./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/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_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/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_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/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 f89a8ce65f650dd979d04d2db9dc53ba483e2a2b64be3f70ae15b036e4b11b5a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 22:30:34,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 22:30:34,942 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 22:30:34,968 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 22:30:34,969 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 22:30:34,970 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 22:30:34,972 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 22:30:34,974 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 22:30:34,976 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 22:30:34,977 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 22:30:34,978 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 22:30:34,980 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 22:30:34,980 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 22:30:34,981 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 22:30:34,984 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 22:30:34,985 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 22:30:34,986 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 22:30:34,987 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 22:30:34,989 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 22:30:34,991 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 22:30:34,993 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 22:30:34,995 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 22:30:34,996 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 22:30:34,997 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 22:30:35,001 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 22:30:35,002 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 22:30:35,002 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 22:30:35,003 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 22:30:35,004 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 22:30:35,005 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 22:30:35,005 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 22:30:35,006 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 22:30:35,007 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 22:30:35,008 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 22:30:35,009 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 22:30:35,010 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 22:30:35,011 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 22:30:35,011 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 22:30:35,011 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 22:30:35,012 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 22:30:35,013 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 22:30:35,014 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 22:30:35,040 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 22:30:35,041 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 22:30:35,041 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 22:30:35,041 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 22:30:35,042 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 22:30:35,043 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 22:30:35,043 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 22:30:35,043 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 22:30:35,044 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 22:30:35,044 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 22:30:35,044 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 22:30:35,044 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 22:30:35,045 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 22:30:35,045 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 22:30:35,045 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 22:30:35,046 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 22:30:35,046 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 22:30:35,047 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 22:30:35,047 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 22:30:35,048 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 22:30:35,048 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 22:30:35,049 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 22:30:35,049 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 22:30:35,049 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 22:30:35,050 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 22:30:35,050 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 22:30:35,050 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 22:30:35,051 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 22:30:35,051 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 22:30:35,051 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 22:30:35,052 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 22:30:35,052 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 22:30:35,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:30:35,053 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 22:30:35,053 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 22:30:35,053 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 22:30:35,054 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 22:30:35,054 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 22:30:35,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 22:30:35,054 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 22:30:35,055 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 22:30:35,055 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_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f89a8ce65f650dd979d04d2db9dc53ba483e2a2b64be3f70ae15b036e4b11b5a [2022-11-25 22:30:35,415 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 22:30:35,466 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 22:30:35,469 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 22:30:35,471 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 22:30:35,472 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 22:30:35,474 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c [2022-11-25 22:30:38,997 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 22:30:39,532 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 22:30:39,536 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c [2022-11-25 22:30:39,568 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/data/df9dd1cdb/b66fd2e612a54e1aadd1722e7ad3e1af/FLAGd0a3819b0 [2022-11-25 22:30:39,591 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/data/df9dd1cdb/b66fd2e612a54e1aadd1722e7ad3e1af [2022-11-25 22:30:39,596 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 22:30:39,599 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 22:30:39,604 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 22:30:39,605 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 22:30:39,609 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 22:30:39,610 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:30:39" (1/1) ... [2022-11-25 22:30:39,612 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@770c0eba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:30:39, skipping insertion in model container [2022-11-25 22:30:39,613 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:30:39" (1/1) ... [2022-11-25 22:30:39,622 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 22:30:39,717 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:30:39,924 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_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c[1811,1824] [2022-11-25 22:30:40,276 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:30:40,290 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 22:30:40,308 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_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c[1811,1824] [2022-11-25 22:30:40,471 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:30:40,508 INFO L208 MainTranslator]: Completed translation [2022-11-25 22:30:40,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:30:40 WrapperNode [2022-11-25 22:30:40,509 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 22:30:40,510 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 22:30:40,511 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 22:30:40,511 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 22:30:40,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:30:40" (1/1) ... [2022-11-25 22:30:40,553 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:30:40" (1/1) ... [2022-11-25 22:30:40,628 INFO L138 Inliner]: procedures = 92, calls = 344, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 839 [2022-11-25 22:30:40,629 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 22:30:40,630 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 22:30:40,630 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 22:30:40,630 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 22:30:40,642 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:30:40" (1/1) ... [2022-11-25 22:30:40,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:30:40" (1/1) ... [2022-11-25 22:30:40,654 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:30:40" (1/1) ... [2022-11-25 22:30:40,655 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:30:40" (1/1) ... [2022-11-25 22:30:40,700 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:30:40" (1/1) ... [2022-11-25 22:30:40,736 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:30:40" (1/1) ... [2022-11-25 22:30:40,741 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:30:40" (1/1) ... [2022-11-25 22:30:40,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:30:40" (1/1) ... [2022-11-25 22:30:40,772 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 22:30:40,773 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 22:30:40,773 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 22:30:40,773 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 22:30:40,774 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:30:40" (1/1) ... [2022-11-25 22:30:40,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:30:40,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:30:40,829 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 22:30:40,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 22:30:40,887 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2022-11-25 22:30:40,887 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2022-11-25 22:30:40,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 22:30:40,888 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-25 22:30:40,888 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-25 22:30:40,888 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-25 22:30:40,888 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-25 22:30:40,888 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2022-11-25 22:30:40,889 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2022-11-25 22:30:40,889 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-25 22:30:40,889 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-25 22:30:40,889 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-25 22:30:40,890 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-25 22:30:40,890 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-25 22:30:40,890 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-25 22:30:40,890 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-25 22:30:40,891 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-25 22:30:40,891 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-25 22:30:40,891 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-25 22:30:40,891 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-25 22:30:40,892 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-25 22:30:40,892 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-25 22:30:40,893 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-25 22:30:40,894 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-25 22:30:40,894 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-25 22:30:40,895 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-25 22:30:40,895 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-25 22:30:40,896 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-25 22:30:40,896 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-25 22:30:40,896 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-25 22:30:40,898 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-25 22:30:40,898 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-25 22:30:40,899 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-25 22:30:40,899 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-25 22:30:40,899 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-25 22:30:40,900 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-25 22:30:40,900 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-25 22:30:40,900 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-25 22:30:40,900 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-25 22:30:40,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 22:30:40,901 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-25 22:30:40,901 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-25 22:30:40,902 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-25 22:30:40,902 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-25 22:30:40,902 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-25 22:30:40,902 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-25 22:30:40,904 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-25 22:30:40,904 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-25 22:30:40,904 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2022-11-25 22:30:40,906 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2022-11-25 22:30:40,906 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2022-11-25 22:30:40,906 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2022-11-25 22:30:40,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 22:30:40,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 22:30:40,907 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-25 22:30:40,907 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-25 22:30:41,137 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 22:30:41,140 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 22:30:42,533 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 22:30:43,473 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 22:30:43,474 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-25 22:30:43,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:30:43 BoogieIcfgContainer [2022-11-25 22:30:43,481 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 22:30:43,484 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 22:30:43,485 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 22:30:43,488 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 22:30:43,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 10:30:39" (1/3) ... [2022-11-25 22:30:43,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70f1ab4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:30:43, skipping insertion in model container [2022-11-25 22:30:43,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:30:40" (2/3) ... [2022-11-25 22:30:43,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70f1ab4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:30:43, skipping insertion in model container [2022-11-25 22:30:43,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:30:43" (3/3) ... [2022-11-25 22:30:43,495 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product22.cil.c [2022-11-25 22:30:43,519 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 22:30:43,519 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 22:30:43,616 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 22:30:43,624 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;@14efb4c1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 22:30:43,625 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 22:30:43,637 INFO L276 IsEmpty]: Start isEmpty. Operand has 416 states, 286 states have (on average 1.597902097902098) internal successors, (457), 306 states have internal predecessors, (457), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) [2022-11-25 22:30:43,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-25 22:30:43,674 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:30:43,675 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:30:43,675 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:30:43,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:30:43,690 INFO L85 PathProgramCache]: Analyzing trace with hash 113876529, now seen corresponding path program 1 times [2022-11-25 22:30:43,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:30:43,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970924176] [2022-11-25 22:30:43,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:30:43,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:30:44,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:30:44,859 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 22:30:44,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:30:44,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970924176] [2022-11-25 22:30:44,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970924176] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:30:44,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:30:44,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 22:30:44,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329253781] [2022-11-25 22:30:44,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:30:44,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:30:44,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:30:44,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:30:44,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:30:44,943 INFO L87 Difference]: Start difference. First operand has 416 states, 286 states have (on average 1.597902097902098) internal successors, (457), 306 states have internal predecessors, (457), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-25 22:30:49,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:30:49,546 INFO L93 Difference]: Finished difference Result 1726 states and 2836 transitions. [2022-11-25 22:30:49,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:30:49,549 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 70 [2022-11-25 22:30:49,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:30:49,589 INFO L225 Difference]: With dead ends: 1726 [2022-11-25 22:30:49,592 INFO L226 Difference]: Without dead ends: 1311 [2022-11-25 22:30:49,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:30:49,609 INFO L413 NwaCegarLoop]: 932 mSDtfsCounter, 1572 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 2336 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1645 SdHoareTripleChecker+Valid, 1619 SdHoareTripleChecker+Invalid, 2670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 2336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:30:49,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1645 Valid, 1619 Invalid, 2670 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [334 Valid, 2336 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-11-25 22:30:49,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2022-11-25 22:30:49,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1198. [2022-11-25 22:30:49,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 868 states have (on average 1.596774193548387) internal successors, (1386), 903 states have internal predecessors, (1386), 268 states have call successors, (268), 62 states have call predecessors, (268), 61 states have return successors, (286), 247 states have call predecessors, (286), 264 states have call successors, (286) [2022-11-25 22:30:49,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 1940 transitions. [2022-11-25 22:30:49,871 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 1940 transitions. Word has length 70 [2022-11-25 22:30:49,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:30:49,878 INFO L495 AbstractCegarLoop]: Abstraction has 1198 states and 1940 transitions. [2022-11-25 22:30:49,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-25 22:30:49,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 1940 transitions. [2022-11-25 22:30:49,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-25 22:30:49,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:30:49,892 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-25 22:30:49,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 22:30:49,892 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:30:49,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:30:49,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1067359487, now seen corresponding path program 1 times [2022-11-25 22:30:49,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:30:49,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830040616] [2022-11-25 22:30:49,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:30:49,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:30:49,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:30:50,751 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 22:30:50,752 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:30:50,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830040616] [2022-11-25 22:30:50,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830040616] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:30:50,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:30:50,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 22:30:50,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700173147] [2022-11-25 22:30:50,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:30:50,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 22:30:50,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:30:50,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 22:30:50,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:30:50,759 INFO L87 Difference]: Start difference. First operand 1198 states and 1940 transitions. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 5 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-11-25 22:30:55,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:30:55,219 INFO L93 Difference]: Finished difference Result 4078 states and 6678 transitions. [2022-11-25 22:30:55,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 22:30:55,220 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 5 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 128 [2022-11-25 22:30:55,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:30:55,260 INFO L225 Difference]: With dead ends: 4078 [2022-11-25 22:30:55,260 INFO L226 Difference]: Without dead ends: 2895 [2022-11-25 22:30:55,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-11-25 22:30:55,276 INFO L413 NwaCegarLoop]: 582 mSDtfsCounter, 1284 mSDsluCounter, 1263 mSDsCounter, 0 mSdLazyCounter, 4461 mSolverCounterSat, 476 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1367 SdHoareTripleChecker+Valid, 1845 SdHoareTripleChecker+Invalid, 4937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 476 IncrementalHoareTripleChecker+Valid, 4461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-25 22:30:55,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1367 Valid, 1845 Invalid, 4937 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [476 Valid, 4461 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-25 22:30:55,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2895 states. [2022-11-25 22:30:55,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2895 to 2856. [2022-11-25 22:30:55,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2856 states, 2080 states have (on average 1.5576923076923077) internal successors, (3240), 2135 states have internal predecessors, (3240), 645 states have call successors, (645), 121 states have call predecessors, (645), 130 states have return successors, (771), 621 states have call predecessors, (771), 639 states have call successors, (771) [2022-11-25 22:30:55,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2856 states to 2856 states and 4656 transitions. [2022-11-25 22:30:55,525 INFO L78 Accepts]: Start accepts. Automaton has 2856 states and 4656 transitions. Word has length 128 [2022-11-25 22:30:55,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:30:55,525 INFO L495 AbstractCegarLoop]: Abstraction has 2856 states and 4656 transitions. [2022-11-25 22:30:55,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 5 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-11-25 22:30:55,526 INFO L276 IsEmpty]: Start isEmpty. Operand 2856 states and 4656 transitions. [2022-11-25 22:30:55,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-25 22:30:55,530 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:30:55,530 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-25 22:30:55,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 22:30:55,531 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:30:55,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:30:55,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1760886813, now seen corresponding path program 1 times [2022-11-25 22:30:55,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:30:55,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166066237] [2022-11-25 22:30:55,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:30:55,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:30:55,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:30:56,253 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 22:30:56,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:30:56,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166066237] [2022-11-25 22:30:56,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166066237] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:30:56,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219728379] [2022-11-25 22:30:56,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:30:56,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:30:56,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:30:56,267 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:30:56,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 22:30:56,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:30:56,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 2116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 22:30:56,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:30:57,122 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 22:30:57,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:30:57,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219728379] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:30:57,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:30:57,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 9 [2022-11-25 22:30:57,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624927319] [2022-11-25 22:30:57,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:30:57,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 22:30:57,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:30:57,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 22:30:57,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-25 22:30:57,139 INFO L87 Difference]: Start difference. First operand 2856 states and 4656 transitions. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 5 states have call successors, (23), 4 states have call predecessors, (23), 6 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2022-11-25 22:31:02,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:31:02,467 INFO L93 Difference]: Finished difference Result 8633 states and 14153 transitions. [2022-11-25 22:31:02,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 22:31:02,468 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 5 states have call successors, (23), 4 states have call predecessors, (23), 6 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 130 [2022-11-25 22:31:02,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:31:02,511 INFO L225 Difference]: With dead ends: 8633 [2022-11-25 22:31:02,511 INFO L226 Difference]: Without dead ends: 5794 [2022-11-25 22:31:02,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-11-25 22:31:02,539 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 1831 mSDsluCounter, 2063 mSDsCounter, 0 mSdLazyCounter, 5013 mSolverCounterSat, 616 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1915 SdHoareTripleChecker+Valid, 2457 SdHoareTripleChecker+Invalid, 5629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 616 IncrementalHoareTripleChecker+Valid, 5013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:31:02,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1915 Valid, 2457 Invalid, 5629 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [616 Valid, 5013 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-25 22:31:02,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5794 states. [2022-11-25 22:31:03,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5794 to 4861. [2022-11-25 22:31:03,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4861 states, 3583 states have (on average 1.5796818308679876) internal successors, (5660), 3659 states have internal predecessors, (5660), 1026 states have call successors, (1026), 217 states have call predecessors, (1026), 251 states have return successors, (1247), 1017 states have call predecessors, (1247), 1018 states have call successors, (1247) [2022-11-25 22:31:03,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4861 states to 4861 states and 7933 transitions. [2022-11-25 22:31:03,079 INFO L78 Accepts]: Start accepts. Automaton has 4861 states and 7933 transitions. Word has length 130 [2022-11-25 22:31:03,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:31:03,081 INFO L495 AbstractCegarLoop]: Abstraction has 4861 states and 7933 transitions. [2022-11-25 22:31:03,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 5 states have call successors, (23), 4 states have call predecessors, (23), 6 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2022-11-25 22:31:03,082 INFO L276 IsEmpty]: Start isEmpty. Operand 4861 states and 7933 transitions. [2022-11-25 22:31:03,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-25 22:31:03,086 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:31:03,086 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:31:03,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 22:31:03,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-25 22:31:03,297 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:31:03,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:31:03,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1627514483, now seen corresponding path program 1 times [2022-11-25 22:31:03,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:31:03,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572074650] [2022-11-25 22:31:03,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:31:03,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:31:03,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:31:03,705 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 22:31:03,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:31:03,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572074650] [2022-11-25 22:31:03,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572074650] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:31:03,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:31:03,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 22:31:03,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836603882] [2022-11-25 22:31:03,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:31:03,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 22:31:03,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:31:03,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 22:31:03,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:31:03,709 INFO L87 Difference]: Start difference. First operand 4861 states and 7933 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-25 22:31:04,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:31:04,383 INFO L93 Difference]: Finished difference Result 8684 states and 14242 transitions. [2022-11-25 22:31:04,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 22:31:04,384 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 93 [2022-11-25 22:31:04,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:31:04,424 INFO L225 Difference]: With dead ends: 8684 [2022-11-25 22:31:04,424 INFO L226 Difference]: Without dead ends: 5029 [2022-11-25 22:31:04,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:31:04,466 INFO L413 NwaCegarLoop]: 615 mSDtfsCounter, 6 mSDsluCounter, 3029 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3644 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:31:04,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 3644 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:31:04,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5029 states. [2022-11-25 22:31:04,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5029 to 4966. [2022-11-25 22:31:04,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4966 states, 3658 states have (on average 1.5677966101694916) internal successors, (5735), 3734 states have internal predecessors, (5735), 1026 states have call successors, (1026), 217 states have call predecessors, (1026), 281 states have return successors, (1322), 1047 states have call predecessors, (1322), 1018 states have call successors, (1322) [2022-11-25 22:31:05,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4966 states to 4966 states and 8083 transitions. [2022-11-25 22:31:05,008 INFO L78 Accepts]: Start accepts. Automaton has 4966 states and 8083 transitions. Word has length 93 [2022-11-25 22:31:05,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:31:05,009 INFO L495 AbstractCegarLoop]: Abstraction has 4966 states and 8083 transitions. [2022-11-25 22:31:05,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-25 22:31:05,009 INFO L276 IsEmpty]: Start isEmpty. Operand 4966 states and 8083 transitions. [2022-11-25 22:31:05,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-25 22:31:05,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:31:05,016 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:31:05,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 22:31:05,016 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:31:05,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:31:05,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1804285504, now seen corresponding path program 1 times [2022-11-25 22:31:05,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:31:05,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771374041] [2022-11-25 22:31:05,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:31:05,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:31:05,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:31:05,508 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 22:31:05,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:31:05,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771374041] [2022-11-25 22:31:05,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771374041] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:31:05,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:31:05,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 22:31:05,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853802604] [2022-11-25 22:31:05,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:31:05,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 22:31:05,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:31:05,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 22:31:05,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:31:05,512 INFO L87 Difference]: Start difference. First operand 4966 states and 8083 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-25 22:31:06,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:31:06,144 INFO L93 Difference]: Finished difference Result 8843 states and 14452 transitions. [2022-11-25 22:31:06,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 22:31:06,147 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 92 [2022-11-25 22:31:06,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:31:06,272 INFO L225 Difference]: With dead ends: 8843 [2022-11-25 22:31:06,272 INFO L226 Difference]: Without dead ends: 5104 [2022-11-25 22:31:06,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:31:06,303 INFO L413 NwaCegarLoop]: 610 mSDtfsCounter, 7 mSDsluCounter, 3010 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 3620 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:31:06,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 3620 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:31:06,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5104 states. [2022-11-25 22:31:06,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5104 to 4981. [2022-11-25 22:31:06,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4981 states, 3673 states have (on average 1.5654778110536347) internal successors, (5750), 3734 states have internal predecessors, (5750), 1026 states have call successors, (1026), 217 states have call predecessors, (1026), 281 states have return successors, (1322), 1062 states have call predecessors, (1322), 1018 states have call successors, (1322) [2022-11-25 22:31:06,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4981 states to 4981 states and 8098 transitions. [2022-11-25 22:31:06,800 INFO L78 Accepts]: Start accepts. Automaton has 4981 states and 8098 transitions. Word has length 92 [2022-11-25 22:31:06,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:31:06,801 INFO L495 AbstractCegarLoop]: Abstraction has 4981 states and 8098 transitions. [2022-11-25 22:31:06,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-25 22:31:06,802 INFO L276 IsEmpty]: Start isEmpty. Operand 4981 states and 8098 transitions. [2022-11-25 22:31:06,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-25 22:31:06,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:31:06,807 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:31:06,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 22:31:06,808 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:31:06,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:31:06,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1804396461, now seen corresponding path program 1 times [2022-11-25 22:31:06,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:31:06,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657255159] [2022-11-25 22:31:06,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:31:06,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:31:06,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:31:07,216 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 22:31:07,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:31:07,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657255159] [2022-11-25 22:31:07,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657255159] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:31:07,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:31:07,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 22:31:07,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033259142] [2022-11-25 22:31:07,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:31:07,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 22:31:07,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:31:07,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 22:31:07,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:31:07,220 INFO L87 Difference]: Start difference. First operand 4981 states and 8098 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-25 22:31:07,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:31:07,836 INFO L93 Difference]: Finished difference Result 8870 states and 14479 transitions. [2022-11-25 22:31:07,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 22:31:07,839 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 93 [2022-11-25 22:31:07,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:31:07,896 INFO L225 Difference]: With dead ends: 8870 [2022-11-25 22:31:07,896 INFO L226 Difference]: Without dead ends: 5119 [2022-11-25 22:31:07,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:31:07,982 INFO L413 NwaCegarLoop]: 615 mSDtfsCounter, 6 mSDsluCounter, 3029 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3644 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:31:07,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 3644 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:31:07,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5119 states. [2022-11-25 22:31:08,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5119 to 4996. [2022-11-25 22:31:08,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4996 states, 3688 states have (on average 1.563177874186551) internal successors, (5765), 3734 states have internal predecessors, (5765), 1026 states have call successors, (1026), 217 states have call predecessors, (1026), 281 states have return successors, (1322), 1077 states have call predecessors, (1322), 1018 states have call successors, (1322) [2022-11-25 22:31:08,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4996 states to 4996 states and 8113 transitions. [2022-11-25 22:31:08,454 INFO L78 Accepts]: Start accepts. Automaton has 4996 states and 8113 transitions. Word has length 93 [2022-11-25 22:31:08,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:31:08,455 INFO L495 AbstractCegarLoop]: Abstraction has 4996 states and 8113 transitions. [2022-11-25 22:31:08,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-25 22:31:08,455 INFO L276 IsEmpty]: Start isEmpty. Operand 4996 states and 8113 transitions. [2022-11-25 22:31:08,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-25 22:31:08,462 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:31:08,462 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:31:08,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 22:31:08,463 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:31:08,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:31:08,464 INFO L85 PathProgramCache]: Analyzing trace with hash -741219179, now seen corresponding path program 1 times [2022-11-25 22:31:08,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:31:08,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826200344] [2022-11-25 22:31:08,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:31:08,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:31:08,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:31:09,026 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 22:31:09,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:31:09,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826200344] [2022-11-25 22:31:09,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826200344] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:31:09,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:31:09,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 22:31:09,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151974236] [2022-11-25 22:31:09,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:31:09,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 22:31:09,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:31:09,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 22:31:09,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:31:09,033 INFO L87 Difference]: Start difference. First operand 4996 states and 8113 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-25 22:31:13,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:31:13,491 INFO L93 Difference]: Finished difference Result 13891 states and 23147 transitions. [2022-11-25 22:31:13,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 22:31:13,492 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) Word has length 97 [2022-11-25 22:31:13,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:31:13,560 INFO L225 Difference]: With dead ends: 13891 [2022-11-25 22:31:13,560 INFO L226 Difference]: Without dead ends: 9765 [2022-11-25 22:31:13,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-25 22:31:13,593 INFO L413 NwaCegarLoop]: 933 mSDtfsCounter, 1482 mSDsluCounter, 1448 mSDsCounter, 0 mSdLazyCounter, 3226 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1667 SdHoareTripleChecker+Valid, 2381 SdHoareTripleChecker+Invalid, 3452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 3226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:31:13,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1667 Valid, 2381 Invalid, 3452 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [226 Valid, 3226 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-25 22:31:13,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9765 states. [2022-11-25 22:31:14,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9765 to 8127. [2022-11-25 22:31:14,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8127 states, 5909 states have (on average 1.5239465222541886) internal successors, (9005), 6008 states have internal predecessors, (9005), 1729 states have call successors, (1729), 390 states have call predecessors, (1729), 488 states have return successors, (2300), 1783 states have call predecessors, (2300), 1717 states have call successors, (2300) [2022-11-25 22:31:14,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8127 states to 8127 states and 13034 transitions. [2022-11-25 22:31:14,374 INFO L78 Accepts]: Start accepts. Automaton has 8127 states and 13034 transitions. Word has length 97 [2022-11-25 22:31:14,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:31:14,375 INFO L495 AbstractCegarLoop]: Abstraction has 8127 states and 13034 transitions. [2022-11-25 22:31:14,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-25 22:31:14,375 INFO L276 IsEmpty]: Start isEmpty. Operand 8127 states and 13034 transitions. [2022-11-25 22:31:14,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-25 22:31:14,380 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:31:14,381 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:31:14,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 22:31:14,381 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:31:14,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:31:14,382 INFO L85 PathProgramCache]: Analyzing trace with hash -2116832350, now seen corresponding path program 1 times [2022-11-25 22:31:14,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:31:14,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688494828] [2022-11-25 22:31:14,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:31:14,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:31:14,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:31:14,793 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 22:31:14,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:31:14,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688494828] [2022-11-25 22:31:14,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688494828] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:31:14,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:31:14,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 22:31:14,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276375581] [2022-11-25 22:31:14,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:31:14,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 22:31:14,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:31:14,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 22:31:14,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:31:14,797 INFO L87 Difference]: Start difference. First operand 8127 states and 13034 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 4 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-25 22:31:15,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:31:15,972 INFO L93 Difference]: Finished difference Result 16644 states and 27248 transitions. [2022-11-25 22:31:15,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 22:31:15,973 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 4 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 99 [2022-11-25 22:31:15,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:31:16,037 INFO L225 Difference]: With dead ends: 16644 [2022-11-25 22:31:16,037 INFO L226 Difference]: Without dead ends: 9255 [2022-11-25 22:31:16,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-25 22:31:16,101 INFO L413 NwaCegarLoop]: 648 mSDtfsCounter, 235 mSDsluCounter, 2951 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 3599 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:31:16,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 3599 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:31:16,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9255 states. [2022-11-25 22:31:17,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9255 to 9255. [2022-11-25 22:31:17,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9255 states, 6953 states have (on average 1.5332949805839207) internal successors, (10661), 7082 states have internal predecessors, (10661), 1756 states have call successors, (1756), 417 states have call predecessors, (1756), 545 states have return successors, (2327), 1810 states have call predecessors, (2327), 1744 states have call successors, (2327) [2022-11-25 22:31:17,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9255 states to 9255 states and 14744 transitions. [2022-11-25 22:31:17,093 INFO L78 Accepts]: Start accepts. Automaton has 9255 states and 14744 transitions. Word has length 99 [2022-11-25 22:31:17,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:31:17,093 INFO L495 AbstractCegarLoop]: Abstraction has 9255 states and 14744 transitions. [2022-11-25 22:31:17,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 4 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-25 22:31:17,094 INFO L276 IsEmpty]: Start isEmpty. Operand 9255 states and 14744 transitions. [2022-11-25 22:31:17,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-25 22:31:17,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:31:17,098 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:31:17,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 22:31:17,098 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:31:17,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:31:17,099 INFO L85 PathProgramCache]: Analyzing trace with hash 593149738, now seen corresponding path program 1 times [2022-11-25 22:31:17,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:31:17,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258098276] [2022-11-25 22:31:17,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:31:17,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:31:17,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:31:17,449 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 22:31:17,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:31:17,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258098276] [2022-11-25 22:31:17,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258098276] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:31:17,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:31:17,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 22:31:17,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669462711] [2022-11-25 22:31:17,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:31:17,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 22:31:17,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:31:17,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 22:31:17,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:31:17,453 INFO L87 Difference]: Start difference. First operand 9255 states and 14744 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 4 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-25 22:31:20,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:31:20,987 INFO L93 Difference]: Finished difference Result 19570 states and 31758 transitions. [2022-11-25 22:31:20,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 22:31:20,988 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 4 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 101 [2022-11-25 22:31:20,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:31:21,071 INFO L225 Difference]: With dead ends: 19570 [2022-11-25 22:31:21,071 INFO L226 Difference]: Without dead ends: 11515 [2022-11-25 22:31:21,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-25 22:31:21,114 INFO L413 NwaCegarLoop]: 379 mSDtfsCounter, 1104 mSDsluCounter, 1175 mSDsCounter, 0 mSdLazyCounter, 3297 mSolverCounterSat, 427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1198 SdHoareTripleChecker+Valid, 1554 SdHoareTripleChecker+Invalid, 3724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 3297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:31:21,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1198 Valid, 1554 Invalid, 3724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 3297 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-25 22:31:21,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11515 states. [2022-11-25 22:31:21,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11515 to 9390. [2022-11-25 22:31:21,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9390 states, 7043 states have (on average 1.5294618770410338) internal successors, (10772), 7193 states have internal predecessors, (10772), 1759 states have call successors, (1759), 441 states have call predecessors, (1759), 587 states have return successors, (2384), 1810 states have call predecessors, (2384), 1747 states have call successors, (2384) [2022-11-25 22:31:21,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9390 states to 9390 states and 14915 transitions. [2022-11-25 22:31:21,876 INFO L78 Accepts]: Start accepts. Automaton has 9390 states and 14915 transitions. Word has length 101 [2022-11-25 22:31:21,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:31:21,877 INFO L495 AbstractCegarLoop]: Abstraction has 9390 states and 14915 transitions. [2022-11-25 22:31:21,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 4 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-25 22:31:21,878 INFO L276 IsEmpty]: Start isEmpty. Operand 9390 states and 14915 transitions. [2022-11-25 22:31:21,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-25 22:31:21,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:31:21,882 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:31:21,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 22:31:21,882 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:31:21,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:31:21,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1263265834, now seen corresponding path program 1 times [2022-11-25 22:31:21,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:31:21,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383582034] [2022-11-25 22:31:21,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:31:21,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:31:21,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:31:22,048 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 22:31:22,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:31:22,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383582034] [2022-11-25 22:31:22,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383582034] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:31:22,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619381922] [2022-11-25 22:31:22,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:31:22,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:31:22,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:31:22,051 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:31:22,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 22:31:22,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:31:22,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 1602 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 22:31:22,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:31:22,479 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:31:22,480 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:31:22,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619381922] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:31:22,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:31:22,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2022-11-25 22:31:22,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714058419] [2022-11-25 22:31:22,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:31:22,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:31:22,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:31:22,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:31:22,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:31:22,483 INFO L87 Difference]: Start difference. First operand 9390 states and 14915 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-25 22:31:23,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:31:23,567 INFO L93 Difference]: Finished difference Result 18891 states and 30527 transitions. [2022-11-25 22:31:23,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:31:23,568 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 106 [2022-11-25 22:31:23,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:31:23,635 INFO L225 Difference]: With dead ends: 18891 [2022-11-25 22:31:23,635 INFO L226 Difference]: Without dead ends: 9516 [2022-11-25 22:31:23,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:31:23,712 INFO L413 NwaCegarLoop]: 602 mSDtfsCounter, 85 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1719 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:31:23,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 1719 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:31:23,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9516 states. [2022-11-25 22:31:24,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9516 to 9516. [2022-11-25 22:31:24,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9516 states, 7148 states have (on average 1.5246222719641858) internal successors, (10898), 7298 states have internal predecessors, (10898), 1759 states have call successors, (1759), 462 states have call predecessors, (1759), 608 states have return successors, (2384), 1810 states have call predecessors, (2384), 1747 states have call successors, (2384) [2022-11-25 22:31:24,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9516 states to 9516 states and 15041 transitions. [2022-11-25 22:31:24,874 INFO L78 Accepts]: Start accepts. Automaton has 9516 states and 15041 transitions. Word has length 106 [2022-11-25 22:31:24,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:31:24,875 INFO L495 AbstractCegarLoop]: Abstraction has 9516 states and 15041 transitions. [2022-11-25 22:31:24,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-25 22:31:24,876 INFO L276 IsEmpty]: Start isEmpty. Operand 9516 states and 15041 transitions. [2022-11-25 22:31:24,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-25 22:31:24,889 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:31:24,889 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:31:24,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 22:31:25,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:31:25,098 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:31:25,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:31:25,099 INFO L85 PathProgramCache]: Analyzing trace with hash -267475871, now seen corresponding path program 1 times [2022-11-25 22:31:25,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:31:25,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436117275] [2022-11-25 22:31:25,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:31:25,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:31:25,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:31:25,301 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 22:31:25,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:31:25,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436117275] [2022-11-25 22:31:25,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436117275] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:31:25,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435678520] [2022-11-25 22:31:25,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:31:25,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:31:25,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:31:25,303 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:31:25,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 22:31:25,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:31:25,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 1607 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 22:31:25,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:31:25,736 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 22:31:25,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:31:25,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435678520] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:31:25,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:31:25,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-11-25 22:31:25,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045553210] [2022-11-25 22:31:25,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:31:25,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:31:25,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:31:25,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:31:25,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:31:25,739 INFO L87 Difference]: Start difference. First operand 9516 states and 15041 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-25 22:31:26,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:31:26,645 INFO L93 Difference]: Finished difference Result 19080 states and 30586 transitions. [2022-11-25 22:31:26,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:31:26,645 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 108 [2022-11-25 22:31:26,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:31:26,695 INFO L225 Difference]: With dead ends: 19080 [2022-11-25 22:31:26,695 INFO L226 Difference]: Without dead ends: 9495 [2022-11-25 22:31:26,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-25 22:31:26,745 INFO L413 NwaCegarLoop]: 601 mSDtfsCounter, 91 mSDsluCounter, 1114 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1715 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:31:26,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 1715 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:31:26,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9495 states. [2022-11-25 22:31:27,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9495 to 9495. [2022-11-25 22:31:27,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9495 states, 7127 states have (on average 1.5173284692016276) internal successors, (10814), 7277 states have internal predecessors, (10814), 1759 states have call successors, (1759), 462 states have call predecessors, (1759), 608 states have return successors, (2384), 1810 states have call predecessors, (2384), 1747 states have call successors, (2384) [2022-11-25 22:31:27,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9495 states to 9495 states and 14957 transitions. [2022-11-25 22:31:27,380 INFO L78 Accepts]: Start accepts. Automaton has 9495 states and 14957 transitions. Word has length 108 [2022-11-25 22:31:27,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:31:27,381 INFO L495 AbstractCegarLoop]: Abstraction has 9495 states and 14957 transitions. [2022-11-25 22:31:27,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-25 22:31:27,381 INFO L276 IsEmpty]: Start isEmpty. Operand 9495 states and 14957 transitions. [2022-11-25 22:31:27,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-25 22:31:27,386 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:31:27,387 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:31:27,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 22:31:27,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:31:27,596 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:31:27,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:31:27,597 INFO L85 PathProgramCache]: Analyzing trace with hash 462639426, now seen corresponding path program 1 times [2022-11-25 22:31:27,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:31:27,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834234307] [2022-11-25 22:31:27,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:31:27,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:31:27,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:31:27,834 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 22:31:27,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:31:27,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834234307] [2022-11-25 22:31:27,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834234307] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:31:27,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937433534] [2022-11-25 22:31:27,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:31:27,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:31:27,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:31:27,837 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:31:27,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 22:31:28,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:31:28,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 1610 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 22:31:28,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:31:28,333 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:31:28,333 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:31:28,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937433534] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:31:28,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:31:28,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-11-25 22:31:28,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045658914] [2022-11-25 22:31:28,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:31:28,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:31:28,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:31:28,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:31:28,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-25 22:31:28,339 INFO L87 Difference]: Start difference. First operand 9495 states and 14957 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-25 22:31:30,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:31:30,593 INFO L93 Difference]: Finished difference Result 25275 states and 42039 transitions. [2022-11-25 22:31:30,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 22:31:30,594 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 108 [2022-11-25 22:31:30,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:31:30,690 INFO L225 Difference]: With dead ends: 25275 [2022-11-25 22:31:30,690 INFO L226 Difference]: Without dead ends: 15795 [2022-11-25 22:31:30,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-25 22:31:30,765 INFO L413 NwaCegarLoop]: 772 mSDtfsCounter, 614 mSDsluCounter, 1568 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 2340 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 22:31:30,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [617 Valid, 2340 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 22:31:30,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15795 states. [2022-11-25 22:31:31,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15795 to 15503. [2022-11-25 22:31:31,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15503 states, 11599 states have (on average 1.4746960944909044) internal successors, (17105), 11822 states have internal predecessors, (17105), 2944 states have call successors, (2944), 742 states have call predecessors, (2944), 959 states have return successors, (4880), 3037 states have call predecessors, (4880), 2924 states have call successors, (4880) [2022-11-25 22:31:32,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15503 states to 15503 states and 24929 transitions. [2022-11-25 22:31:32,108 INFO L78 Accepts]: Start accepts. Automaton has 15503 states and 24929 transitions. Word has length 108 [2022-11-25 22:31:32,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:31:32,109 INFO L495 AbstractCegarLoop]: Abstraction has 15503 states and 24929 transitions. [2022-11-25 22:31:32,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-25 22:31:32,109 INFO L276 IsEmpty]: Start isEmpty. Operand 15503 states and 24929 transitions. [2022-11-25 22:31:32,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-25 22:31:32,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:31:32,117 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:31:32,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 22:31:32,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:31:32,326 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:31:32,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:31:32,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1378891578, now seen corresponding path program 1 times [2022-11-25 22:31:32,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:31:32,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130831352] [2022-11-25 22:31:32,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:31:32,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:31:32,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:31:32,707 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 22:31:32,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:31:32,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130831352] [2022-11-25 22:31:32,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130831352] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:31:32,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560427852] [2022-11-25 22:31:32,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:31:32,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:31:32,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:31:32,711 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:31:32,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 22:31:33,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:31:33,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 1612 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 22:31:33,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:31:33,257 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 22:31:33,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:31:33,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560427852] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:31:33,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:31:33,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2022-11-25 22:31:33,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145697077] [2022-11-25 22:31:33,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:31:33,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 22:31:33,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:31:33,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 22:31:33,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-25 22:31:33,261 INFO L87 Difference]: Start difference. First operand 15503 states and 24929 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 3 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-25 22:31:35,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:31:35,652 INFO L93 Difference]: Finished difference Result 35030 states and 58957 transitions. [2022-11-25 22:31:35,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 22:31:35,653 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 3 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) Word has length 110 [2022-11-25 22:31:35,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:31:35,789 INFO L225 Difference]: With dead ends: 35030 [2022-11-25 22:31:35,789 INFO L226 Difference]: Without dead ends: 19542 [2022-11-25 22:31:35,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-25 22:31:35,885 INFO L413 NwaCegarLoop]: 892 mSDtfsCounter, 695 mSDsluCounter, 2446 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 3338 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 22:31:35,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [696 Valid, 3338 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 22:31:35,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19542 states. [2022-11-25 22:31:37,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19542 to 19443. [2022-11-25 22:31:37,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19443 states, 14584 states have (on average 1.4605732309380142) internal successors, (21301), 14856 states have internal predecessors, (21301), 3596 states have call successors, (3596), 1000 states have call predecessors, (3596), 1262 states have return successors, (8804), 3685 states have call predecessors, (8804), 3562 states have call successors, (8804) [2022-11-25 22:31:37,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19443 states to 19443 states and 33701 transitions. [2022-11-25 22:31:37,639 INFO L78 Accepts]: Start accepts. Automaton has 19443 states and 33701 transitions. Word has length 110 [2022-11-25 22:31:37,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:31:37,640 INFO L495 AbstractCegarLoop]: Abstraction has 19443 states and 33701 transitions. [2022-11-25 22:31:37,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 3 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-25 22:31:37,640 INFO L276 IsEmpty]: Start isEmpty. Operand 19443 states and 33701 transitions. [2022-11-25 22:31:37,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-25 22:31:37,645 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:31:37,645 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:31:37,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 22:31:37,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:31:37,854 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:31:37,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:31:37,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1773022225, now seen corresponding path program 1 times [2022-11-25 22:31:37,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:31:37,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163251292] [2022-11-25 22:31:37,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:31:37,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:31:37,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:31:38,067 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 22:31:38,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:31:38,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163251292] [2022-11-25 22:31:38,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163251292] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:31:38,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588603705] [2022-11-25 22:31:38,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:31:38,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:31:38,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:31:38,070 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:31:38,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 22:31:38,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:31:38,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 1613 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 22:31:38,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:31:38,460 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 22:31:38,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:31:38,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588603705] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:31:38,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:31:38,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-11-25 22:31:38,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425194812] [2022-11-25 22:31:38,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:31:38,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:31:38,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:31:38,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:31:38,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-25 22:31:38,477 INFO L87 Difference]: Start difference. First operand 19443 states and 33701 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-25 22:31:40,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:31:40,267 INFO L93 Difference]: Finished difference Result 39423 states and 72968 transitions. [2022-11-25 22:31:40,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:31:40,268 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 109 [2022-11-25 22:31:40,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:31:40,449 INFO L225 Difference]: With dead ends: 39423 [2022-11-25 22:31:40,450 INFO L226 Difference]: Without dead ends: 20003 [2022-11-25 22:31:40,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-25 22:31:40,711 INFO L413 NwaCegarLoop]: 616 mSDtfsCounter, 2 mSDsluCounter, 1829 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2445 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:31:40,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2445 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:31:40,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20003 states. [2022-11-25 22:31:42,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20003 to 19687. [2022-11-25 22:31:42,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19687 states, 14789 states have (on average 1.4541889242004191) internal successors, (21506), 15017 states have internal predecessors, (21506), 3596 states have call successors, (3596), 1000 states have call predecessors, (3596), 1301 states have return successors, (8887), 3768 states have call predecessors, (8887), 3562 states have call successors, (8887) [2022-11-25 22:31:42,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19687 states to 19687 states and 33989 transitions. [2022-11-25 22:31:42,806 INFO L78 Accepts]: Start accepts. Automaton has 19687 states and 33989 transitions. Word has length 109 [2022-11-25 22:31:42,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:31:42,807 INFO L495 AbstractCegarLoop]: Abstraction has 19687 states and 33989 transitions. [2022-11-25 22:31:42,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-25 22:31:42,808 INFO L276 IsEmpty]: Start isEmpty. Operand 19687 states and 33989 transitions. [2022-11-25 22:31:42,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-25 22:31:42,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:31:42,814 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:31:42,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 22:31:43,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 22:31:43,029 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:31:43,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:31:43,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1572717302, now seen corresponding path program 1 times [2022-11-25 22:31:43,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:31:43,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052953878] [2022-11-25 22:31:43,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:31:43,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:31:43,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:31:43,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 22:31:43,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:31:43,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052953878] [2022-11-25 22:31:43,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052953878] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:31:43,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495653112] [2022-11-25 22:31:43,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:31:43,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:31:43,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:31:43,285 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:31:43,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 22:31:43,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:31:43,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 1618 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 22:31:43,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:31:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 22:31:43,727 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:31:43,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495653112] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:31:43,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:31:43,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-11-25 22:31:43,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561056146] [2022-11-25 22:31:43,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:31:43,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:31:43,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:31:43,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:31:43,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:31:43,730 INFO L87 Difference]: Start difference. First operand 19687 states and 33989 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-25 22:31:45,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:31:45,563 INFO L93 Difference]: Finished difference Result 40079 states and 72013 transitions. [2022-11-25 22:31:45,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:31:45,563 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 112 [2022-11-25 22:31:45,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:31:45,833 INFO L225 Difference]: With dead ends: 40079 [2022-11-25 22:31:45,833 INFO L226 Difference]: Without dead ends: 20416 [2022-11-25 22:31:46,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:31:46,116 INFO L413 NwaCegarLoop]: 599 mSDtfsCounter, 19 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 1675 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:31:46,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 1675 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:31:46,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20416 states. [2022-11-25 22:31:47,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20416 to 20254. [2022-11-25 22:31:47,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20254 states, 15356 states have (on average 1.4608622036988799) internal successors, (22433), 15584 states have internal predecessors, (22433), 3596 states have call successors, (3596), 1000 states have call predecessors, (3596), 1301 states have return successors, (8887), 3768 states have call predecessors, (8887), 3562 states have call successors, (8887) [2022-11-25 22:31:48,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20254 states to 20254 states and 34916 transitions. [2022-11-25 22:31:48,017 INFO L78 Accepts]: Start accepts. Automaton has 20254 states and 34916 transitions. Word has length 112 [2022-11-25 22:31:48,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:31:48,018 INFO L495 AbstractCegarLoop]: Abstraction has 20254 states and 34916 transitions. [2022-11-25 22:31:48,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-25 22:31:48,018 INFO L276 IsEmpty]: Start isEmpty. Operand 20254 states and 34916 transitions. [2022-11-25 22:31:48,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-25 22:31:48,024 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:31:48,024 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:31:48,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 22:31:48,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 22:31:48,233 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:31:48,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:31:48,233 INFO L85 PathProgramCache]: Analyzing trace with hash 446905056, now seen corresponding path program 1 times [2022-11-25 22:31:48,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:31:48,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694568180] [2022-11-25 22:31:48,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:31:48,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:31:48,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:31:48,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 22:31:48,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:31:48,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694568180] [2022-11-25 22:31:48,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694568180] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:31:48,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586836882] [2022-11-25 22:31:48,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:31:48,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:31:48,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:31:48,464 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:31:48,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 22:31:48,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:31:48,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 1620 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 22:31:48,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:31:48,915 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:31:48,916 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:31:48,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586836882] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:31:48,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:31:48,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-11-25 22:31:48,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065638469] [2022-11-25 22:31:48,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:31:48,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:31:48,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:31:48,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:31:48,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-25 22:31:48,921 INFO L87 Difference]: Start difference. First operand 20254 states and 34916 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-25 22:31:52,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:31:52,841 INFO L93 Difference]: Finished difference Result 51874 states and 98138 transitions. [2022-11-25 22:31:52,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 22:31:52,842 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 114 [2022-11-25 22:31:52,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:31:53,040 INFO L225 Difference]: With dead ends: 51874 [2022-11-25 22:31:53,041 INFO L226 Difference]: Without dead ends: 32961 [2022-11-25 22:31:53,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-25 22:31:53,282 INFO L413 NwaCegarLoop]: 799 mSDtfsCounter, 637 mSDsluCounter, 1345 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 2144 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 22:31:53,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [639 Valid, 2144 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 22:31:53,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32961 states. [2022-11-25 22:31:56,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32961 to 32132. [2022-11-25 22:31:56,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32132 states, 24336 states have (on average 1.457922419460881) internal successors, (35480), 24677 states have internal predecessors, (35480), 5770 states have call successors, (5770), 1582 states have call predecessors, (5770), 2025 states have return successors, (18487), 6037 states have call predecessors, (18487), 5713 states have call successors, (18487) [2022-11-25 22:31:56,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32132 states to 32132 states and 59737 transitions. [2022-11-25 22:31:56,742 INFO L78 Accepts]: Start accepts. Automaton has 32132 states and 59737 transitions. Word has length 114 [2022-11-25 22:31:56,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:31:56,743 INFO L495 AbstractCegarLoop]: Abstraction has 32132 states and 59737 transitions. [2022-11-25 22:31:56,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-25 22:31:56,744 INFO L276 IsEmpty]: Start isEmpty. Operand 32132 states and 59737 transitions. [2022-11-25 22:31:56,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-25 22:31:56,750 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:31:56,750 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:31:56,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 22:31:56,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:31:56,963 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:31:56,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:31:56,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1818400054, now seen corresponding path program 1 times [2022-11-25 22:31:56,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:31:56,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584826304] [2022-11-25 22:31:56,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:31:56,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:31:57,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:31:57,127 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 22:31:57,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:31:57,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584826304] [2022-11-25 22:31:57,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584826304] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:31:57,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191172481] [2022-11-25 22:31:57,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:31:57,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:31:57,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:31:57,130 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:31:57,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f53be4f6-77f5-4b87-bb80-28d2bd241d5e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 22:31:57,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:31:57,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 1619 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 22:31:57,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:31:57,515 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 22:31:57,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:31:57,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191172481] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:31:57,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:31:57,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2022-11-25 22:31:57,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240271934] [2022-11-25 22:31:57,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:31:57,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:31:57,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:31:57,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:31:57,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:31:57,519 INFO L87 Difference]: Start difference. First operand 32132 states and 59737 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, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-25 22:32:00,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:32:00,759 INFO L93 Difference]: Finished difference Result 64936 states and 128734 transitions. [2022-11-25 22:32:00,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:32:00,760 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, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 114 [2022-11-25 22:32:00,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:32:01,200 INFO L225 Difference]: With dead ends: 64936 [2022-11-25 22:32:01,201 INFO L226 Difference]: Without dead ends: 32828 [2022-11-25 22:32:01,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:32:01,548 INFO L413 NwaCegarLoop]: 613 mSDtfsCounter, 5 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1209 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:32:01,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 1209 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:32:01,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32828 states.