./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 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0dc0338-2ce5-46f6-8d9a-4a565f03b474/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0dc0338-2ce5-46f6-8d9a-4a565f03b474/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0dc0338-2ce5-46f6-8d9a-4a565f03b474/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0dc0338-2ce5-46f6-8d9a-4a565f03b474/bin/utaipan-ByfvJB40ur/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_f0dc0338-2ce5-46f6-8d9a-4a565f03b474/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0dc0338-2ce5-46f6-8d9a-4a565f03b474/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 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-38b53e6 [2022-11-26 00:27:36,860 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:27:36,862 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:27:36,888 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:27:36,891 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:27:36,894 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:27:36,899 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:27:36,901 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:27:36,902 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:27:36,903 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:27:36,904 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:27:36,905 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:27:36,906 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:27:36,907 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:27:36,908 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:27:36,909 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:27:36,910 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:27:36,911 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:27:36,913 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:27:36,915 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:27:36,916 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:27:36,928 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:27:36,929 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:27:36,930 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:27:36,933 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:27:36,934 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:27:36,934 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:27:36,935 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:27:36,935 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:27:36,936 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:27:36,936 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:27:36,937 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:27:36,938 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:27:36,944 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:27:36,945 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:27:36,946 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:27:36,946 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:27:36,947 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:27:36,947 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:27:36,948 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:27:36,949 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:27:36,952 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0dc0338-2ce5-46f6-8d9a-4a565f03b474/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:27:37,009 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:27:37,009 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:27:37,009 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:27:37,009 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:27:37,010 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:27:37,010 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:27:37,010 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:27:37,011 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:27:37,011 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:27:37,011 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:27:37,011 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:27:37,012 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:27:37,012 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:27:37,012 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:27:37,012 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:27:37,012 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:27:37,013 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:27:37,013 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:27:37,013 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:27:37,014 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:27:37,014 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:27:37,014 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:27:37,014 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:27:37,014 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:27:37,015 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:27:37,015 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:27:37,015 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:27:37,015 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:27:37,015 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:27:37,016 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:27:37,016 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:27:37,016 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:27:37,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:27:37,017 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:27:37,017 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:27:37,017 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:27:37,017 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:27:37,017 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:27:37,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:27:37,018 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:27:37,018 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:27:37,018 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_f0dc0338-2ce5-46f6-8d9a-4a565f03b474/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0dc0338-2ce5-46f6-8d9a-4a565f03b474/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 256d604ca5845ed70fae4c0c59880096896900821991ad09252cbc35739a584c [2022-11-26 00:27:37,331 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:27:37,359 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:27:37,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:27:37,363 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:27:37,364 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:27:37,365 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0dc0338-2ce5-46f6-8d9a-4a565f03b474/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c [2022-11-26 00:27:40,439 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:27:40,813 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:27:40,814 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0dc0338-2ce5-46f6-8d9a-4a565f03b474/sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c [2022-11-26 00:27:40,836 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0dc0338-2ce5-46f6-8d9a-4a565f03b474/bin/utaipan-ByfvJB40ur/data/1f62afac2/947c06b0f6f346cb8a78c899b071e0ea/FLAG9673de2dd [2022-11-26 00:27:40,851 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0dc0338-2ce5-46f6-8d9a-4a565f03b474/bin/utaipan-ByfvJB40ur/data/1f62afac2/947c06b0f6f346cb8a78c899b071e0ea [2022-11-26 00:27:40,854 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:27:40,855 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:27:40,857 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:27:40,857 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:27:40,862 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:27:40,862 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:27:40" (1/1) ... [2022-11-26 00:27:40,864 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f486f59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:27:40, skipping insertion in model container [2022-11-26 00:27:40,865 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:27:40" (1/1) ... [2022-11-26 00:27:40,872 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:27:40,957 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:27:41,428 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_f0dc0338-2ce5-46f6-8d9a-4a565f03b474/sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c[40079,40092] [2022-11-26 00:27:41,551 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:27:41,563 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:27:41,666 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_f0dc0338-2ce5-46f6-8d9a-4a565f03b474/sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c[40079,40092] [2022-11-26 00:27:41,725 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:27:41,764 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:27:41,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:27:41 WrapperNode [2022-11-26 00:27:41,765 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:27:41,767 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:27:41,767 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:27:41,767 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:27:41,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:27:41" (1/1) ... [2022-11-26 00:27:41,809 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:27:41" (1/1) ... [2022-11-26 00:27:41,876 INFO L138 Inliner]: procedures = 99, calls = 355, calls flagged for inlining = 29, calls inlined = 25, statements flattened = 981 [2022-11-26 00:27:41,876 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:27:41,877 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:27:41,877 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:27:41,877 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:27:41,896 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:27:41" (1/1) ... [2022-11-26 00:27:41,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:27:41" (1/1) ... [2022-11-26 00:27:41,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:27:41" (1/1) ... [2022-11-26 00:27:41,903 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:27:41" (1/1) ... [2022-11-26 00:27:41,938 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:27:41" (1/1) ... [2022-11-26 00:27:41,967 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:27:41" (1/1) ... [2022-11-26 00:27:41,988 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:27:41" (1/1) ... [2022-11-26 00:27:41,993 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:27:41" (1/1) ... [2022-11-26 00:27:42,001 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:27:42,002 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:27:42,002 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:27:42,002 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:27:42,019 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:27:41" (1/1) ... [2022-11-26 00:27:42,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:27:42,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0dc0338-2ce5-46f6-8d9a-4a565f03b474/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:27:42,061 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0dc0338-2ce5-46f6-8d9a-4a565f03b474/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:27:42,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0dc0338-2ce5-46f6-8d9a-4a565f03b474/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:27:42,103 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-26 00:27:42,103 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-26 00:27:42,103 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-26 00:27:42,104 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-26 00:27:42,104 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-26 00:27:42,104 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-26 00:27:42,104 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-11-26 00:27:42,104 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-11-26 00:27:42,104 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-26 00:27:42,105 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-26 00:27:42,105 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-26 00:27:42,105 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-26 00:27:42,105 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-26 00:27:42,105 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-26 00:27:42,105 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-26 00:27:42,106 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-26 00:27:42,106 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-26 00:27:42,107 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-26 00:27:42,107 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-26 00:27:42,107 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-26 00:27:42,107 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-26 00:27:42,107 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-26 00:27:42,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:27:42,108 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-26 00:27:42,109 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-26 00:27:42,109 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-26 00:27:42,110 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-26 00:27:42,110 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-26 00:27:42,110 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-26 00:27:42,110 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-26 00:27:42,110 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-26 00:27:42,110 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-26 00:27:42,111 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-26 00:27:42,111 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-26 00:27:42,111 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-26 00:27:42,111 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-26 00:27:42,112 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-26 00:27:42,112 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-26 00:27:42,112 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-26 00:27:42,112 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-26 00:27:42,112 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-26 00:27:42,112 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-26 00:27:42,113 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-26 00:27:42,113 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-26 00:27:42,113 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-26 00:27:42,113 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-26 00:27:42,114 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-26 00:27:42,114 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-26 00:27:42,114 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-26 00:27:42,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:27:42,116 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-26 00:27:42,116 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-26 00:27:42,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:27:42,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:27:42,117 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-26 00:27:42,117 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-26 00:27:42,118 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2022-11-26 00:27:42,118 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2022-11-26 00:27:42,334 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:27:42,337 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:27:43,640 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:27:44,555 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:27:44,556 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-26 00:27:44,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:27:44 BoogieIcfgContainer [2022-11-26 00:27:44,559 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:27:44,562 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:27:44,562 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:27:44,565 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:27:44,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:27:40" (1/3) ... [2022-11-26 00:27:44,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7834fdea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:27:44, skipping insertion in model container [2022-11-26 00:27:44,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:27:41" (2/3) ... [2022-11-26 00:27:44,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7834fdea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:27:44, skipping insertion in model container [2022-11-26 00:27:44,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:27:44" (3/3) ... [2022-11-26 00:27:44,569 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product32.cil.c [2022-11-26 00:27:44,590 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:27:44,590 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:27:44,653 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:27:44,660 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;@193415ef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:27:44,660 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:27:44,666 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) [2022-11-26 00:27:44,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-26 00:27:44,679 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:27:44,680 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] [2022-11-26 00:27:44,680 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:27:44,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:27:44,686 INFO L85 PathProgramCache]: Analyzing trace with hash 188925223, now seen corresponding path program 1 times [2022-11-26 00:27:44,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:27:44,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900884329] [2022-11-26 00:27:44,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:44,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:27:44,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:45,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:27:45,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:27:45,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900884329] [2022-11-26 00:27:45,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900884329] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:27:45,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:27:45,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:27:45,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783495816] [2022-11-26 00:27:45,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:27:45,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-26 00:27:45,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:27:45,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-26 00:27:45,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:27:45,174 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) [2022-11-26 00:27:45,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:27:45,400 INFO L93 Difference]: Finished difference Result 424 states and 665 transitions. [2022-11-26 00:27:45,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-26 00:27:45,404 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 [2022-11-26 00:27:45,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:27:45,433 INFO L225 Difference]: With dead ends: 424 [2022-11-26 00:27:45,435 INFO L226 Difference]: Without dead ends: 402 [2022-11-26 00:27:45,438 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 [2022-11-26 00:27:45,442 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 [2022-11-26 00:27:45,444 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] [2022-11-26 00:27:45,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-11-26 00:27:45,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 402. [2022-11-26 00:27:45,537 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) [2022-11-26 00:27:45,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 627 transitions. [2022-11-26 00:27:45,544 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 627 transitions. Word has length 43 [2022-11-26 00:27:45,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:27:45,546 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 627 transitions. [2022-11-26 00:27:45,548 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) [2022-11-26 00:27:45,548 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 627 transitions. [2022-11-26 00:27:45,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-26 00:27:45,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:27:45,555 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] [2022-11-26 00:27:45,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:27:45,557 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:27:45,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:27:45,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1788741007, now seen corresponding path program 1 times [2022-11-26 00:27:45,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:27:45,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916273848] [2022-11-26 00:27:45,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:45,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:27:45,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:46,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:27:46,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:27:46,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916273848] [2022-11-26 00:27:46,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916273848] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:27:46,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:27:46,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:27:46,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330255505] [2022-11-26 00:27:46,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:27:46,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:27:46,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:27:46,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:27:46,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:27:46,163 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) [2022-11-26 00:27:48,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:27:48,724 INFO L93 Difference]: Finished difference Result 1312 states and 2089 transitions. [2022-11-26 00:27:48,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:27:48,725 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 [2022-11-26 00:27:48,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:27:48,736 INFO L225 Difference]: With dead ends: 1312 [2022-11-26 00:27:48,737 INFO L226 Difference]: Without dead ends: 926 [2022-11-26 00:27:48,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:27:48,750 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 1288 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 1739 mSolverCounterSat, 470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1362 SdHoareTripleChecker+Valid, 1119 SdHoareTripleChecker+Invalid, 2209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 470 IncrementalHoareTripleChecker+Valid, 1739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:27:48,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1362 Valid, 1119 Invalid, 2209 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [470 Valid, 1739 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-26 00:27:48,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2022-11-26 00:27:48,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 839. [2022-11-26 00:27:48,853 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) [2022-11-26 00:27:48,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 1339 transitions. [2022-11-26 00:27:48,882 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 1339 transitions. Word has length 44 [2022-11-26 00:27:48,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:27:48,883 INFO L495 AbstractCegarLoop]: Abstraction has 839 states and 1339 transitions. [2022-11-26 00:27:48,883 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) [2022-11-26 00:27:48,883 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 1339 transitions. [2022-11-26 00:27:48,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-26 00:27:48,897 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:27:48,898 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] [2022-11-26 00:27:48,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:27:48,898 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:27:48,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:27:48,901 INFO L85 PathProgramCache]: Analyzing trace with hash 2139264353, now seen corresponding path program 1 times [2022-11-26 00:27:48,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:27:48,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257112947] [2022-11-26 00:27:48,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:48,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:27:48,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:49,401 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:27:49,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:27:49,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257112947] [2022-11-26 00:27:49,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257112947] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:27:49,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:27:49,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-26 00:27:49,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108342102] [2022-11-26 00:27:49,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:27:49,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:27:49,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:27:49,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:27:49,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:27:49,404 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) [2022-11-26 00:27:52,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:27:52,150 INFO L93 Difference]: Finished difference Result 2617 states and 4223 transitions. [2022-11-26 00:27:52,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 00:27:52,151 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 [2022-11-26 00:27:52,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:27:52,163 INFO L225 Difference]: With dead ends: 2617 [2022-11-26 00:27:52,164 INFO L226 Difference]: Without dead ends: 1795 [2022-11-26 00:27:52,169 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 [2022-11-26 00:27:52,170 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 1222 mSDsluCounter, 1276 mSDsCounter, 0 mSdLazyCounter, 2722 mSolverCounterSat, 462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s 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 [2022-11-26 00:27:52,170 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] [2022-11-26 00:27:52,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1795 states. [2022-11-26 00:27:52,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1795 to 1708. [2022-11-26 00:27:52,276 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) [2022-11-26 00:27:52,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 2752 transitions. [2022-11-26 00:27:52,292 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 2752 transitions. Word has length 88 [2022-11-26 00:27:52,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:27:52,293 INFO L495 AbstractCegarLoop]: Abstraction has 1708 states and 2752 transitions. [2022-11-26 00:27:52,293 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) [2022-11-26 00:27:52,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 2752 transitions. [2022-11-26 00:27:52,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-26 00:27:52,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:27:52,299 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] [2022-11-26 00:27:52,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:27:52,300 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:27:52,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:27:52,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1333133073, now seen corresponding path program 1 times [2022-11-26 00:27:52,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:27:52,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883209444] [2022-11-26 00:27:52,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:52,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:27:52,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:52,639 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:27:52,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:27:52,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883209444] [2022-11-26 00:27:52,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883209444] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:27:52,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:27:52,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-26 00:27:52,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486430318] [2022-11-26 00:27:52,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:27:52,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:27:52,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:27:52,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:27:52,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:27:52,642 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) [2022-11-26 00:27:56,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:27:56,460 INFO L93 Difference]: Finished difference Result 4684 states and 7540 transitions. [2022-11-26 00:27:56,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-26 00:27:56,461 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 [2022-11-26 00:27:56,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:27:56,484 INFO L225 Difference]: With dead ends: 4684 [2022-11-26 00:27:56,485 INFO L226 Difference]: Without dead ends: 2992 [2022-11-26 00:27:56,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-11-26 00:27:56,504 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, 0.0s SdHoareTripleChecker+Time, 732 IncrementalHoareTripleChecker+Valid, 4774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:27:56,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1516 Valid, 2160 Invalid, 5506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [732 Valid, 4774 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-26 00:27:56,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2992 states. [2022-11-26 00:27:56,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2992 to 2797. [2022-11-26 00:27:56,760 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) [2022-11-26 00:27:56,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2797 states to 2797 states and 4471 transitions. [2022-11-26 00:27:56,785 INFO L78 Accepts]: Start accepts. Automaton has 2797 states and 4471 transitions. Word has length 91 [2022-11-26 00:27:56,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:27:56,786 INFO L495 AbstractCegarLoop]: Abstraction has 2797 states and 4471 transitions. [2022-11-26 00:27:56,786 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) [2022-11-26 00:27:56,787 INFO L276 IsEmpty]: Start isEmpty. Operand 2797 states and 4471 transitions. [2022-11-26 00:27:56,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-26 00:27:56,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:27:56,790 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] [2022-11-26 00:27:56,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 00:27:56,791 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:27:56,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:27:56,792 INFO L85 PathProgramCache]: Analyzing trace with hash -139030049, now seen corresponding path program 1 times [2022-11-26 00:27:56,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:27:56,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117094421] [2022-11-26 00:27:56,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:56,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:27:56,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:57,131 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:27:57,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:27:57,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117094421] [2022-11-26 00:27:57,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117094421] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:27:57,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:27:57,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:27:57,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342971710] [2022-11-26 00:27:57,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:27:57,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:27:57,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:27:57,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:27:57,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:27:57,135 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) [2022-11-26 00:27:59,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:27:59,018 INFO L93 Difference]: Finished difference Result 7504 states and 12117 transitions. [2022-11-26 00:27:59,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:27:59,019 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 [2022-11-26 00:27:59,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:27:59,054 INFO L225 Difference]: With dead ends: 7504 [2022-11-26 00:27:59,054 INFO L226 Difference]: Without dead ends: 4723 [2022-11-26 00:27:59,077 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 [2022-11-26 00:27:59,079 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 1239 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 403 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:27:59,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1317 Valid, 731 Invalid, 1422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [403 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-26 00:27:59,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4723 states. [2022-11-26 00:27:59,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4723 to 4382. [2022-11-26 00:27:59,458 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) [2022-11-26 00:27:59,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4382 states to 4382 states and 7018 transitions. [2022-11-26 00:27:59,485 INFO L78 Accepts]: Start accepts. Automaton has 4382 states and 7018 transitions. Word has length 92 [2022-11-26 00:27:59,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:27:59,488 INFO L495 AbstractCegarLoop]: Abstraction has 4382 states and 7018 transitions. [2022-11-26 00:27:59,488 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) [2022-11-26 00:27:59,489 INFO L276 IsEmpty]: Start isEmpty. Operand 4382 states and 7018 transitions. [2022-11-26 00:27:59,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-26 00:27:59,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:27:59,497 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] [2022-11-26 00:27:59,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-26 00:27:59,498 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:27:59,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:27:59,498 INFO L85 PathProgramCache]: Analyzing trace with hash -15256274, now seen corresponding path program 1 times [2022-11-26 00:27:59,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:27:59,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716729113] [2022-11-26 00:27:59,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:59,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:27:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:59,839 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:27:59,839 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:27:59,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716729113] [2022-11-26 00:27:59,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716729113] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:27:59,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:27:59,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:27:59,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064816768] [2022-11-26 00:27:59,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:27:59,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:27:59,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:27:59,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:27:59,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:27:59,842 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) [2022-11-26 00:28:02,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:28:02,016 INFO L93 Difference]: Finished difference Result 12119 states and 19668 transitions. [2022-11-26 00:28:02,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:28:02,017 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 [2022-11-26 00:28:02,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:28:02,077 INFO L225 Difference]: With dead ends: 12119 [2022-11-26 00:28:02,077 INFO L226 Difference]: Without dead ends: 7754 [2022-11-26 00:28:02,107 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 [2022-11-26 00:28:02,108 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 1226 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:28:02,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1303 Valid, 740 Invalid, 1419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-26 00:28:02,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7754 states. [2022-11-26 00:28:02,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7754 to 7359. [2022-11-26 00:28:02,819 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) [2022-11-26 00:28:02,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7359 states to 7359 states and 11836 transitions. [2022-11-26 00:28:02,870 INFO L78 Accepts]: Start accepts. Automaton has 7359 states and 11836 transitions. Word has length 93 [2022-11-26 00:28:02,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:28:02,871 INFO L495 AbstractCegarLoop]: Abstraction has 7359 states and 11836 transitions. [2022-11-26 00:28:02,871 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) [2022-11-26 00:28:02,872 INFO L276 IsEmpty]: Start isEmpty. Operand 7359 states and 11836 transitions. [2022-11-26 00:28:02,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-26 00:28:02,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:28:02,875 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] [2022-11-26 00:28:02,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-26 00:28:02,876 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:28:02,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:28:02,876 INFO L85 PathProgramCache]: Analyzing trace with hash -473232639, now seen corresponding path program 1 times [2022-11-26 00:28:02,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:28:02,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114555352] [2022-11-26 00:28:02,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:02,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:28:02,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:03,125 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:28:03,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:28:03,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114555352] [2022-11-26 00:28:03,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114555352] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:28:03,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:28:03,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:28:03,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129825245] [2022-11-26 00:28:03,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:28:03,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:28:03,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:28:03,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:28:03,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:28:03,129 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) [2022-11-26 00:28:05,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:28:05,800 INFO L93 Difference]: Finished difference Result 21120 states and 34681 transitions. [2022-11-26 00:28:05,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:28:05,801 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 [2022-11-26 00:28:05,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:28:05,889 INFO L225 Difference]: With dead ends: 21120 [2022-11-26 00:28:05,889 INFO L226 Difference]: Without dead ends: 13780 [2022-11-26 00:28:05,930 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 [2022-11-26 00:28:05,931 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 1213 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:28:05,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1289 Valid, 749 Invalid, 1416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 1015 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-26 00:28:05,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13780 states. [2022-11-26 00:28:07,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13780 to 13248. [2022-11-26 00:28:07,227 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) [2022-11-26 00:28:07,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13248 states to 13248 states and 21498 transitions. [2022-11-26 00:28:07,304 INFO L78 Accepts]: Start accepts. Automaton has 13248 states and 21498 transitions. Word has length 94 [2022-11-26 00:28:07,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:28:07,305 INFO L495 AbstractCegarLoop]: Abstraction has 13248 states and 21498 transitions. [2022-11-26 00:28:07,306 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) [2022-11-26 00:28:07,306 INFO L276 IsEmpty]: Start isEmpty. Operand 13248 states and 21498 transitions. [2022-11-26 00:28:07,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-26 00:28:07,309 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:28:07,309 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] [2022-11-26 00:28:07,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-26 00:28:07,310 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:28:07,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:28:07,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1785594160, now seen corresponding path program 1 times [2022-11-26 00:28:07,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:28:07,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664192233] [2022-11-26 00:28:07,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:07,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:28:07,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:07,587 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:28:07,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:28:07,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664192233] [2022-11-26 00:28:07,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664192233] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:28:07,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:28:07,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:28:07,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137119188] [2022-11-26 00:28:07,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:28:07,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:28:07,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:28:07,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:28:07,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:28:07,589 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) [2022-11-26 00:28:11,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:28:11,121 INFO L93 Difference]: Finished difference Result 38937 states and 65412 transitions. [2022-11-26 00:28:11,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:28:11,121 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 [2022-11-26 00:28:11,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:28:11,294 INFO L225 Difference]: With dead ends: 38937 [2022-11-26 00:28:11,294 INFO L226 Difference]: Without dead ends: 25712 [2022-11-26 00:28:11,363 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 [2022-11-26 00:28:11,363 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 1200 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:28:11,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1275 Valid, 761 Invalid, 1412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 1012 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-26 00:28:11,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25712 states. [2022-11-26 00:28:13,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25712 to 24877. [2022-11-26 00:28:13,942 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) [2022-11-26 00:28:14,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24877 states to 24877 states and 41088 transitions. [2022-11-26 00:28:14,098 INFO L78 Accepts]: Start accepts. Automaton has 24877 states and 41088 transitions. Word has length 95 [2022-11-26 00:28:14,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:28:14,099 INFO L495 AbstractCegarLoop]: Abstraction has 24877 states and 41088 transitions. [2022-11-26 00:28:14,099 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) [2022-11-26 00:28:14,099 INFO L276 IsEmpty]: Start isEmpty. Operand 24877 states and 41088 transitions. [2022-11-26 00:28:14,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-26 00:28:14,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:28:14,103 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] [2022-11-26 00:28:14,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-26 00:28:14,103 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:28:14,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:28:14,104 INFO L85 PathProgramCache]: Analyzing trace with hash 480875555, now seen corresponding path program 1 times [2022-11-26 00:28:14,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:28:14,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214167039] [2022-11-26 00:28:14,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:14,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:28:14,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:14,397 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:28:14,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:28:14,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214167039] [2022-11-26 00:28:14,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214167039] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:28:14,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:28:14,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:28:14,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402380944] [2022-11-26 00:28:14,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:28:14,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:28:14,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:28:14,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:28:14,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:28:14,401 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) [2022-11-26 00:28:19,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:28:19,905 INFO L93 Difference]: Finished difference Result 74343 states and 130208 transitions. [2022-11-26 00:28:19,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:28:19,906 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 [2022-11-26 00:28:19,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:28:20,209 INFO L225 Difference]: With dead ends: 74343 [2022-11-26 00:28:20,210 INFO L226 Difference]: Without dead ends: 49487 [2022-11-26 00:28:20,325 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 [2022-11-26 00:28:20,327 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 1209 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:28:20,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1283 Valid, 754 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-26 00:28:20,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49487 states. [2022-11-26 00:28:25,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49487 to 47626. [2022-11-26 00:28:25,380 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) [2022-11-26 00:28:25,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47626 states to 47626 states and 80900 transitions. [2022-11-26 00:28:25,778 INFO L78 Accepts]: Start accepts. Automaton has 47626 states and 80900 transitions. Word has length 96 [2022-11-26 00:28:25,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:28:25,779 INFO L495 AbstractCegarLoop]: Abstraction has 47626 states and 80900 transitions. [2022-11-26 00:28:25,779 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) [2022-11-26 00:28:25,779 INFO L276 IsEmpty]: Start isEmpty. Operand 47626 states and 80900 transitions. [2022-11-26 00:28:25,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-26 00:28:25,789 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:28:25,789 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] [2022-11-26 00:28:25,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-26 00:28:25,790 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:28:25,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:28:25,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1711049652, now seen corresponding path program 1 times [2022-11-26 00:28:25,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:28:25,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131304197] [2022-11-26 00:28:25,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:25,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:28:25,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:26,121 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-26 00:28:26,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:28:26,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131304197] [2022-11-26 00:28:26,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131304197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:28:26,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:28:26,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:28:26,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847191336] [2022-11-26 00:28:26,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:28:26,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:28:26,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:28:26,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:28:26,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:28:26,125 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) [2022-11-26 00:28:30,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:28:30,406 INFO L93 Difference]: Finished difference Result 96918 states and 169438 transitions. [2022-11-26 00:28:30,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:28:30,410 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 [2022-11-26 00:28:30,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:28:30,869 INFO L225 Difference]: With dead ends: 96918 [2022-11-26 00:28:30,869 INFO L226 Difference]: Without dead ends: 49309 [2022-11-26 00:28:31,191 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 [2022-11-26 00:28:31,191 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, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:28:31,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1759 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:28:31,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49309 states. [2022-11-26 00:28:35,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49309 to 47824. [2022-11-26 00:28:35,763 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) [2022-11-26 00:28:36,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47824 states to 47824 states and 81098 transitions. [2022-11-26 00:28:36,053 INFO L78 Accepts]: Start accepts. Automaton has 47824 states and 81098 transitions. Word has length 144 [2022-11-26 00:28:36,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:28:36,054 INFO L495 AbstractCegarLoop]: Abstraction has 47824 states and 81098 transitions. [2022-11-26 00:28:36,054 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) [2022-11-26 00:28:36,054 INFO L276 IsEmpty]: Start isEmpty. Operand 47824 states and 81098 transitions. [2022-11-26 00:28:36,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-26 00:28:36,065 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:28:36,066 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] [2022-11-26 00:28:36,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-26 00:28:36,066 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:28:36,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:28:36,067 INFO L85 PathProgramCache]: Analyzing trace with hash 919613305, now seen corresponding path program 1 times [2022-11-26 00:28:36,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:28:36,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296615411] [2022-11-26 00:28:36,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:36,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:28:36,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:36,689 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-26 00:28:36,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:28:36,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296615411] [2022-11-26 00:28:36,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296615411] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:28:36,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870983281] [2022-11-26 00:28:36,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:36,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:28:36,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0dc0338-2ce5-46f6-8d9a-4a565f03b474/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:28:36,694 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0dc0338-2ce5-46f6-8d9a-4a565f03b474/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:28:36,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0dc0338-2ce5-46f6-8d9a-4a565f03b474/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:28:37,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:37,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 2080 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:28:37,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:28:37,577 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-26 00:28:37,591 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:28:37,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870983281] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:28:37,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:28:37,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2022-11-26 00:28:37,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041912465] [2022-11-26 00:28:37,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:28:37,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:28:37,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:28:37,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:28:37,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:28:37,593 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)