./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product23.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product23.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur --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 f91feaa60fbddcfc87f4cdb3911bff4dfabb88b0b67a46a205760e052b15032c --- 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-38b53e6 [2022-11-25 23:21:09,835 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:21:09,837 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:21:09,857 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:21:09,858 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:21:09,859 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:21:09,860 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:21:09,862 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:21:09,864 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:21:09,865 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:21:09,866 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:21:09,867 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:21:09,868 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:21:09,869 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:21:09,870 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:21:09,871 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:21:09,872 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:21:09,873 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:21:09,875 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:21:09,878 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:21:09,879 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:21:09,881 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:21:09,882 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:21:09,883 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:21:09,887 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:21:09,888 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:21:09,888 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:21:09,889 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:21:09,890 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:21:09,891 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:21:09,891 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:21:09,892 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:21:09,893 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:21:09,894 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:21:09,895 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:21:09,896 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:21:09,896 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:21:09,897 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:21:09,897 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:21:09,898 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:21:09,899 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:21:09,900 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 23:21:09,927 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:21:09,936 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:21:09,936 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:21:09,937 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:21:09,937 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:21:09,938 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:21:09,938 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:21:09,938 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:21:09,938 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:21:09,939 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:21:09,939 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:21:09,939 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:21:09,939 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:21:09,940 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:21:09,940 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:21:09,940 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:21:09,941 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:21:09,941 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:21:09,942 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:21:09,942 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:21:09,942 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:21:09,942 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:21:09,943 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:21:09,943 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:21:09,943 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:21:09,943 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:21:09,944 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:21:09,944 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:21:09,944 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:21:09,944 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:21:09,945 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:21:09,945 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:21:09,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:21:09,946 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:21:09,947 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:21:09,947 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:21:09,948 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:21:09,948 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:21:09,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:21:09,949 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:21:09,949 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:21:09,949 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_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f91feaa60fbddcfc87f4cdb3911bff4dfabb88b0b67a46a205760e052b15032c [2022-11-25 23:21:10,258 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:21:10,291 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:21:10,295 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:21:10,297 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:21:10,297 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:21:10,299 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/product-lines/elevator_spec3_product23.cil.c [2022-11-25 23:21:13,458 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:21:13,826 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:21:13,826 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/sv-benchmarks/c/product-lines/elevator_spec3_product23.cil.c [2022-11-25 23:21:13,853 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/data/826baeb8f/8476072a05f84c29b195d2397636242b/FLAG56806128c [2022-11-25 23:21:13,873 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/data/826baeb8f/8476072a05f84c29b195d2397636242b [2022-11-25 23:21:13,877 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:21:13,880 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:21:13,882 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:21:13,882 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:21:13,889 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:21:13,890 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:21:13" (1/1) ... [2022-11-25 23:21:13,892 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a0a1f38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:21:13, skipping insertion in model container [2022-11-25 23:21:13,892 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:21:13" (1/1) ... [2022-11-25 23:21:13,900 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:21:13,978 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:21:14,171 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_9954f9af-abfa-411d-b418-dcf37c15dd24/sv-benchmarks/c/product-lines/elevator_spec3_product23.cil.c[5798,5811] [2022-11-25 23:21:14,567 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:21:14,586 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:21:14,622 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_9954f9af-abfa-411d-b418-dcf37c15dd24/sv-benchmarks/c/product-lines/elevator_spec3_product23.cil.c[5798,5811] [2022-11-25 23:21:14,737 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:21:14,796 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:21:14,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:21:14 WrapperNode [2022-11-25 23:21:14,814 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:21:14,815 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:21:14,815 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:21:14,815 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:21:14,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:21:14" (1/1) ... [2022-11-25 23:21:14,901 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:21:14" (1/1) ... [2022-11-25 23:21:14,960 INFO L138 Inliner]: procedures = 94, calls = 353, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 945 [2022-11-25 23:21:14,961 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:21:14,962 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:21:14,962 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:21:14,962 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:21:14,971 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:21:14" (1/1) ... [2022-11-25 23:21:14,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:21:14" (1/1) ... [2022-11-25 23:21:14,976 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:21:14" (1/1) ... [2022-11-25 23:21:14,977 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:21:14" (1/1) ... [2022-11-25 23:21:14,995 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:21:14" (1/1) ... [2022-11-25 23:21:15,008 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:21:14" (1/1) ... [2022-11-25 23:21:15,013 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:21:14" (1/1) ... [2022-11-25 23:21:15,018 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:21:14" (1/1) ... [2022-11-25 23:21:15,026 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:21:15,027 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:21:15,028 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:21:15,028 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:21:15,029 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:21:14" (1/1) ... [2022-11-25 23:21:15,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:21:15,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:21:15,104 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:21:15,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:21:15,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:21:15,153 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-25 23:21:15,153 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-25 23:21:15,154 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-25 23:21:15,154 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-25 23:21:15,154 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-25 23:21:15,154 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-25 23:21:15,154 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-25 23:21:15,155 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-25 23:21:15,155 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-25 23:21:15,155 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-25 23:21:15,155 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-25 23:21:15,155 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-25 23:21:15,156 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-25 23:21:15,156 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-25 23:21:15,156 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-25 23:21:15,156 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-25 23:21:15,156 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-25 23:21:15,156 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-25 23:21:15,156 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-25 23:21:15,157 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-25 23:21:15,157 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-25 23:21:15,157 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-25 23:21:15,158 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-25 23:21:15,158 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-25 23:21:15,159 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-25 23:21:15,159 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-25 23:21:15,159 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-25 23:21:15,159 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-25 23:21:15,159 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-25 23:21:15,161 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-25 23:21:15,161 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-11-25 23:21:15,161 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-11-25 23:21:15,161 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-25 23:21:15,161 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-25 23:21:15,162 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-25 23:21:15,162 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-25 23:21:15,162 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-11-25 23:21:15,162 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-11-25 23:21:15,162 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-25 23:21:15,162 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-25 23:21:15,162 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-25 23:21:15,163 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-25 23:21:15,163 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-25 23:21:15,163 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-25 23:21:15,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:21:15,164 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-25 23:21:15,164 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-25 23:21:15,164 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-25 23:21:15,165 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-25 23:21:15,165 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-25 23:21:15,165 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-25 23:21:15,165 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-25 23:21:15,166 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-25 23:21:15,166 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2022-11-25 23:21:15,166 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2022-11-25 23:21:15,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:21:15,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:21:15,166 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-25 23:21:15,166 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-25 23:21:15,386 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:21:15,388 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:21:16,711 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:21:17,562 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:21:17,562 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 23:21:17,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:21:17 BoogieIcfgContainer [2022-11-25 23:21:17,568 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:21:17,574 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:21:17,574 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:21:17,578 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:21:17,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:21:13" (1/3) ... [2022-11-25 23:21:17,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@484f7d7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:21:17, skipping insertion in model container [2022-11-25 23:21:17,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:21:14" (2/3) ... [2022-11-25 23:21:17,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@484f7d7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:21:17, skipping insertion in model container [2022-11-25 23:21:17,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:21:17" (3/3) ... [2022-11-25 23:21:17,584 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product23.cil.c [2022-11-25 23:21:17,605 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:21:17,605 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 23:21:17,690 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:21:17,700 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;@4b3702a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:21:17,701 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 23:21:17,710 INFO L276 IsEmpty]: Start isEmpty. Operand has 427 states, 284 states have (on average 1.556338028169014) internal successors, (442), 302 states have internal predecessors, (442), 113 states have call successors, (113), 28 states have call predecessors, (113), 28 states have return successors, (113), 110 states have call predecessors, (113), 113 states have call successors, (113) [2022-11-25 23:21:17,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-25 23:21:17,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:21:17,746 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] [2022-11-25 23:21:17,747 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:21:17,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:21:17,755 INFO L85 PathProgramCache]: Analyzing trace with hash 639967327, now seen corresponding path program 1 times [2022-11-25 23:21:17,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:21:17,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008251563] [2022-11-25 23:21:17,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:21:17,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:21:18,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:21:18,762 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 23:21:18,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:21:18,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008251563] [2022-11-25 23:21:18,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008251563] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:21:18,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020506334] [2022-11-25 23:21:18,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:21:18,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:21:18,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:21:18,770 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:21:18,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:21:19,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:21:19,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 1584 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:21:19,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:21:19,300 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 23:21:19,300 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:21:19,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020506334] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:21:19,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:21:19,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-25 23:21:19,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227561671] [2022-11-25 23:21:19,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:21:19,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:21:19,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:21:19,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:21:19,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:21:19,343 INFO L87 Difference]: Start difference. First operand has 427 states, 284 states have (on average 1.556338028169014) internal successors, (442), 302 states have internal predecessors, (442), 113 states have call successors, (113), 28 states have call predecessors, (113), 28 states have return successors, (113), 110 states have call predecessors, (113), 113 states have call successors, (113) 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) [2022-11-25 23:21:19,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:21:19,724 INFO L93 Difference]: Finished difference Result 1204 states and 1908 transitions. [2022-11-25 23:21:19,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:21:19,726 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 [2022-11-25 23:21:19,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:21:19,744 INFO L225 Difference]: With dead ends: 1204 [2022-11-25 23:21:19,744 INFO L226 Difference]: Without dead ends: 779 [2022-11-25 23:21:19,755 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 [2022-11-25 23:21:19,762 INFO L413 NwaCegarLoop]: 1130 mSDtfsCounter, 600 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 1665 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:21:19,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [600 Valid, 1665 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:21:19,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-11-25 23:21:19,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 767. [2022-11-25 23:21:19,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 515 states have (on average 1.5475728155339805) internal successors, (797), 546 states have internal predecessors, (797), 201 states have call successors, (201), 51 states have call predecessors, (201), 50 states have return successors, (203), 195 states have call predecessors, (203), 198 states have call successors, (203) [2022-11-25 23:21:19,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1201 transitions. [2022-11-25 23:21:19,880 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1201 transitions. Word has length 87 [2022-11-25 23:21:19,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:21:19,881 INFO L495 AbstractCegarLoop]: Abstraction has 767 states and 1201 transitions. [2022-11-25 23:21:19,881 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) [2022-11-25 23:21:19,882 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1201 transitions. [2022-11-25 23:21:19,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-25 23:21:19,888 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:21:19,889 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] [2022-11-25 23:21:19,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 23:21:20,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-25 23:21:20,105 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:21:20,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:21:20,106 INFO L85 PathProgramCache]: Analyzing trace with hash 820372113, now seen corresponding path program 1 times [2022-11-25 23:21:20,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:21:20,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275178906] [2022-11-25 23:21:20,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:21:20,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:21:20,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:21:20,722 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 23:21:20,723 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:21:20,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275178906] [2022-11-25 23:21:20,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275178906] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:21:20,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:21:20,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 23:21:20,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356149195] [2022-11-25 23:21:20,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:21:20,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:21:20,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:21:20,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:21:20,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:21:20,733 INFO L87 Difference]: Start difference. First operand 767 states and 1201 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) [2022-11-25 23:21:22,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:21:22,016 INFO L93 Difference]: Finished difference Result 2712 states and 4406 transitions. [2022-11-25 23:21:22,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 23:21:22,017 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 [2022-11-25 23:21:22,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:21:22,040 INFO L225 Difference]: With dead ends: 2712 [2022-11-25 23:21:22,040 INFO L226 Difference]: Without dead ends: 1957 [2022-11-25 23:21:22,046 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 [2022-11-25 23:21:22,048 INFO L413 NwaCegarLoop]: 971 mSDtfsCounter, 869 mSDsluCounter, 3285 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 941 SdHoareTripleChecker+Valid, 4256 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:21:22,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [941 Valid, 4256 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 23:21:22,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2022-11-25 23:21:22,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1431. [2022-11-25 23:21:22,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1431 states, 980 states have (on average 1.5561224489795917) internal successors, (1525), 1039 states have internal predecessors, (1525), 359 states have call successors, (359), 92 states have call predecessors, (359), 91 states have return successors, (392), 339 states have call predecessors, (392), 355 states have call successors, (392) [2022-11-25 23:21:22,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1431 states to 1431 states and 2276 transitions. [2022-11-25 23:21:22,176 INFO L78 Accepts]: Start accepts. Automaton has 1431 states and 2276 transitions. Word has length 88 [2022-11-25 23:21:22,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:21:22,177 INFO L495 AbstractCegarLoop]: Abstraction has 1431 states and 2276 transitions. [2022-11-25 23:21:22,177 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) [2022-11-25 23:21:22,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states and 2276 transitions. [2022-11-25 23:21:22,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-25 23:21:22,182 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:21:22,182 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] [2022-11-25 23:21:22,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 23:21:22,183 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:21:22,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:21:22,184 INFO L85 PathProgramCache]: Analyzing trace with hash -776535547, now seen corresponding path program 1 times [2022-11-25 23:21:22,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:21:22,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528665291] [2022-11-25 23:21:22,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:21:22,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:21:22,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:21:22,609 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 23:21:22,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:21:22,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528665291] [2022-11-25 23:21:22,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528665291] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:21:22,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549403166] [2022-11-25 23:21:22,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:21:22,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:21:22,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:21:22,618 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:21:22,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:21:22,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:21:22,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 1585 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:21:23,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:21:23,124 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 23:21:23,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:21:23,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549403166] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:21:23,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:21:23,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-25 23:21:23,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33489913] [2022-11-25 23:21:23,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:21:23,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:21:23,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:21:23,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:21:23,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:21:23,128 INFO L87 Difference]: Start difference. First operand 1431 states and 2276 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) [2022-11-25 23:21:23,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:21:23,395 INFO L93 Difference]: Finished difference Result 3526 states and 5679 transitions. [2022-11-25 23:21:23,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:21:23,395 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 [2022-11-25 23:21:23,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:21:23,419 INFO L225 Difference]: With dead ends: 3526 [2022-11-25 23:21:23,419 INFO L226 Difference]: Without dead ends: 2107 [2022-11-25 23:21:23,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:21:23,435 INFO L413 NwaCegarLoop]: 1113 mSDtfsCounter, 591 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 1642 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:21:23,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [591 Valid, 1642 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:21:23,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2107 states. [2022-11-25 23:21:23,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2107 to 2062. [2022-11-25 23:21:23,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 1418 states have (on average 1.5585331452750353) internal successors, (2210), 1506 states have internal predecessors, (2210), 512 states have call successors, (512), 130 states have call predecessors, (512), 131 states have return successors, (568), 485 states have call predecessors, (568), 508 states have call successors, (568) [2022-11-25 23:21:23,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 3290 transitions. [2022-11-25 23:21:23,611 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 3290 transitions. Word has length 88 [2022-11-25 23:21:23,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:21:23,612 INFO L495 AbstractCegarLoop]: Abstraction has 2062 states and 3290 transitions. [2022-11-25 23:21:23,615 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) [2022-11-25 23:21:23,616 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 3290 transitions. [2022-11-25 23:21:23,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-25 23:21:23,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:21:23,622 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] [2022-11-25 23:21:23,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 23:21:23,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:21:23,831 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:21:23,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:21:23,831 INFO L85 PathProgramCache]: Analyzing trace with hash -682660095, now seen corresponding path program 1 times [2022-11-25 23:21:23,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:21:23,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704579752] [2022-11-25 23:21:23,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:21:23,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:21:23,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:21:24,148 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 23:21:24,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:21:24,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704579752] [2022-11-25 23:21:24,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704579752] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:21:24,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504184203] [2022-11-25 23:21:24,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:21:24,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:21:24,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:21:24,155 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:21:24,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 23:21:24,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:21:24,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 1597 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:21:24,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:21:24,549 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 23:21:24,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:21:24,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504184203] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:21:24,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:21:24,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-25 23:21:24,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519133862] [2022-11-25 23:21:24,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:21:24,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:21:24,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:21:24,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:21:24,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:21:24,553 INFO L87 Difference]: Start difference. First operand 2062 states and 3290 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-25 23:21:24,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:21:24,878 INFO L93 Difference]: Finished difference Result 4563 states and 7418 transitions. [2022-11-25 23:21:24,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:21:24,878 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), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 89 [2022-11-25 23:21:24,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:21:24,896 INFO L225 Difference]: With dead ends: 4563 [2022-11-25 23:21:24,897 INFO L226 Difference]: Without dead ends: 2513 [2022-11-25 23:21:24,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:21:24,918 INFO L413 NwaCegarLoop]: 686 mSDtfsCounter, 104 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 1279 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:21:24,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 1279 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:21:24,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2513 states. [2022-11-25 23:21:25,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2513 to 2090. [2022-11-25 23:21:25,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2090 states, 1442 states have (on average 1.552011095700416) internal successors, (2238), 1530 states have internal predecessors, (2238), 516 states have call successors, (516), 130 states have call predecessors, (516), 131 states have return successors, (572), 489 states have call predecessors, (572), 512 states have call successors, (572) [2022-11-25 23:21:25,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2090 states to 2090 states and 3326 transitions. [2022-11-25 23:21:25,093 INFO L78 Accepts]: Start accepts. Automaton has 2090 states and 3326 transitions. Word has length 89 [2022-11-25 23:21:25,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:21:25,096 INFO L495 AbstractCegarLoop]: Abstraction has 2090 states and 3326 transitions. [2022-11-25 23:21:25,096 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), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-25 23:21:25,096 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states and 3326 transitions. [2022-11-25 23:21:25,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-25 23:21:25,107 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:21:25,107 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] [2022-11-25 23:21:25,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 23:21:25,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:21:25,324 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:21:25,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:21:25,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1008596775, now seen corresponding path program 1 times [2022-11-25 23:21:25,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:21:25,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966354038] [2022-11-25 23:21:25,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:21:25,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:21:25,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:21:25,596 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-25 23:21:25,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:21:25,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966354038] [2022-11-25 23:21:25,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966354038] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:21:25,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424897442] [2022-11-25 23:21:25,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:21:25,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:21:25,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:21:25,598 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:21:25,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 23:21:25,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:21:25,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 1598 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:21:25,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:21:26,108 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 23:21:26,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:21:26,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424897442] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:21:26,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:21:26,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-25 23:21:26,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845579195] [2022-11-25 23:21:26,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:21:26,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:21:26,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:21:26,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:21:26,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-25 23:21:26,111 INFO L87 Difference]: Start difference. First operand 2090 states and 3326 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) [2022-11-25 23:21:27,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:21:27,459 INFO L93 Difference]: Finished difference Result 6048 states and 9920 transitions. [2022-11-25 23:21:27,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:21:27,460 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 [2022-11-25 23:21:27,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:21:27,492 INFO L225 Difference]: With dead ends: 6048 [2022-11-25 23:21:27,492 INFO L226 Difference]: Without dead ends: 3970 [2022-11-25 23:21:27,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:21:27,522 INFO L413 NwaCegarLoop]: 734 mSDtfsCounter, 662 mSDsluCounter, 2390 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 3124 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 23:21:27,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [722 Valid, 3124 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 23:21:27,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3970 states. [2022-11-25 23:21:27,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3970 to 3942. [2022-11-25 23:21:27,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3942 states, 2633 states have (on average 1.4899354348651728) internal successors, (3923), 2854 states have internal predecessors, (3923), 1077 states have call successors, (1077), 232 states have call predecessors, (1077), 231 states have return successors, (1271), 991 states have call predecessors, (1271), 1071 states have call successors, (1271) [2022-11-25 23:21:27,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3942 states to 3942 states and 6271 transitions. [2022-11-25 23:21:27,831 INFO L78 Accepts]: Start accepts. Automaton has 3942 states and 6271 transitions. Word has length 89 [2022-11-25 23:21:27,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:21:27,832 INFO L495 AbstractCegarLoop]: Abstraction has 3942 states and 6271 transitions. [2022-11-25 23:21:27,832 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) [2022-11-25 23:21:27,832 INFO L276 IsEmpty]: Start isEmpty. Operand 3942 states and 6271 transitions. [2022-11-25 23:21:27,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-25 23:21:27,835 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:21:27,836 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] [2022-11-25 23:21:27,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:21:28,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:21:28,044 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:21:28,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:21:28,044 INFO L85 PathProgramCache]: Analyzing trace with hash 422903505, now seen corresponding path program 1 times [2022-11-25 23:21:28,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:21:28,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608794017] [2022-11-25 23:21:28,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:21:28,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:21:28,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:21:28,822 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 23:21:28,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:21:28,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608794017] [2022-11-25 23:21:28,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608794017] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:21:28,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75890071] [2022-11-25 23:21:28,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:21:28,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:21:28,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:21:28,825 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:21:28,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 23:21:29,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:21:29,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 1612 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 23:21:29,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:21:29,498 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:21:29,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:21:29,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75890071] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:21:29,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:21:29,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 15 [2022-11-25 23:21:29,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261955346] [2022-11-25 23:21:29,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:21:29,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:21:29,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:21:29,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:21:29,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-11-25 23:21:29,501 INFO L87 Difference]: Start difference. First operand 3942 states and 6271 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) [2022-11-25 23:21:32,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:21:32,243 INFO L93 Difference]: Finished difference Result 9702 states and 15771 transitions. [2022-11-25 23:21:32,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 23:21:32,244 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 [2022-11-25 23:21:32,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:21:32,295 INFO L225 Difference]: With dead ends: 9702 [2022-11-25 23:21:32,295 INFO L226 Difference]: Without dead ends: 5772 [2022-11-25 23:21:32,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-25 23:21:32,331 INFO L413 NwaCegarLoop]: 854 mSDtfsCounter, 1647 mSDsluCounter, 1583 mSDsCounter, 0 mSdLazyCounter, 2135 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1703 SdHoareTripleChecker+Valid, 2437 SdHoareTripleChecker+Invalid, 2391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 2135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:21:32,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1703 Valid, 2437 Invalid, 2391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 2135 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-25 23:21:32,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5772 states. [2022-11-25 23:21:32,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5772 to 4326. [2022-11-25 23:21:32,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4326 states, 2917 states have (on average 1.4730887898525882) internal successors, (4297), 3146 states have internal predecessors, (4297), 1149 states have call successors, (1149), 264 states have call predecessors, (1149), 259 states have return successors, (1351), 1051 states have call predecessors, (1351), 1143 states have call successors, (1351) [2022-11-25 23:21:32,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4326 states to 4326 states and 6797 transitions. [2022-11-25 23:21:32,909 INFO L78 Accepts]: Start accepts. Automaton has 4326 states and 6797 transitions. Word has length 94 [2022-11-25 23:21:32,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:21:32,910 INFO L495 AbstractCegarLoop]: Abstraction has 4326 states and 6797 transitions. [2022-11-25 23:21:32,910 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) [2022-11-25 23:21:32,910 INFO L276 IsEmpty]: Start isEmpty. Operand 4326 states and 6797 transitions. [2022-11-25 23:21:32,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-25 23:21:32,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:21:32,914 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, 1, 1] [2022-11-25 23:21:32,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 23:21:33,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 23:21:33,124 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:21:33,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:21:33,125 INFO L85 PathProgramCache]: Analyzing trace with hash -822838838, now seen corresponding path program 1 times [2022-11-25 23:21:33,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:21:33,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088291453] [2022-11-25 23:21:33,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:21:33,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:21:33,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:21:33,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 23:21:33,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:21:33,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088291453] [2022-11-25 23:21:33,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088291453] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:21:33,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996189128] [2022-11-25 23:21:33,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:21:33,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:21:33,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:21:33,964 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:21:33,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 23:21:34,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:21:34,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 1636 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:21:34,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:21:34,443 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:21:34,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:21:34,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996189128] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:21:34,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:21:34,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-11-25 23:21:34,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407310693] [2022-11-25 23:21:34,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:21:34,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:21:34,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:21:34,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:21:34,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-25 23:21:34,447 INFO L87 Difference]: Start difference. First operand 4326 states and 6797 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 6 states have internal predecessors, (59), 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) [2022-11-25 23:21:35,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:21:35,335 INFO L93 Difference]: Finished difference Result 8963 states and 14386 transitions. [2022-11-25 23:21:35,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:21:35,335 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 6 states have internal predecessors, (59), 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 101 [2022-11-25 23:21:35,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:21:35,372 INFO L225 Difference]: With dead ends: 8963 [2022-11-25 23:21:35,372 INFO L226 Difference]: Without dead ends: 5502 [2022-11-25 23:21:35,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-11-25 23:21:35,391 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 141 mSDsluCounter, 3279 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 3959 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:21:35,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 3959 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:21:35,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5502 states. [2022-11-25 23:21:35,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5502 to 4560. [2022-11-25 23:21:35,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4560 states, 3079 states have (on average 1.4670347515427087) internal successors, (4517), 3329 states have internal predecessors, (4517), 1208 states have call successors, (1208), 264 states have call predecessors, (1208), 272 states have return successors, (1450), 1120 states have call predecessors, (1450), 1202 states have call successors, (1450) [2022-11-25 23:21:35,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4560 states to 4560 states and 7175 transitions. [2022-11-25 23:21:35,806 INFO L78 Accepts]: Start accepts. Automaton has 4560 states and 7175 transitions. Word has length 101 [2022-11-25 23:21:35,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:21:35,810 INFO L495 AbstractCegarLoop]: Abstraction has 4560 states and 7175 transitions. [2022-11-25 23:21:35,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 6 states have internal predecessors, (59), 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) [2022-11-25 23:21:35,811 INFO L276 IsEmpty]: Start isEmpty. Operand 4560 states and 7175 transitions. [2022-11-25 23:21:35,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-25 23:21:35,815 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:21:35,816 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] [2022-11-25 23:21:35,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-25 23:21:36,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:21:36,024 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:21:36,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:21:36,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1079055354, now seen corresponding path program 1 times [2022-11-25 23:21:36,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:21:36,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069550528] [2022-11-25 23:21:36,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:21:36,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:21:36,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:21:36,644 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-25 23:21:36,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:21:36,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069550528] [2022-11-25 23:21:36,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069550528] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:21:36,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083602946] [2022-11-25 23:21:36,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:21:36,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:21:36,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:21:36,660 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:21:36,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 23:21:37,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:21:37,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 1642 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 23:21:37,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:21:37,375 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 23:21:37,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:21:37,719 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-25 23:21:37,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083602946] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 23:21:37,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:21:37,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 20 [2022-11-25 23:21:37,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871775615] [2022-11-25 23:21:37,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:21:37,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 23:21:37,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:21:37,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 23:21:37,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-11-25 23:21:37,722 INFO L87 Difference]: Start difference. First operand 4560 states and 7175 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) [2022-11-25 23:21:42,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:21:42,638 INFO L93 Difference]: Finished difference Result 12536 states and 21072 transitions. [2022-11-25 23:21:42,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 23:21:42,639 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 [2022-11-25 23:21:42,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:21:42,708 INFO L225 Difference]: With dead ends: 12536 [2022-11-25 23:21:42,708 INFO L226 Difference]: Without dead ends: 9255 [2022-11-25 23:21:42,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 23:21:42,738 INFO L413 NwaCegarLoop]: 746 mSDtfsCounter, 2492 mSDsluCounter, 2748 mSDsCounter, 0 mSdLazyCounter, 3143 mSolverCounterSat, 1126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2586 SdHoareTripleChecker+Valid, 3494 SdHoareTripleChecker+Invalid, 4269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1126 IncrementalHoareTripleChecker+Valid, 3143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:21:42,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2586 Valid, 3494 Invalid, 4269 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1126 Valid, 3143 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-25 23:21:42,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9255 states. [2022-11-25 23:21:43,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9255 to 8039. [2022-11-25 23:21:43,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8039 states, 5642 states have (on average 1.467741935483871) internal successors, (8281), 5926 states have internal predecessors, (8281), 1831 states have call successors, (1831), 524 states have call predecessors, (1831), 565 states have return successors, (2845), 1732 states have call predecessors, (2845), 1823 states have call successors, (2845) [2022-11-25 23:21:43,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8039 states to 8039 states and 12957 transitions. [2022-11-25 23:21:43,607 INFO L78 Accepts]: Start accepts. Automaton has 8039 states and 12957 transitions. Word has length 103 [2022-11-25 23:21:43,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:21:43,608 INFO L495 AbstractCegarLoop]: Abstraction has 8039 states and 12957 transitions. [2022-11-25 23:21:43,609 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) [2022-11-25 23:21:43,610 INFO L276 IsEmpty]: Start isEmpty. Operand 8039 states and 12957 transitions. [2022-11-25 23:21:43,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-25 23:21:43,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:21:43,614 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] [2022-11-25 23:21:43,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 23:21:43,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 23:21:43,822 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:21:43,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:21:43,823 INFO L85 PathProgramCache]: Analyzing trace with hash -637393868, now seen corresponding path program 1 times [2022-11-25 23:21:43,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:21:43,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122646362] [2022-11-25 23:21:43,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:21:43,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:21:43,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:21:44,488 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-25 23:21:44,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:21:44,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122646362] [2022-11-25 23:21:44,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122646362] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:21:44,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850549297] [2022-11-25 23:21:44,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:21:44,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:21:44,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:21:44,494 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:21:44,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 23:21:44,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:21:44,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 1659 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 23:21:44,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:21:45,069 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 23:21:45,069 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:21:45,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850549297] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:21:45,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:21:45,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-11-25 23:21:45,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172831794] [2022-11-25 23:21:45,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:21:45,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:21:45,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:21:45,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:21:45,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-25 23:21:45,074 INFO L87 Difference]: Start difference. First operand 8039 states and 12957 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) [2022-11-25 23:21:46,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:21:46,360 INFO L93 Difference]: Finished difference Result 14813 states and 23958 transitions. [2022-11-25 23:21:46,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:21:46,361 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 [2022-11-25 23:21:46,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:21:46,432 INFO L225 Difference]: With dead ends: 14813 [2022-11-25 23:21:46,432 INFO L226 Difference]: Without dead ends: 8061 [2022-11-25 23:21:46,484 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 [2022-11-25 23:21:46,485 INFO L413 NwaCegarLoop]: 760 mSDtfsCounter, 448 mSDsluCounter, 1934 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 2694 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:21:46,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 2694 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:21:46,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8061 states. [2022-11-25 23:21:47,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8061 to 8039. [2022-11-25 23:21:47,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8039 states, 5642 states have (on average 1.467741935483871) internal successors, (8281), 5926 states have internal predecessors, (8281), 1831 states have call successors, (1831), 524 states have call predecessors, (1831), 565 states have return successors, (2837), 1732 states have call predecessors, (2837), 1823 states have call successors, (2837) [2022-11-25 23:21:47,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8039 states to 8039 states and 12949 transitions. [2022-11-25 23:21:47,366 INFO L78 Accepts]: Start accepts. Automaton has 8039 states and 12949 transitions. Word has length 107 [2022-11-25 23:21:47,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:21:47,367 INFO L495 AbstractCegarLoop]: Abstraction has 8039 states and 12949 transitions. [2022-11-25 23:21:47,367 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) [2022-11-25 23:21:47,368 INFO L276 IsEmpty]: Start isEmpty. Operand 8039 states and 12949 transitions. [2022-11-25 23:21:47,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-25 23:21:47,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:21:47,374 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] [2022-11-25 23:21:47,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 23:21:47,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:21:47,585 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:21:47,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:21:47,586 INFO L85 PathProgramCache]: Analyzing trace with hash -442084966, now seen corresponding path program 1 times [2022-11-25 23:21:47,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:21:47,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433587466] [2022-11-25 23:21:47,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:21:47,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:21:47,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:21:48,315 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 23:21:48,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:21:48,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433587466] [2022-11-25 23:21:48,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433587466] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:21:48,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195722628] [2022-11-25 23:21:48,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:21:48,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:21:48,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:21:48,317 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:21:48,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 23:21:48,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:21:48,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 1755 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 23:21:48,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:21:48,926 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-25 23:21:48,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:21:48,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195722628] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:21:48,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:21:48,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 11 [2022-11-25 23:21:48,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183151086] [2022-11-25 23:21:48,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:21:48,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:21:48,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:21:48,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:21:48,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-25 23:21:48,929 INFO L87 Difference]: Start difference. First operand 8039 states and 12949 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) [2022-11-25 23:21:51,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:21:51,616 INFO L93 Difference]: Finished difference Result 27069 states and 47241 transitions. [2022-11-25 23:21:51,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:21:51,617 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 [2022-11-25 23:21:51,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:21:51,761 INFO L225 Difference]: With dead ends: 27069 [2022-11-25 23:21:51,761 INFO L226 Difference]: Without dead ends: 19042 [2022-11-25 23:21:51,826 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 [2022-11-25 23:21:51,827 INFO L413 NwaCegarLoop]: 1019 mSDtfsCounter, 820 mSDsluCounter, 3123 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 4142 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:21:51,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [889 Valid, 4142 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-25 23:21:51,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19042 states. [2022-11-25 23:21:53,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19042 to 15950. [2022-11-25 23:21:53,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15950 states, 11230 states have (on average 1.4647373107747106) internal successors, (16449), 11810 states have internal predecessors, (16449), 3637 states have call successors, (3637), 997 states have call predecessors, (3637), 1082 states have return successors, (6801), 3388 states have call predecessors, (6801), 3625 states have call successors, (6801) [2022-11-25 23:21:53,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15950 states to 15950 states and 26887 transitions. [2022-11-25 23:21:53,830 INFO L78 Accepts]: Start accepts. Automaton has 15950 states and 26887 transitions. Word has length 134 [2022-11-25 23:21:53,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:21:53,831 INFO L495 AbstractCegarLoop]: Abstraction has 15950 states and 26887 transitions. [2022-11-25 23:21:53,831 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) [2022-11-25 23:21:53,831 INFO L276 IsEmpty]: Start isEmpty. Operand 15950 states and 26887 transitions. [2022-11-25 23:21:53,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-25 23:21:53,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:21:53,837 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] [2022-11-25 23:21:53,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 23:21:54,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:21:54,046 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:21:54,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:21:54,046 INFO L85 PathProgramCache]: Analyzing trace with hash -2082900144, now seen corresponding path program 1 times [2022-11-25 23:21:54,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:21:54,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304363857] [2022-11-25 23:21:54,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:21:54,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:21:54,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:21:54,969 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-25 23:21:54,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:21:54,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304363857] [2022-11-25 23:21:54,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304363857] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:21:54,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:21:54,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-25 23:21:54,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729226595] [2022-11-25 23:21:54,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:21:54,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 23:21:54,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:21:54,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 23:21:54,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-25 23:21:54,972 INFO L87 Difference]: Start difference. First operand 15950 states and 26887 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) [2022-11-25 23:22:05,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:22:05,631 INFO L93 Difference]: Finished difference Result 60500 states and 109628 transitions. [2022-11-25 23:22:05,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-25 23:22:05,632 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 [2022-11-25 23:22:05,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:22:06,118 INFO L225 Difference]: With dead ends: 60500 [2022-11-25 23:22:06,118 INFO L226 Difference]: Without dead ends: 44562 [2022-11-25 23:22:06,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=309, Invalid=1761, Unknown=0, NotChecked=0, Total=2070 [2022-11-25 23:22:06,300 INFO L413 NwaCegarLoop]: 541 mSDtfsCounter, 2873 mSDsluCounter, 4168 mSDsCounter, 0 mSdLazyCounter, 9444 mSolverCounterSat, 1244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2984 SdHoareTripleChecker+Valid, 4709 SdHoareTripleChecker+Invalid, 10688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1244 IncrementalHoareTripleChecker+Valid, 9444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:22:06,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2984 Valid, 4709 Invalid, 10688 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1244 Valid, 9444 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-11-25 23:22:06,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44562 states. [2022-11-25 23:22:09,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44562 to 39067. [2022-11-25 23:22:10,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39067 states, 28420 states have (on average 1.4686488388458832) internal successors, (41739), 29348 states have internal predecessors, (41739), 7556 states have call successors, (7556), 2813 states have call predecessors, (7556), 3090 states have return successors, (18377), 7331 states have call predecessors, (18377), 7536 states have call successors, (18377) [2022-11-25 23:22:10,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39067 states to 39067 states and 67672 transitions. [2022-11-25 23:22:10,712 INFO L78 Accepts]: Start accepts. Automaton has 39067 states and 67672 transitions. Word has length 140 [2022-11-25 23:22:10,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:22:10,717 INFO L495 AbstractCegarLoop]: Abstraction has 39067 states and 67672 transitions. [2022-11-25 23:22:10,717 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) [2022-11-25 23:22:10,718 INFO L276 IsEmpty]: Start isEmpty. Operand 39067 states and 67672 transitions. [2022-11-25 23:22:10,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-25 23:22:10,740 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:22:10,741 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 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] [2022-11-25 23:22:10,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 23:22:10,741 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:22:10,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:22:10,742 INFO L85 PathProgramCache]: Analyzing trace with hash 113785449, now seen corresponding path program 1 times [2022-11-25 23:22:10,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:22:10,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36153684] [2022-11-25 23:22:10,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:22:10,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:22:10,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:22:11,194 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-25 23:22:11,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:22:11,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36153684] [2022-11-25 23:22:11,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36153684] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:22:11,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:22:11,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:22:11,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225890738] [2022-11-25 23:22:11,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:22:11,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:22:11,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:22:11,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:22:11,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:22:11,197 INFO L87 Difference]: Start difference. First operand 39067 states and 67672 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) [2022-11-25 23:22:16,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:22:16,203 INFO L93 Difference]: Finished difference Result 91217 states and 159810 transitions. [2022-11-25 23:22:16,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:22:16,204 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 [2022-11-25 23:22:16,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:22:16,810 INFO L225 Difference]: With dead ends: 91217 [2022-11-25 23:22:16,811 INFO L226 Difference]: Without dead ends: 52162 [2022-11-25 23:22:17,188 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 [2022-11-25 23:22:17,188 INFO L413 NwaCegarLoop]: 833 mSDtfsCounter, 551 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 1436 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:22:17,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [551 Valid, 1436 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:22:17,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52162 states. [2022-11-25 23:22:21,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52162 to 51793. [2022-11-25 23:22:21,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51793 states, 37713 states have (on average 1.4690690212923925) internal successors, (55403), 38959 states have internal predecessors, (55403), 9970 states have call successors, (9970), 3722 states have call predecessors, (9970), 4109 states have return successors, (24445), 9681 states have call predecessors, (24445), 9950 states have call successors, (24445) [2022-11-25 23:22:21,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51793 states to 51793 states and 89818 transitions. [2022-11-25 23:22:21,858 INFO L78 Accepts]: Start accepts. Automaton has 51793 states and 89818 transitions. Word has length 173 [2022-11-25 23:22:21,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:22:21,859 INFO L495 AbstractCegarLoop]: Abstraction has 51793 states and 89818 transitions. [2022-11-25 23:22:21,859 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) [2022-11-25 23:22:21,859 INFO L276 IsEmpty]: Start isEmpty. Operand 51793 states and 89818 transitions. [2022-11-25 23:22:21,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-11-25 23:22:21,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:22:21,876 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 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] [2022-11-25 23:22:21,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 23:22:21,876 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:22:21,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:22:21,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1461742194, now seen corresponding path program 1 times [2022-11-25 23:22:21,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:22:21,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272704992] [2022-11-25 23:22:21,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:22:21,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:22:21,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:22:22,714 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-11-25 23:22:22,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:22:22,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272704992] [2022-11-25 23:22:22,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272704992] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:22:22,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771497038] [2022-11-25 23:22:22,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:22:22,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:22:22,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:22:22,717 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:22:22,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9954f9af-abfa-411d-b418-dcf37c15dd24/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 23:22:23,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:22:23,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 2072 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 23:22:23,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:22:23,242 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-25 23:22:23,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:22:23,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771497038] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:22:23,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:22:23,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 9 [2022-11-25 23:22:23,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247747589] [2022-11-25 23:22:23,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:22:23,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 23:22:23,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:22:23,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 23:22:23,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-25 23:22:23,246 INFO L87 Difference]: Start difference. First operand 51793 states and 89818 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) [2022-11-25 23:22:31,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:22:31,938 INFO L93 Difference]: Finished difference Result 137899 states and 242135 transitions. [2022-11-25 23:22:31,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 23:22:31,939 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 [2022-11-25 23:22:31,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:22:32,900 INFO L225 Difference]: With dead ends: 137899 [2022-11-25 23:22:32,900 INFO L226 Difference]: Without dead ends: 89533 [2022-11-25 23:22:33,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-11-25 23:22:33,198 INFO L413 NwaCegarLoop]: 763 mSDtfsCounter, 733 mSDsluCounter, 4639 mSDsCounter, 0 mSdLazyCounter, 1361 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 794 SdHoareTripleChecker+Valid, 5402 SdHoareTripleChecker+Invalid, 1497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:22:33,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [794 Valid, 5402 Invalid, 1497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1361 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-25 23:22:33,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89533 states.