./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d84130cab59568fb669543ac086f4847eedfc87145b3c30d32e19c1d0d03b42f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 01:22:26,429 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:22:26,432 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:22:26,474 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:22:26,475 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:22:26,479 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:22:26,481 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:22:26,484 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:22:26,486 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:22:26,491 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:22:26,492 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:22:26,493 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:22:26,494 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:22:26,495 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:22:26,495 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:22:26,497 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:22:26,497 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:22:26,498 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:22:26,500 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:22:26,502 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:22:26,503 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:22:26,504 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:22:26,506 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:22:26,507 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:22:26,510 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:22:26,511 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:22:26,511 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:22:26,512 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:22:26,512 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:22:26,513 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:22:26,514 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:22:26,515 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:22:26,516 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:22:26,517 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:22:26,518 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:22:26,518 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:22:26,519 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:22:26,519 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:22:26,519 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:22:26,520 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:22:26,521 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:22:26,522 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 01:22:26,542 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:22:26,542 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:22:26,543 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:22:26,543 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:22:26,544 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:22:26,544 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:22:26,544 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:22:26,545 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:22:26,545 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:22:26,545 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:22:26,545 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:22:26,546 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:22:26,546 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:22:26,546 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:22:26,547 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:22:26,547 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:22:26,547 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:22:26,547 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:22:26,548 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:22:26,548 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:22:26,549 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:22:26,549 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:22:26,549 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:22:26,550 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 01:22:26,550 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:22:26,550 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 01:22:26,550 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:22:26,551 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 01:22:26,551 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:22:26,551 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 01:22:26,551 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:22:26,552 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:22:26,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:22:26,552 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:22:26,553 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:22:26,553 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:22:26,553 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 01:22:26,553 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:22:26,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:22:26,554 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 01:22:26,554 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:22:26,554 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_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d84130cab59568fb669543ac086f4847eedfc87145b3c30d32e19c1d0d03b42f [2022-11-22 01:22:26,802 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:22:26,837 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:22:26,839 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:22:26,840 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:22:26,841 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:22:26,842 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c [2022-11-22 01:22:29,882 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:22:30,229 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:22:30,234 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c [2022-11-22 01:22:30,257 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/data/97a409cfc/95648663c53348d78e3910d700e7f630/FLAGab835db16 [2022-11-22 01:22:30,275 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/data/97a409cfc/95648663c53348d78e3910d700e7f630 [2022-11-22 01:22:30,280 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:22:30,282 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:22:30,285 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:22:30,285 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:22:30,289 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:22:30,290 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:22:30" (1/1) ... [2022-11-22 01:22:30,291 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6250942 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:22:30, skipping insertion in model container [2022-11-22 01:22:30,292 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:22:30" (1/1) ... [2022-11-22 01:22:30,299 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:22:30,375 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:22:30,949 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_f801622f-9af5-41d0-a3b3-da5de7218711/sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c[61393,61406] [2022-11-22 01:22:31,014 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:22:31,029 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:22:31,199 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_f801622f-9af5-41d0-a3b3-da5de7218711/sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c[61393,61406] [2022-11-22 01:22:31,226 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:22:31,255 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:22:31,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:22:31 WrapperNode [2022-11-22 01:22:31,256 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:22:31,258 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:22:31,258 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:22:31,258 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:22:31,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:22:31" (1/1) ... [2022-11-22 01:22:31,299 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:22:31" (1/1) ... [2022-11-22 01:22:31,353 INFO L138 Inliner]: procedures = 93, calls = 346, calls flagged for inlining = 30, calls inlined = 26, statements flattened = 883 [2022-11-22 01:22:31,353 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:22:31,354 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:22:31,354 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:22:31,354 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:22:31,363 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:22:31" (1/1) ... [2022-11-22 01:22:31,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:22:31" (1/1) ... [2022-11-22 01:22:31,370 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:22:31" (1/1) ... [2022-11-22 01:22:31,370 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:22:31" (1/1) ... [2022-11-22 01:22:31,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:22:31" (1/1) ... [2022-11-22 01:22:31,404 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:22:31" (1/1) ... [2022-11-22 01:22:31,410 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:22:31" (1/1) ... [2022-11-22 01:22:31,414 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:22:31" (1/1) ... [2022-11-22 01:22:31,423 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:22:31,424 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:22:31,424 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:22:31,424 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:22:31,425 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:22:31" (1/1) ... [2022-11-22 01:22:31,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:22:31,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:22:31,487 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:22:31,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:22:31,540 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2022-11-22 01:22:31,540 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2022-11-22 01:22:31,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:22:31,540 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-22 01:22:31,540 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-22 01:22:31,540 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-22 01:22:31,541 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-22 01:22:31,541 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2022-11-22 01:22:31,541 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2022-11-22 01:22:31,541 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-22 01:22:31,541 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-22 01:22:31,541 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-22 01:22:31,541 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-22 01:22:31,541 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-22 01:22:31,542 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-22 01:22:31,542 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-22 01:22:31,542 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-22 01:22:31,542 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-11-22 01:22:31,542 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-11-22 01:22:31,542 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-22 01:22:31,542 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-22 01:22:31,542 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-22 01:22:31,543 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-22 01:22:31,543 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-22 01:22:31,543 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-22 01:22:31,543 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-22 01:22:31,543 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-22 01:22:31,543 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-22 01:22:31,543 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-22 01:22:31,543 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-22 01:22:31,544 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-22 01:22:31,544 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-22 01:22:31,544 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-22 01:22:31,544 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-22 01:22:31,544 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-22 01:22:31,544 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-22 01:22:31,544 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-22 01:22:31,545 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-22 01:22:31,545 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-22 01:22:31,545 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-22 01:22:31,545 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-22 01:22:31,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:22:31,545 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-22 01:22:31,545 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-22 01:22:31,545 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-22 01:22:31,546 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-22 01:22:31,546 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-22 01:22:31,546 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-22 01:22:31,546 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-22 01:22:31,546 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-22 01:22:31,546 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2022-11-22 01:22:31,546 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2022-11-22 01:22:31,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:22:31,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:22:31,547 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-22 01:22:31,547 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-22 01:22:31,754 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:22:31,757 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:22:33,046 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:22:33,850 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:22:33,850 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-22 01:22:33,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:22:33 BoogieIcfgContainer [2022-11-22 01:22:33,855 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:22:33,859 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:22:33,859 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:22:33,863 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:22:33,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:22:30" (1/3) ... [2022-11-22 01:22:33,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57457034 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:22:33, skipping insertion in model container [2022-11-22 01:22:33,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:22:31" (2/3) ... [2022-11-22 01:22:33,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57457034 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:22:33, skipping insertion in model container [2022-11-22 01:22:33,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:22:33" (3/3) ... [2022-11-22 01:22:33,867 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product30.cil.c [2022-11-22 01:22:33,886 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:22:33,886 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 01:22:33,967 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:22:33,974 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;@1ed23c3b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:22:33,974 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 01:22:33,986 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) [2022-11-22 01:22:34,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-22 01:22:34,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:22:34,016 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] [2022-11-22 01:22:34,016 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:22:34,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:22:34,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1644822208, now seen corresponding path program 1 times [2022-11-22 01:22:34,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:22:34,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49974131] [2022-11-22 01:22:34,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:22:34,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:22:34,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:22:35,049 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 01:22:35,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:22:35,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49974131] [2022-11-22 01:22:35,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49974131] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:22:35,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:22:35,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 01:22:35,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492593319] [2022-11-22 01:22:35,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:22:35,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:22:35,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:22:35,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:22:35,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:22:35,106 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) [2022-11-22 01:22:38,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:22:38,973 INFO L93 Difference]: Finished difference Result 1726 states and 2836 transitions. [2022-11-22 01:22:38,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:22:38,976 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 [2022-11-22 01:22:38,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:22:39,015 INFO L225 Difference]: With dead ends: 1726 [2022-11-22 01:22:39,018 INFO L226 Difference]: Without dead ends: 1311 [2022-11-22 01:22:39,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:22:39,038 INFO L413 NwaCegarLoop]: 934 mSDtfsCounter, 1535 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 2348 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1680 SdHoareTripleChecker+Valid, 1625 SdHoareTripleChecker+Invalid, 2520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 2348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:22:39,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1680 Valid, 1625 Invalid, 2520 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [172 Valid, 2348 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-22 01:22:39,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2022-11-22 01:22:39,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1198. [2022-11-22 01:22:39,275 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) [2022-11-22 01:22:39,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 1940 transitions. [2022-11-22 01:22:39,295 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 1940 transitions. Word has length 70 [2022-11-22 01:22:39,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:22:39,301 INFO L495 AbstractCegarLoop]: Abstraction has 1198 states and 1940 transitions. [2022-11-22 01:22:39,302 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) [2022-11-22 01:22:39,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 1940 transitions. [2022-11-22 01:22:39,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-22 01:22:39,314 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:22:39,315 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:22:39,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 01:22:39,316 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:22:39,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:22:39,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1635940471, now seen corresponding path program 1 times [2022-11-22 01:22:39,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:22:39,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456185233] [2022-11-22 01:22:39,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:22:39,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:22:39,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:22:40,127 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-22 01:22:40,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:22:40,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456185233] [2022-11-22 01:22:40,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456185233] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:22:40,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375719480] [2022-11-22 01:22:40,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:22:40,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:22:40,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:22:40,134 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:22:40,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:22:40,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:22:40,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 2116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 01:22:40,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:22:40,893 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:22:40,893 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:22:40,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375719480] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:22:40,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:22:40,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 9 [2022-11-22 01:22:40,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905546805] [2022-11-22 01:22:40,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:22:40,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 01:22:40,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:22:40,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 01:22:40,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-22 01:22:40,897 INFO L87 Difference]: Start difference. First operand 1198 states and 1940 transitions. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 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) [2022-11-22 01:22:45,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:22:45,350 INFO L93 Difference]: Finished difference Result 4347 states and 7097 transitions. [2022-11-22 01:22:45,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-22 01:22:45,351 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 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 129 [2022-11-22 01:22:45,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:22:45,383 INFO L225 Difference]: With dead ends: 4347 [2022-11-22 01:22:45,384 INFO L226 Difference]: Without dead ends: 3165 [2022-11-22 01:22:45,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-11-22 01:22:45,398 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 1842 mSDsluCounter, 2134 mSDsCounter, 0 mSdLazyCounter, 5016 mSolverCounterSat, 618 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1926 SdHoareTripleChecker+Valid, 2541 SdHoareTripleChecker+Invalid, 5634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 618 IncrementalHoareTripleChecker+Valid, 5016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-22 01:22:45,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1926 Valid, 2541 Invalid, 5634 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [618 Valid, 5016 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-22 01:22:45,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3165 states. [2022-11-22 01:22:45,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3165 to 2849. [2022-11-22 01:22:45,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2849 states, 2090 states have (on average 1.6004784688995215) internal successors, (3345), 2152 states have internal predecessors, (3345), 602 states have call successors, (602), 137 states have call predecessors, (602), 156 states have return successors, (699), 585 states have call predecessors, (699), 596 states have call successors, (699) [2022-11-22 01:22:45,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2849 states to 2849 states and 4646 transitions. [2022-11-22 01:22:45,621 INFO L78 Accepts]: Start accepts. Automaton has 2849 states and 4646 transitions. Word has length 129 [2022-11-22 01:22:45,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:22:45,624 INFO L495 AbstractCegarLoop]: Abstraction has 2849 states and 4646 transitions. [2022-11-22 01:22:45,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 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) [2022-11-22 01:22:45,624 INFO L276 IsEmpty]: Start isEmpty. Operand 2849 states and 4646 transitions. [2022-11-22 01:22:45,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-22 01:22:45,631 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:22:45,631 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] [2022-11-22 01:22:45,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 01:22:45,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:22:45,841 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:22:45,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:22:45,842 INFO L85 PathProgramCache]: Analyzing trace with hash -413151591, now seen corresponding path program 1 times [2022-11-22 01:22:45,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:22:45,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155318845] [2022-11-22 01:22:45,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:22:45,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:22:45,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:22:46,221 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:22:46,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:22:46,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155318845] [2022-11-22 01:22:46,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155318845] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:22:46,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:22:46,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:22:46,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42834729] [2022-11-22 01:22:46,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:22:46,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:22:46,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:22:46,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:22:46,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:22:46,230 INFO L87 Difference]: Start difference. First operand 2849 states and 4646 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 3 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-22 01:22:46,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:22:46,738 INFO L93 Difference]: Finished difference Result 6336 states and 10351 transitions. [2022-11-22 01:22:46,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:22:46,740 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 3 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 91 [2022-11-22 01:22:46,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:22:46,766 INFO L225 Difference]: With dead ends: 6336 [2022-11-22 01:22:46,766 INFO L226 Difference]: Without dead ends: 3502 [2022-11-22 01:22:46,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:22:46,790 INFO L413 NwaCegarLoop]: 784 mSDtfsCounter, 494 mSDsluCounter, 1156 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 1940 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:22:46,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [500 Valid, 1940 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:22:46,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3502 states. [2022-11-22 01:22:47,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3502 to 3389. [2022-11-22 01:22:47,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3389 states, 2491 states have (on average 1.583701324769169) internal successors, (3945), 2548 states have internal predecessors, (3945), 708 states have call successors, (708), 166 states have call predecessors, (708), 189 states have return successors, (838), 698 states have call predecessors, (838), 700 states have call successors, (838) [2022-11-22 01:22:47,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3389 states to 3389 states and 5491 transitions. [2022-11-22 01:22:47,057 INFO L78 Accepts]: Start accepts. Automaton has 3389 states and 5491 transitions. Word has length 91 [2022-11-22 01:22:47,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:22:47,058 INFO L495 AbstractCegarLoop]: Abstraction has 3389 states and 5491 transitions. [2022-11-22 01:22:47,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 3 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-22 01:22:47,059 INFO L276 IsEmpty]: Start isEmpty. Operand 3389 states and 5491 transitions. [2022-11-22 01:22:47,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-22 01:22:47,068 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:22:47,068 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] [2022-11-22 01:22:47,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 01:22:47,069 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:22:47,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:22:47,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1612639557, now seen corresponding path program 1 times [2022-11-22 01:22:47,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:22:47,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886331750] [2022-11-22 01:22:47,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:22:47,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:22:47,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:22:47,452 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:22:47,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:22:47,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886331750] [2022-11-22 01:22:47,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886331750] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:22:47,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:22:47,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 01:22:47,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034855269] [2022-11-22 01:22:47,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:22:47,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:22:47,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:22:47,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:22:47,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:22:47,465 INFO L87 Difference]: Start difference. First operand 3389 states and 5491 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) [2022-11-22 01:22:47,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:22:47,959 INFO L93 Difference]: Finished difference Result 5701 states and 9283 transitions. [2022-11-22 01:22:47,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:22:47,960 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 [2022-11-22 01:22:47,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:22:47,996 INFO L225 Difference]: With dead ends: 5701 [2022-11-22 01:22:47,996 INFO L226 Difference]: Without dead ends: 3494 [2022-11-22 01:22:48,018 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 [2022-11-22 01:22:48,023 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 [2022-11-22 01:22:48,025 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] [2022-11-22 01:22:48,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3494 states. [2022-11-22 01:22:48,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3494 to 3452. [2022-11-22 01:22:48,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3452 states, 2536 states have (on average 1.5733438485804416) internal successors, (3990), 2593 states have internal predecessors, (3990), 708 states have call successors, (708), 166 states have call predecessors, (708), 207 states have return successors, (883), 716 states have call predecessors, (883), 700 states have call successors, (883) [2022-11-22 01:22:48,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3452 states to 3452 states and 5581 transitions. [2022-11-22 01:22:48,315 INFO L78 Accepts]: Start accepts. Automaton has 3452 states and 5581 transitions. Word has length 93 [2022-11-22 01:22:48,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:22:48,316 INFO L495 AbstractCegarLoop]: Abstraction has 3452 states and 5581 transitions. [2022-11-22 01:22:48,317 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) [2022-11-22 01:22:48,317 INFO L276 IsEmpty]: Start isEmpty. Operand 3452 states and 5581 transitions. [2022-11-22 01:22:48,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-22 01:22:48,322 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:22:48,323 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] [2022-11-22 01:22:48,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 01:22:48,323 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:22:48,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:22:48,324 INFO L85 PathProgramCache]: Analyzing trace with hash -2116550772, now seen corresponding path program 1 times [2022-11-22 01:22:48,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:22:48,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399558451] [2022-11-22 01:22:48,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:22:48,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:22:48,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:22:48,691 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:22:48,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:22:48,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399558451] [2022-11-22 01:22:48,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399558451] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:22:48,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:22:48,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 01:22:48,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470375632] [2022-11-22 01:22:48,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:22:48,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:22:48,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:22:48,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:22:48,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:22:48,694 INFO L87 Difference]: Start difference. First operand 3452 states and 5581 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) [2022-11-22 01:22:49,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:22:49,112 INFO L93 Difference]: Finished difference Result 5788 states and 9397 transitions. [2022-11-22 01:22:49,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:22:49,113 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 [2022-11-22 01:22:49,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:22:49,139 INFO L225 Difference]: With dead ends: 5788 [2022-11-22 01:22:49,139 INFO L226 Difference]: Without dead ends: 3539 [2022-11-22 01:22:49,157 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 [2022-11-22 01:22:49,158 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 [2022-11-22 01:22:49,158 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] [2022-11-22 01:22:49,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3539 states. [2022-11-22 01:22:49,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3539 to 3461. [2022-11-22 01:22:49,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3461 states, 2545 states have (on average 1.5713163064833007) internal successors, (3999), 2593 states have internal predecessors, (3999), 708 states have call successors, (708), 166 states have call predecessors, (708), 207 states have return successors, (883), 725 states have call predecessors, (883), 700 states have call successors, (883) [2022-11-22 01:22:49,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3461 states to 3461 states and 5590 transitions. [2022-11-22 01:22:49,445 INFO L78 Accepts]: Start accepts. Automaton has 3461 states and 5590 transitions. Word has length 92 [2022-11-22 01:22:49,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:22:49,446 INFO L495 AbstractCegarLoop]: Abstraction has 3461 states and 5590 transitions. [2022-11-22 01:22:49,446 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) [2022-11-22 01:22:49,446 INFO L276 IsEmpty]: Start isEmpty. Operand 3461 states and 5590 transitions. [2022-11-22 01:22:49,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-22 01:22:49,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:22:49,450 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] [2022-11-22 01:22:49,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 01:22:49,451 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:22:49,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:22:49,451 INFO L85 PathProgramCache]: Analyzing trace with hash 749583205, now seen corresponding path program 1 times [2022-11-22 01:22:49,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:22:49,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052801109] [2022-11-22 01:22:49,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:22:49,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:22:49,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:22:49,758 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:22:49,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:22:49,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052801109] [2022-11-22 01:22:49,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052801109] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:22:49,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:22:49,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 01:22:49,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706482713] [2022-11-22 01:22:49,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:22:49,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:22:49,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:22:49,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:22:49,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:22:49,761 INFO L87 Difference]: Start difference. First operand 3461 states and 5590 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) [2022-11-22 01:22:50,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:22:50,197 INFO L93 Difference]: Finished difference Result 5803 states and 9412 transitions. [2022-11-22 01:22:50,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:22:50,197 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 [2022-11-22 01:22:50,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:22:50,225 INFO L225 Difference]: With dead ends: 5803 [2022-11-22 01:22:50,225 INFO L226 Difference]: Without dead ends: 3548 [2022-11-22 01:22:50,245 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 [2022-11-22 01:22:50,246 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 [2022-11-22 01:22:50,246 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] [2022-11-22 01:22:50,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3548 states. [2022-11-22 01:22:50,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3548 to 3470. [2022-11-22 01:22:50,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3470 states, 2554 states have (on average 1.5693030540328896) internal successors, (4008), 2593 states have internal predecessors, (4008), 708 states have call successors, (708), 166 states have call predecessors, (708), 207 states have return successors, (883), 734 states have call predecessors, (883), 700 states have call successors, (883) [2022-11-22 01:22:50,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3470 states to 3470 states and 5599 transitions. [2022-11-22 01:22:50,573 INFO L78 Accepts]: Start accepts. Automaton has 3470 states and 5599 transitions. Word has length 93 [2022-11-22 01:22:50,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:22:50,574 INFO L495 AbstractCegarLoop]: Abstraction has 3470 states and 5599 transitions. [2022-11-22 01:22:50,575 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) [2022-11-22 01:22:50,575 INFO L276 IsEmpty]: Start isEmpty. Operand 3470 states and 5599 transitions. [2022-11-22 01:22:50,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-22 01:22:50,580 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:22:50,580 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] [2022-11-22 01:22:50,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 01:22:50,581 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:22:50,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:22:50,581 INFO L85 PathProgramCache]: Analyzing trace with hash 850399757, now seen corresponding path program 1 times [2022-11-22 01:22:50,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:22:50,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719505509] [2022-11-22 01:22:50,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:22:50,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:22:50,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:22:51,005 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:22:51,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:22:51,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719505509] [2022-11-22 01:22:51,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719505509] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:22:51,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:22:51,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 01:22:51,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71389250] [2022-11-22 01:22:51,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:22:51,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:22:51,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:22:51,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:22:51,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:22:51,008 INFO L87 Difference]: Start difference. First operand 3470 states and 5599 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) [2022-11-22 01:22:54,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:22:54,255 INFO L93 Difference]: Finished difference Result 8813 states and 14450 transitions. [2022-11-22 01:22:54,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 01:22:54,256 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 [2022-11-22 01:22:54,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:22:54,314 INFO L225 Difference]: With dead ends: 8813 [2022-11-22 01:22:54,314 INFO L226 Difference]: Without dead ends: 6189 [2022-11-22 01:22:54,341 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 [2022-11-22 01:22:54,342 INFO L413 NwaCegarLoop]: 933 mSDtfsCounter, 2543 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 2404 mSolverCounterSat, 740 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2733 SdHoareTripleChecker+Valid, 1963 SdHoareTripleChecker+Invalid, 3144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 740 IncrementalHoareTripleChecker+Valid, 2404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:22:54,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2733 Valid, 1963 Invalid, 3144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [740 Valid, 2404 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-22 01:22:54,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6189 states. [2022-11-22 01:22:54,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6189 to 5363. [2022-11-22 01:22:54,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5363 states, 3898 states have (on average 1.5330938943047716) internal successors, (5976), 3968 states have internal predecessors, (5976), 1123 states have call successors, (1123), 279 states have call predecessors, (1123), 341 states have return successors, (1432), 1151 states have call predecessors, (1432), 1111 states have call successors, (1432) [2022-11-22 01:22:54,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5363 states to 5363 states and 8531 transitions. [2022-11-22 01:22:54,851 INFO L78 Accepts]: Start accepts. Automaton has 5363 states and 8531 transitions. Word has length 97 [2022-11-22 01:22:54,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:22:54,852 INFO L495 AbstractCegarLoop]: Abstraction has 5363 states and 8531 transitions. [2022-11-22 01:22:54,852 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) [2022-11-22 01:22:54,852 INFO L276 IsEmpty]: Start isEmpty. Operand 5363 states and 8531 transitions. [2022-11-22 01:22:54,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-22 01:22:54,857 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:22:54,857 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] [2022-11-22 01:22:54,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 01:22:54,857 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:22:54,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:22:54,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1791997165, now seen corresponding path program 1 times [2022-11-22 01:22:54,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:22:54,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704539488] [2022-11-22 01:22:54,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:22:54,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:22:54,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:22:55,363 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:22:55,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:22:55,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704539488] [2022-11-22 01:22:55,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704539488] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:22:55,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:22:55,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-22 01:22:55,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133016497] [2022-11-22 01:22:55,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:22:55,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 01:22:55,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:22:55,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 01:22:55,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:22:55,366 INFO L87 Difference]: Start difference. First operand 5363 states and 8531 transitions. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 5 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-22 01:22:56,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:22:56,460 INFO L93 Difference]: Finished difference Result 10638 states and 17177 transitions. [2022-11-22 01:22:56,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 01:22:56,461 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 5 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 99 [2022-11-22 01:22:56,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:22:56,514 INFO L225 Difference]: With dead ends: 10638 [2022-11-22 01:22:56,515 INFO L226 Difference]: Without dead ends: 6049 [2022-11-22 01:22:56,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-22 01:22:56,555 INFO L413 NwaCegarLoop]: 822 mSDtfsCounter, 724 mSDsluCounter, 4240 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 5062 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:22:56,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [743 Valid, 5062 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:22:56,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6049 states. [2022-11-22 01:22:57,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6049 to 5975. [2022-11-22 01:22:57,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5975 states, 4462 states have (on average 1.5369789332138055) internal successors, (6858), 4550 states have internal predecessors, (6858), 1138 states have call successors, (1138), 294 states have call predecessors, (1138), 374 states have return successors, (1447), 1166 states have call predecessors, (1447), 1126 states have call successors, (1447) [2022-11-22 01:22:57,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5975 states to 5975 states and 9443 transitions. [2022-11-22 01:22:57,126 INFO L78 Accepts]: Start accepts. Automaton has 5975 states and 9443 transitions. Word has length 99 [2022-11-22 01:22:57,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:22:57,126 INFO L495 AbstractCegarLoop]: Abstraction has 5975 states and 9443 transitions. [2022-11-22 01:22:57,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 5 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-22 01:22:57,127 INFO L276 IsEmpty]: Start isEmpty. Operand 5975 states and 9443 transitions. [2022-11-22 01:22:57,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-22 01:22:57,131 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:22:57,131 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] [2022-11-22 01:22:57,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 01:22:57,132 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:22:57,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:22:57,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1587759635, now seen corresponding path program 1 times [2022-11-22 01:22:57,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:22:57,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641991374] [2022-11-22 01:22:57,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:22:57,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:22:57,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:22:57,485 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:22:57,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:22:57,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641991374] [2022-11-22 01:22:57,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641991374] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:22:57,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:22:57,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 01:22:57,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477375568] [2022-11-22 01:22:57,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:22:57,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:22:57,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:22:57,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:22:57,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:22:57,488 INFO L87 Difference]: Start difference. First operand 5975 states and 9443 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) [2022-11-22 01:23:00,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:23:00,690 INFO L93 Difference]: Finished difference Result 12130 states and 19437 transitions. [2022-11-22 01:23:00,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 01:23:00,691 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 [2022-11-22 01:23:00,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:23:00,738 INFO L225 Difference]: With dead ends: 12130 [2022-11-22 01:23:00,738 INFO L226 Difference]: Without dead ends: 7331 [2022-11-22 01:23:00,764 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 [2022-11-22 01:23:00,765 INFO L413 NwaCegarLoop]: 418 mSDtfsCounter, 1104 mSDsluCounter, 1321 mSDsCounter, 0 mSdLazyCounter, 3326 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1199 SdHoareTripleChecker+Valid, 1739 SdHoareTripleChecker+Invalid, 3744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 3326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:23:00,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1199 Valid, 1739 Invalid, 3744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 3326 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-22 01:23:00,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7331 states. [2022-11-22 01:23:01,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7331 to 6056. [2022-11-22 01:23:01,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6056 states, 4516 states have (on average 1.533215234720992) internal successors, (6924), 4616 states have internal predecessors, (6924), 1141 states have call successors, (1141), 309 states have call predecessors, (1141), 398 states have return successors, (1480), 1166 states have call predecessors, (1480), 1129 states have call successors, (1480) [2022-11-22 01:23:01,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6056 states to 6056 states and 9545 transitions. [2022-11-22 01:23:01,349 INFO L78 Accepts]: Start accepts. Automaton has 6056 states and 9545 transitions. Word has length 101 [2022-11-22 01:23:01,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:23:01,350 INFO L495 AbstractCegarLoop]: Abstraction has 6056 states and 9545 transitions. [2022-11-22 01:23:01,350 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) [2022-11-22 01:23:01,351 INFO L276 IsEmpty]: Start isEmpty. Operand 6056 states and 9545 transitions. [2022-11-22 01:23:01,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-22 01:23:01,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:23:01,355 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] [2022-11-22 01:23:01,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 01:23:01,355 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:23:01,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:23:01,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1128452899, now seen corresponding path program 1 times [2022-11-22 01:23:01,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:23:01,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725673726] [2022-11-22 01:23:01,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:23:01,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:23:01,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:23:01,528 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 01:23:01,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:23:01,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725673726] [2022-11-22 01:23:01,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725673726] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:23:01,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480620235] [2022-11-22 01:23:01,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:23:01,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:23:01,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:23:01,534 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:23:01,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 01:23:01,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:23:01,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 1601 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 01:23:01,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:23:01,929 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:23:01,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:23:01,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480620235] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:23:01,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:23:01,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2022-11-22 01:23:01,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126888147] [2022-11-22 01:23:01,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:23:01,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:23:01,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:23:01,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:23:01,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:23:01,932 INFO L87 Difference]: Start difference. First operand 6056 states and 9545 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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) [2022-11-22 01:23:02,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:23:02,488 INFO L93 Difference]: Finished difference Result 12187 states and 19521 transitions. [2022-11-22 01:23:02,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:23:02,489 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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 105 [2022-11-22 01:23:02,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:23:02,529 INFO L225 Difference]: With dead ends: 12187 [2022-11-22 01:23:02,529 INFO L226 Difference]: Without dead ends: 6146 [2022-11-22 01:23:02,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:23:02,577 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 [2022-11-22 01:23:02,579 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] [2022-11-22 01:23:02,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6146 states. [2022-11-22 01:23:03,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6146 to 6146. [2022-11-22 01:23:03,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6146 states, 4591 states have (on average 1.5277717272925289) internal successors, (7014), 4691 states have internal predecessors, (7014), 1141 states have call successors, (1141), 324 states have call predecessors, (1141), 413 states have return successors, (1480), 1166 states have call predecessors, (1480), 1129 states have call successors, (1480) [2022-11-22 01:23:03,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6146 states to 6146 states and 9635 transitions. [2022-11-22 01:23:03,311 INFO L78 Accepts]: Start accepts. Automaton has 6146 states and 9635 transitions. Word has length 105 [2022-11-22 01:23:03,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:23:03,312 INFO L495 AbstractCegarLoop]: Abstraction has 6146 states and 9635 transitions. [2022-11-22 01:23:03,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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) [2022-11-22 01:23:03,313 INFO L276 IsEmpty]: Start isEmpty. Operand 6146 states and 9635 transitions. [2022-11-22 01:23:03,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-22 01:23:03,318 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:23:03,318 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] [2022-11-22 01:23:03,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 01:23:03,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-22 01:23:03,526 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:23:03,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:23:03,527 INFO L85 PathProgramCache]: Analyzing trace with hash 2086146045, now seen corresponding path program 1 times [2022-11-22 01:23:03,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:23:03,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147579167] [2022-11-22 01:23:03,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:23:03,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:23:03,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:23:03,837 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:23:03,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:23:03,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147579167] [2022-11-22 01:23:03,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147579167] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:23:03,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045269714] [2022-11-22 01:23:03,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:23:03,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:23:03,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:23:03,840 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:23:03,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 01:23:04,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:23:04,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 1607 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 01:23:04,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:23:04,262 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 01:23:04,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:23:04,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045269714] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:23:04,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:23:04,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-11-22 01:23:04,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980937403] [2022-11-22 01:23:04,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:23:04,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:23:04,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:23:04,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:23:04,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:23:04,265 INFO L87 Difference]: Start difference. First operand 6146 states and 9635 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) [2022-11-22 01:23:04,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:23:04,925 INFO L93 Difference]: Finished difference Result 12322 states and 19540 transitions. [2022-11-22 01:23:04,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:23:04,926 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 [2022-11-22 01:23:04,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:23:04,957 INFO L225 Difference]: With dead ends: 12322 [2022-11-22 01:23:04,957 INFO L226 Difference]: Without dead ends: 6131 [2022-11-22 01:23:04,988 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 [2022-11-22 01:23:04,988 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 [2022-11-22 01:23:04,989 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] [2022-11-22 01:23:04,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6131 states. [2022-11-22 01:23:05,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6131 to 6131. [2022-11-22 01:23:05,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6131 states, 4576 states have (on average 1.519667832167832) internal successors, (6954), 4676 states have internal predecessors, (6954), 1141 states have call successors, (1141), 324 states have call predecessors, (1141), 413 states have return successors, (1480), 1166 states have call predecessors, (1480), 1129 states have call successors, (1480) [2022-11-22 01:23:05,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6131 states to 6131 states and 9575 transitions. [2022-11-22 01:23:05,438 INFO L78 Accepts]: Start accepts. Automaton has 6131 states and 9575 transitions. Word has length 108 [2022-11-22 01:23:05,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:23:05,439 INFO L495 AbstractCegarLoop]: Abstraction has 6131 states and 9575 transitions. [2022-11-22 01:23:05,439 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) [2022-11-22 01:23:05,439 INFO L276 IsEmpty]: Start isEmpty. Operand 6131 states and 9575 transitions. [2022-11-22 01:23:05,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-22 01:23:05,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:23:05,443 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] [2022-11-22 01:23:05,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 01:23:05,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:23:05,652 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:23:05,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:23:05,653 INFO L85 PathProgramCache]: Analyzing trace with hash 595661813, now seen corresponding path program 1 times [2022-11-22 01:23:05,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:23:05,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617946877] [2022-11-22 01:23:05,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:23:05,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:23:05,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:23:05,884 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 01:23:05,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:23:05,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617946877] [2022-11-22 01:23:05,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617946877] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:23:05,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55664233] [2022-11-22 01:23:05,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:23:05,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:23:05,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:23:05,887 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:23:05,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 01:23:06,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:23:06,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 1611 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 01:23:06,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:23:06,327 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:23:06,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:23:06,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55664233] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:23:06,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:23:06,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-11-22 01:23:06,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714152117] [2022-11-22 01:23:06,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:23:06,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:23:06,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:23:06,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:23:06,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:23:06,330 INFO L87 Difference]: Start difference. First operand 6131 states and 9575 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 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) [2022-11-22 01:23:08,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:23:08,121 INFO L93 Difference]: Finished difference Result 16209 states and 26464 transitions. [2022-11-22 01:23:08,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:23:08,121 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 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 109 [2022-11-22 01:23:08,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:23:08,183 INFO L225 Difference]: With dead ends: 16209 [2022-11-22 01:23:08,184 INFO L226 Difference]: Without dead ends: 10093 [2022-11-22 01:23:08,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-22 01:23:08,230 INFO L413 NwaCegarLoop]: 765 mSDtfsCounter, 628 mSDsluCounter, 1315 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 2080 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:23:08,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [631 Valid, 2080 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 830 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 01:23:08,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10093 states. [2022-11-22 01:23:08,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10093 to 9918. [2022-11-22 01:23:09,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9918 states, 7421 states have (on average 1.4888828998787225) internal successors, (11049), 7559 states have internal predecessors, (11049), 1840 states have call successors, (1840), 522 states have call predecessors, (1840), 656 states have return successors, (2829), 1896 states have call predecessors, (2829), 1820 states have call successors, (2829) [2022-11-22 01:23:09,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9918 states to 9918 states and 15718 transitions. [2022-11-22 01:23:09,082 INFO L78 Accepts]: Start accepts. Automaton has 9918 states and 15718 transitions. Word has length 109 [2022-11-22 01:23:09,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:23:09,083 INFO L495 AbstractCegarLoop]: Abstraction has 9918 states and 15718 transitions. [2022-11-22 01:23:09,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 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) [2022-11-22 01:23:09,083 INFO L276 IsEmpty]: Start isEmpty. Operand 9918 states and 15718 transitions. [2022-11-22 01:23:09,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-22 01:23:09,088 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:23:09,088 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] [2022-11-22 01:23:09,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 01:23:09,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-22 01:23:09,297 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:23:09,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:23:09,297 INFO L85 PathProgramCache]: Analyzing trace with hash 904226154, now seen corresponding path program 1 times [2022-11-22 01:23:09,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:23:09,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179758020] [2022-11-22 01:23:09,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:23:09,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:23:09,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:23:09,573 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:23:09,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:23:09,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179758020] [2022-11-22 01:23:09,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179758020] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:23:09,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330895600] [2022-11-22 01:23:09,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:23:09,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:23:09,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:23:09,576 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:23:09,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 01:23:09,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:23:09,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 1611 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 01:23:09,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:23:10,144 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 01:23:10,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:23:10,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330895600] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:23:10,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:23:10,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2022-11-22 01:23:10,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369176278] [2022-11-22 01:23:10,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:23:10,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:23:10,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:23:10,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:23:10,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-22 01:23:10,147 INFO L87 Difference]: Start difference. First operand 9918 states and 15718 transitions. Second operand has 6 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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) [2022-11-22 01:23:12,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:23:12,061 INFO L93 Difference]: Finished difference Result 22311 states and 36077 transitions. [2022-11-22 01:23:12,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 01:23:12,061 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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 109 [2022-11-22 01:23:12,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:23:12,162 INFO L225 Difference]: With dead ends: 22311 [2022-11-22 01:23:12,162 INFO L226 Difference]: Without dead ends: 12408 [2022-11-22 01:23:12,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-22 01:23:12,249 INFO L413 NwaCegarLoop]: 893 mSDtfsCounter, 697 mSDsluCounter, 2843 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 3736 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:23:12,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [698 Valid, 3736 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 01:23:12,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12408 states. [2022-11-22 01:23:13,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12408 to 12321. [2022-11-22 01:23:13,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12321 states, 9248 states have (on average 1.4726427335640138) internal successors, (13619), 9445 states have internal predecessors, (13619), 2157 states have call successors, (2157), 732 states have call predecessors, (2157), 915 states have return successors, (4390), 2203 states have call predecessors, (4390), 2121 states have call successors, (4390) [2022-11-22 01:23:13,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12321 states to 12321 states and 20166 transitions. [2022-11-22 01:23:13,503 INFO L78 Accepts]: Start accepts. Automaton has 12321 states and 20166 transitions. Word has length 109 [2022-11-22 01:23:13,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:23:13,504 INFO L495 AbstractCegarLoop]: Abstraction has 12321 states and 20166 transitions. [2022-11-22 01:23:13,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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) [2022-11-22 01:23:13,504 INFO L276 IsEmpty]: Start isEmpty. Operand 12321 states and 20166 transitions. [2022-11-22 01:23:13,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-22 01:23:13,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:23:13,509 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] [2022-11-22 01:23:13,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 01:23:13,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-22 01:23:13,718 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:23:13,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:23:13,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1938527968, now seen corresponding path program 1 times [2022-11-22 01:23:13,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:23:13,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210064629] [2022-11-22 01:23:13,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:23:13,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:23:13,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:23:13,923 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 01:23:13,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:23:13,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210064629] [2022-11-22 01:23:13,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210064629] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:23:13,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287539590] [2022-11-22 01:23:13,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:23:13,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:23:13,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:23:13,926 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:23:13,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 01:23:14,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:23:14,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 1614 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 01:23:14,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:23:14,341 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 01:23:14,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:23:14,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287539590] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:23:14,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:23:14,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-11-22 01:23:14,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202693000] [2022-11-22 01:23:14,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:23:14,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:23:14,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:23:14,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:23:14,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:23:14,344 INFO L87 Difference]: Start difference. First operand 12321 states and 20166 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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) [2022-11-22 01:23:15,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:23:15,334 INFO L93 Difference]: Finished difference Result 25127 states and 42908 transitions. [2022-11-22 01:23:15,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:23:15,335 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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 110 [2022-11-22 01:23:15,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:23:15,427 INFO L225 Difference]: With dead ends: 25127 [2022-11-22 01:23:15,427 INFO L226 Difference]: Without dead ends: 12829 [2022-11-22 01:23:15,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:23:15,563 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:23:15,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2445 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:23:15,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12829 states. [2022-11-22 01:23:16,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12829 to 12539. [2022-11-22 01:23:16,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12539 states, 9439 states have (on average 1.4630787159656744) internal successors, (13810), 9581 states have internal predecessors, (13810), 2157 states have call successors, (2157), 732 states have call predecessors, (2157), 942 states have return successors, (4472), 2285 states have call predecessors, (4472), 2121 states have call successors, (4472) [2022-11-22 01:23:16,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12539 states to 12539 states and 20439 transitions. [2022-11-22 01:23:16,814 INFO L78 Accepts]: Start accepts. Automaton has 12539 states and 20439 transitions. Word has length 110 [2022-11-22 01:23:16,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:23:16,815 INFO L495 AbstractCegarLoop]: Abstraction has 12539 states and 20439 transitions. [2022-11-22 01:23:16,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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) [2022-11-22 01:23:16,815 INFO L276 IsEmpty]: Start isEmpty. Operand 12539 states and 20439 transitions. [2022-11-22 01:23:16,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-22 01:23:16,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:23:16,819 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] [2022-11-22 01:23:16,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 01:23:17,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:23:17,028 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:23:17,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:23:17,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1900277471, now seen corresponding path program 1 times [2022-11-22 01:23:17,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:23:17,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629450492] [2022-11-22 01:23:17,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:23:17,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:23:17,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:23:17,319 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 01:23:17,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:23:17,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629450492] [2022-11-22 01:23:17,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629450492] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:23:17,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367551531] [2022-11-22 01:23:17,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:23:17,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:23:17,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:23:17,321 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:23:17,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 01:23:17,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:23:17,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 1617 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 01:23:17,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:23:17,762 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 01:23:17,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:23:17,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367551531] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:23:17,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:23:17,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-11-22 01:23:17,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926502724] [2022-11-22 01:23:17,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:23:17,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:23:17,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:23:17,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:23:17,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:23:17,765 INFO L87 Difference]: Start difference. First operand 12539 states and 20439 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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) [2022-11-22 01:23:18,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:23:18,961 INFO L93 Difference]: Finished difference Result 25671 states and 43113 transitions. [2022-11-22 01:23:18,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:23:18,962 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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 111 [2022-11-22 01:23:18,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:23:19,056 INFO L225 Difference]: With dead ends: 25671 [2022-11-22 01:23:19,056 INFO L226 Difference]: Without dead ends: 13156 [2022-11-22 01:23:19,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:23:19,209 INFO L413 NwaCegarLoop]: 599 mSDtfsCounter, 19 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:23:19,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 1675 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:23:19,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13156 states. [2022-11-22 01:23:20,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13156 to 13018. [2022-11-22 01:23:20,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13018 states, 9918 states have (on average 1.4713651945956847) internal successors, (14593), 10060 states have internal predecessors, (14593), 2157 states have call successors, (2157), 732 states have call predecessors, (2157), 942 states have return successors, (4472), 2285 states have call predecessors, (4472), 2121 states have call successors, (4472) [2022-11-22 01:23:20,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13018 states to 13018 states and 21222 transitions. [2022-11-22 01:23:20,549 INFO L78 Accepts]: Start accepts. Automaton has 13018 states and 21222 transitions. Word has length 111 [2022-11-22 01:23:20,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:23:20,550 INFO L495 AbstractCegarLoop]: Abstraction has 13018 states and 21222 transitions. [2022-11-22 01:23:20,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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) [2022-11-22 01:23:20,550 INFO L276 IsEmpty]: Start isEmpty. Operand 13018 states and 21222 transitions. [2022-11-22 01:23:20,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-22 01:23:20,556 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:23:20,556 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] [2022-11-22 01:23:20,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 01:23:20,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-22 01:23:20,765 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:23:20,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:23:20,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1895515147, now seen corresponding path program 1 times [2022-11-22 01:23:20,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:23:20,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871443243] [2022-11-22 01:23:20,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:23:20,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:23:20,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:23:21,087 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 01:23:21,087 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:23:21,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871443243] [2022-11-22 01:23:21,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871443243] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:23:21,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692604396] [2022-11-22 01:23:21,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:23:21,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:23:21,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:23:21,090 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:23:21,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 01:23:21,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:23:21,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 1619 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 01:23:21,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:23:21,635 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:23:21,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:23:21,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692604396] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:23:21,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:23:21,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-11-22 01:23:21,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001891543] [2022-11-22 01:23:21,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:23:21,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:23:21,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:23:21,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:23:21,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:23:21,638 INFO L87 Difference]: Start difference. First operand 13018 states and 21222 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2022-11-22 01:23:23,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:23:23,974 INFO L93 Difference]: Finished difference Result 34053 states and 59542 transitions. [2022-11-22 01:23:23,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:23:23,975 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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 113 [2022-11-22 01:23:23,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:23:24,166 INFO L225 Difference]: With dead ends: 34053 [2022-11-22 01:23:24,166 INFO L226 Difference]: Without dead ends: 22344 [2022-11-22 01:23:24,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-22 01:23:24,341 INFO L413 NwaCegarLoop]: 792 mSDtfsCounter, 624 mSDsluCounter, 1594 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 2386 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:23:24,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [626 Valid, 2386 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 898 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 01:23:24,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22344 states. [2022-11-22 01:23:26,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22344 to 21657. [2022-11-22 01:23:26,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21657 states, 16515 states have (on average 1.470541931577354) internal successors, (24286), 16747 states have internal predecessors, (24286), 3611 states have call successors, (3611), 1220 states have call predecessors, (3611), 1530 states have return successors, (9320), 3797 states have call predecessors, (9320), 3550 states have call successors, (9320) [2022-11-22 01:23:26,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21657 states to 21657 states and 37217 transitions. [2022-11-22 01:23:26,421 INFO L78 Accepts]: Start accepts. Automaton has 21657 states and 37217 transitions. Word has length 113 [2022-11-22 01:23:26,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:23:26,422 INFO L495 AbstractCegarLoop]: Abstraction has 21657 states and 37217 transitions. [2022-11-22 01:23:26,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2022-11-22 01:23:26,422 INFO L276 IsEmpty]: Start isEmpty. Operand 21657 states and 37217 transitions. [2022-11-22 01:23:26,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-22 01:23:26,428 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:23:26,428 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] [2022-11-22 01:23:26,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 01:23:26,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-22 01:23:26,637 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:23:26,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:23:26,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1322635336, now seen corresponding path program 1 times [2022-11-22 01:23:26,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:23:26,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036341248] [2022-11-22 01:23:26,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:23:26,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:23:26,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:23:26,799 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 01:23:26,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:23:26,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036341248] [2022-11-22 01:23:26,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036341248] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:23:26,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079852498] [2022-11-22 01:23:26,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:23:26,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:23:26,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:23:26,801 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:23:26,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 01:23:27,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:23:27,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 1619 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:23:27,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:23:27,176 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 01:23:27,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:23:27,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079852498] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:23:27,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:23:27,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2022-11-22 01:23:27,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710596754] [2022-11-22 01:23:27,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:23:27,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:23:27,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:23:27,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:23:27,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:23:27,179 INFO L87 Difference]: Start difference. First operand 21657 states and 37217 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) [2022-11-22 01:23:29,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:23:29,384 INFO L93 Difference]: Finished difference Result 43874 states and 78989 transitions. [2022-11-22 01:23:29,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:23:29,385 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 [2022-11-22 01:23:29,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:23:29,815 INFO L225 Difference]: With dead ends: 43874 [2022-11-22 01:23:29,815 INFO L226 Difference]: Without dead ends: 22241 [2022-11-22 01:23:30,144 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 [2022-11-22 01:23:30,146 INFO L413 NwaCegarLoop]: 613 mSDtfsCounter, 4 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1801 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:23:30,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1801 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:23:30,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22241 states. [2022-11-22 01:23:31,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22241 to 21743. [2022-11-22 01:23:31,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21743 states, 16601 states have (on average 1.4581049334377447) internal successors, (24206), 16833 states have internal predecessors, (24206), 3611 states have call successors, (3611), 1220 states have call predecessors, (3611), 1530 states have return successors, (9320), 3797 states have call predecessors, (9320), 3550 states have call successors, (9320) [2022-11-22 01:23:31,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21743 states to 21743 states and 37137 transitions. [2022-11-22 01:23:31,996 INFO L78 Accepts]: Start accepts. Automaton has 21743 states and 37137 transitions. Word has length 114 [2022-11-22 01:23:31,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:23:31,997 INFO L495 AbstractCegarLoop]: Abstraction has 21743 states and 37137 transitions. [2022-11-22 01:23:31,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (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) [2022-11-22 01:23:31,997 INFO L276 IsEmpty]: Start isEmpty. Operand 21743 states and 37137 transitions. [2022-11-22 01:23:32,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-22 01:23:32,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:23:32,001 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] [2022-11-22 01:23:32,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 01:23:32,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-22 01:23:32,209 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:23:32,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:23:32,210 INFO L85 PathProgramCache]: Analyzing trace with hash 2096338188, now seen corresponding path program 1 times [2022-11-22 01:23:32,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:23:32,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272575876] [2022-11-22 01:23:32,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:23:32,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:23:32,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:23:32,621 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 01:23:32,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:23:32,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272575876] [2022-11-22 01:23:32,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272575876] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:23:32,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738139879] [2022-11-22 01:23:32,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:23:32,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:23:32,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:23:32,623 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:23:32,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 01:23:32,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:23:32,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 1620 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 01:23:33,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:23:33,066 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:23:33,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:23:33,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738139879] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:23:33,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:23:33,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-11-22 01:23:33,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758342053] [2022-11-22 01:23:33,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:23:33,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:23:33,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:23:33,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:23:33,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:23:33,069 INFO L87 Difference]: Start difference. First operand 21743 states and 37137 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) [2022-11-22 01:23:36,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:23:36,731 INFO L93 Difference]: Finished difference Result 51399 states and 92803 transitions. [2022-11-22 01:23:36,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:23:36,732 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 [2022-11-22 01:23:36,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:23:37,088 INFO L225 Difference]: With dead ends: 51399 [2022-11-22 01:23:37,088 INFO L226 Difference]: Without dead ends: 30993 [2022-11-22 01:23:37,507 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 [2022-11-22 01:23:37,508 INFO L413 NwaCegarLoop]: 791 mSDtfsCounter, 657 mSDsluCounter, 1332 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 2123 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:23:37,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [659 Valid, 2123 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 01:23:37,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30993 states. [2022-11-22 01:23:39,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30993 to 30358. [2022-11-22 01:23:39,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30358 states, 23176 states have (on average 1.458620987228167) internal successors, (33805), 23498 states have internal predecessors, (33805), 5065 states have call successors, (5065), 1706 states have call predecessors, (5065), 2116 states have return successors, (15524), 5309 states have call predecessors, (15524), 4979 states have call successors, (15524) [2022-11-22 01:23:40,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30358 states to 30358 states and 54394 transitions. [2022-11-22 01:23:40,328 INFO L78 Accepts]: Start accepts. Automaton has 30358 states and 54394 transitions. Word has length 114 [2022-11-22 01:23:40,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:23:40,329 INFO L495 AbstractCegarLoop]: Abstraction has 30358 states and 54394 transitions. [2022-11-22 01:23:40,329 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) [2022-11-22 01:23:40,329 INFO L276 IsEmpty]: Start isEmpty. Operand 30358 states and 54394 transitions. [2022-11-22 01:23:40,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-22 01:23:40,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:23:40,335 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, 1, 1] [2022-11-22 01:23:40,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-22 01:23:40,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-22 01:23:40,542 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:23:40,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:23:40,543 INFO L85 PathProgramCache]: Analyzing trace with hash 2059966260, now seen corresponding path program 1 times [2022-11-22 01:23:40,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:23:40,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929861202] [2022-11-22 01:23:40,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:23:40,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:23:40,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:23:40,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 01:23:40,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:23:40,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929861202] [2022-11-22 01:23:40,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929861202] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:23:40,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006843053] [2022-11-22 01:23:40,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:23:40,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:23:40,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:23:40,815 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:23:40,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 01:23:41,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:23:41,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 1622 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 01:23:41,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:23:41,253 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:23:41,253 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:23:41,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006843053] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:23:41,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:23:41,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-11-22 01:23:41,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601357149] [2022-11-22 01:23:41,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:23:41,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:23:41,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:23:41,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:23:41,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:23:41,256 INFO L87 Difference]: Start difference. First operand 30358 states and 54394 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 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) [2022-11-22 01:23:45,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:23:45,987 INFO L93 Difference]: Finished difference Result 66656 states and 123966 transitions. [2022-11-22 01:23:45,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:23:45,987 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 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 116 [2022-11-22 01:23:45,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:23:46,245 INFO L225 Difference]: With dead ends: 66656 [2022-11-22 01:23:46,245 INFO L226 Difference]: Without dead ends: 37657 [2022-11-22 01:23:46,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-22 01:23:46,906 INFO L413 NwaCegarLoop]: 790 mSDtfsCounter, 657 mSDsluCounter, 1570 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 2360 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:23:46,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [659 Valid, 2360 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-22 01:23:46,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37657 states. [2022-11-22 01:23:50,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37657 to 36376. [2022-11-22 01:23:50,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36376 states, 27565 states have (on average 1.4610194086704154) internal successors, (40273), 28015 states have internal predecessors, (40273), 6262 states have call successors, (6262), 2106 states have call predecessors, (6262), 2548 states have return successors, (20609), 6458 states have call predecessors, (20609), 6159 states have call successors, (20609) [2022-11-22 01:23:50,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36376 states to 36376 states and 67144 transitions. [2022-11-22 01:23:50,691 INFO L78 Accepts]: Start accepts. Automaton has 36376 states and 67144 transitions. Word has length 116 [2022-11-22 01:23:50,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:23:50,691 INFO L495 AbstractCegarLoop]: Abstraction has 36376 states and 67144 transitions. [2022-11-22 01:23:50,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 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) [2022-11-22 01:23:50,692 INFO L276 IsEmpty]: Start isEmpty. Operand 36376 states and 67144 transitions. [2022-11-22 01:23:50,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-22 01:23:50,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:23:50,697 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, 1, 1] [2022-11-22 01:23:50,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-22 01:23:50,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:23:50,905 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:23:50,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:23:50,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1424330264, now seen corresponding path program 1 times [2022-11-22 01:23:50,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:23:50,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337430731] [2022-11-22 01:23:50,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:23:50,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:23:50,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:23:51,104 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-22 01:23:51,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:23:51,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337430731] [2022-11-22 01:23:51,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337430731] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:23:51,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623266289] [2022-11-22 01:23:51,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:23:51,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:23:51,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:23:51,107 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:23:51,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f801622f-9af5-41d0-a3b3-da5de7218711/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-22 01:23:51,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:23:51,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 1619 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 01:23:51,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:23:51,787 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:23:51,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:23:52,072 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 01:23:52,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623266289] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:23:52,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [804569490] [2022-11-22 01:23:52,100 INFO L159 IcfgInterpreter]: Started Sifa with 102 locations of interest [2022-11-22 01:23:52,100 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:23:52,104 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:23:52,110 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:23:52,111 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs