./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product19.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product19.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh --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 4eb5ae4a2b95fd78cf87e688565203c0839d6de752e442a1cce7638954224909 --- 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-2329fc7 [2022-12-14 12:57:46,961 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:57:46,963 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:57:46,974 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:57:46,974 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:57:46,975 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:57:46,976 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:57:46,977 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:57:46,978 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:57:46,978 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:57:46,979 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:57:46,979 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:57:46,980 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:57:46,980 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:57:46,981 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:57:46,982 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:57:46,982 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:57:46,983 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:57:46,984 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:57:46,985 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:57:46,985 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:57:46,986 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:57:46,987 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:57:46,987 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:57:46,989 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:57:46,989 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:57:46,990 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:57:46,990 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:57:46,990 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:57:46,991 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:57:46,991 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:57:46,992 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:57:46,992 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:57:46,993 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:57:46,993 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:57:46,993 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:57:46,994 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:57:46,994 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:57:46,994 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:57:46,995 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:57:46,995 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:57:46,996 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 12:57:47,008 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:57:47,008 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:57:47,008 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:57:47,009 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:57:47,009 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:57:47,009 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:57:47,009 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:57:47,009 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:57:47,009 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:57:47,009 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 12:57:47,010 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:57:47,010 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:57:47,010 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 12:57:47,010 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 12:57:47,010 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:57:47,010 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 12:57:47,010 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 12:57:47,010 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 12:57:47,011 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:57:47,011 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 12:57:47,011 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 12:57:47,011 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 12:57:47,011 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:57:47,011 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 12:57:47,011 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:57:47,011 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 12:57:47,011 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 12:57:47,011 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 12:57:47,012 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:57:47,012 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 12:57:47,012 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:57:47,012 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:57:47,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:57:47,012 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:57:47,012 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 12:57:47,012 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:57:47,012 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 12:57:47,012 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 12:57:47,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 12:57:47,013 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 12:57:47,013 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:57:47,013 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_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4eb5ae4a2b95fd78cf87e688565203c0839d6de752e442a1cce7638954224909 [2022-12-14 12:57:47,172 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:57:47,188 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:57:47,190 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:57:47,191 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:57:47,191 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:57:47,192 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec3_product19.cil.c [2022-12-14 12:57:49,770 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:57:50,011 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:57:50,011 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/sv-benchmarks/c/product-lines/elevator_spec3_product19.cil.c [2022-12-14 12:57:50,024 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/data/1487bb266/4a727924c09b48b7893e8c6ddbc8b06a/FLAG5ca833c91 [2022-12-14 12:57:50,034 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/data/1487bb266/4a727924c09b48b7893e8c6ddbc8b06a [2022-12-14 12:57:50,036 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:57:50,037 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:57:50,038 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:57:50,038 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:57:50,041 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:57:50,041 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:57:50" (1/1) ... [2022-12-14 12:57:50,042 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34619864 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:50, skipping insertion in model container [2022-12-14 12:57:50,042 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:57:50" (1/1) ... [2022-12-14 12:57:50,049 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:57:50,108 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:57:50,472 WARN L237 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_146ade63-c853-4050-bfcf-f2bf9c752604/sv-benchmarks/c/product-lines/elevator_spec3_product19.cil.c[55726,55739] [2022-12-14 12:57:50,497 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:57:50,509 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 12:57:50,583 WARN L237 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_146ade63-c853-4050-bfcf-f2bf9c752604/sv-benchmarks/c/product-lines/elevator_spec3_product19.cil.c[55726,55739] [2022-12-14 12:57:50,596 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:57:50,626 INFO L208 MainTranslator]: Completed translation [2022-12-14 12:57:50,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:50 WrapperNode [2022-12-14 12:57:50,627 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:57:50,628 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 12:57:50,628 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 12:57:50,628 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 12:57:50,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:50" (1/1) ... [2022-12-14 12:57:50,656 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:50" (1/1) ... [2022-12-14 12:57:50,693 INFO L138 Inliner]: procedures = 92, calls = 346, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 1091 [2022-12-14 12:57:50,693 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 12:57:50,694 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 12:57:50,694 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 12:57:50,694 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 12:57:50,701 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:50" (1/1) ... [2022-12-14 12:57:50,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:50" (1/1) ... [2022-12-14 12:57:50,706 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:50" (1/1) ... [2022-12-14 12:57:50,706 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:50" (1/1) ... [2022-12-14 12:57:50,726 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:50" (1/1) ... [2022-12-14 12:57:50,739 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:50" (1/1) ... [2022-12-14 12:57:50,743 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:50" (1/1) ... [2022-12-14 12:57:50,748 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:50" (1/1) ... [2022-12-14 12:57:50,755 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 12:57:50,756 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 12:57:50,756 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 12:57:50,756 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 12:57:50,757 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:50" (1/1) ... [2022-12-14 12:57:50,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:57:50,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:57:50,786 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 12:57:50,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 12:57:50,823 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 12:57:50,823 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-12-14 12:57:50,823 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-12-14 12:57:50,823 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-12-14 12:57:50,823 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-12-14 12:57:50,824 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2022-12-14 12:57:50,824 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2022-12-14 12:57:50,824 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 12:57:50,824 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 12:57:50,824 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-12-14 12:57:50,824 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-12-14 12:57:50,824 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 12:57:50,825 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 12:57:50,825 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-12-14 12:57:50,825 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-12-14 12:57:50,825 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 12:57:50,825 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 12:57:50,825 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 12:57:50,825 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 12:57:50,825 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 12:57:50,826 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 12:57:50,826 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-12-14 12:57:50,826 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-12-14 12:57:50,826 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 12:57:50,826 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 12:57:50,826 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 12:57:50,826 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 12:57:50,827 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 12:57:50,827 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 12:57:50,827 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-12-14 12:57:50,827 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-12-14 12:57:50,827 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-12-14 12:57:50,827 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-12-14 12:57:50,827 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 12:57:50,828 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 12:57:50,828 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-12-14 12:57:50,828 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-12-14 12:57:50,828 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 12:57:50,828 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 12:57:50,828 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 12:57:50,828 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 12:57:50,829 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 12:57:50,829 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 12:57:50,829 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 12:57:50,829 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 12:57:50,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 12:57:50,829 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-12-14 12:57:50,829 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-12-14 12:57:50,830 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 12:57:50,830 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 12:57:50,830 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 12:57:50,830 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 12:57:50,830 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 12:57:50,830 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 12:57:50,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 12:57:50,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 12:57:50,831 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 12:57:50,831 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 12:57:50,951 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 12:57:50,952 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 12:57:51,683 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 12:57:52,099 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 12:57:52,100 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 12:57:52,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:57:52 BoogieIcfgContainer [2022-12-14 12:57:52,103 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 12:57:52,104 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 12:57:52,104 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 12:57:52,107 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 12:57:52,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:57:50" (1/3) ... [2022-12-14 12:57:52,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@93a8945 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:57:52, skipping insertion in model container [2022-12-14 12:57:52,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:50" (2/3) ... [2022-12-14 12:57:52,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@93a8945 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:57:52, skipping insertion in model container [2022-12-14 12:57:52,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:57:52" (3/3) ... [2022-12-14 12:57:52,110 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product19.cil.c [2022-12-14 12:57:52,127 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 12:57:52,127 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 12:57:52,175 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:57:52,181 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;@63489c08, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:57:52,181 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 12:57:52,186 INFO L276 IsEmpty]: Start isEmpty. Operand has 410 states, 273 states have (on average 1.5677655677655677) internal successors, (428), 291 states have internal predecessors, (428), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) [2022-12-14 12:57:52,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-12-14 12:57:52,202 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:57:52,203 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:57:52,204 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:57:52,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:57:52,208 INFO L85 PathProgramCache]: Analyzing trace with hash -543570369, now seen corresponding path program 1 times [2022-12-14 12:57:52,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:57:52,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594557928] [2022-12-14 12:57:52,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:57:52,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:57:52,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:57:52,771 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 12:57:52,772 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:57:52,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594557928] [2022-12-14 12:57:52,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594557928] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:57:52,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870935858] [2022-12-14 12:57:52,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:57:52,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:57:52,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:57:52,775 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:57:52,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 12:57:53,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:57:53,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 1597 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:57:53,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:57:53,172 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:57:53,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:57:53,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870935858] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:57:53,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:57:53,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 12:57:53,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119838695] [2022-12-14 12:57:53,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:57:53,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:57:53,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:57:53,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:57:53,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:57:53,210 INFO L87 Difference]: Start difference. First operand has 410 states, 273 states have (on average 1.5677655677655677) internal successors, (428), 291 states have internal predecessors, (428), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 12:57:53,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:57:53,462 INFO L93 Difference]: Finished difference Result 1153 states and 1836 transitions. [2022-12-14 12:57:53,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:57:53,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (18), 3 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 88 [2022-12-14 12:57:53,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:57:53,475 INFO L225 Difference]: With dead ends: 1153 [2022-12-14 12:57:53,476 INFO L226 Difference]: Without dead ends: 745 [2022-12-14 12:57:53,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:57:53,483 INFO L413 NwaCegarLoop]: 709 mSDtfsCounter, 513 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:57:53,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 1296 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:57:53,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2022-12-14 12:57:53,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 733. [2022-12-14 12:57:53,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 493 states have (on average 1.5598377281947262) internal successors, (769), 524 states have internal predecessors, (769), 191 states have call successors, (191), 49 states have call predecessors, (191), 48 states have return successors, (193), 185 states have call predecessors, (193), 188 states have call successors, (193) [2022-12-14 12:57:53,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 1153 transitions. [2022-12-14 12:57:53,561 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 1153 transitions. Word has length 88 [2022-12-14 12:57:53,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:57:53,562 INFO L495 AbstractCegarLoop]: Abstraction has 733 states and 1153 transitions. [2022-12-14 12:57:53,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 12:57:53,562 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 1153 transitions. [2022-12-14 12:57:53,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 12:57:53,566 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:57:53,566 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:57:53,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 12:57:53,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-14 12:57:53,769 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:57:53,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:57:53,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1016081550, now seen corresponding path program 1 times [2022-12-14 12:57:53,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:57:53,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126843163] [2022-12-14 12:57:53,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:57:53,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:57:53,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:57:54,114 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 12:57:54,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:57:54,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126843163] [2022-12-14 12:57:54,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126843163] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:57:54,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471668947] [2022-12-14 12:57:54,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:57:54,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:57:54,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:57:54,116 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:57:54,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 12:57:54,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:57:54,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 1585 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:57:54,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:57:54,436 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 12:57:54,436 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:57:54,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471668947] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:57:54,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:57:54,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 12:57:54,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812427886] [2022-12-14 12:57:54,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:57:54,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:57:54,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:57:54,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:57:54,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:57:54,440 INFO L87 Difference]: Start difference. First operand 733 states and 1153 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 12:57:54,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:57:54,632 INFO L93 Difference]: Finished difference Result 1795 states and 2854 transitions. [2022-12-14 12:57:54,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:57:54,632 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 87 [2022-12-14 12:57:54,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:57:54,638 INFO L225 Difference]: With dead ends: 1795 [2022-12-14 12:57:54,638 INFO L226 Difference]: Without dead ends: 1074 [2022-12-14 12:57:54,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:57:54,643 INFO L413 NwaCegarLoop]: 679 mSDtfsCounter, 568 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 1185 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 [2022-12-14 12:57:54,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 1185 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:57:54,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2022-12-14 12:57:54,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 1050. [2022-12-14 12:57:54,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 710 states have (on average 1.5676056338028168) internal successors, (1113), 756 states have internal predecessors, (1113), 271 states have call successors, (271), 68 states have call predecessors, (271), 68 states have return successors, (278), 264 states have call predecessors, (278), 268 states have call successors, (278) [2022-12-14 12:57:54,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 1662 transitions. [2022-12-14 12:57:54,693 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 1662 transitions. Word has length 87 [2022-12-14 12:57:54,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:57:54,693 INFO L495 AbstractCegarLoop]: Abstraction has 1050 states and 1662 transitions. [2022-12-14 12:57:54,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 12:57:54,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 1662 transitions. [2022-12-14 12:57:54,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-12-14 12:57:54,697 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:57:54,697 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:57:54,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 12:57:54,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:57:54,898 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:57:54,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:57:54,898 INFO L85 PathProgramCache]: Analyzing trace with hash -836392493, now seen corresponding path program 1 times [2022-12-14 12:57:54,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:57:54,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717979611] [2022-12-14 12:57:54,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:57:54,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:57:54,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:57:55,147 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 12:57:55,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:57:55,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717979611] [2022-12-14 12:57:55,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717979611] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:57:55,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:57:55,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 12:57:55,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732139621] [2022-12-14 12:57:55,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:57:55,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:57:55,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:57:55,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:57:55,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:57:55,150 INFO L87 Difference]: Start difference. First operand 1050 states and 1662 transitions. Second operand has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 12:57:56,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:57:56,043 INFO L93 Difference]: Finished difference Result 3541 states and 5778 transitions. [2022-12-14 12:57:56,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 12:57:56,043 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 88 [2022-12-14 12:57:56,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:57:56,058 INFO L225 Difference]: With dead ends: 3541 [2022-12-14 12:57:56,058 INFO L226 Difference]: Without dead ends: 2503 [2022-12-14 12:57:56,064 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 [2022-12-14 12:57:56,065 INFO L413 NwaCegarLoop]: 976 mSDtfsCounter, 828 mSDsluCounter, 3270 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 4246 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 12:57:56,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [899 Valid, 4246 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 12:57:56,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2503 states. [2022-12-14 12:57:56,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2503 to 1960. [2022-12-14 12:57:56,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1960 states, 1352 states have (on average 1.5754437869822486) internal successors, (2130), 1440 states have internal predecessors, (2130), 482 states have call successors, (482), 124 states have call predecessors, (482), 125 states have return successors, (529), 455 states have call predecessors, (529), 478 states have call successors, (529) [2022-12-14 12:57:56,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1960 states to 1960 states and 3141 transitions. [2022-12-14 12:57:56,190 INFO L78 Accepts]: Start accepts. Automaton has 1960 states and 3141 transitions. Word has length 88 [2022-12-14 12:57:56,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:57:56,190 INFO L495 AbstractCegarLoop]: Abstraction has 1960 states and 3141 transitions. [2022-12-14 12:57:56,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 12:57:56,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1960 states and 3141 transitions. [2022-12-14 12:57:56,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-12-14 12:57:56,193 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:57:56,193 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:57:56,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 12:57:56,194 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:57:56,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:57:56,194 INFO L85 PathProgramCache]: Analyzing trace with hash 555908482, now seen corresponding path program 1 times [2022-12-14 12:57:56,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:57:56,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791201061] [2022-12-14 12:57:56,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:57:56,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:57:56,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:57:56,349 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 12:57:56,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:57:56,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791201061] [2022-12-14 12:57:56,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791201061] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:57:56,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374176899] [2022-12-14 12:57:56,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:57:56,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:57:56,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:57:56,351 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:57:56,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 12:57:56,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:57:56,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 1598 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 12:57:56,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:57:56,729 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:57:56,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:57:56,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374176899] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:57:56,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:57:56,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 12:57:56,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451454207] [2022-12-14 12:57:56,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:57:56,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:57:56,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:57:56,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:57:56,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-12-14 12:57:56,732 INFO L87 Difference]: Start difference. First operand 1960 states and 3141 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-12-14 12:57:57,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:57:57,540 INFO L93 Difference]: Finished difference Result 5763 states and 9465 transitions. [2022-12-14 12:57:57,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 12:57:57,541 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), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 89 [2022-12-14 12:57:57,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:57:57,556 INFO L225 Difference]: With dead ends: 5763 [2022-12-14 12:57:57,556 INFO L226 Difference]: Without dead ends: 3815 [2022-12-14 12:57:57,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-12-14 12:57:57,577 INFO L413 NwaCegarLoop]: 710 mSDtfsCounter, 645 mSDsluCounter, 2298 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 3008 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 12:57:57,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [705 Valid, 3008 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 12:57:57,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3815 states. [2022-12-14 12:57:57,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3815 to 3785. [2022-12-14 12:57:57,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3785 states, 2528 states have (on average 1.5051424050632911) internal successors, (3805), 2750 states have internal predecessors, (3805), 1029 states have call successors, (1029), 224 states have call predecessors, (1029), 227 states have return successors, (1219), 946 states have call predecessors, (1219), 1023 states have call successors, (1219) [2022-12-14 12:57:57,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 6053 transitions. [2022-12-14 12:57:57,752 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 6053 transitions. Word has length 89 [2022-12-14 12:57:57,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:57:57,753 INFO L495 AbstractCegarLoop]: Abstraction has 3785 states and 6053 transitions. [2022-12-14 12:57:57,753 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), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-12-14 12:57:57,753 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 6053 transitions. [2022-12-14 12:57:57,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-12-14 12:57:57,754 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:57:57,754 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:57:57,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 12:57:57,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:57:57,955 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:57:57,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:57:57,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1660477715, now seen corresponding path program 1 times [2022-12-14 12:57:57,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:57:57,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188105280] [2022-12-14 12:57:57,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:57:57,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:57:57,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:57:58,113 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 12:57:58,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:57:58,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188105280] [2022-12-14 12:57:58,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188105280] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:57:58,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218778671] [2022-12-14 12:57:58,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:57:58,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:57:58,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:57:58,115 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:57:58,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 12:57:58,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:57:58,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 1586 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:57:58,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:57:58,400 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 12:57:58,400 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:57:58,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218778671] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:57:58,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:57:58,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 12:57:58,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083535062] [2022-12-14 12:57:58,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:57:58,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:57:58,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:57:58,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:57:58,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:57:58,402 INFO L87 Difference]: Start difference. First operand 3785 states and 6053 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 12:57:58,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:57:58,787 INFO L93 Difference]: Finished difference Result 8289 states and 13335 transitions. [2022-12-14 12:57:58,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:57:58,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 88 [2022-12-14 12:57:58,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:57:58,821 INFO L225 Difference]: With dead ends: 8289 [2022-12-14 12:57:58,821 INFO L226 Difference]: Without dead ends: 4516 [2022-12-14 12:57:58,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:57:58,842 INFO L413 NwaCegarLoop]: 787 mSDtfsCounter, 566 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 1290 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:57:58,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [566 Valid, 1290 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:57:58,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4516 states. [2022-12-14 12:57:58,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4516 to 3722. [2022-12-14 12:57:58,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3722 states, 2485 states have (on average 1.5038229376257546) internal successors, (3737), 2706 states have internal predecessors, (3737), 1017 states have call successors, (1017), 220 states have call predecessors, (1017), 219 states have return successors, (1166), 931 states have call predecessors, (1166), 1011 states have call successors, (1166) [2022-12-14 12:57:59,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3722 states to 3722 states and 5920 transitions. [2022-12-14 12:57:59,038 INFO L78 Accepts]: Start accepts. Automaton has 3722 states and 5920 transitions. Word has length 88 [2022-12-14 12:57:59,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:57:59,038 INFO L495 AbstractCegarLoop]: Abstraction has 3722 states and 5920 transitions. [2022-12-14 12:57:59,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 12:57:59,038 INFO L276 IsEmpty]: Start isEmpty. Operand 3722 states and 5920 transitions. [2022-12-14 12:57:59,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 12:57:59,041 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:57:59,041 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:57:59,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 12:57:59,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:57:59,242 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:57:59,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:57:59,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1962672203, now seen corresponding path program 1 times [2022-12-14 12:57:59,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:57:59,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773686389] [2022-12-14 12:57:59,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:57:59,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:57:59,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:57:59,613 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 12:57:59,614 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:57:59,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773686389] [2022-12-14 12:57:59,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773686389] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:57:59,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706474869] [2022-12-14 12:57:59,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:57:59,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:57:59,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:57:59,615 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:57:59,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 12:57:59,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:57:59,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 1612 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 12:57:59,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:58:00,005 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 12:58:00,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:58:00,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706474869] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:58:00,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:58:00,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 15 [2022-12-14 12:58:00,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639818352] [2022-12-14 12:58:00,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:58:00,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 12:58:00,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:58:00,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 12:58:00,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-12-14 12:58:00,006 INFO L87 Difference]: Start difference. First operand 3722 states and 5920 transitions. Second operand has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-12-14 12:58:01,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:58:01,784 INFO L93 Difference]: Finished difference Result 9218 states and 14985 transitions. [2022-12-14 12:58:01,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 12:58:01,785 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 94 [2022-12-14 12:58:01,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:58:01,812 INFO L225 Difference]: With dead ends: 9218 [2022-12-14 12:58:01,813 INFO L226 Difference]: Without dead ends: 5508 [2022-12-14 12:58:01,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-12-14 12:58:01,831 INFO L413 NwaCegarLoop]: 830 mSDtfsCounter, 1590 mSDsluCounter, 1646 mSDsCounter, 0 mSdLazyCounter, 2307 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1647 SdHoareTripleChecker+Valid, 2476 SdHoareTripleChecker+Invalid, 2559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 2307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:58:01,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1647 Valid, 2476 Invalid, 2559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 2307 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 12:58:01,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5508 states. [2022-12-14 12:58:02,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5508 to 4062. [2022-12-14 12:58:02,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4062 states, 2741 states have (on average 1.4866836920831814) internal successors, (4075), 2970 states have internal predecessors, (4075), 1077 states have call successors, (1077), 248 states have call predecessors, (1077), 243 states have return successors, (1228), 979 states have call predecessors, (1228), 1071 states have call successors, (1228) [2022-12-14 12:58:02,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4062 states to 4062 states and 6380 transitions. [2022-12-14 12:58:02,046 INFO L78 Accepts]: Start accepts. Automaton has 4062 states and 6380 transitions. Word has length 94 [2022-12-14 12:58:02,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:58:02,046 INFO L495 AbstractCegarLoop]: Abstraction has 4062 states and 6380 transitions. [2022-12-14 12:58:02,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-12-14 12:58:02,046 INFO L276 IsEmpty]: Start isEmpty. Operand 4062 states and 6380 transitions. [2022-12-14 12:58:02,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-12-14 12:58:02,048 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:58:02,048 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:58:02,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 12:58:02,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 12:58:02,249 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:58:02,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:58:02,249 INFO L85 PathProgramCache]: Analyzing trace with hash 738946792, now seen corresponding path program 1 times [2022-12-14 12:58:02,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:58:02,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316023721] [2022-12-14 12:58:02,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:02,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:58:02,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:02,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 12:58:02,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:58:02,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316023721] [2022-12-14 12:58:02,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316023721] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:58:02,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926773763] [2022-12-14 12:58:02,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:02,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:58:02,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:58:02,567 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:58:02,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 12:58:02,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:02,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 1626 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 12:58:02,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:58:02,899 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 12:58:02,899 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:58:02,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926773763] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:58:02,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:58:02,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-12-14 12:58:02,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347858413] [2022-12-14 12:58:02,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:58:02,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:58:02,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:58:02,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:58:02,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-12-14 12:58:02,901 INFO L87 Difference]: Start difference. First operand 4062 states and 6380 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 12:58:03,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:58:03,341 INFO L93 Difference]: Finished difference Result 8449 states and 13578 transitions. [2022-12-14 12:58:03,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 12:58:03,342 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 99 [2022-12-14 12:58:03,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:58:03,378 INFO L225 Difference]: With dead ends: 8449 [2022-12-14 12:58:03,378 INFO L226 Difference]: Without dead ends: 5228 [2022-12-14 12:58:03,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-12-14 12:58:03,392 INFO L413 NwaCegarLoop]: 657 mSDtfsCounter, 139 mSDsluCounter, 2509 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 3166 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:58:03,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 3166 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:58:03,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5228 states. [2022-12-14 12:58:03,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5228 to 4286. [2022-12-14 12:58:03,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4286 states, 2893 states have (on average 1.4811614241272035) internal successors, (4285), 3143 states have internal predecessors, (4285), 1136 states have call successors, (1136), 248 states have call predecessors, (1136), 256 states have return successors, (1327), 1048 states have call predecessors, (1327), 1130 states have call successors, (1327) [2022-12-14 12:58:03,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4286 states to 4286 states and 6748 transitions. [2022-12-14 12:58:03,642 INFO L78 Accepts]: Start accepts. Automaton has 4286 states and 6748 transitions. Word has length 99 [2022-12-14 12:58:03,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:58:03,642 INFO L495 AbstractCegarLoop]: Abstraction has 4286 states and 6748 transitions. [2022-12-14 12:58:03,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 12:58:03,642 INFO L276 IsEmpty]: Start isEmpty. Operand 4286 states and 6748 transitions. [2022-12-14 12:58:03,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-12-14 12:58:03,644 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:58:03,644 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:58:03,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 12:58:03,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 12:58:03,845 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:58:03,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:58:03,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1336810173, now seen corresponding path program 1 times [2022-12-14 12:58:03,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:58:03,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16357496] [2022-12-14 12:58:03,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:03,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:58:03,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:04,203 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 12:58:04,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:58:04,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16357496] [2022-12-14 12:58:04,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16357496] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:58:04,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025601410] [2022-12-14 12:58:04,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:04,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:58:04,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:58:04,205 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:58:04,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 12:58:04,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:04,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 1637 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 12:58:04,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:58:04,552 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 12:58:04,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:58:04,769 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 12:58:04,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025601410] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 12:58:04,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:58:04,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 20 [2022-12-14 12:58:04,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709810093] [2022-12-14 12:58:04,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:58:04,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 12:58:04,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:58:04,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 12:58:04,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-12-14 12:58:04,771 INFO L87 Difference]: Start difference. First operand 4286 states and 6748 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, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2022-12-14 12:58:07,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:58:07,280 INFO L93 Difference]: Finished difference Result 11696 states and 19385 transitions. [2022-12-14 12:58:07,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 12:58:07,281 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, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) Word has length 103 [2022-12-14 12:58:07,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:58:07,311 INFO L225 Difference]: With dead ends: 11696 [2022-12-14 12:58:07,312 INFO L226 Difference]: Without dead ends: 8617 [2022-12-14 12:58:07,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 12:58:07,326 INFO L413 NwaCegarLoop]: 676 mSDtfsCounter, 3072 mSDsluCounter, 2132 mSDsCounter, 0 mSdLazyCounter, 2619 mSolverCounterSat, 1449 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3159 SdHoareTripleChecker+Valid, 2808 SdHoareTripleChecker+Invalid, 4068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1449 IncrementalHoareTripleChecker+Valid, 2619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-14 12:58:07,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3159 Valid, 2808 Invalid, 4068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1449 Valid, 2619 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-14 12:58:07,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8617 states. [2022-12-14 12:58:07,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8617 to 7416. [2022-12-14 12:58:07,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7416 states, 5222 states have (on average 1.4854461891995403) internal successors, (7757), 5512 states have internal predecessors, (7757), 1671 states have call successors, (1671), 484 states have call predecessors, (1671), 522 states have return successors, (2400), 1563 states have call predecessors, (2400), 1663 states have call successors, (2400) [2022-12-14 12:58:07,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7416 states to 7416 states and 11828 transitions. [2022-12-14 12:58:07,722 INFO L78 Accepts]: Start accepts. Automaton has 7416 states and 11828 transitions. Word has length 103 [2022-12-14 12:58:07,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:58:07,722 INFO L495 AbstractCegarLoop]: Abstraction has 7416 states and 11828 transitions. [2022-12-14 12:58:07,722 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, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2022-12-14 12:58:07,722 INFO L276 IsEmpty]: Start isEmpty. Operand 7416 states and 11828 transitions. [2022-12-14 12:58:07,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-12-14 12:58:07,724 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:58:07,724 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:58:07,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 12:58:07,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:58:07,926 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:58:07,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:58:07,927 INFO L85 PathProgramCache]: Analyzing trace with hash 465635750, now seen corresponding path program 1 times [2022-12-14 12:58:07,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:58:07,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031062902] [2022-12-14 12:58:07,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:07,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:58:07,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:08,271 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 12:58:08,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:58:08,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031062902] [2022-12-14 12:58:08,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031062902] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:58:08,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129964314] [2022-12-14 12:58:08,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:08,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:58:08,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:58:08,273 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:58:08,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 12:58:08,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:08,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 1654 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 12:58:08,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:58:08,609 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 12:58:08,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:58:08,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129964314] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:58:08,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:58:08,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-12-14 12:58:08,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648259027] [2022-12-14 12:58:08,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:58:08,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:58:08,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:58:08,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:58:08,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-12-14 12:58:08,612 INFO L87 Difference]: Start difference. First operand 7416 states and 11828 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) [2022-12-14 12:58:09,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:58:09,470 INFO L93 Difference]: Finished difference Result 13639 states and 21806 transitions. [2022-12-14 12:58:09,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 12:58:09,471 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) Word has length 107 [2022-12-14 12:58:09,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:58:09,504 INFO L225 Difference]: With dead ends: 13639 [2022-12-14 12:58:09,504 INFO L226 Difference]: Without dead ends: 7438 [2022-12-14 12:58:09,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-12-14 12:58:09,527 INFO L413 NwaCegarLoop]: 732 mSDtfsCounter, 424 mSDsluCounter, 1865 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 2597 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:58:09,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 2597 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 12:58:09,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7438 states. [2022-12-14 12:58:09,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7438 to 7416. [2022-12-14 12:58:09,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7416 states, 5222 states have (on average 1.4854461891995403) internal successors, (7757), 5512 states have internal predecessors, (7757), 1671 states have call successors, (1671), 484 states have call predecessors, (1671), 522 states have return successors, (2392), 1563 states have call predecessors, (2392), 1663 states have call successors, (2392) [2022-12-14 12:58:09,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7416 states to 7416 states and 11820 transitions. [2022-12-14 12:58:09,977 INFO L78 Accepts]: Start accepts. Automaton has 7416 states and 11820 transitions. Word has length 107 [2022-12-14 12:58:09,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:58:09,977 INFO L495 AbstractCegarLoop]: Abstraction has 7416 states and 11820 transitions. [2022-12-14 12:58:09,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) [2022-12-14 12:58:09,978 INFO L276 IsEmpty]: Start isEmpty. Operand 7416 states and 11820 transitions. [2022-12-14 12:58:09,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 12:58:09,981 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:58:09,981 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:58:09,996 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 12:58:10,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:58:10,182 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:58:10,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:58:10,183 INFO L85 PathProgramCache]: Analyzing trace with hash -687826599, now seen corresponding path program 1 times [2022-12-14 12:58:10,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:58:10,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446008975] [2022-12-14 12:58:10,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:10,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:58:10,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:10,507 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 12:58:10,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:58:10,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446008975] [2022-12-14 12:58:10,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446008975] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:58:10,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308314987] [2022-12-14 12:58:10,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:10,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:58:10,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:58:10,509 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:58:10,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 12:58:10,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:10,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 1750 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 12:58:10,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:58:10,857 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 12:58:10,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:58:10,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308314987] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:58:10,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:58:10,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 11 [2022-12-14 12:58:10,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55479087] [2022-12-14 12:58:10,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:58:10,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:58:10,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:58:10,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:58:10,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-12-14 12:58:10,859 INFO L87 Difference]: Start difference. First operand 7416 states and 11820 transitions. Second operand has 6 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-12-14 12:58:12,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:58:12,818 INFO L93 Difference]: Finished difference Result 25214 states and 43217 transitions. [2022-12-14 12:58:12,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 12:58:12,819 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 134 [2022-12-14 12:58:12,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:58:12,916 INFO L225 Difference]: With dead ends: 25214 [2022-12-14 12:58:12,916 INFO L226 Difference]: Without dead ends: 17810 [2022-12-14 12:58:12,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-12-14 12:58:12,955 INFO L413 NwaCegarLoop]: 988 mSDtfsCounter, 795 mSDsluCounter, 3025 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 863 SdHoareTripleChecker+Valid, 4013 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 12:58:12,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [863 Valid, 4013 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 12:58:12,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17810 states. [2022-12-14 12:58:13,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17810 to 14718. [2022-12-14 12:58:13,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14718 states, 10400 states have (on average 1.4820192307692308) internal successors, (15413), 10992 states have internal predecessors, (15413), 3321 states have call successors, (3321), 917 states have call predecessors, (3321), 996 states have return successors, (5519), 3054 states have call predecessors, (5519), 3309 states have call successors, (5519) [2022-12-14 12:58:13,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14718 states to 14718 states and 24253 transitions. [2022-12-14 12:58:13,866 INFO L78 Accepts]: Start accepts. Automaton has 14718 states and 24253 transitions. Word has length 134 [2022-12-14 12:58:13,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:58:13,866 INFO L495 AbstractCegarLoop]: Abstraction has 14718 states and 24253 transitions. [2022-12-14 12:58:13,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-12-14 12:58:13,866 INFO L276 IsEmpty]: Start isEmpty. Operand 14718 states and 24253 transitions. [2022-12-14 12:58:13,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-12-14 12:58:13,869 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:58:13,869 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:58:13,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 12:58:14,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 12:58:14,069 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:58:14,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:58:14,070 INFO L85 PathProgramCache]: Analyzing trace with hash 827551025, now seen corresponding path program 1 times [2022-12-14 12:58:14,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:58:14,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421777644] [2022-12-14 12:58:14,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:14,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:58:14,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:14,622 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-14 12:58:14,622 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:58:14,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421777644] [2022-12-14 12:58:14,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421777644] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:58:14,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:58:14,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-12-14 12:58:14,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893231471] [2022-12-14 12:58:14,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:58:14,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 12:58:14,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:58:14,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 12:58:14,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-12-14 12:58:14,624 INFO L87 Difference]: Start difference. First operand 14718 states and 24253 transitions. Second operand has 14 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 7 states have call predecessors, (24), 5 states have call successors, (24) [2022-12-14 12:58:21,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:58:21,222 INFO L93 Difference]: Finished difference Result 55482 states and 95732 transitions. [2022-12-14 12:58:21,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-14 12:58:21,223 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 7 states have call predecessors, (24), 5 states have call successors, (24) Word has length 140 [2022-12-14 12:58:21,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:58:21,453 INFO L225 Difference]: With dead ends: 55482 [2022-12-14 12:58:21,454 INFO L226 Difference]: Without dead ends: 40776 [2022-12-14 12:58:21,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=309, Invalid=1761, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 12:58:21,540 INFO L413 NwaCegarLoop]: 554 mSDtfsCounter, 3321 mSDsluCounter, 3554 mSDsCounter, 0 mSdLazyCounter, 7632 mSolverCounterSat, 1482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3426 SdHoareTripleChecker+Valid, 4108 SdHoareTripleChecker+Invalid, 9114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1482 IncrementalHoareTripleChecker+Valid, 7632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-12-14 12:58:21,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3426 Valid, 4108 Invalid, 9114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1482 Valid, 7632 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-12-14 12:58:21,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40776 states. [2022-12-14 12:58:23,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40776 to 35281. [2022-12-14 12:58:23,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35281 states, 25970 states have (on average 1.4867539468617637) internal successors, (38611), 26922 states have internal predecessors, (38611), 6528 states have call successors, (6528), 2517 states have call predecessors, (6528), 2782 states have return successors, (10695), 6267 states have call predecessors, (10695), 6508 states have call successors, (10695) [2022-12-14 12:58:23,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35281 states to 35281 states and 55834 transitions. [2022-12-14 12:58:23,854 INFO L78 Accepts]: Start accepts. Automaton has 35281 states and 55834 transitions. Word has length 140 [2022-12-14 12:58:23,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:58:23,854 INFO L495 AbstractCegarLoop]: Abstraction has 35281 states and 55834 transitions. [2022-12-14 12:58:23,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 7 states have call predecessors, (24), 5 states have call successors, (24) [2022-12-14 12:58:23,854 INFO L276 IsEmpty]: Start isEmpty. Operand 35281 states and 55834 transitions. [2022-12-14 12:58:23,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-12-14 12:58:23,859 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:58:23,860 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:58:23,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 12:58:23,860 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:58:23,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:58:23,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1024047028, now seen corresponding path program 1 times [2022-12-14 12:58:23,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:58:23,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802978240] [2022-12-14 12:58:23,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:23,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:58:23,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:23,932 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-12-14 12:58:23,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:58:23,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802978240] [2022-12-14 12:58:23,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802978240] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:58:23,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:58:23,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:58:23,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365690048] [2022-12-14 12:58:23,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:58:23,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:58:23,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:58:23,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:58:23,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:58:23,934 INFO L87 Difference]: Start difference. First operand 35281 states and 55834 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-12-14 12:58:27,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:58:27,008 INFO L93 Difference]: Finished difference Result 82436 states and 132249 transitions. [2022-12-14 12:58:27,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:58:27,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 173 [2022-12-14 12:58:27,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:58:27,211 INFO L225 Difference]: With dead ends: 82436 [2022-12-14 12:58:27,211 INFO L226 Difference]: Without dead ends: 47167 [2022-12-14 12:58:27,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:58:27,380 INFO L413 NwaCegarLoop]: 810 mSDtfsCounter, 527 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 1390 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:58:27,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 1390 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:58:27,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47167 states. [2022-12-14 12:58:30,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47167 to 46798. [2022-12-14 12:58:30,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46798 states, 34496 states have (on average 1.4868100649350648) internal successors, (51289), 35774 states have internal predecessors, (51289), 8604 states have call successors, (8604), 3326 states have call predecessors, (8604), 3697 states have return successors, (14202), 8267 states have call predecessors, (14202), 8584 states have call successors, (14202) [2022-12-14 12:58:30,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46798 states to 46798 states and 74095 transitions. [2022-12-14 12:58:30,459 INFO L78 Accepts]: Start accepts. Automaton has 46798 states and 74095 transitions. Word has length 173 [2022-12-14 12:58:30,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:58:30,459 INFO L495 AbstractCegarLoop]: Abstraction has 46798 states and 74095 transitions. [2022-12-14 12:58:30,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-12-14 12:58:30,459 INFO L276 IsEmpty]: Start isEmpty. Operand 46798 states and 74095 transitions. [2022-12-14 12:58:30,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-12-14 12:58:30,468 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:58:30,468 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:58:30,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 12:58:30,468 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:58:30,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:58:30,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1326336947, now seen corresponding path program 1 times [2022-12-14 12:58:30,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:58:30,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924662021] [2022-12-14 12:58:30,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:30,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:58:30,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:30,672 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-12-14 12:58:30,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:58:30,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924662021] [2022-12-14 12:58:30,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924662021] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:58:30,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115744789] [2022-12-14 12:58:30,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:30,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:58:30,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:58:30,674 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:58:30,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 12:58:30,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:30,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 2067 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 12:58:30,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:58:30,986 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 12:58:30,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:58:30,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115744789] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:58:30,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:58:30,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 9 [2022-12-14 12:58:30,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841082645] [2022-12-14 12:58:30,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:58:30,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 12:58:30,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:58:30,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 12:58:30,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-12-14 12:58:30,988 INFO L87 Difference]: Start difference. First operand 46798 states and 74095 transitions. Second operand has 9 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 3 states have call successors, (34), 3 states have call predecessors, (34), 5 states have return successors, (32), 5 states have call predecessors, (32), 3 states have call successors, (32) [2022-12-14 12:58:36,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:58:36,863 INFO L93 Difference]: Finished difference Result 124608 states and 199792 transitions. [2022-12-14 12:58:36,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 12:58:36,864 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 3 states have call successors, (34), 3 states have call predecessors, (34), 5 states have return successors, (32), 5 states have call predecessors, (32), 3 states have call successors, (32) Word has length 178 [2022-12-14 12:58:36,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:58:37,190 INFO L225 Difference]: With dead ends: 124608 [2022-12-14 12:58:37,190 INFO L226 Difference]: Without dead ends: 81042 [2022-12-14 12:58:37,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-12-14 12:58:37,365 INFO L413 NwaCegarLoop]: 735 mSDtfsCounter, 709 mSDsluCounter, 3901 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 770 SdHoareTripleChecker+Valid, 4636 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 12:58:37,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [770 Valid, 4636 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1061 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 12:58:37,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81042 states. [2022-12-14 12:58:41,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81042 to 79630. [2022-12-14 12:58:41,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79630 states, 58764 states have (on average 1.4895003743788715) internal successors, (87529), 60834 states have internal predecessors, (87529), 14664 states have call successors, (14664), 5630 states have call predecessors, (14664), 6201 states have return successors, (25416), 14095 states have call predecessors, (25416), 14628 states have call successors, (25416) [2022-12-14 12:58:42,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79630 states to 79630 states and 127609 transitions. [2022-12-14 12:58:42,486 INFO L78 Accepts]: Start accepts. Automaton has 79630 states and 127609 transitions. Word has length 178 [2022-12-14 12:58:42,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:58:42,487 INFO L495 AbstractCegarLoop]: Abstraction has 79630 states and 127609 transitions. [2022-12-14 12:58:42,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 3 states have call successors, (34), 3 states have call predecessors, (34), 5 states have return successors, (32), 5 states have call predecessors, (32), 3 states have call successors, (32) [2022-12-14 12:58:42,487 INFO L276 IsEmpty]: Start isEmpty. Operand 79630 states and 127609 transitions. [2022-12-14 12:58:42,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-12-14 12:58:42,500 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:58:42,501 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:58:42,506 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 12:58:42,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 12:58:42,702 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:58:42,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:58:42,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1543659764, now seen corresponding path program 1 times [2022-12-14 12:58:42,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:58:42,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161800903] [2022-12-14 12:58:42,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:42,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:58:42,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:42,856 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-12-14 12:58:42,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:58:42,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161800903] [2022-12-14 12:58:42,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161800903] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:58:42,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:58:42,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:58:42,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574976603] [2022-12-14 12:58:42,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:58:42,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:58:42,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:58:42,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:58:42,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:58:42,858 INFO L87 Difference]: Start difference. First operand 79630 states and 127609 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 12:58:48,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:58:48,726 INFO L93 Difference]: Finished difference Result 163191 states and 268015 transitions. [2022-12-14 12:58:48,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:58:48,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 181 [2022-12-14 12:58:48,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:58:49,161 INFO L225 Difference]: With dead ends: 163191 [2022-12-14 12:58:49,161 INFO L226 Difference]: Without dead ends: 86799 [2022-12-14 12:58:49,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:58:49,638 INFO L413 NwaCegarLoop]: 794 mSDtfsCounter, 103 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 1420 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:58:49,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 1420 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:58:49,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86799 states. [2022-12-14 12:58:54,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86799 to 79918. [2022-12-14 12:58:54,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79918 states, 59020 states have (on average 1.4879193493730938) internal successors, (87817), 61090 states have internal predecessors, (87817), 14696 states have call successors, (14696), 5630 states have call predecessors, (14696), 6201 states have return successors, (25448), 14127 states have call predecessors, (25448), 14660 states have call successors, (25448) [2022-12-14 12:58:55,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79918 states to 79918 states and 127961 transitions. [2022-12-14 12:58:55,126 INFO L78 Accepts]: Start accepts. Automaton has 79918 states and 127961 transitions. Word has length 181 [2022-12-14 12:58:55,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:58:55,126 INFO L495 AbstractCegarLoop]: Abstraction has 79918 states and 127961 transitions. [2022-12-14 12:58:55,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 12:58:55,126 INFO L276 IsEmpty]: Start isEmpty. Operand 79918 states and 127961 transitions. [2022-12-14 12:58:55,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-12-14 12:58:55,136 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:58:55,136 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:58:55,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 12:58:55,136 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:58:55,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:58:55,136 INFO L85 PathProgramCache]: Analyzing trace with hash -521468285, now seen corresponding path program 1 times [2022-12-14 12:58:55,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:58:55,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114997471] [2022-12-14 12:58:55,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:55,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:58:55,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:55,302 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-12-14 12:58:55,303 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:58:55,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114997471] [2022-12-14 12:58:55,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114997471] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:58:55,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601507577] [2022-12-14 12:58:55,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:55,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:58:55,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:58:55,304 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:58:55,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 12:58:55,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:55,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 2068 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 12:58:55,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:58:55,557 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 12:58:55,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:58:55,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601507577] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:58:55,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:58:55,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 8 [2022-12-14 12:58:55,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233116313] [2022-12-14 12:58:55,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:58:55,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 12:58:55,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:58:55,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 12:58:55,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 12:58:55,558 INFO L87 Difference]: Start difference. First operand 79918 states and 127961 transitions. Second operand has 8 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 3 states have call successors, (32), 3 states have call predecessors, (32), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2022-12-14 12:59:01,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:59:01,594 INFO L93 Difference]: Finished difference Result 166586 states and 266491 transitions. [2022-12-14 12:59:01,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 12:59:01,595 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 3 states have call successors, (32), 3 states have call predecessors, (32), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) Word has length 180 [2022-12-14 12:59:01,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:59:01,987 INFO L225 Difference]: With dead ends: 166586 [2022-12-14 12:59:01,987 INFO L226 Difference]: Without dead ends: 90048 [2022-12-14 12:59:02,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-12-14 12:59:02,322 INFO L413 NwaCegarLoop]: 1051 mSDtfsCounter, 606 mSDsluCounter, 4450 mSDsCounter, 0 mSdLazyCounter, 1907 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 5501 SdHoareTripleChecker+Invalid, 2038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 12:59:02,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [664 Valid, 5501 Invalid, 2038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1907 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 12:59:02,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90048 states. [2022-12-14 12:59:07,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90048 to 89888. [2022-12-14 12:59:07,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89888 states, 66536 states have (on average 1.487781050859685) internal successors, (98991), 68768 states have internal predecessors, (98991), 16250 states have call successors, (16250), 6494 states have call predecessors, (16250), 7101 states have return successors, (27368), 15675 states have call predecessors, (27368), 16202 states have call successors, (27368) [2022-12-14 12:59:07,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89888 states to 89888 states and 142609 transitions. [2022-12-14 12:59:07,968 INFO L78 Accepts]: Start accepts. Automaton has 89888 states and 142609 transitions. Word has length 180 [2022-12-14 12:59:07,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:59:07,968 INFO L495 AbstractCegarLoop]: Abstraction has 89888 states and 142609 transitions. [2022-12-14 12:59:07,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 3 states have call successors, (32), 3 states have call predecessors, (32), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2022-12-14 12:59:07,969 INFO L276 IsEmpty]: Start isEmpty. Operand 89888 states and 142609 transitions. [2022-12-14 12:59:07,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-12-14 12:59:07,979 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:59:07,979 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:59:07,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 12:59:08,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:59:08,181 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:59:08,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:59:08,182 INFO L85 PathProgramCache]: Analyzing trace with hash -439681734, now seen corresponding path program 1 times [2022-12-14 12:59:08,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:59:08,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311632167] [2022-12-14 12:59:08,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:59:08,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:59:08,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:59:08,444 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-12-14 12:59:08,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:59:08,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311632167] [2022-12-14 12:59:08,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311632167] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:59:08,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561344786] [2022-12-14 12:59:08,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:59:08,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:59:08,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:59:08,445 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:59:08,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 12:59:08,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:59:08,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 2085 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 12:59:08,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:59:08,804 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 85 proven. 6 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 12:59:08,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:59:09,137 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-12-14 12:59:09,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561344786] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:59:09,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2012927121] [2022-12-14 12:59:09,157 INFO L159 IcfgInterpreter]: Started Sifa with 112 locations of interest [2022-12-14 12:59:09,157 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:59:09,160 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:59:09,164 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:59:09,165 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:59:14,719 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 679 for LOIs [2022-12-14 12:59:22,806 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 32 for LOIs [2022-12-14 12:59:22,808 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 44 for LOIs [2022-12-14 12:59:22,904 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 55 for LOIs [2022-12-14 12:59:22,953 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__weight with input of size 35 for LOIs [2022-12-14 12:59:23,038 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 35 for LOIs [2022-12-14 12:59:23,045 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 63 for LOIs [2022-12-14 12:59:23,060 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 601 for LOIs [2022-12-14 12:59:25,013 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 575 for LOIs [2022-12-14 12:59:25,202 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 31 for LOIs [2022-12-14 12:59:25,204 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 58 for LOIs [2022-12-14 12:59:25,265 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 51 for LOIs [2022-12-14 12:59:25,268 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 55 for LOIs [2022-12-14 12:59:25,275 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 575 for LOIs [2022-12-14 12:59:28,503 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 579 for LOIs [2022-12-14 12:59:29,063 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 507 for LOIs [2022-12-14 12:59:29,209 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:59:51,233 WARN L233 SmtUtils]: Spent 5.15s on a formula simplification. DAG size of input: 647 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:00:33,196 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1526839#(and (= ~executiveFloor~0 4) (= ~currentHeading~0 0) (= ~head~0.offset 0) (<= ~floorButtons_0~0 2147483647) (= ~expectedDirection~0 1) (= ~head~0.base 0) (= |#NULL.offset| 0) (<= 0 (+ ~floorButtons_0~0 2147483648)) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 13:00:33,196 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:00:33,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:00:33,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 10] total 18 [2022-12-14 13:00:33,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690301660] [2022-12-14 13:00:33,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:00:33,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 13:00:33,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:00:33,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 13:00:33,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=841, Invalid=10289, Unknown=0, NotChecked=0, Total=11130 [2022-12-14 13:00:33,200 INFO L87 Difference]: Start difference. First operand 89888 states and 142609 transitions. Second operand has 18 states, 15 states have (on average 12.133333333333333) internal successors, (182), 16 states have internal predecessors, (182), 9 states have call successors, (76), 9 states have call predecessors, (76), 11 states have return successors, (75), 12 states have call predecessors, (75), 9 states have call successors, (75) [2022-12-14 13:01:03,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:01:03,959 INFO L93 Difference]: Finished difference Result 185332 states and 310702 transitions. [2022-12-14 13:01:03,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-12-14 13:01:03,960 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 12.133333333333333) internal successors, (182), 16 states have internal predecessors, (182), 9 states have call successors, (76), 9 states have call predecessors, (76), 11 states have return successors, (75), 12 states have call predecessors, (75), 9 states have call successors, (75) Word has length 184 [2022-12-14 13:01:03,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:01:04,676 INFO L225 Difference]: With dead ends: 185332 [2022-12-14 13:01:04,676 INFO L226 Difference]: Without dead ends: 119054 [2022-12-14 13:01:05,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 728 GetRequests, 465 SyntacticMatches, 23 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26481 ImplicationChecksByTransitivity, 66.6s TimeCoverageRelationStatistics Valid=4016, Invalid=54306, Unknown=0, NotChecked=0, Total=58322 [2022-12-14 13:01:05,083 INFO L413 NwaCegarLoop]: 1245 mSDtfsCounter, 12420 mSDsluCounter, 9874 mSDsCounter, 0 mSdLazyCounter, 28568 mSolverCounterSat, 11418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12468 SdHoareTripleChecker+Valid, 11119 SdHoareTripleChecker+Invalid, 39986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11418 IncrementalHoareTripleChecker+Valid, 28568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:01:05,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12468 Valid, 11119 Invalid, 39986 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11418 Valid, 28568 Invalid, 0 Unknown, 0 Unchecked, 18.0s Time] [2022-12-14 13:01:05,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119054 states. [2022-12-14 13:01:11,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119054 to 105365. [2022-12-14 13:01:11,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105365 states, 76616 states have (on average 1.472734154745745) internal successors, (112835), 79673 states have internal predecessors, (112835), 20276 states have call successors, (20276), 7682 states have call predecessors, (20276), 8472 states have return successors, (35898), 19507 states have call predecessors, (35898), 20208 states have call successors, (35898) [2022-12-14 13:01:12,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105365 states to 105365 states and 169009 transitions. [2022-12-14 13:01:12,812 INFO L78 Accepts]: Start accepts. Automaton has 105365 states and 169009 transitions. Word has length 184 [2022-12-14 13:01:12,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:01:12,813 INFO L495 AbstractCegarLoop]: Abstraction has 105365 states and 169009 transitions. [2022-12-14 13:01:12,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 12.133333333333333) internal successors, (182), 16 states have internal predecessors, (182), 9 states have call successors, (76), 9 states have call predecessors, (76), 11 states have return successors, (75), 12 states have call predecessors, (75), 9 states have call successors, (75) [2022-12-14 13:01:12,813 INFO L276 IsEmpty]: Start isEmpty. Operand 105365 states and 169009 transitions. [2022-12-14 13:01:12,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-12-14 13:01:12,827 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:01:12,827 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:01:12,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 13:01:13,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 13:01:13,028 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:01:13,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:01:13,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1144301227, now seen corresponding path program 1 times [2022-12-14 13:01:13,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:01:13,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359055421] [2022-12-14 13:01:13,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:01:13,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:01:13,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:01:13,144 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-12-14 13:01:13,144 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:01:13,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359055421] [2022-12-14 13:01:13,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359055421] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:01:13,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:01:13,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:01:13,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212445157] [2022-12-14 13:01:13,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:01:13,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:01:13,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:01:13,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:01:13,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:01:13,145 INFO L87 Difference]: Start difference. First operand 105365 states and 169009 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 13:01:22,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:01:22,320 INFO L93 Difference]: Finished difference Result 216817 states and 359937 transitions. [2022-12-14 13:01:22,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:01:22,321 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 186 [2022-12-14 13:01:22,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:01:22,891 INFO L225 Difference]: With dead ends: 216817 [2022-12-14 13:01:22,891 INFO L226 Difference]: Without dead ends: 114774 [2022-12-14 13:01:23,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:01:23,415 INFO L413 NwaCegarLoop]: 788 mSDtfsCounter, 102 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 1406 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:01:23,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 1406 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:01:23,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114774 states. [2022-12-14 13:01:30,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114774 to 105329. [2022-12-14 13:01:30,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105329 states, 76592 states have (on average 1.4727256110298725) internal successors, (112799), 79649 states have internal predecessors, (112799), 20264 states have call successors, (20264), 7682 states have call predecessors, (20264), 8472 states have return successors, (35886), 19495 states have call predecessors, (35886), 20196 states have call successors, (35886) [2022-12-14 13:01:31,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105329 states to 105329 states and 168949 transitions. [2022-12-14 13:01:31,349 INFO L78 Accepts]: Start accepts. Automaton has 105329 states and 168949 transitions. Word has length 186 [2022-12-14 13:01:31,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:01:31,350 INFO L495 AbstractCegarLoop]: Abstraction has 105329 states and 168949 transitions. [2022-12-14 13:01:31,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 13:01:31,350 INFO L276 IsEmpty]: Start isEmpty. Operand 105329 states and 168949 transitions. [2022-12-14 13:01:31,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-12-14 13:01:31,358 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:01:31,358 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:01:31,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 13:01:31,358 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:01:31,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:01:31,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1830921404, now seen corresponding path program 1 times [2022-12-14 13:01:31,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:01:31,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222598042] [2022-12-14 13:01:31,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:01:31,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:01:31,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:01:32,123 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 3 proven. 37 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-12-14 13:01:32,123 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:01:32,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222598042] [2022-12-14 13:01:32,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222598042] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:01:32,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058064188] [2022-12-14 13:01:32,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:01:32,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:01:32,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:01:32,124 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:01:32,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 13:01:32,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:01:32,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 2097 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 13:01:32,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:01:32,512 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 13:01:32,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:01:32,802 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-12-14 13:01:32,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058064188] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:01:32,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2094342152] [2022-12-14 13:01:32,807 INFO L159 IcfgInterpreter]: Started Sifa with 99 locations of interest [2022-12-14 13:01:32,807 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:01:32,807 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:01:32,807 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:01:32,807 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:01:38,517 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 690 for LOIs [2022-12-14 13:03:21,665 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 39 for LOIs [2022-12-14 13:03:21,667 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 55 for LOIs [2022-12-14 13:03:21,813 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 455 for LOIs [2022-12-14 13:03:22,952 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__weight with input of size 427 for LOIs [2022-12-14 13:03:23,539 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 68 for LOIs [2022-12-14 13:03:23,552 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 66 for LOIs [2022-12-14 13:03:23,566 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 601 for LOIs [2022-12-14 13:03:25,553 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 575 for LOIs [2022-12-14 13:03:25,748 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 90 for LOIs [2022-12-14 13:03:25,757 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 65 for LOIs [2022-12-14 13:03:25,771 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 60 for LOIs [2022-12-14 13:03:25,777 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 575 for LOIs [2022-12-14 13:03:29,005 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 579 for LOIs [2022-12-14 13:03:29,563 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 507 for LOIs [2022-12-14 13:03:29,701 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:04:13,660 WARN L233 SmtUtils]: Spent 8.91s on a formula simplification. DAG size of input: 690 DAG size of output: 622 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:04:22,759 WARN L233 SmtUtils]: Spent 8.71s on a formula simplification. DAG size of input: 633 DAG size of output: 604 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:04:32,866 WARN L233 SmtUtils]: Spent 9.20s on a formula simplification. DAG size of input: 654 DAG size of output: 613 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:04:41,404 WARN L233 SmtUtils]: Spent 8.11s on a formula simplification. DAG size of input: 659 DAG size of output: 609 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:04:51,104 WARN L233 SmtUtils]: Spent 8.95s on a formula simplification. DAG size of input: 673 DAG size of output: 617 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:05:01,613 WARN L233 SmtUtils]: Spent 10.04s on a formula simplification. DAG size of input: 673 DAG size of output: 619 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:05:11,814 WARN L233 SmtUtils]: Spent 9.22s on a formula simplification. DAG size of input: 674 DAG size of output: 618 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:05:22,924 WARN L233 SmtUtils]: Spent 9.90s on a formula simplification. DAG size of input: 682 DAG size of output: 614 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:05:32,897 WARN L233 SmtUtils]: Spent 9.38s on a formula simplification. DAG size of input: 676 DAG size of output: 618 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:05:43,109 WARN L233 SmtUtils]: Spent 9.09s on a formula simplification. DAG size of input: 674 DAG size of output: 617 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:05:54,167 WARN L233 SmtUtils]: Spent 10.29s on a formula simplification. DAG size of input: 684 DAG size of output: 615 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:06:02,716 WARN L233 SmtUtils]: Spent 7.91s on a formula simplification. DAG size of input: 681 DAG size of output: 613 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:06:13,877 WARN L233 SmtUtils]: Spent 9.87s on a formula simplification. DAG size of input: 679 DAG size of output: 614 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:06:24,686 WARN L233 SmtUtils]: Spent 10.13s on a formula simplification. DAG size of input: 690 DAG size of output: 624 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:06:34,573 WARN L233 SmtUtils]: Spent 9.22s on a formula simplification. DAG size of input: 687 DAG size of output: 617 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:07:09,662 WARN L233 SmtUtils]: Spent 5.93s on a formula simplification. DAG size of input: 651 DAG size of output: 597 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:07:38,439 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2403700#(and (= ~executiveFloor~0 4) (<= ~floorButtons_2~0 2147483647) (<= ~floorButtons_0~0 0) (<= 0 ~floorButtons_1~0) (= ~head~0.offset 0) (= ~currentHeading~0 1) (<= 0 (+ ~floorButtons_2~0 2147483648)) (<= 0 ~floorButtons_0~0) (= ~head~0.base 0) (= |#NULL.offset| 0) (= 0 (+ ~expectedDirection~0 1)) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (<= ~floorButtons_1~0 0) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 13:07:38,440 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:07:38,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:07:38,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12, 12] total 35 [2022-12-14 13:07:38,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50884093] [2022-12-14 13:07:38,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:07:38,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 13:07:38,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:07:38,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 13:07:38,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1387, Invalid=10603, Unknown=0, NotChecked=0, Total=11990 [2022-12-14 13:07:38,443 INFO L87 Difference]: Start difference. First operand 105329 states and 168949 transitions. Second operand has 35 states, 29 states have (on average 6.275862068965517) internal successors, (182), 29 states have internal predecessors, (182), 12 states have call successors, (67), 9 states have call predecessors, (67), 12 states have return successors, (68), 16 states have call predecessors, (68), 11 states have call successors, (68) [2022-12-14 13:08:11,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:08:11,820 INFO L93 Difference]: Finished difference Result 245556 states and 437233 transitions. [2022-12-14 13:08:11,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-12-14 13:08:11,821 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 29 states have (on average 6.275862068965517) internal successors, (182), 29 states have internal predecessors, (182), 12 states have call successors, (67), 9 states have call predecessors, (67), 12 states have return successors, (68), 16 states have call predecessors, (68), 11 states have call successors, (68) Word has length 189 [2022-12-14 13:08:11,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:08:12,909 INFO L225 Difference]: With dead ends: 245556 [2022-12-14 13:08:12,909 INFO L226 Difference]: Without dead ends: 140191 [2022-12-14 13:08:13,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 786 GetRequests, 520 SyntacticMatches, 21 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27609 ImplicationChecksByTransitivity, 253.2s TimeCoverageRelationStatistics Valid=6153, Invalid=54609, Unknown=0, NotChecked=0, Total=60762 [2022-12-14 13:08:13,652 INFO L413 NwaCegarLoop]: 884 mSDtfsCounter, 15098 mSDsluCounter, 8176 mSDsCounter, 0 mSdLazyCounter, 29718 mSolverCounterSat, 10260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15172 SdHoareTripleChecker+Valid, 9060 SdHoareTripleChecker+Invalid, 39978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 10260 IncrementalHoareTripleChecker+Valid, 29718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:08:13,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15172 Valid, 9060 Invalid, 39978 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [10260 Valid, 29718 Invalid, 0 Unknown, 0 Unchecked, 15.3s Time] [2022-12-14 13:08:13,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140191 states. [2022-12-14 13:08:24,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140191 to 128466. [2022-12-14 13:08:24,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128466 states, 91221 states have (on average 1.4163734227864198) internal successors, (129203), 95242 states have internal predecessors, (129203), 26106 states have call successors, (26106), 10286 states have call predecessors, (26106), 11138 states have return successors, (51098), 25013 states have call predecessors, (51098), 25998 states have call successors, (51098) [2022-12-14 13:08:25,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128466 states to 128466 states and 206407 transitions. [2022-12-14 13:08:25,517 INFO L78 Accepts]: Start accepts. Automaton has 128466 states and 206407 transitions. Word has length 189 [2022-12-14 13:08:25,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:08:25,517 INFO L495 AbstractCegarLoop]: Abstraction has 128466 states and 206407 transitions. [2022-12-14 13:08:25,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 29 states have (on average 6.275862068965517) internal successors, (182), 29 states have internal predecessors, (182), 12 states have call successors, (67), 9 states have call predecessors, (67), 12 states have return successors, (68), 16 states have call predecessors, (68), 11 states have call successors, (68) [2022-12-14 13:08:25,518 INFO L276 IsEmpty]: Start isEmpty. Operand 128466 states and 206407 transitions. [2022-12-14 13:08:25,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-12-14 13:08:25,535 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:08:25,536 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:08:25,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-14 13:08:25,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 13:08:25,737 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:08:25,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:08:25,737 INFO L85 PathProgramCache]: Analyzing trace with hash 338670643, now seen corresponding path program 1 times [2022-12-14 13:08:25,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:08:25,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857320876] [2022-12-14 13:08:25,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:08:25,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:08:25,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:08:26,327 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-12-14 13:08:26,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:08:26,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857320876] [2022-12-14 13:08:26,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857320876] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:08:26,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11054907] [2022-12-14 13:08:26,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:08:26,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:08:26,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:08:26,328 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:08:26,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146ade63-c853-4050-bfcf-f2bf9c752604/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 13:08:26,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:08:26,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 2199 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-14 13:08:26,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:08:26,829 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 113 proven. 6 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-14 13:08:26,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:08:27,727 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-12-14 13:08:27,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11054907] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:08:27,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1232407869] [2022-12-14 13:08:27,729 INFO L159 IcfgInterpreter]: Started Sifa with 123 locations of interest [2022-12-14 13:08:27,729 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:08:27,730 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:08:27,730 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:08:27,730 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:08:33,817 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 681 for LOIs [2022-12-14 13:08:41,632 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 32 for LOIs [2022-12-14 13:08:41,633 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 41 for LOIs [2022-12-14 13:08:41,720 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 53 for LOIs [2022-12-14 13:08:41,769 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__weight with input of size 53 for LOIs [2022-12-14 13:08:41,880 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 52 for LOIs [2022-12-14 13:08:41,892 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 52 for LOIs [2022-12-14 13:08:41,903 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 601 for LOIs [2022-12-14 13:08:43,893 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 575 for LOIs [2022-12-14 13:08:44,089 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 52 for LOIs [2022-12-14 13:08:44,094 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 48 for LOIs [2022-12-14 13:08:44,136 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 39 for LOIs [2022-12-14 13:08:44,138 INFO L197 IcfgInterpreter]: Interpreting procedure getReverseHeading with input of size 41 for LOIs [2022-12-14 13:08:44,140 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 58 for LOIs [2022-12-14 13:08:44,148 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 575 for LOIs [2022-12-14 13:08:47,434 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 579 for LOIs [2022-12-14 13:08:48,001 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 507 for LOIs [2022-12-14 13:08:48,138 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:09:57,211 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2937729#(and (= ~executiveFloor~0 4) (= ~currentHeading~0 0) (= ~head~0.offset 0) (<= ~floorButtons_1~0 2147483647) (= ~expectedDirection~0 1) (= ~head~0.base 0) (= |#NULL.offset| 0) (<= 0 (+ ~floorButtons_1~0 2147483648)) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 13:09:57,211 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:09:57,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:09:57,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 14] total 34 [2022-12-14 13:09:57,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849979779] [2022-12-14 13:09:57,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:09:57,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 13:09:57,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:09:57,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 13:09:57,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1025, Invalid=16005, Unknown=0, NotChecked=0, Total=17030 [2022-12-14 13:09:57,216 INFO L87 Difference]: Start difference. First operand 128466 states and 206407 transitions. Second operand has 34 states, 27 states have (on average 7.777777777777778) internal successors, (210), 28 states have internal predecessors, (210), 14 states have call successors, (88), 9 states have call predecessors, (88), 13 states have return successors, (86), 20 states have call predecessors, (86), 14 states have call successors, (86)