./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_d0e7cc36-06a9-4688-9b49-f09bdfdb3234/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e7cc36-06a9-4688-9b49-f09bdfdb3234/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e7cc36-06a9-4688-9b49-f09bdfdb3234/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e7cc36-06a9-4688-9b49-f09bdfdb3234/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e7cc36-06a9-4688-9b49-f09bdfdb3234/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e7cc36-06a9-4688-9b49-f09bdfdb3234/bin/utaipan-g80aRyZoba --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 256d604ca5845ed70fae4c0c59880096896900821991ad09252cbc35739a584c --- 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-b5237d8 [2022-11-22 02:29:17,837 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:29:17,839 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:29:17,868 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:29:17,869 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:29:17,870 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:29:17,874 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:29:17,880 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:29:17,882 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:29:17,890 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:29:17,891 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:29:17,892 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:29:17,892 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:29:17,893 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:29:17,894 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:29:17,895 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:29:17,896 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:29:17,897 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:29:17,898 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:29:17,912 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:29:17,913 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:29:17,918 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:29:17,919 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:29:17,920 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:29:17,924 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:29:17,924 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:29:17,924 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:29:17,925 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:29:17,926 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:29:17,927 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:29:17,927 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:29:17,928 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:29:17,929 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:29:17,929 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:29:17,931 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:29:17,931 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:29:17,936 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:29:17,936 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:29:17,936 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:29:17,938 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:29:17,939 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:29:17,940 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e7cc36-06a9-4688-9b49-f09bdfdb3234/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 02:29:17,992 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:29:17,993 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:29:17,994 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:29:17,994 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:29:17,995 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:29:17,995 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:29:17,995 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:29:17,995 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:29:17,996 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:29:17,996 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:29:17,997 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:29:17,997 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:29:17,998 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:29:17,998 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:29:17,998 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:29:17,998 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:29:17,999 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:29:17,999 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:29:18,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:29:18,002 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:29:18,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:29:18,002 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:29:18,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:29:18,003 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:29:18,003 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:29:18,003 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:29:18,004 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:29:18,004 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:29:18,004 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:29:18,005 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:29:18,005 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:29:18,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:29:18,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:29:18,006 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:29:18,006 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:29:18,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:29:18,007 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:29:18,007 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:29:18,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:29:18,007 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:29:18,007 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:29:18,008 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_d0e7cc36-06a9-4688-9b49-f09bdfdb3234/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e7cc36-06a9-4688-9b49-f09bdfdb3234/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 256d604ca5845ed70fae4c0c59880096896900821991ad09252cbc35739a584c [2022-11-22 02:29:18,315 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:29:18,343 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:29:18,346 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:29:18,347 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:29:18,348 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:29:18,349 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e7cc36-06a9-4688-9b49-f09bdfdb3234/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c [2022-11-22 02:29:21,416 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:29:21,761 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:29:21,761 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e7cc36-06a9-4688-9b49-f09bdfdb3234/sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c [2022-11-22 02:29:21,796 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e7cc36-06a9-4688-9b49-f09bdfdb3234/bin/utaipan-g80aRyZoba/data/150b4786e/2099cf3a74e84f679eec96e935bd9a49/FLAGca4d6982c [2022-11-22 02:29:21,814 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e7cc36-06a9-4688-9b49-f09bdfdb3234/bin/utaipan-g80aRyZoba/data/150b4786e/2099cf3a74e84f679eec96e935bd9a49 [2022-11-22 02:29:21,822 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:29:21,824 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:29:21,827 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:29:21,827 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:29:21,834 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:29:21,835 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:29:21" (1/1) ... [2022-11-22 02:29:21,836 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55824ab2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:29:21, skipping insertion in model container [2022-11-22 02:29:21,836 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:29:21" (1/1) ... [2022-11-22 02:29:21,844 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:29:21,938 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:29:22,353 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_d0e7cc36-06a9-4688-9b49-f09bdfdb3234/sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c[40079,40092] [2022-11-22 02:29:22,457 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:29:22,470 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:29:22,537 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_d0e7cc36-06a9-4688-9b49-f09bdfdb3234/sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c[40079,40092] [2022-11-22 02:29:22,585 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:29:22,613 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:29:22,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:29:22 WrapperNode [2022-11-22 02:29:22,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:29:22,615 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:29:22,615 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:29:22,616 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:29:22,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:29:22" (1/1) ... [2022-11-22 02:29:22,657 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:29:22" (1/1) ... [2022-11-22 02:29:22,726 INFO L138 Inliner]: procedures = 99, calls = 355, calls flagged for inlining = 29, calls inlined = 25, statements flattened = 981 [2022-11-22 02:29:22,727 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:29:22,727 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:29:22,728 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:29:22,728 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:29:22,738 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:29:22" (1/1) ... [2022-11-22 02:29:22,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:29:22" (1/1) ... [2022-11-22 02:29:22,745 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:29:22" (1/1) ... [2022-11-22 02:29:22,745 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:29:22" (1/1) ... [2022-11-22 02:29:22,774 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:29:22" (1/1) ... [2022-11-22 02:29:22,788 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:29:22" (1/1) ... [2022-11-22 02:29:22,792 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:29:22" (1/1) ... [2022-11-22 02:29:22,797 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:29:22" (1/1) ... [2022-11-22 02:29:22,805 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:29:22,806 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:29:22,806 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:29:22,806 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:29:22,807 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:29:22" (1/1) ... [2022-11-22 02:29:22,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:29:22,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e7cc36-06a9-4688-9b49-f09bdfdb3234/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:29:22,849 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e7cc36-06a9-4688-9b49-f09bdfdb3234/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:29:22,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e7cc36-06a9-4688-9b49-f09bdfdb3234/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:29:22,942 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-22 02:29:22,942 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-22 02:29:22,943 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-22 02:29:22,943 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-22 02:29:22,943 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-22 02:29:22,943 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-22 02:29:22,943 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-11-22 02:29:22,943 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-11-22 02:29:22,944 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-22 02:29:22,944 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-22 02:29:22,944 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-22 02:29:22,944 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-22 02:29:22,944 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-22 02:29:22,944 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-22 02:29:22,944 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-22 02:29:22,945 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-22 02:29:22,945 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-22 02:29:22,945 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-22 02:29:22,945 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-22 02:29:22,945 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-22 02:29:22,945 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-22 02:29:22,945 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-22 02:29:22,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:29:22,947 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-22 02:29:22,947 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-22 02:29:22,948 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-22 02:29:22,948 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-22 02:29:22,948 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-22 02:29:22,948 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-22 02:29:22,949 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-22 02:29:22,950 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-22 02:29:22,950 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-22 02:29:22,951 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-22 02:29:22,951 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-22 02:29:22,951 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-22 02:29:22,951 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-22 02:29:22,951 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-22 02:29:22,952 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-22 02:29:22,952 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-22 02:29:22,952 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-22 02:29:22,952 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-22 02:29:22,952 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-22 02:29:22,953 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-22 02:29:22,953 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-22 02:29:22,953 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-22 02:29:22,953 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-22 02:29:22,954 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-22 02:29:22,954 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-22 02:29:22,954 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-22 02:29:22,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:29:22,955 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-22 02:29:22,955 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-22 02:29:22,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:29:22,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:29:22,956 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-22 02:29:22,956 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-22 02:29:22,957 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2022-11-22 02:29:22,957 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2022-11-22 02:29:23,169 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:29:23,172 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:29:24,540 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:29:25,482 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:29:25,483 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-22 02:29:25,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:29:25 BoogieIcfgContainer [2022-11-22 02:29:25,488 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:29:25,492 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:29:25,492 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:29:25,496 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:29:25,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:29:21" (1/3) ... [2022-11-22 02:29:25,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1067e583 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:29:25, skipping insertion in model container [2022-11-22 02:29:25,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:29:22" (2/3) ... [2022-11-22 02:29:25,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1067e583 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:29:25, skipping insertion in model container [2022-11-22 02:29:25,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:29:25" (3/3) ... [2022-11-22 02:29:25,502 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product32.cil.c [2022-11-22 02:29:25,523 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:29:25,523 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 02:29:25,618 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:29:25,625 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;@504d974d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:29:25,626 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 02:29:25,636 INFO L276 IsEmpty]: Start isEmpty. Operand has 406 states, 272 states have (on average 1.5735294117647058) internal successors, (428), 295 states have internal predecessors, (428), 105 states have call successors, (105), 27 states have call predecessors, (105), 27 states have return successors, (105), 98 states have call predecessors, (105), 105 states have call successors, (105) [2022-11-22 02:29:25,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-22 02:29:25,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:29:25,655 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:29:25,655 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:29:25,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:29:25,663 INFO L85 PathProgramCache]: Analyzing trace with hash 188925223, now seen corresponding path program 1 times [2022-11-22 02:29:25,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:29:25,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939201983] [2022-11-22 02:29:25,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:29:25,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:29:25,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:29:26,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:29:26,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:29:26,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939201983] [2022-11-22 02:29:26,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939201983] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:29:26,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:29:26,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:29:26,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282886064] [2022-11-22 02:29:26,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:29:26,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-22 02:29:26,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:29:26,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-22 02:29:26,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 02:29:26,255 INFO L87 Difference]: Start difference. First operand has 406 states, 272 states have (on average 1.5735294117647058) internal successors, (428), 295 states have internal predecessors, (428), 105 states have call successors, (105), 27 states have call predecessors, (105), 27 states have return successors, (105), 98 states have call predecessors, (105), 105 states have call successors, (105) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-22 02:29:26,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:29:26,472 INFO L93 Difference]: Finished difference Result 424 states and 665 transitions. [2022-11-22 02:29:26,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-22 02:29:26,474 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 43 [2022-11-22 02:29:26,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:29:26,492 INFO L225 Difference]: With dead ends: 424 [2022-11-22 02:29:26,492 INFO L226 Difference]: Without dead ends: 402 [2022-11-22 02:29:26,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 02:29:26,500 INFO L413 NwaCegarLoop]: 593 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:29:26,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 593 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:29:26,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-11-22 02:29:26,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 402. [2022-11-22 02:29:26,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 270 states have (on average 1.5629629629629629) internal successors, (422), 291 states have internal predecessors, (422), 105 states have call successors, (105), 27 states have call predecessors, (105), 26 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-22 02:29:26,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 627 transitions. [2022-11-22 02:29:26,708 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 627 transitions. Word has length 43 [2022-11-22 02:29:26,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:29:26,722 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 627 transitions. [2022-11-22 02:29:26,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-22 02:29:26,723 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 627 transitions. [2022-11-22 02:29:26,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-22 02:29:26,727 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:29:26,727 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:29:26,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:29:26,727 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:29:26,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:29:26,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1788741007, now seen corresponding path program 1 times [2022-11-22 02:29:26,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:29:26,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134668740] [2022-11-22 02:29:26,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:29:26,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:29:26,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:29:27,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:29:27,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:29:27,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134668740] [2022-11-22 02:29:27,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134668740] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:29:27,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:29:27,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 02:29:27,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900115063] [2022-11-22 02:29:27,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:29:27,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:29:27,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:29:27,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:29:27,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:29:27,541 INFO L87 Difference]: Start difference. First operand 402 states and 627 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-22 02:29:30,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:29:30,206 INFO L93 Difference]: Finished difference Result 1312 states and 2089 transitions. [2022-11-22 02:29:30,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:29:30,207 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 44 [2022-11-22 02:29:30,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:29:30,216 INFO L225 Difference]: With dead ends: 1312 [2022-11-22 02:29:30,216 INFO L226 Difference]: Without dead ends: 926 [2022-11-22 02:29:30,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:29:30,222 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 1289 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 1739 mSolverCounterSat, 472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1363 SdHoareTripleChecker+Valid, 1119 SdHoareTripleChecker+Invalid, 2211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 472 IncrementalHoareTripleChecker+Valid, 1739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:29:30,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1363 Valid, 1119 Invalid, 2211 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [472 Valid, 1739 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-22 02:29:30,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2022-11-22 02:29:30,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 839. [2022-11-22 02:29:30,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 586 states have (on average 1.5853242320819112) internal successors, (929), 616 states have internal predecessors, (929), 204 states have call successors, (204), 47 states have call predecessors, (204), 48 states have return successors, (206), 188 states have call predecessors, (206), 199 states have call successors, (206) [2022-11-22 02:29:30,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 1339 transitions. [2022-11-22 02:29:30,337 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 1339 transitions. Word has length 44 [2022-11-22 02:29:30,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:29:30,338 INFO L495 AbstractCegarLoop]: Abstraction has 839 states and 1339 transitions. [2022-11-22 02:29:30,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-22 02:29:30,338 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 1339 transitions. [2022-11-22 02:29:30,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-22 02:29:30,346 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:29:30,346 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-22 02:29:30,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 02:29:30,347 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:29:30,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:29:30,347 INFO L85 PathProgramCache]: Analyzing trace with hash 2139264353, now seen corresponding path program 1 times [2022-11-22 02:29:30,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:29:30,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965057133] [2022-11-22 02:29:30,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:29:30,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:29:30,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:29:30,858 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:29:30,859 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:29:30,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965057133] [2022-11-22 02:29:30,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965057133] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:29:30,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:29:30,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 02:29:30,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254050974] [2022-11-22 02:29:30,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:29:30,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 02:29:30,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:29:30,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 02:29:30,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:29:30,865 INFO L87 Difference]: Start difference. First operand 839 states and 1339 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-22 02:29:33,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:29:33,650 INFO L93 Difference]: Finished difference Result 2617 states and 4223 transitions. [2022-11-22 02:29:33,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 02:29:33,650 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 88 [2022-11-22 02:29:33,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:29:33,668 INFO L225 Difference]: With dead ends: 2617 [2022-11-22 02:29:33,668 INFO L226 Difference]: Without dead ends: 1795 [2022-11-22 02:29:33,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-22 02:29:33,682 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 1222 mSDsluCounter, 1276 mSDsCounter, 0 mSdLazyCounter, 2722 mSolverCounterSat, 462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1305 SdHoareTripleChecker+Valid, 1663 SdHoareTripleChecker+Invalid, 3184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 462 IncrementalHoareTripleChecker+Valid, 2722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:29:33,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1305 Valid, 1663 Invalid, 3184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [462 Valid, 2722 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-22 02:29:33,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1795 states. [2022-11-22 02:29:33,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1795 to 1708. [2022-11-22 02:29:33,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1203 states have (on average 1.5901911886949294) internal successors, (1913), 1259 states have internal predecessors, (1913), 406 states have call successors, (406), 91 states have call predecessors, (406), 98 states have return successors, (433), 381 states have call predecessors, (433), 401 states have call successors, (433) [2022-11-22 02:29:33,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 2752 transitions. [2022-11-22 02:29:33,856 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 2752 transitions. Word has length 88 [2022-11-22 02:29:33,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:29:33,859 INFO L495 AbstractCegarLoop]: Abstraction has 1708 states and 2752 transitions. [2022-11-22 02:29:33,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-22 02:29:33,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 2752 transitions. [2022-11-22 02:29:33,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-22 02:29:33,868 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:29:33,868 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-22 02:29:33,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 02:29:33,869 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:29:33,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:29:33,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1333133073, now seen corresponding path program 1 times [2022-11-22 02:29:33,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:29:33,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777205939] [2022-11-22 02:29:33,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:29:33,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:29:33,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:29:34,253 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:29:34,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:29:34,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777205939] [2022-11-22 02:29:34,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777205939] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:29:34,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:29:34,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-22 02:29:34,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266240034] [2022-11-22 02:29:34,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:29:34,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 02:29:34,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:29:34,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 02:29:34,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:29:34,259 INFO L87 Difference]: Start difference. First operand 1708 states and 2752 transitions. Second operand has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-22 02:29:38,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:29:38,180 INFO L93 Difference]: Finished difference Result 4684 states and 7540 transitions. [2022-11-22 02:29:38,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-22 02:29:38,181 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 91 [2022-11-22 02:29:38,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:29:38,204 INFO L225 Difference]: With dead ends: 4684 [2022-11-22 02:29:38,205 INFO L226 Difference]: Without dead ends: 2992 [2022-11-22 02:29:38,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-11-22 02:29:38,222 INFO L413 NwaCegarLoop]: 551 mSDtfsCounter, 1434 mSDsluCounter, 1609 mSDsCounter, 0 mSdLazyCounter, 4774 mSolverCounterSat, 732 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1516 SdHoareTripleChecker+Valid, 2160 SdHoareTripleChecker+Invalid, 5506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 732 IncrementalHoareTripleChecker+Valid, 4774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:29:38,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1516 Valid, 2160 Invalid, 5506 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [732 Valid, 4774 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-22 02:29:38,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2992 states. [2022-11-22 02:29:38,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2992 to 2797. [2022-11-22 02:29:38,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2797 states, 1921 states have (on average 1.5627277459656428) internal successors, (3002), 2020 states have internal predecessors, (3002), 711 states have call successors, (711), 144 states have call predecessors, (711), 164 states have return successors, (758), 676 states have call predecessors, (758), 706 states have call successors, (758) [2022-11-22 02:29:38,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2797 states to 2797 states and 4471 transitions. [2022-11-22 02:29:38,443 INFO L78 Accepts]: Start accepts. Automaton has 2797 states and 4471 transitions. Word has length 91 [2022-11-22 02:29:38,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:29:38,444 INFO L495 AbstractCegarLoop]: Abstraction has 2797 states and 4471 transitions. [2022-11-22 02:29:38,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-22 02:29:38,444 INFO L276 IsEmpty]: Start isEmpty. Operand 2797 states and 4471 transitions. [2022-11-22 02:29:38,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-22 02:29:38,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:29:38,448 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-22 02:29:38,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 02:29:38,448 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:29:38,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:29:38,449 INFO L85 PathProgramCache]: Analyzing trace with hash -139030049, now seen corresponding path program 1 times [2022-11-22 02:29:38,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:29:38,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590073585] [2022-11-22 02:29:38,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:29:38,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:29:38,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:29:38,823 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:29:38,823 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:29:38,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590073585] [2022-11-22 02:29:38,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590073585] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:29:38,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:29:38,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:29:38,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537598804] [2022-11-22 02:29:38,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:29:38,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:29:38,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:29:38,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:29:38,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:29:38,825 INFO L87 Difference]: Start difference. First operand 2797 states and 4471 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-22 02:29:40,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:29:40,789 INFO L93 Difference]: Finished difference Result 7504 states and 12117 transitions. [2022-11-22 02:29:40,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:29:40,790 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 92 [2022-11-22 02:29:40,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:29:40,824 INFO L225 Difference]: With dead ends: 7504 [2022-11-22 02:29:40,825 INFO L226 Difference]: Without dead ends: 4723 [2022-11-22 02:29:40,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:29:40,848 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 1239 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 403 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1317 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 1422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 403 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:29:40,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1317 Valid, 731 Invalid, 1422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [403 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-22 02:29:40,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4723 states. [2022-11-22 02:29:41,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4723 to 4382. [2022-11-22 02:29:41,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4382 states, 3018 states have (on average 1.5576540755467196) internal successors, (4701), 3181 states have internal predecessors, (4701), 1102 states have call successors, (1102), 216 states have call predecessors, (1102), 261 states have return successors, (1215), 1044 states have call predecessors, (1215), 1097 states have call successors, (1215) [2022-11-22 02:29:41,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4382 states to 4382 states and 7018 transitions. [2022-11-22 02:29:41,340 INFO L78 Accepts]: Start accepts. Automaton has 4382 states and 7018 transitions. Word has length 92 [2022-11-22 02:29:41,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:29:41,342 INFO L495 AbstractCegarLoop]: Abstraction has 4382 states and 7018 transitions. [2022-11-22 02:29:41,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-22 02:29:41,343 INFO L276 IsEmpty]: Start isEmpty. Operand 4382 states and 7018 transitions. [2022-11-22 02:29:41,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-22 02:29:41,353 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:29:41,353 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-22 02:29:41,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 02:29:41,354 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:29:41,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:29:41,354 INFO L85 PathProgramCache]: Analyzing trace with hash -15256274, now seen corresponding path program 1 times [2022-11-22 02:29:41,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:29:41,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115765515] [2022-11-22 02:29:41,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:29:41,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:29:41,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:29:41,756 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:29:41,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:29:41,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115765515] [2022-11-22 02:29:41,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115765515] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:29:41,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:29:41,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:29:41,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516229318] [2022-11-22 02:29:41,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:29:41,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:29:41,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:29:41,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:29:41,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:29:41,760 INFO L87 Difference]: Start difference. First operand 4382 states and 7018 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-22 02:29:44,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:29:44,289 INFO L93 Difference]: Finished difference Result 12119 states and 19668 transitions. [2022-11-22 02:29:44,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:29:44,292 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 93 [2022-11-22 02:29:44,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:29:44,351 INFO L225 Difference]: With dead ends: 12119 [2022-11-22 02:29:44,352 INFO L226 Difference]: Without dead ends: 7754 [2022-11-22 02:29:44,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:29:44,379 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 1226 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1303 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 1419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-22 02:29:44,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1303 Valid, 740 Invalid, 1419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-22 02:29:44,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7754 states. [2022-11-22 02:29:45,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7754 to 7359. [2022-11-22 02:29:45,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7359 states, 5083 states have (on average 1.5559708833366122) internal successors, (7909), 5386 states have internal predecessors, (7909), 1822 states have call successors, (1822), 360 states have call predecessors, (1822), 453 states have return successors, (2105), 1712 states have call predecessors, (2105), 1817 states have call successors, (2105) [2022-11-22 02:29:45,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7359 states to 7359 states and 11836 transitions. [2022-11-22 02:29:45,202 INFO L78 Accepts]: Start accepts. Automaton has 7359 states and 11836 transitions. Word has length 93 [2022-11-22 02:29:45,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:29:45,203 INFO L495 AbstractCegarLoop]: Abstraction has 7359 states and 11836 transitions. [2022-11-22 02:29:45,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-22 02:29:45,205 INFO L276 IsEmpty]: Start isEmpty. Operand 7359 states and 11836 transitions. [2022-11-22 02:29:45,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-22 02:29:45,217 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:29:45,217 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-22 02:29:45,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 02:29:45,218 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:29:45,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:29:45,218 INFO L85 PathProgramCache]: Analyzing trace with hash -473232639, now seen corresponding path program 1 times [2022-11-22 02:29:45,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:29:45,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376047833] [2022-11-22 02:29:45,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:29:45,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:29:45,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:29:45,489 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:29:45,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:29:45,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376047833] [2022-11-22 02:29:45,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376047833] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:29:45,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:29:45,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:29:45,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487700498] [2022-11-22 02:29:45,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:29:45,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:29:45,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:29:45,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:29:45,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:29:45,496 INFO L87 Difference]: Start difference. First operand 7359 states and 11836 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-22 02:29:48,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:29:48,463 INFO L93 Difference]: Finished difference Result 21120 states and 34681 transitions. [2022-11-22 02:29:48,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:29:48,463 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 94 [2022-11-22 02:29:48,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:29:48,577 INFO L225 Difference]: With dead ends: 21120 [2022-11-22 02:29:48,577 INFO L226 Difference]: Without dead ends: 13780 [2022-11-22 02:29:48,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:29:48,627 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 1213 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1289 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 1416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-22 02:29:48,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1289 Valid, 749 Invalid, 1416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 1015 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-22 02:29:48,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13780 states. [2022-11-22 02:29:49,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13780 to 13248. [2022-11-22 02:29:49,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13248 states, 9158 states have (on average 1.5521948023585936) internal successors, (14215), 9753 states have internal predecessors, (14215), 3240 states have call successors, (3240), 648 states have call predecessors, (3240), 849 states have return successors, (4043), 3026 states have call predecessors, (4043), 3235 states have call successors, (4043) [2022-11-22 02:29:50,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13248 states to 13248 states and 21498 transitions. [2022-11-22 02:29:50,033 INFO L78 Accepts]: Start accepts. Automaton has 13248 states and 21498 transitions. Word has length 94 [2022-11-22 02:29:50,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:29:50,034 INFO L495 AbstractCegarLoop]: Abstraction has 13248 states and 21498 transitions. [2022-11-22 02:29:50,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-22 02:29:50,035 INFO L276 IsEmpty]: Start isEmpty. Operand 13248 states and 21498 transitions. [2022-11-22 02:29:50,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-22 02:29:50,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:29:50,038 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:29:50,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 02:29:50,039 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:29:50,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:29:50,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1785594160, now seen corresponding path program 1 times [2022-11-22 02:29:50,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:29:50,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320075393] [2022-11-22 02:29:50,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:29:50,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:29:50,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:29:50,304 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:29:50,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:29:50,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320075393] [2022-11-22 02:29:50,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320075393] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:29:50,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:29:50,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:29:50,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960247789] [2022-11-22 02:29:50,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:29:50,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:29:50,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:29:50,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:29:50,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:29:50,306 INFO L87 Difference]: Start difference. First operand 13248 states and 21498 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-22 02:29:54,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:29:54,055 INFO L93 Difference]: Finished difference Result 38937 states and 65412 transitions. [2022-11-22 02:29:54,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:29:54,063 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 95 [2022-11-22 02:29:54,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:29:54,252 INFO L225 Difference]: With dead ends: 38937 [2022-11-22 02:29:54,252 INFO L226 Difference]: Without dead ends: 25712 [2022-11-22 02:29:54,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:29:54,324 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 1200 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1275 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 1412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:29:54,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1275 Valid, 761 Invalid, 1412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 1012 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-22 02:29:54,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25712 states. [2022-11-22 02:29:56,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25712 to 24877. [2022-11-22 02:29:57,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24877 states, 17185 states have (on average 1.546755891766075) internal successors, (26581), 18388 states have internal predecessors, (26581), 6026 states have call successors, (6026), 1224 states have call predecessors, (6026), 1665 states have return successors, (8481), 5604 states have call predecessors, (8481), 6021 states have call successors, (8481) [2022-11-22 02:29:57,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24877 states to 24877 states and 41088 transitions. [2022-11-22 02:29:57,165 INFO L78 Accepts]: Start accepts. Automaton has 24877 states and 41088 transitions. Word has length 95 [2022-11-22 02:29:57,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:29:57,166 INFO L495 AbstractCegarLoop]: Abstraction has 24877 states and 41088 transitions. [2022-11-22 02:29:57,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-22 02:29:57,166 INFO L276 IsEmpty]: Start isEmpty. Operand 24877 states and 41088 transitions. [2022-11-22 02:29:57,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-22 02:29:57,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:29:57,171 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-22 02:29:57,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 02:29:57,171 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:29:57,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:29:57,172 INFO L85 PathProgramCache]: Analyzing trace with hash 480875555, now seen corresponding path program 1 times [2022-11-22 02:29:57,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:29:57,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631400360] [2022-11-22 02:29:57,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:29:57,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:29:57,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:29:57,490 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:29:57,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:29:57,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631400360] [2022-11-22 02:29:57,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631400360] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:29:57,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:29:57,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:29:57,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204940454] [2022-11-22 02:29:57,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:29:57,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:29:57,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:29:57,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:29:57,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:29:57,494 INFO L87 Difference]: Start difference. First operand 24877 states and 41088 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-22 02:30:03,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:30:03,041 INFO L93 Difference]: Finished difference Result 74343 states and 130208 transitions. [2022-11-22 02:30:03,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:30:03,042 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 96 [2022-11-22 02:30:03,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:30:03,362 INFO L225 Difference]: With dead ends: 74343 [2022-11-22 02:30:03,363 INFO L226 Difference]: Without dead ends: 49487 [2022-11-22 02:30:03,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:30:03,481 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 1209 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1283 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-22 02:30:03,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1283 Valid, 754 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-22 02:30:03,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49487 states. [2022-11-22 02:30:07,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49487 to 47626. [2022-11-22 02:30:07,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47626 states, 32892 states have (on average 1.543506019700839) internal successors, (50769), 35263 states have internal predecessors, (50769), 11489 states have call successors, (11489), 2372 states have call predecessors, (11489), 3244 states have return successors, (18642), 10650 states have call predecessors, (18642), 11484 states have call successors, (18642) [2022-11-22 02:30:08,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47626 states to 47626 states and 80900 transitions. [2022-11-22 02:30:08,289 INFO L78 Accepts]: Start accepts. Automaton has 47626 states and 80900 transitions. Word has length 96 [2022-11-22 02:30:08,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:30:08,293 INFO L495 AbstractCegarLoop]: Abstraction has 47626 states and 80900 transitions. [2022-11-22 02:30:08,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-22 02:30:08,294 INFO L276 IsEmpty]: Start isEmpty. Operand 47626 states and 80900 transitions. [2022-11-22 02:30:08,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-22 02:30:08,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:30:08,304 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:30:08,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 02:30:08,305 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:30:08,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:30:08,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1711049652, now seen corresponding path program 1 times [2022-11-22 02:30:08,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:30:08,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550873712] [2022-11-22 02:30:08,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:30:08,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:30:08,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:30:08,613 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-22 02:30:08,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:30:08,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550873712] [2022-11-22 02:30:08,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550873712] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:30:08,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:30:08,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:30:08,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982384098] [2022-11-22 02:30:08,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:30:08,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:30:08,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:30:08,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:30:08,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:30:08,617 INFO L87 Difference]: Start difference. First operand 47626 states and 80900 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-22 02:30:12,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:30:12,876 INFO L93 Difference]: Finished difference Result 96918 states and 169438 transitions. [2022-11-22 02:30:12,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:30:12,877 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 144 [2022-11-22 02:30:12,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:30:13,364 INFO L225 Difference]: With dead ends: 96918 [2022-11-22 02:30:13,364 INFO L226 Difference]: Without dead ends: 49309 [2022-11-22 02:30:13,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:30:13,622 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 30 mSDsluCounter, 1161 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1759 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:30:13,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1759 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:30:13,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49309 states. [2022-11-22 02:30:17,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49309 to 47824. [2022-11-22 02:30:17,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47824 states, 33090 states have (on average 1.5402538531278331) internal successors, (50967), 35461 states have internal predecessors, (50967), 11489 states have call successors, (11489), 2372 states have call predecessors, (11489), 3244 states have return successors, (18642), 10650 states have call predecessors, (18642), 11484 states have call successors, (18642) [2022-11-22 02:30:18,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47824 states to 47824 states and 81098 transitions. [2022-11-22 02:30:18,186 INFO L78 Accepts]: Start accepts. Automaton has 47824 states and 81098 transitions. Word has length 144 [2022-11-22 02:30:18,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:30:18,186 INFO L495 AbstractCegarLoop]: Abstraction has 47824 states and 81098 transitions. [2022-11-22 02:30:18,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-22 02:30:18,187 INFO L276 IsEmpty]: Start isEmpty. Operand 47824 states and 81098 transitions. [2022-11-22 02:30:18,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-22 02:30:18,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:30:18,198 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:30:18,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-22 02:30:18,198 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:30:18,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:30:18,199 INFO L85 PathProgramCache]: Analyzing trace with hash 919613305, now seen corresponding path program 1 times [2022-11-22 02:30:18,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:30:18,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338264734] [2022-11-22 02:30:18,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:30:18,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:30:18,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:30:18,843 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-22 02:30:18,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:30:18,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338264734] [2022-11-22 02:30:18,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338264734] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:30:18,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943746972] [2022-11-22 02:30:18,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:30:18,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:30:18,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e7cc36-06a9-4688-9b49-f09bdfdb3234/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:30:18,848 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e7cc36-06a9-4688-9b49-f09bdfdb3234/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:30:18,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0e7cc36-06a9-4688-9b49-f09bdfdb3234/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 02:30:19,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:30:19,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 2080 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:30:19,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:30:19,527 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-22 02:30:19,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:30:19,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943746972] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:30:19,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:30:19,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2022-11-22 02:30:19,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808154467] [2022-11-22 02:30:19,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:30:19,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:30:19,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:30:19,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:30:19,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-11-22 02:30:19,546 INFO L87 Difference]: Start difference. First operand 47824 states and 81098 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25)