./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta --witnessprinter.witness.filename witness.graphml --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 0d12edbd4df2f08d75221f3c96b68e50e6394815b34a699d313e71ea24bf9c38 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 17:39:30,631 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:39:30,634 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:39:30,667 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:39:30,668 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:39:30,669 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:39:30,671 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:39:30,673 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:39:30,676 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:39:30,677 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:39:30,678 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:39:30,680 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:39:30,680 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:39:30,682 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:39:30,683 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:39:30,685 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:39:30,686 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:39:30,688 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:39:30,690 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:39:30,692 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:39:30,694 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:39:30,696 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:39:30,698 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:39:30,699 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:39:30,704 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:39:30,704 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:39:30,705 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:39:30,706 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:39:30,707 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:39:30,708 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:39:30,708 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:39:30,710 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:39:30,711 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:39:30,712 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:39:30,713 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:39:30,713 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:39:30,714 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:39:30,715 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:39:30,715 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:39:30,716 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:39:30,717 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:39:30,718 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:39:30,744 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:39:30,745 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:39:30,745 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:39:30,746 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:39:30,746 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:39:30,747 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:39:30,747 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:39:30,747 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:39:30,747 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:39:30,748 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:39:30,748 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:39:30,748 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:39:30,748 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:39:30,748 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:39:30,749 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:39:30,749 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:39:30,749 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:39:30,750 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:39:30,750 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:39:30,751 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:39:30,751 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:39:30,751 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:39:30,751 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:39:30,752 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:39:30,752 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:39:30,752 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:39:30,752 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:39:30,753 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:39:30,753 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:39:30,753 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:39:30,753 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:39:30,754 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:39:30,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:39:30,754 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:39:30,754 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:39:30,755 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:39:30,755 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:39:30,755 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:39:30,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:39:30,756 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:39:30,756 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:39:30,756 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d12edbd4df2f08d75221f3c96b68e50e6394815b34a699d313e71ea24bf9c38 [2022-10-17 17:39:30,996 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:39:31,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:39:31,041 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:39:31,042 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:39:31,046 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:39:31,047 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c [2022-10-17 17:39:31,130 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/data/30ffded96/b038e5db219a4e6b86c89dbea165316f/FLAG66f96c6f3 [2022-10-17 17:39:31,792 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:39:31,792 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c [2022-10-17 17:39:31,826 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/data/30ffded96/b038e5db219a4e6b86c89dbea165316f/FLAG66f96c6f3 [2022-10-17 17:39:32,006 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/data/30ffded96/b038e5db219a4e6b86c89dbea165316f [2022-10-17 17:39:32,010 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:39:32,012 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:39:32,014 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:39:32,014 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:39:32,021 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:39:32,023 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:39:32" (1/1) ... [2022-10-17 17:39:32,026 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52e11974 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:32, skipping insertion in model container [2022-10-17 17:39:32,027 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:39:32" (1/1) ... [2022-10-17 17:39:32,035 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:39:32,107 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:39:32,620 WARN L230 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_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c[40506,40519] [2022-10-17 17:39:32,750 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:39:32,770 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:39:32,879 WARN L230 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_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c[40506,40519] [2022-10-17 17:39:32,921 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:39:32,973 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:39:32,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:32 WrapperNode [2022-10-17 17:39:32,974 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:39:32,975 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:39:32,975 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:39:32,975 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:39:32,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:32" (1/1) ... [2022-10-17 17:39:33,049 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:32" (1/1) ... [2022-10-17 17:39:33,114 INFO L138 Inliner]: procedures = 91, calls = 347, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 928 [2022-10-17 17:39:33,114 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:39:33,115 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:39:33,115 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:39:33,116 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:39:33,125 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:32" (1/1) ... [2022-10-17 17:39:33,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:32" (1/1) ... [2022-10-17 17:39:33,133 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:32" (1/1) ... [2022-10-17 17:39:33,133 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:32" (1/1) ... [2022-10-17 17:39:33,194 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:32" (1/1) ... [2022-10-17 17:39:33,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:32" (1/1) ... [2022-10-17 17:39:33,256 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:32" (1/1) ... [2022-10-17 17:39:33,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:32" (1/1) ... [2022-10-17 17:39:33,270 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:39:33,270 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:39:33,271 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:39:33,271 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:39:33,276 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:32" (1/1) ... [2022-10-17 17:39:33,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:39:33,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:39:33,315 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:39:33,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:39:33,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:39:33,370 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-10-17 17:39:33,370 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-10-17 17:39:33,371 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-10-17 17:39:33,371 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-10-17 17:39:33,371 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-10-17 17:39:33,371 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-10-17 17:39:33,371 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-10-17 17:39:33,371 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-10-17 17:39:33,371 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-10-17 17:39:33,372 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-10-17 17:39:33,372 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-10-17 17:39:33,372 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-10-17 17:39:33,372 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-10-17 17:39:33,372 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-10-17 17:39:33,372 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-10-17 17:39:33,372 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-10-17 17:39:33,373 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-10-17 17:39:33,373 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-10-17 17:39:33,373 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-10-17 17:39:33,373 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-10-17 17:39:33,373 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-10-17 17:39:33,373 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-10-17 17:39:33,373 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-10-17 17:39:33,374 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-10-17 17:39:33,374 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-10-17 17:39:33,374 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-10-17 17:39:33,374 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-10-17 17:39:33,374 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-10-17 17:39:33,374 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-10-17 17:39:33,374 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-10-17 17:39:33,375 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-10-17 17:39:33,375 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-10-17 17:39:33,375 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-10-17 17:39:33,375 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-10-17 17:39:33,376 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-10-17 17:39:33,376 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-10-17 17:39:33,376 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-10-17 17:39:33,376 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-10-17 17:39:33,376 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-10-17 17:39:33,377 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-10-17 17:39:33,377 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-10-17 17:39:33,377 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-10-17 17:39:33,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:39:33,378 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-10-17 17:39:33,378 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-10-17 17:39:33,379 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-10-17 17:39:33,380 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-10-17 17:39:33,380 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-10-17 17:39:33,381 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-10-17 17:39:33,381 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-10-17 17:39:33,381 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-10-17 17:39:33,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:39:33,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:39:33,382 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-10-17 17:39:33,382 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-10-17 17:39:33,584 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:39:33,586 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:39:35,063 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:39:36,034 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:39:36,034 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-17 17:39:36,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:39:36 BoogieIcfgContainer [2022-10-17 17:39:36,040 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:39:36,045 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:39:36,045 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:39:36,051 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:39:36,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:39:32" (1/3) ... [2022-10-17 17:39:36,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33d9dd10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:39:36, skipping insertion in model container [2022-10-17 17:39:36,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:32" (2/3) ... [2022-10-17 17:39:36,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33d9dd10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:39:36, skipping insertion in model container [2022-10-17 17:39:36,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:39:36" (3/3) ... [2022-10-17 17:39:36,056 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product29.cil.c [2022-10-17 17:39:36,077 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:39:36,077 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:39:36,176 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:39:36,193 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=LoopsAndPotentialCycles, 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;@ebf3402, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:39:36,193 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:39:36,204 INFO L276 IsEmpty]: Start isEmpty. Operand has 404 states, 270 states have (on average 1.5740740740740742) internal successors, (425), 288 states have internal predecessors, (425), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) [2022-10-17 17:39:36,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-10-17 17:39:36,241 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:39:36,242 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:39:36,242 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:39:36,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:39:36,253 INFO L85 PathProgramCache]: Analyzing trace with hash -414763503, now seen corresponding path program 1 times [2022-10-17 17:39:36,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:39:36,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009643628] [2022-10-17 17:39:36,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:36,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:39:36,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:37,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:39:37,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:39:37,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009643628] [2022-10-17 17:39:37,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009643628] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:39:37,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:39:37,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:39:37,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641426289] [2022-10-17 17:39:37,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:39:37,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:39:37,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:39:37,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:39:37,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:39:37,545 INFO L87 Difference]: Start difference. First operand has 404 states, 270 states have (on average 1.5740740740740742) internal successors, (425), 288 states have internal predecessors, (425), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) Second operand has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-10-17 17:39:38,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:39:38,859 INFO L93 Difference]: Finished difference Result 1150 states and 1839 transitions. [2022-10-17 17:39:38,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 17:39:38,863 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2022-10-17 17:39:38,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:39:38,907 INFO L225 Difference]: With dead ends: 1150 [2022-10-17 17:39:38,910 INFO L226 Difference]: Without dead ends: 748 [2022-10-17 17:39:38,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-10-17 17:39:38,936 INFO L413 NwaCegarLoop]: 654 mSDtfsCounter, 545 mSDsluCounter, 2489 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 2990 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:39:38,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [548 Valid, 2990 Invalid, 928 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [159 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-10-17 17:39:38,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-10-17 17:39:39,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 740. [2022-10-17 17:39:39,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 497 states have (on average 1.5010060362173039) internal successors, (746), 527 states have internal predecessors, (746), 196 states have call successors, (196), 49 states have call predecessors, (196), 46 states have return successors, (197), 188 states have call predecessors, (197), 192 states have call successors, (197) [2022-10-17 17:39:39,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1139 transitions. [2022-10-17 17:39:39,133 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1139 transitions. Word has length 75 [2022-10-17 17:39:39,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:39:39,140 INFO L495 AbstractCegarLoop]: Abstraction has 740 states and 1139 transitions. [2022-10-17 17:39:39,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-10-17 17:39:39,141 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1139 transitions. [2022-10-17 17:39:39,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-10-17 17:39:39,151 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:39:39,152 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:39:39,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:39:39,153 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:39:39,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:39:39,154 INFO L85 PathProgramCache]: Analyzing trace with hash -415147964, now seen corresponding path program 1 times [2022-10-17 17:39:39,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:39:39,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781674177] [2022-10-17 17:39:39,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:39,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:39:39,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:39,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:39:39,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:39:39,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781674177] [2022-10-17 17:39:39,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781674177] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:39:39,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:39:39,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:39:39,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325275719] [2022-10-17 17:39:39,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:39:39,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:39:39,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:39:39,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:39:39,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:39:39,807 INFO L87 Difference]: Start difference. First operand 740 states and 1139 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2022-10-17 17:39:40,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:39:40,917 INFO L93 Difference]: Finished difference Result 2669 states and 4283 transitions. [2022-10-17 17:39:40,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 17:39:40,919 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) Word has length 80 [2022-10-17 17:39:40,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:39:40,944 INFO L225 Difference]: With dead ends: 2669 [2022-10-17 17:39:40,945 INFO L226 Difference]: Without dead ends: 1941 [2022-10-17 17:39:40,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-10-17 17:39:40,961 INFO L413 NwaCegarLoop]: 922 mSDtfsCounter, 847 mSDsluCounter, 3249 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 920 SdHoareTripleChecker+Valid, 4034 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-10-17 17:39:40,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [920 Valid, 4034 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-10-17 17:39:40,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1941 states. [2022-10-17 17:39:41,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1941 to 1387. [2022-10-17 17:39:41,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1387 states, 949 states have (on average 1.5047418335089568) internal successors, (1428), 1007 states have internal predecessors, (1428), 351 states have call successors, (351), 91 states have call predecessors, (351), 86 states have return successors, (380), 326 states have call predecessors, (380), 345 states have call successors, (380) [2022-10-17 17:39:41,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1387 states to 1387 states and 2159 transitions. [2022-10-17 17:39:41,130 INFO L78 Accepts]: Start accepts. Automaton has 1387 states and 2159 transitions. Word has length 80 [2022-10-17 17:39:41,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:39:41,132 INFO L495 AbstractCegarLoop]: Abstraction has 1387 states and 2159 transitions. [2022-10-17 17:39:41,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2022-10-17 17:39:41,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1387 states and 2159 transitions. [2022-10-17 17:39:41,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-10-17 17:39:41,135 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:39:41,136 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:39:41,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:39:41,136 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:39:41,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:39:41,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1728178894, now seen corresponding path program 1 times [2022-10-17 17:39:41,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:39:41,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620200186] [2022-10-17 17:39:41,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:41,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:39:41,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:41,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:39:41,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:39:41,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620200186] [2022-10-17 17:39:41,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620200186] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:39:41,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848584595] [2022-10-17 17:39:41,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:41,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:39:41,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:39:41,565 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:39:41,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:39:41,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:41,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 1581 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 17:39:41,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:39:42,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:39:42,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:39:42,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848584595] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:39:42,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:39:42,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-10-17 17:39:42,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735687831] [2022-10-17 17:39:42,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:39:42,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:39:42,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:39:42,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:39:42,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:39:42,038 INFO L87 Difference]: Start difference. First operand 1387 states and 2159 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-10-17 17:39:42,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:39:42,365 INFO L93 Difference]: Finished difference Result 3959 states and 6319 transitions. [2022-10-17 17:39:42,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:39:42,366 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 79 [2022-10-17 17:39:42,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:39:42,398 INFO L225 Difference]: With dead ends: 3959 [2022-10-17 17:39:42,399 INFO L226 Difference]: Without dead ends: 2584 [2022-10-17 17:39:42,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:39:42,416 INFO L413 NwaCegarLoop]: 674 mSDtfsCounter, 562 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:39:42,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [562 Valid, 1173 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:39:42,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2022-10-17 17:39:42,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 2509. [2022-10-17 17:39:42,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2509 states, 1727 states have (on average 1.5176606832657789) internal successors, (2621), 1843 states have internal predecessors, (2621), 620 states have call successors, (620), 162 states have call predecessors, (620), 161 states have return successors, (700), 579 states have call predecessors, (700), 614 states have call successors, (700) [2022-10-17 17:39:42,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2509 states to 2509 states and 3941 transitions. [2022-10-17 17:39:42,688 INFO L78 Accepts]: Start accepts. Automaton has 2509 states and 3941 transitions. Word has length 79 [2022-10-17 17:39:42,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:39:42,690 INFO L495 AbstractCegarLoop]: Abstraction has 2509 states and 3941 transitions. [2022-10-17 17:39:42,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-10-17 17:39:42,690 INFO L276 IsEmpty]: Start isEmpty. Operand 2509 states and 3941 transitions. [2022-10-17 17:39:42,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-10-17 17:39:42,698 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:39:42,698 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:39:42,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:39:42,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:39:42,926 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:39:42,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:39:42,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1342972250, now seen corresponding path program 1 times [2022-10-17 17:39:42,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:39:42,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870638056] [2022-10-17 17:39:42,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:42,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:39:42,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:43,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:39:43,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:39:43,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870638056] [2022-10-17 17:39:43,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870638056] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:39:43,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886678438] [2022-10-17 17:39:43,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:43,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:39:43,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:39:43,300 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:39:43,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 17:39:43,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:43,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 1582 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 17:39:43,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:39:43,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:39:43,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:39:43,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886678438] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:39:43,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:39:43,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-10-17 17:39:43,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511178786] [2022-10-17 17:39:43,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:39:43,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:39:43,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:39:43,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:39:43,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:39:43,714 INFO L87 Difference]: Start difference. First operand 2509 states and 3941 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-10-17 17:39:44,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:39:44,152 INFO L93 Difference]: Finished difference Result 5622 states and 8926 transitions. [2022-10-17 17:39:44,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:39:44,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 81 [2022-10-17 17:39:44,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:39:44,185 INFO L225 Difference]: With dead ends: 5622 [2022-10-17 17:39:44,186 INFO L226 Difference]: Without dead ends: 3125 [2022-10-17 17:39:44,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:39:44,210 INFO L413 NwaCegarLoop]: 677 mSDtfsCounter, 559 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:39:44,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 1173 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:39:44,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3125 states. [2022-10-17 17:39:44,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3125 to 3082. [2022-10-17 17:39:44,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3082 states, 2129 states have (on average 1.5274776890558948) internal successors, (3252), 2274 states have internal predecessors, (3252), 755 states have call successors, (755), 196 states have call predecessors, (755), 197 states have return successors, (854), 707 states have call predecessors, (854), 749 states have call successors, (854) [2022-10-17 17:39:44,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3082 states to 3082 states and 4861 transitions. [2022-10-17 17:39:44,450 INFO L78 Accepts]: Start accepts. Automaton has 3082 states and 4861 transitions. Word has length 81 [2022-10-17 17:39:44,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:39:44,451 INFO L495 AbstractCegarLoop]: Abstraction has 3082 states and 4861 transitions. [2022-10-17 17:39:44,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-10-17 17:39:44,452 INFO L276 IsEmpty]: Start isEmpty. Operand 3082 states and 4861 transitions. [2022-10-17 17:39:44,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-10-17 17:39:44,456 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:39:44,457 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:39:44,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 17:39:44,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:39:44,671 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:39:44,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:39:44,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1934255269, now seen corresponding path program 1 times [2022-10-17 17:39:44,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:39:44,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595689476] [2022-10-17 17:39:44,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:44,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:39:44,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:45,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:39:45,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:39:45,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595689476] [2022-10-17 17:39:45,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595689476] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:39:45,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904360028] [2022-10-17 17:39:45,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:45,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:39:45,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:39:45,386 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:39:45,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 17:39:45,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:45,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 1609 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 17:39:45,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:39:45,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:39:45,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:39:45,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904360028] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:39:45,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:39:45,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-10-17 17:39:45,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334025174] [2022-10-17 17:39:45,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:39:45,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:39:45,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:39:45,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:39:45,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-10-17 17:39:45,846 INFO L87 Difference]: Start difference. First operand 3082 states and 4861 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-10-17 17:39:46,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:39:46,423 INFO L93 Difference]: Finished difference Result 6167 states and 9944 transitions. [2022-10-17 17:39:46,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:39:46,424 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 87 [2022-10-17 17:39:46,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:39:46,462 INFO L225 Difference]: With dead ends: 6167 [2022-10-17 17:39:46,462 INFO L226 Difference]: Without dead ends: 3902 [2022-10-17 17:39:46,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-10-17 17:39:46,487 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 210 mSDsluCounter, 1889 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 2430 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 17:39:46,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 2430 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 17:39:46,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3902 states. [2022-10-17 17:39:46,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3902 to 3286. [2022-10-17 17:39:46,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3286 states, 2271 states have (on average 1.520035226772347) internal successors, (3452), 2437 states have internal predecessors, (3452), 814 states have call successors, (814), 196 states have call predecessors, (814), 200 states have return successors, (925), 766 states have call predecessors, (925), 808 states have call successors, (925) [2022-10-17 17:39:46,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3286 states to 3286 states and 5191 transitions. [2022-10-17 17:39:46,941 INFO L78 Accepts]: Start accepts. Automaton has 3286 states and 5191 transitions. Word has length 87 [2022-10-17 17:39:46,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:39:46,941 INFO L495 AbstractCegarLoop]: Abstraction has 3286 states and 5191 transitions. [2022-10-17 17:39:46,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-10-17 17:39:46,942 INFO L276 IsEmpty]: Start isEmpty. Operand 3286 states and 5191 transitions. [2022-10-17 17:39:46,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-10-17 17:39:46,946 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:39:46,946 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:39:46,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 17:39:47,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:39:47,162 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:39:47,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:39:47,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1975805511, now seen corresponding path program 1 times [2022-10-17 17:39:47,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:39:47,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530653297] [2022-10-17 17:39:47,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:47,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:39:47,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:47,964 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-17 17:39:47,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:39:47,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530653297] [2022-10-17 17:39:47,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530653297] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:39:47,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680297742] [2022-10-17 17:39:47,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:47,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:39:47,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:39:47,970 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:39:47,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 17:39:48,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:48,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 1614 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-17 17:39:48,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:39:48,516 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-17 17:39:48,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:39:48,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680297742] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:39:48,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:39:48,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-10-17 17:39:48,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931418982] [2022-10-17 17:39:48,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:39:48,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 17:39:48,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:39:48,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 17:39:48,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-10-17 17:39:48,519 INFO L87 Difference]: Start difference. First operand 3286 states and 5191 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2022-10-17 17:39:49,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:39:49,582 INFO L93 Difference]: Finished difference Result 5778 states and 9149 transitions. [2022-10-17 17:39:49,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 17:39:49,583 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 89 [2022-10-17 17:39:49,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:39:49,617 INFO L225 Difference]: With dead ends: 5778 [2022-10-17 17:39:49,617 INFO L226 Difference]: Without dead ends: 3325 [2022-10-17 17:39:49,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-10-17 17:39:49,641 INFO L413 NwaCegarLoop]: 721 mSDtfsCounter, 519 mSDsluCounter, 1777 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 2356 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-17 17:39:49,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 2356 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-17 17:39:49,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3325 states. [2022-10-17 17:39:49,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3325 to 3322. [2022-10-17 17:39:49,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3322 states, 2295 states have (on average 1.5145969498910676) internal successors, (3476), 2457 states have internal predecessors, (3476), 814 states have call successors, (814), 200 states have call predecessors, (814), 212 states have return successors, (941), 778 states have call predecessors, (941), 808 states have call successors, (941) [2022-10-17 17:39:49,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3322 states to 3322 states and 5231 transitions. [2022-10-17 17:39:49,999 INFO L78 Accepts]: Start accepts. Automaton has 3322 states and 5231 transitions. Word has length 89 [2022-10-17 17:39:50,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:39:50,000 INFO L495 AbstractCegarLoop]: Abstraction has 3322 states and 5231 transitions. [2022-10-17 17:39:50,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2022-10-17 17:39:50,000 INFO L276 IsEmpty]: Start isEmpty. Operand 3322 states and 5231 transitions. [2022-10-17 17:39:50,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-10-17 17:39:50,006 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:39:50,006 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:39:50,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 17:39:50,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-10-17 17:39:50,230 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:39:50,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:39:50,230 INFO L85 PathProgramCache]: Analyzing trace with hash 896215998, now seen corresponding path program 1 times [2022-10-17 17:39:50,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:39:50,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938865977] [2022-10-17 17:39:50,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:50,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:39:50,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:50,952 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-17 17:39:50,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:39:50,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938865977] [2022-10-17 17:39:50,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938865977] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:39:50,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819451490] [2022-10-17 17:39:50,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:50,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:39:50,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:39:50,958 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:39:50,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 17:39:51,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:51,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 1613 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-17 17:39:51,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:39:51,332 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-17 17:39:51,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:39:51,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819451490] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:39:51,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:39:51,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2022-10-17 17:39:51,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092823134] [2022-10-17 17:39:51,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:39:51,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:39:51,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:39:51,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:39:51,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-10-17 17:39:51,336 INFO L87 Difference]: Start difference. First operand 3322 states and 5231 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-10-17 17:39:51,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:39:51,914 INFO L93 Difference]: Finished difference Result 6163 states and 9951 transitions. [2022-10-17 17:39:51,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:39:51,915 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 92 [2022-10-17 17:39:51,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:39:51,952 INFO L225 Difference]: With dead ends: 6163 [2022-10-17 17:39:51,952 INFO L226 Difference]: Without dead ends: 3674 [2022-10-17 17:39:51,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-10-17 17:39:51,988 INFO L413 NwaCegarLoop]: 630 mSDtfsCounter, 219 mSDsluCounter, 1036 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1594 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:39:51,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 1594 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:39:51,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3674 states. [2022-10-17 17:39:52,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3674 to 3674. [2022-10-17 17:39:52,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3674 states, 2637 states have (on average 1.5297686765263556) internal successors, (4034), 2809 states have internal predecessors, (4034), 814 states have call successors, (814), 200 states have call predecessors, (814), 222 states have return successors, (971), 778 states have call predecessors, (971), 808 states have call successors, (971) [2022-10-17 17:39:52,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3674 states to 3674 states and 5819 transitions. [2022-10-17 17:39:52,400 INFO L78 Accepts]: Start accepts. Automaton has 3674 states and 5819 transitions. Word has length 92 [2022-10-17 17:39:52,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:39:52,402 INFO L495 AbstractCegarLoop]: Abstraction has 3674 states and 5819 transitions. [2022-10-17 17:39:52,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-10-17 17:39:52,403 INFO L276 IsEmpty]: Start isEmpty. Operand 3674 states and 5819 transitions. [2022-10-17 17:39:52,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-10-17 17:39:52,408 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:39:52,408 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:39:52,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 17:39:52,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:39:52,634 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:39:52,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:39:52,634 INFO L85 PathProgramCache]: Analyzing trace with hash 2022107844, now seen corresponding path program 1 times [2022-10-17 17:39:52,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:39:52,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472091907] [2022-10-17 17:39:52,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:52,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:39:52,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:53,315 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-17 17:39:53,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:39:53,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472091907] [2022-10-17 17:39:53,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472091907] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:39:53,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864057247] [2022-10-17 17:39:53,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:53,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:39:53,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:39:53,318 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:39:53,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 17:39:53,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:53,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 1613 conjuncts, 17 conjunts are in the unsatisfiable core [2022-10-17 17:39:53,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:39:53,919 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-17 17:39:53,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:39:54,260 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-17 17:39:54,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864057247] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-17 17:39:54,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-10-17 17:39:54,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 20 [2022-10-17 17:39:54,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204430949] [2022-10-17 17:39:54,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:39:54,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 17:39:54,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:39:54,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 17:39:54,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-10-17 17:39:54,264 INFO L87 Difference]: Start difference. First operand 3674 states and 5819 transitions. Second operand has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2022-10-17 17:39:58,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:39:58,529 INFO L93 Difference]: Finished difference Result 9688 states and 16293 transitions. [2022-10-17 17:39:58,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-10-17 17:39:58,530 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 91 [2022-10-17 17:39:58,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:39:58,592 INFO L225 Difference]: With dead ends: 9688 [2022-10-17 17:39:58,593 INFO L226 Difference]: Without dead ends: 7335 [2022-10-17 17:39:58,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 176 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2022-10-17 17:39:58,621 INFO L413 NwaCegarLoop]: 705 mSDtfsCounter, 3033 mSDsluCounter, 2247 mSDsCounter, 0 mSdLazyCounter, 2600 mSolverCounterSat, 1443 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3123 SdHoareTripleChecker+Valid, 2822 SdHoareTripleChecker+Invalid, 4043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1443 IncrementalHoareTripleChecker+Valid, 2600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:39:58,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3123 Valid, 2822 Invalid, 4043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1443 Valid, 2600 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-10-17 17:39:58,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7335 states. [2022-10-17 17:39:59,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7335 to 6840. [2022-10-17 17:39:59,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6840 states, 5049 states have (on average 1.5444642503466033) internal successors, (7798), 5313 states have internal predecessors, (7798), 1345 states have call successors, (1345), 378 states have call predecessors, (1345), 445 states have return successors, (1996), 1292 states have call predecessors, (1996), 1337 states have call successors, (1996) [2022-10-17 17:39:59,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6840 states to 6840 states and 11139 transitions. [2022-10-17 17:39:59,344 INFO L78 Accepts]: Start accepts. Automaton has 6840 states and 11139 transitions. Word has length 91 [2022-10-17 17:39:59,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:39:59,345 INFO L495 AbstractCegarLoop]: Abstraction has 6840 states and 11139 transitions. [2022-10-17 17:39:59,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2022-10-17 17:39:59,345 INFO L276 IsEmpty]: Start isEmpty. Operand 6840 states and 11139 transitions. [2022-10-17 17:39:59,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-10-17 17:39:59,350 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:39:59,351 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:39:59,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-17 17:39:59,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ed1c946-32b2-4bc7-88b5-fb1862dff0b7/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-10-17 17:39:59,566 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:39:59,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:39:59,566 INFO L85 PathProgramCache]: Analyzing trace with hash -292146092, now seen corresponding path program 1 times [2022-10-17 17:39:59,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:39:59,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580674498] [2022-10-17 17:39:59,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:59,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:39:59,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat