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|))' at error location [2023-12-02 19:21:50,274 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:21:50,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:21:50,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 13 [2023-12-02 19:21:50,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855128154] [2023-12-02 19:21:50,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:21:50,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 19:21:50,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:21:50,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 19:21:50,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=609, Invalid=6531, Unknown=0, NotChecked=0, Total=7140 [2023-12-02 19:21:50,279 INFO L87 Difference]: Start difference. First operand 165745 states and 236239 transitions. Second operand has 13 states, 13 states have (on average 19.615384615384617) internal successors, (255), 13 states have internal predecessors, (255), 8 states have call successors, (35), 7 states have call predecessors, (35), 8 states have return successors, (35), 8 states have call predecessors, (35), 8 states have call successors, (35) [2023-12-02 19:22:02,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:22:02,716 INFO L93 Difference]: Finished difference Result 578809 states and 824787 transitions. [2023-12-02 19:22:02,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-02 19:22:02,716 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 19.615384615384617) internal successors, (255), 13 states have internal predecessors, (255), 8 states have call successors, (35), 7 states have call predecessors, (35), 8 states have return successors, (35), 8 states have call predecessors, (35), 8 states have call successors, (35) Word has length 178 [2023-12-02 19:22:02,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:22:04,224 INFO L225 Difference]: With dead ends: 578809 [2023-12-02 19:22:04,224 INFO L226 Difference]: Without dead ends: 414711 [2023-12-02 19:22:04,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 471 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4090 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=991, Invalid=10781, Unknown=0, NotChecked=0, Total=11772 [2023-12-02 19:22:04,496 INFO L413 NwaCegarLoop]: 3312 mSDtfsCounter, 12591 mSDsluCounter, 16494 mSDsCounter, 0 mSdLazyCounter, 2002 mSolverCounterSat, 607 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12591 SdHoareTripleChecker+Valid, 19806 SdHoareTripleChecker+Invalid, 2609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 607 IncrementalHoareTripleChecker+Valid, 2002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-02 19:22:04,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12591 Valid, 19806 Invalid, 2609 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [607 Valid, 2002 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-02 19:22:04,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414711 states. [2023-12-02 19:22:18,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414711 to 362609. [2023-12-02 19:22:18,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362609 states, 313835 states have (on average 1.4101900680293784) internal successors, (442567), 314989 states have internal predecessors, (442567), 33796 states have call successors, (33796), 14976 states have call predecessors, (33796), 14976 states have return successors, (33796), 32644 states have call predecessors, (33796), 33796 states have call successors, (33796) [2023-12-02 19:22:20,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362609 states to 362609 states and 510159 transitions. [2023-12-02 19:22:20,234 INFO L78 Accepts]: Start accepts. Automaton has 362609 states and 510159 transitions. Word has length 178 [2023-12-02 19:22:20,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:22:20,234 INFO L495 AbstractCegarLoop]: Abstraction has 362609 states and 510159 transitions. [2023-12-02 19:22:20,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 19.615384615384617) internal successors, (255), 13 states have internal predecessors, (255), 8 states have call successors, (35), 7 states have call predecessors, (35), 8 states have return successors, (35), 8 states have call predecessors, (35), 8 states have call successors, (35) [2023-12-02 19:22:20,235 INFO L276 IsEmpty]: Start isEmpty. Operand 362609 states and 510159 transitions. [2023-12-02 19:22:21,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2023-12-02 19:22:21,082 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:22:21,083 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:22:21,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 19:22:21,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 19:22:21,284 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:22:21,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:22:21,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1187483478, now seen corresponding path program 1 times [2023-12-02 19:22:21,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:22:21,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930706696] [2023-12-02 19:22:21,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:22:21,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:22:21,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:22:22,285 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 18 proven. 63 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-12-02 19:22:22,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:22:22,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930706696] [2023-12-02 19:22:22,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930706696] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:22:22,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348391295] [2023-12-02 19:22:22,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:22:22,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:22:22,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:22:22,287 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:22:22,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 19:22:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:22:22,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 19:22:22,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:22:22,533 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 19:22:22,533 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:22:22,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348391295] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:22:22,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:22:22,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 19:22:22,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687248639] [2023-12-02 19:22:22,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:22:22,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:22:22,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:22:22,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:22:22,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 19:22:22,535 INFO L87 Difference]: Start difference. First operand 362609 states and 510159 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 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) [2023-12-02 19:22:37,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:22:37,537 INFO L93 Difference]: Finished difference Result 695157 states and 985169 transitions. [2023-12-02 19:22:37,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:22:37,538 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 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 186 [2023-12-02 19:22:37,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:22:39,283 INFO L225 Difference]: With dead ends: 695157 [2023-12-02 19:22:39,283 INFO L226 Difference]: Without dead ends: 512083 [2023-12-02 19:22:39,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 19:22:39,673 INFO L413 NwaCegarLoop]: 3412 mSDtfsCounter, 162 mSDsluCounter, 3266 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 6678 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 19:22:39,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 6678 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 19:22:40,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512083 states. [2023-12-02 19:22:55,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512083 to 449297. [2023-12-02 19:22:56,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449297 states, 397067 states have (on average 1.4351809644216216) internal successors, (569863), 398221 states have internal predecessors, (569863), 35524 states have call successors, (35524), 16704 states have call predecessors, (35524), 16704 states have return successors, (35524), 34372 states have call predecessors, (35524), 35524 states have call successors, (35524) [2023-12-02 19:22:57,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449297 states to 449297 states and 640911 transitions. [2023-12-02 19:22:57,845 INFO L78 Accepts]: Start accepts. Automaton has 449297 states and 640911 transitions. Word has length 186 [2023-12-02 19:22:57,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:22:57,846 INFO L495 AbstractCegarLoop]: Abstraction has 449297 states and 640911 transitions. [2023-12-02 19:22:57,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 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) [2023-12-02 19:22:57,846 INFO L276 IsEmpty]: Start isEmpty. Operand 449297 states and 640911 transitions. [2023-12-02 19:22:58,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2023-12-02 19:22:58,560 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:22:58,560 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:22:58,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 19:22:58,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 19:22:58,761 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:22:58,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:22:58,761 INFO L85 PathProgramCache]: Analyzing trace with hash 743884235, now seen corresponding path program 2 times [2023-12-02 19:22:58,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:22:58,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408544737] [2023-12-02 19:22:58,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:22:58,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:22:59,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:22:59,552 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-12-02 19:22:59,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:22:59,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408544737] [2023-12-02 19:22:59,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408544737] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:22:59,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861232203] [2023-12-02 19:22:59,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:22:59,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:22:59,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:22:59,554 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:22:59,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab31780d-71cf-4f22-b263-6e30d4660039/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 19:22:59,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 19:22:59,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:22:59,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 1022 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 19:22:59,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:22:59,958 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 93 proven. 22 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 19:22:59,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:23:00,314 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 26 proven. 64 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-12-02 19:23:00,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861232203] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:23:00,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1793319749] [2023-12-02 19:23:00,319 INFO L159 IcfgInterpreter]: Started Sifa with 91 locations of interest [2023-12-02 19:23:00,319 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:23:00,319 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:23:00,319 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:23:00,320 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:23:42,582 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 228 for LOIs [2023-12-02 19:23:42,852 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 21