./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product31.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW --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 752f24c6361e3daac9b48908e677c53c177497426b343006dfb6bc7474fe1fb2 --- 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-4e7fbc6 [2022-11-23 15:36:22,441 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:36:22,443 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:36:22,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:36:22,489 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:36:22,490 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:36:22,492 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:36:22,493 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:36:22,495 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:36:22,496 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:36:22,497 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:36:22,509 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:36:22,509 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:36:22,510 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:36:22,512 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:36:22,513 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:36:22,514 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:36:22,515 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:36:22,517 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:36:22,523 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:36:22,528 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:36:22,533 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:36:22,536 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:36:22,537 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:36:22,550 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:36:22,551 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:36:22,551 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:36:22,552 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:36:22,552 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:36:22,553 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:36:22,554 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:36:22,554 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:36:22,555 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:36:22,556 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:36:22,557 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:36:22,557 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:36:22,558 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:36:22,562 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:36:22,562 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:36:22,564 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:36:22,564 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:36:22,565 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:36:22,605 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:36:22,605 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:36:22,606 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:36:22,606 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:36:22,607 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:36:22,608 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:36:22,608 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:36:22,608 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:36:22,609 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:36:22,609 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:36:22,610 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:36:22,610 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:36:22,610 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:36:22,611 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:36:22,611 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:36:22,611 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:36:22,611 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:36:22,612 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:36:22,612 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:36:22,613 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:36:22,613 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:36:22,613 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:36:22,613 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:36:22,613 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:36:22,614 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:36:22,614 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:36:22,615 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:36:22,615 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:36:22,615 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:36:22,615 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:36:22,616 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:36:22,616 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:36:22,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:36:22,617 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:36:22,617 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:36:22,617 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:36:22,617 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:36:22,617 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:36:22,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:36:22,618 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:36:22,618 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:36:22,618 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_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 752f24c6361e3daac9b48908e677c53c177497426b343006dfb6bc7474fe1fb2 [2022-11-23 15:36:22,910 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:36:22,940 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:36:22,943 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:36:22,944 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:36:22,945 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:36:22,946 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/product-lines/elevator_spec3_product31.cil.c [2022-11-23 15:36:25,997 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:36:26,381 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:36:26,381 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/sv-benchmarks/c/product-lines/elevator_spec3_product31.cil.c [2022-11-23 15:36:26,414 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/data/6aff6f507/e0590cf117c349eb82cf10d31de01ec2/FLAGeeb80107d [2022-11-23 15:36:26,433 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/data/6aff6f507/e0590cf117c349eb82cf10d31de01ec2 [2022-11-23 15:36:26,437 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:36:26,440 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:36:26,443 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:36:26,444 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:36:26,447 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:36:26,448 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:36:26" (1/1) ... [2022-11-23 15:36:26,450 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b4f255e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:26, skipping insertion in model container [2022-11-23 15:36:26,451 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:36:26" (1/1) ... [2022-11-23 15:36:26,458 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:36:26,540 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:36:26,727 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_ca9f469c-a13e-4af9-9fb8-461e36384964/sv-benchmarks/c/product-lines/elevator_spec3_product31.cil.c[1545,1558] [2022-11-23 15:36:27,108 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:36:27,128 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:36:27,150 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_ca9f469c-a13e-4af9-9fb8-461e36384964/sv-benchmarks/c/product-lines/elevator_spec3_product31.cil.c[1545,1558] [2022-11-23 15:36:27,253 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:36:27,286 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:36:27,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:27 WrapperNode [2022-11-23 15:36:27,287 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:36:27,288 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:36:27,288 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:36:27,288 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:36:27,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:27" (1/1) ... [2022-11-23 15:36:27,329 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:27" (1/1) ... [2022-11-23 15:36:27,387 INFO L138 Inliner]: procedures = 95, calls = 355, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 989 [2022-11-23 15:36:27,387 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:36:27,388 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:36:27,388 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:36:27,388 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:36:27,398 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:27" (1/1) ... [2022-11-23 15:36:27,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:27" (1/1) ... [2022-11-23 15:36:27,405 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:27" (1/1) ... [2022-11-23 15:36:27,405 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:27" (1/1) ... [2022-11-23 15:36:27,425 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:27" (1/1) ... [2022-11-23 15:36:27,438 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:27" (1/1) ... [2022-11-23 15:36:27,444 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:27" (1/1) ... [2022-11-23 15:36:27,448 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:27" (1/1) ... [2022-11-23 15:36:27,457 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:36:27,458 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:36:27,458 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:36:27,459 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:36:27,460 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:27" (1/1) ... [2022-11-23 15:36:27,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:36:27,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:36:27,496 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:36:27,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:36:27,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:36:27,591 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-23 15:36:27,591 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-23 15:36:27,591 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-23 15:36:27,591 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-23 15:36:27,591 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-23 15:36:27,591 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-23 15:36:27,592 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-23 15:36:27,592 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-23 15:36:27,592 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-23 15:36:27,592 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-23 15:36:27,592 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-23 15:36:27,592 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-23 15:36:27,593 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-23 15:36:27,593 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-23 15:36:27,593 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-23 15:36:27,593 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-23 15:36:27,594 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-11-23 15:36:27,594 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-11-23 15:36:27,594 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-23 15:36:27,594 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-23 15:36:27,595 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-23 15:36:27,595 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-23 15:36:27,596 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-23 15:36:27,596 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-23 15:36:27,597 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-23 15:36:27,597 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-23 15:36:27,597 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-23 15:36:27,597 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-23 15:36:27,597 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-23 15:36:27,599 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-23 15:36:27,599 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-23 15:36:27,599 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-23 15:36:27,600 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-11-23 15:36:27,600 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-11-23 15:36:27,600 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-23 15:36:27,600 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-23 15:36:27,600 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-11-23 15:36:27,601 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-11-23 15:36:27,601 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-23 15:36:27,601 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-23 15:36:27,601 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-23 15:36:27,602 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-23 15:36:27,602 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-23 15:36:27,602 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-23 15:36:27,602 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-23 15:36:27,603 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-23 15:36:27,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:36:27,603 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-23 15:36:27,604 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-23 15:36:27,604 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-23 15:36:27,604 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-23 15:36:27,605 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-23 15:36:27,605 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-23 15:36:27,605 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-23 15:36:27,606 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-23 15:36:27,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:36:27,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:36:27,606 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-23 15:36:27,606 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-23 15:36:27,803 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:36:27,805 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:36:29,112 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:36:30,026 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:36:30,026 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 15:36:30,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:36:30 BoogieIcfgContainer [2022-11-23 15:36:30,032 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:36:30,035 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:36:30,035 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:36:30,038 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:36:30,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:36:26" (1/3) ... [2022-11-23 15:36:30,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14107a07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:36:30, skipping insertion in model container [2022-11-23 15:36:30,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:27" (2/3) ... [2022-11-23 15:36:30,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14107a07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:36:30, skipping insertion in model container [2022-11-23 15:36:30,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:36:30" (3/3) ... [2022-11-23 15:36:30,044 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product31.cil.c [2022-11-23 15:36:30,065 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:36:30,066 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:36:30,153 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:36:30,162 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;@479ebe7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:36:30,163 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:36:30,171 INFO L276 IsEmpty]: Start isEmpty. Operand has 427 states, 284 states have (on average 1.556338028169014) internal successors, (442), 302 states have internal predecessors, (442), 113 states have call successors, (113), 28 states have call predecessors, (113), 28 states have return successors, (113), 110 states have call predecessors, (113), 113 states have call successors, (113) [2022-11-23 15:36:30,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-23 15:36:30,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:36:30,206 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:36:30,207 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:36:30,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:36:30,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1810760911, now seen corresponding path program 1 times [2022-11-23 15:36:30,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:36:30,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214920414] [2022-11-23 15:36:30,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:36:30,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:36:30,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:36:31,400 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-23 15:36:31,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:36:31,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214920414] [2022-11-23 15:36:31,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214920414] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:36:31,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:36:31,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 15:36:31,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15065758] [2022-11-23 15:36:31,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:36:31,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:36:31,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:36:31,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:36:31,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:36:31,461 INFO L87 Difference]: Start difference. First operand has 427 states, 284 states have (on average 1.556338028169014) internal successors, (442), 302 states have internal predecessors, (442), 113 states have call successors, (113), 28 states have call predecessors, (113), 28 states have return successors, (113), 110 states have call predecessors, (113), 113 states have call successors, (113) Second operand has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 15:36:32,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:36:32,912 INFO L93 Difference]: Finished difference Result 1496 states and 2438 transitions. [2022-11-23 15:36:32,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 15:36:32,918 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 88 [2022-11-23 15:36:32,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:36:32,948 INFO L225 Difference]: With dead ends: 1496 [2022-11-23 15:36:32,949 INFO L226 Difference]: Without dead ends: 1071 [2022-11-23 15:36:32,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:36:33,002 INFO L413 NwaCegarLoop]: 976 mSDtfsCounter, 884 mSDsluCounter, 3295 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 956 SdHoareTripleChecker+Valid, 4271 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:36:33,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [956 Valid, 4271 Invalid, 842 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [86 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-23 15:36:33,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2022-11-23 15:36:33,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 788. [2022-11-23 15:36:33,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 536 states have (on average 1.5485074626865671) internal successors, (830), 566 states have internal predecessors, (830), 203 states have call successors, (203), 51 states have call predecessors, (203), 48 states have return successors, (213), 190 states have call predecessors, (213), 199 states have call successors, (213) [2022-11-23 15:36:33,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1246 transitions. [2022-11-23 15:36:33,207 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1246 transitions. Word has length 88 [2022-11-23 15:36:33,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:36:33,209 INFO L495 AbstractCegarLoop]: Abstraction has 788 states and 1246 transitions. [2022-11-23 15:36:33,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 15:36:33,209 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1246 transitions. [2022-11-23 15:36:33,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-23 15:36:33,217 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:36:33,218 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:36:33,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:36:33,218 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:36:33,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:36:33,219 INFO L85 PathProgramCache]: Analyzing trace with hash 912651686, now seen corresponding path program 1 times [2022-11-23 15:36:33,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:36:33,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213249782] [2022-11-23 15:36:33,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:36:33,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:36:33,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:36:33,688 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:36:33,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:36:33,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213249782] [2022-11-23 15:36:33,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213249782] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:36:33,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942633898] [2022-11-23 15:36:33,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:36:33,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:36:33,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:36:33,694 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:36:33,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:36:34,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:36:34,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 1584 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:36:34,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:36:34,270 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:36:34,270 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:36:34,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942633898] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:36:34,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:36:34,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-23 15:36:34,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705957794] [2022-11-23 15:36:34,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:36:34,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:36:34,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:36:34,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:36:34,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:36:34,274 INFO L87 Difference]: Start difference. First operand 788 states and 1246 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-23 15:36:34,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:36:34,561 INFO L93 Difference]: Finished difference Result 2240 states and 3607 transitions. [2022-11-23 15:36:34,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:36:34,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 87 [2022-11-23 15:36:34,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:36:34,572 INFO L225 Difference]: With dead ends: 2240 [2022-11-23 15:36:34,572 INFO L226 Difference]: Without dead ends: 1464 [2022-11-23 15:36:34,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:36:34,580 INFO L413 NwaCegarLoop]: 1076 mSDtfsCounter, 591 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 1605 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:36:34,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [591 Valid, 1605 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:36:34,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2022-11-23 15:36:34,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1431. [2022-11-23 15:36:34,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1431 states, 980 states have (on average 1.5561224489795917) internal successors, (1525), 1039 states have internal predecessors, (1525), 359 states have call successors, (359), 92 states have call predecessors, (359), 91 states have return successors, (392), 339 states have call predecessors, (392), 355 states have call successors, (392) [2022-11-23 15:36:34,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1431 states to 1431 states and 2276 transitions. [2022-11-23 15:36:34,676 INFO L78 Accepts]: Start accepts. Automaton has 1431 states and 2276 transitions. Word has length 87 [2022-11-23 15:36:34,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:36:34,677 INFO L495 AbstractCegarLoop]: Abstraction has 1431 states and 2276 transitions. [2022-11-23 15:36:34,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-23 15:36:34,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states and 2276 transitions. [2022-11-23 15:36:34,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-23 15:36:34,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:36:34,682 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:36:34,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 15:36:34,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-23 15:36:34,891 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:36:34,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:36:34,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1777778450, now seen corresponding path program 1 times [2022-11-23 15:36:34,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:36:34,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818603446] [2022-11-23 15:36:34,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:36:34,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:36:34,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:36:35,280 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:36:35,280 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:36:35,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818603446] [2022-11-23 15:36:35,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818603446] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:36:35,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451130483] [2022-11-23 15:36:35,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:36:35,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:36:35,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:36:35,287 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:36:35,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:36:35,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:36:35,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 1597 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:36:35,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:36:35,754 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 15:36:35,754 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:36:35,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451130483] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:36:35,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:36:35,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-23 15:36:35,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968988585] [2022-11-23 15:36:35,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:36:35,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:36:35,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:36:35,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:36:35,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:36:35,761 INFO L87 Difference]: Start difference. First operand 1431 states and 2276 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-23 15:36:35,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:36:35,981 INFO L93 Difference]: Finished difference Result 3095 states and 5008 transitions. [2022-11-23 15:36:35,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:36:35,982 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 89 [2022-11-23 15:36:35,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:36:35,993 INFO L225 Difference]: With dead ends: 3095 [2022-11-23 15:36:35,994 INFO L226 Difference]: Without dead ends: 1676 [2022-11-23 15:36:36,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:36:36,012 INFO L413 NwaCegarLoop]: 811 mSDtfsCounter, 104 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 1456 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:36:36,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 1456 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:36:36,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1676 states. [2022-11-23 15:36:36,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 1459. [2022-11-23 15:36:36,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1459 states, 1004 states have (on average 1.546812749003984) internal successors, (1553), 1063 states have internal predecessors, (1553), 363 states have call successors, (363), 92 states have call predecessors, (363), 91 states have return successors, (396), 343 states have call predecessors, (396), 359 states have call successors, (396) [2022-11-23 15:36:36,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1459 states to 1459 states and 2312 transitions. [2022-11-23 15:36:36,115 INFO L78 Accepts]: Start accepts. Automaton has 1459 states and 2312 transitions. Word has length 89 [2022-11-23 15:36:36,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:36:36,115 INFO L495 AbstractCegarLoop]: Abstraction has 1459 states and 2312 transitions. [2022-11-23 15:36:36,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-23 15:36:36,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1459 states and 2312 transitions. [2022-11-23 15:36:36,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-23 15:36:36,119 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:36:36,119 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:36:36,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:36:36,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:36:36,329 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:36:36,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:36:36,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1784856255, now seen corresponding path program 1 times [2022-11-23 15:36:36,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:36:36,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481406820] [2022-11-23 15:36:36,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:36:36,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:36:36,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:36:36,781 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:36:36,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:36:36,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481406820] [2022-11-23 15:36:36,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481406820] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:36:36,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749877291] [2022-11-23 15:36:36,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:36:36,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:36:36,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:36:36,791 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:36:36,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:36:37,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:36:37,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 1585 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:36:37,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:36:37,283 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:36:37,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:36:37,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749877291] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:36:37,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:36:37,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-23 15:36:37,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909722982] [2022-11-23 15:36:37,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:36:37,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:36:37,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:36:37,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:36:37,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:36:37,286 INFO L87 Difference]: Start difference. First operand 1459 states and 2312 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-23 15:36:37,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:36:37,572 INFO L93 Difference]: Finished difference Result 3582 states and 5751 transitions. [2022-11-23 15:36:37,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:36:37,573 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 88 [2022-11-23 15:36:37,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:36:37,596 INFO L225 Difference]: With dead ends: 3582 [2022-11-23 15:36:37,596 INFO L226 Difference]: Without dead ends: 2135 [2022-11-23 15:36:37,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:36:37,611 INFO L413 NwaCegarLoop]: 1114 mSDtfsCounter, 591 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 1643 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:36:37,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [591 Valid, 1643 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:36:37,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2022-11-23 15:36:37,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 2090. [2022-11-23 15:36:37,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2090 states, 1442 states have (on average 1.552011095700416) internal successors, (2238), 1530 states have internal predecessors, (2238), 516 states have call successors, (516), 130 states have call predecessors, (516), 131 states have return successors, (572), 489 states have call predecessors, (572), 512 states have call successors, (572) [2022-11-23 15:36:37,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2090 states to 2090 states and 3326 transitions. [2022-11-23 15:36:37,779 INFO L78 Accepts]: Start accepts. Automaton has 2090 states and 3326 transitions. Word has length 88 [2022-11-23 15:36:37,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:36:37,780 INFO L495 AbstractCegarLoop]: Abstraction has 2090 states and 3326 transitions. [2022-11-23 15:36:37,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-23 15:36:37,780 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states and 3326 transitions. [2022-11-23 15:36:37,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-23 15:36:37,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:36:37,786 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:36:37,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 15:36:37,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:36:37,994 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:36:37,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:36:37,994 INFO L85 PathProgramCache]: Analyzing trace with hash 176250410, now seen corresponding path program 1 times [2022-11-23 15:36:37,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:36:37,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326260600] [2022-11-23 15:36:37,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:36:37,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:36:38,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:36:38,246 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 15:36:38,246 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:36:38,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326260600] [2022-11-23 15:36:38,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326260600] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:36:38,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352058932] [2022-11-23 15:36:38,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:36:38,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:36:38,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:36:38,249 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:36:38,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:36:38,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:36:38,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 1598 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 15:36:38,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:36:38,764 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 15:36:38,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:36:38,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352058932] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:36:38,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:36:38,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-23 15:36:38,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446321254] [2022-11-23 15:36:38,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:36:38,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:36:38,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:36:38,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:36:38,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-23 15:36:38,791 INFO L87 Difference]: Start difference. First operand 2090 states and 3326 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-23 15:36:40,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:36:40,094 INFO L93 Difference]: Finished difference Result 6048 states and 9920 transitions. [2022-11-23 15:36:40,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:36:40,096 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 89 [2022-11-23 15:36:40,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:36:40,130 INFO L225 Difference]: With dead ends: 6048 [2022-11-23 15:36:40,130 INFO L226 Difference]: Without dead ends: 3970 [2022-11-23 15:36:40,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-23 15:36:40,158 INFO L413 NwaCegarLoop]: 734 mSDtfsCounter, 663 mSDsluCounter, 2389 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 723 SdHoareTripleChecker+Valid, 3123 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 15:36:40,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [723 Valid, 3123 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 15:36:40,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3970 states. [2022-11-23 15:36:40,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3970 to 3942. [2022-11-23 15:36:40,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3942 states, 2633 states have (on average 1.4899354348651728) internal successors, (3923), 2854 states have internal predecessors, (3923), 1077 states have call successors, (1077), 232 states have call predecessors, (1077), 231 states have return successors, (1271), 991 states have call predecessors, (1271), 1071 states have call successors, (1271) [2022-11-23 15:36:40,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3942 states to 3942 states and 6271 transitions. [2022-11-23 15:36:40,500 INFO L78 Accepts]: Start accepts. Automaton has 3942 states and 6271 transitions. Word has length 89 [2022-11-23 15:36:40,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:36:40,502 INFO L495 AbstractCegarLoop]: Abstraction has 3942 states and 6271 transitions. [2022-11-23 15:36:40,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-23 15:36:40,503 INFO L276 IsEmpty]: Start isEmpty. Operand 3942 states and 6271 transitions. [2022-11-23 15:36:40,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-23 15:36:40,505 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:36:40,506 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:36:40,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 15:36:40,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:36:40,714 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:36:40,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:36:40,714 INFO L85 PathProgramCache]: Analyzing trace with hash 10723131, now seen corresponding path program 1 times [2022-11-23 15:36:40,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:36:40,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582144322] [2022-11-23 15:36:40,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:36:40,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:36:40,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:36:41,612 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-23 15:36:41,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:36:41,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582144322] [2022-11-23 15:36:41,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582144322] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:36:41,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494466453] [2022-11-23 15:36:41,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:36:41,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:36:41,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:36:41,614 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:36:41,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 15:36:41,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:36:41,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 1612 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 15:36:41,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:36:42,286 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:36:42,287 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:36:42,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494466453] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:36:42,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:36:42,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 15 [2022-11-23 15:36:42,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759953076] [2022-11-23 15:36:42,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:36:42,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:36:42,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:36:42,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:36:42,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-11-23 15:36:42,289 INFO L87 Difference]: Start difference. First operand 3942 states and 6271 transitions. Second operand has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-23 15:36:45,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:36:45,015 INFO L93 Difference]: Finished difference Result 9702 states and 15771 transitions. [2022-11-23 15:36:45,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 15:36:45,016 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 94 [2022-11-23 15:36:45,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:36:45,066 INFO L225 Difference]: With dead ends: 9702 [2022-11-23 15:36:45,066 INFO L226 Difference]: Without dead ends: 5772 [2022-11-23 15:36:45,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-23 15:36:45,104 INFO L413 NwaCegarLoop]: 854 mSDtfsCounter, 1407 mSDsluCounter, 1583 mSDsCounter, 0 mSdLazyCounter, 2135 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1464 SdHoareTripleChecker+Valid, 2437 SdHoareTripleChecker+Invalid, 2214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 2135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:36:45,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1464 Valid, 2437 Invalid, 2214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 2135 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-23 15:36:45,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5772 states. [2022-11-23 15:36:45,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5772 to 4326. [2022-11-23 15:36:45,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4326 states, 2917 states have (on average 1.4730887898525882) internal successors, (4297), 3146 states have internal predecessors, (4297), 1149 states have call successors, (1149), 264 states have call predecessors, (1149), 259 states have return successors, (1351), 1051 states have call predecessors, (1351), 1143 states have call successors, (1351) [2022-11-23 15:36:45,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4326 states to 4326 states and 6797 transitions. [2022-11-23 15:36:45,532 INFO L78 Accepts]: Start accepts. Automaton has 4326 states and 6797 transitions. Word has length 94 [2022-11-23 15:36:45,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:36:45,533 INFO L495 AbstractCegarLoop]: Abstraction has 4326 states and 6797 transitions. [2022-11-23 15:36:45,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-23 15:36:45,533 INFO L276 IsEmpty]: Start isEmpty. Operand 4326 states and 6797 transitions. [2022-11-23 15:36:45,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-23 15:36:45,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:36:45,536 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:36:45,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 15:36:45,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:36:45,745 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:36:45,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:36:45,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1252411982, now seen corresponding path program 1 times [2022-11-23 15:36:45,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:36:45,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612003876] [2022-11-23 15:36:45,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:36:45,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:36:45,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:36:46,525 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-23 15:36:46,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:36:46,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612003876] [2022-11-23 15:36:46,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612003876] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:36:46,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885510340] [2022-11-23 15:36:46,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:36:46,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:36:46,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:36:46,531 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:36:46,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 15:36:46,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:36:46,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 1636 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 15:36:46,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:36:46,999 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:36:46,999 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:36:47,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885510340] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:36:47,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:36:47,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-11-23 15:36:47,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159299923] [2022-11-23 15:36:47,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:36:47,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:36:47,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:36:47,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:36:47,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-23 15:36:47,003 INFO L87 Difference]: Start difference. First operand 4326 states and 6797 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 15:36:47,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:36:47,916 INFO L93 Difference]: Finished difference Result 8963 states and 14386 transitions. [2022-11-23 15:36:47,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:36:47,916 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 101 [2022-11-23 15:36:47,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:36:47,961 INFO L225 Difference]: With dead ends: 8963 [2022-11-23 15:36:47,961 INFO L226 Difference]: Without dead ends: 5502 [2022-11-23 15:36:47,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-11-23 15:36:47,985 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 141 mSDsluCounter, 3279 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 3959 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:36:47,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 3959 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:36:47,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5502 states. [2022-11-23 15:36:48,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5502 to 4560. [2022-11-23 15:36:48,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4560 states, 3079 states have (on average 1.4670347515427087) internal successors, (4517), 3329 states have internal predecessors, (4517), 1208 states have call successors, (1208), 264 states have call predecessors, (1208), 272 states have return successors, (1450), 1120 states have call predecessors, (1450), 1202 states have call successors, (1450) [2022-11-23 15:36:48,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4560 states to 4560 states and 7175 transitions. [2022-11-23 15:36:48,502 INFO L78 Accepts]: Start accepts. Automaton has 4560 states and 7175 transitions. Word has length 101 [2022-11-23 15:36:48,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:36:48,502 INFO L495 AbstractCegarLoop]: Abstraction has 4560 states and 7175 transitions. [2022-11-23 15:36:48,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 15:36:48,503 INFO L276 IsEmpty]: Start isEmpty. Operand 4560 states and 7175 transitions. [2022-11-23 15:36:48,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-23 15:36:48,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:36:48,509 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:36:48,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-23 15:36:48,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 15:36:48,717 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:36:48,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:36:48,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1183091202, now seen corresponding path program 1 times [2022-11-23 15:36:48,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:36:48,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856816874] [2022-11-23 15:36:48,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:36:48,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:36:48,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:36:49,363 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-23 15:36:49,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:36:49,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856816874] [2022-11-23 15:36:49,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856816874] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:36:49,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668953776] [2022-11-23 15:36:49,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:36:49,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:36:49,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:36:49,365 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:36:49,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 15:36:49,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:36:49,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 1642 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 15:36:49,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:36:50,132 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 15:36:50,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:36:50,474 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-23 15:36:50,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668953776] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 15:36:50,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:36:50,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 20 [2022-11-23 15:36:50,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951922629] [2022-11-23 15:36:50,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:36:50,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 15:36:50,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:36:50,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 15:36:50,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-11-23 15:36:50,477 INFO L87 Difference]: Start difference. First operand 4560 states and 7175 transitions. Second operand has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-23 15:36:55,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:36:55,231 INFO L93 Difference]: Finished difference Result 12536 states and 21072 transitions. [2022-11-23 15:36:55,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-23 15:36:55,232 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) Word has length 103 [2022-11-23 15:36:55,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:36:55,328 INFO L225 Difference]: With dead ends: 12536 [2022-11-23 15:36:55,328 INFO L226 Difference]: Without dead ends: 9255 [2022-11-23 15:36:55,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2022-11-23 15:36:55,365 INFO L413 NwaCegarLoop]: 710 mSDtfsCounter, 2515 mSDsluCounter, 2608 mSDsCounter, 0 mSdLazyCounter, 3114 mSolverCounterSat, 1136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2609 SdHoareTripleChecker+Valid, 3318 SdHoareTripleChecker+Invalid, 4250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1136 IncrementalHoareTripleChecker+Valid, 3114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:36:55,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2609 Valid, 3318 Invalid, 4250 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1136 Valid, 3114 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-23 15:36:55,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9255 states. [2022-11-23 15:36:56,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9255 to 8039. [2022-11-23 15:36:56,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8039 states, 5642 states have (on average 1.467741935483871) internal successors, (8281), 5926 states have internal predecessors, (8281), 1831 states have call successors, (1831), 524 states have call predecessors, (1831), 565 states have return successors, (2845), 1732 states have call predecessors, (2845), 1823 states have call successors, (2845) [2022-11-23 15:36:56,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8039 states to 8039 states and 12957 transitions. [2022-11-23 15:36:56,345 INFO L78 Accepts]: Start accepts. Automaton has 8039 states and 12957 transitions. Word has length 103 [2022-11-23 15:36:56,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:36:56,347 INFO L495 AbstractCegarLoop]: Abstraction has 8039 states and 12957 transitions. [2022-11-23 15:36:56,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-23 15:36:56,347 INFO L276 IsEmpty]: Start isEmpty. Operand 8039 states and 12957 transitions. [2022-11-23 15:36:56,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-23 15:36:56,352 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:36:56,352 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:36:56,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-23 15:36:56,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:36:56,560 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:36:56,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:36:56,561 INFO L85 PathProgramCache]: Analyzing trace with hash 2064717840, now seen corresponding path program 1 times [2022-11-23 15:36:56,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:36:56,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740178694] [2022-11-23 15:36:56,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:36:56,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:36:56,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:36:57,207 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-23 15:36:57,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:36:57,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740178694] [2022-11-23 15:36:57,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740178694] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:36:57,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212028218] [2022-11-23 15:36:57,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:36:57,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:36:57,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:36:57,211 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:36:57,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 15:36:57,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:36:57,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 1659 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 15:36:57,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:36:57,761 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 15:36:57,761 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:36:57,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212028218] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:36:57,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:36:57,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-11-23 15:36:57,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156045932] [2022-11-23 15:36:57,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:36:57,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:36:57,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:36:57,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:36:57,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-23 15:36:57,766 INFO L87 Difference]: Start difference. First operand 8039 states and 12957 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) [2022-11-23 15:36:58,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:36:58,993 INFO L93 Difference]: Finished difference Result 14813 states and 23958 transitions. [2022-11-23 15:36:58,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:36:58,994 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) Word has length 107 [2022-11-23 15:36:58,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:36:59,052 INFO L225 Difference]: With dead ends: 14813 [2022-11-23 15:36:59,053 INFO L226 Difference]: Without dead ends: 8061 [2022-11-23 15:36:59,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-11-23 15:36:59,100 INFO L413 NwaCegarLoop]: 760 mSDtfsCounter, 448 mSDsluCounter, 1934 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 2694 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:36:59,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 2694 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 15:36:59,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8061 states. [2022-11-23 15:36:59,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8061 to 8039. [2022-11-23 15:36:59,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8039 states, 5642 states have (on average 1.467741935483871) internal successors, (8281), 5926 states have internal predecessors, (8281), 1831 states have call successors, (1831), 524 states have call predecessors, (1831), 565 states have return successors, (2837), 1732 states have call predecessors, (2837), 1823 states have call successors, (2837) [2022-11-23 15:36:59,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8039 states to 8039 states and 12949 transitions. [2022-11-23 15:36:59,923 INFO L78 Accepts]: Start accepts. Automaton has 8039 states and 12949 transitions. Word has length 107 [2022-11-23 15:36:59,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:36:59,924 INFO L495 AbstractCegarLoop]: Abstraction has 8039 states and 12949 transitions. [2022-11-23 15:36:59,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) [2022-11-23 15:36:59,925 INFO L276 IsEmpty]: Start isEmpty. Operand 8039 states and 12949 transitions. [2022-11-23 15:36:59,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-23 15:36:59,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:36:59,931 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:36:59,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 15:37:00,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:37:00,139 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:37:00,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:37:00,140 INFO L85 PathProgramCache]: Analyzing trace with hash 2060877659, now seen corresponding path program 1 times [2022-11-23 15:37:00,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:37:00,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492402969] [2022-11-23 15:37:00,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:37:00,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:37:00,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:37:00,867 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-23 15:37:00,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:37:00,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492402969] [2022-11-23 15:37:00,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492402969] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:37:00,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658750316] [2022-11-23 15:37:00,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:37:00,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:37:00,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:37:00,870 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:37:00,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 15:37:01,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:37:01,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 1755 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-23 15:37:01,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:37:01,529 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-23 15:37:01,529 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:37:01,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658750316] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:37:01,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:37:01,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 11 [2022-11-23 15:37:01,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833318267] [2022-11-23 15:37:01,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:37:01,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:37:01,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:37:01,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:37:01,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:37:01,533 INFO L87 Difference]: Start difference. First operand 8039 states and 12949 transitions. Second operand has 6 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-23 15:37:04,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:37:04,251 INFO L93 Difference]: Finished difference Result 27069 states and 47241 transitions. [2022-11-23 15:37:04,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:37:04,252 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 134 [2022-11-23 15:37:04,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:37:04,404 INFO L225 Difference]: With dead ends: 27069 [2022-11-23 15:37:04,405 INFO L226 Difference]: Without dead ends: 19042 [2022-11-23 15:37:04,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-23 15:37:04,485 INFO L413 NwaCegarLoop]: 1027 mSDtfsCounter, 819 mSDsluCounter, 3420 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 4447 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:37:04,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [888 Valid, 4447 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-23 15:37:04,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19042 states. [2022-11-23 15:37:06,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19042 to 15950. [2022-11-23 15:37:06,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15950 states, 11230 states have (on average 1.4647373107747106) internal successors, (16449), 11810 states have internal predecessors, (16449), 3637 states have call successors, (3637), 997 states have call predecessors, (3637), 1082 states have return successors, (6801), 3388 states have call predecessors, (6801), 3625 states have call successors, (6801) [2022-11-23 15:37:06,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15950 states to 15950 states and 26887 transitions. [2022-11-23 15:37:06,351 INFO L78 Accepts]: Start accepts. Automaton has 15950 states and 26887 transitions. Word has length 134 [2022-11-23 15:37:06,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:37:06,351 INFO L495 AbstractCegarLoop]: Abstraction has 15950 states and 26887 transitions. [2022-11-23 15:37:06,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-23 15:37:06,352 INFO L276 IsEmpty]: Start isEmpty. Operand 15950 states and 26887 transitions. [2022-11-23 15:37:06,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-23 15:37:06,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:37:06,358 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:37:06,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 15:37:06,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:37:06,572 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:37:06,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:37:06,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1772479653, now seen corresponding path program 1 times [2022-11-23 15:37:06,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:37:06,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021331616] [2022-11-23 15:37:06,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:37:06,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:37:06,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:37:07,703 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-23 15:37:07,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:37:07,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021331616] [2022-11-23 15:37:07,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021331616] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:37:07,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:37:07,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-23 15:37:07,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789171978] [2022-11-23 15:37:07,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:37:07,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 15:37:07,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:37:07,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 15:37:07,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-23 15:37:07,706 INFO L87 Difference]: Start difference. First operand 15950 states and 26887 transitions. Second operand has 14 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 7 states have call predecessors, (24), 5 states have call successors, (24) [2022-11-23 15:37:18,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:37:18,773 INFO L93 Difference]: Finished difference Result 60500 states and 109628 transitions. [2022-11-23 15:37:18,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-23 15:37:18,773 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 7 states have call predecessors, (24), 5 states have call successors, (24) Word has length 140 [2022-11-23 15:37:18,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:37:19,344 INFO L225 Difference]: With dead ends: 60500 [2022-11-23 15:37:19,344 INFO L226 Difference]: Without dead ends: 44562 [2022-11-23 15:37:19,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=309, Invalid=1761, Unknown=0, NotChecked=0, Total=2070 [2022-11-23 15:37:19,458 INFO L413 NwaCegarLoop]: 535 mSDtfsCounter, 2885 mSDsluCounter, 4390 mSDsCounter, 0 mSdLazyCounter, 9919 mSolverCounterSat, 1263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2996 SdHoareTripleChecker+Valid, 4925 SdHoareTripleChecker+Invalid, 11182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1263 IncrementalHoareTripleChecker+Valid, 9919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:37:19,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2996 Valid, 4925 Invalid, 11182 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1263 Valid, 9919 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2022-11-23 15:37:19,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44562 states. [2022-11-23 15:37:23,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44562 to 39067. [2022-11-23 15:37:23,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39067 states, 28420 states have (on average 1.4686488388458832) internal successors, (41739), 29348 states have internal predecessors, (41739), 7556 states have call successors, (7556), 2813 states have call predecessors, (7556), 3090 states have return successors, (18377), 7331 states have call predecessors, (18377), 7536 states have call successors, (18377) [2022-11-23 15:37:24,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39067 states to 39067 states and 67672 transitions. [2022-11-23 15:37:24,122 INFO L78 Accepts]: Start accepts. Automaton has 39067 states and 67672 transitions. Word has length 140 [2022-11-23 15:37:24,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:37:24,125 INFO L495 AbstractCegarLoop]: Abstraction has 39067 states and 67672 transitions. [2022-11-23 15:37:24,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 7 states have call predecessors, (24), 5 states have call successors, (24) [2022-11-23 15:37:24,126 INFO L276 IsEmpty]: Start isEmpty. Operand 39067 states and 67672 transitions. [2022-11-23 15:37:24,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-23 15:37:24,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:37:24,143 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:37:24,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 15:37:24,143 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:37:24,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:37:24,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1926193284, now seen corresponding path program 1 times [2022-11-23 15:37:24,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:37:24,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115763062] [2022-11-23 15:37:24,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:37:24,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:37:24,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:37:24,311 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-23 15:37:24,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:37:24,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115763062] [2022-11-23 15:37:24,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115763062] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:37:24,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:37:24,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:37:24,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468771739] [2022-11-23 15:37:24,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:37:24,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:37:24,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:37:24,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:37:24,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:37:24,314 INFO L87 Difference]: Start difference. First operand 39067 states and 67672 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-23 15:37:29,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:37:29,767 INFO L93 Difference]: Finished difference Result 91217 states and 159810 transitions. [2022-11-23 15:37:29,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:37:29,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 173 [2022-11-23 15:37:29,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:37:30,375 INFO L225 Difference]: With dead ends: 91217 [2022-11-23 15:37:30,376 INFO L226 Difference]: Without dead ends: 52162 [2022-11-23 15:37:30,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:37:30,740 INFO L413 NwaCegarLoop]: 831 mSDtfsCounter, 551 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 1434 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:37:30,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [551 Valid, 1434 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:37:30,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52162 states. [2022-11-23 15:37:35,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52162 to 51793. [2022-11-23 15:37:35,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51793 states, 37713 states have (on average 1.4690690212923925) internal successors, (55403), 38959 states have internal predecessors, (55403), 9970 states have call successors, (9970), 3722 states have call predecessors, (9970), 4109 states have return successors, (24445), 9681 states have call predecessors, (24445), 9950 states have call successors, (24445) [2022-11-23 15:37:35,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51793 states to 51793 states and 89818 transitions. [2022-11-23 15:37:35,997 INFO L78 Accepts]: Start accepts. Automaton has 51793 states and 89818 transitions. Word has length 173 [2022-11-23 15:37:35,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:37:36,000 INFO L495 AbstractCegarLoop]: Abstraction has 51793 states and 89818 transitions. [2022-11-23 15:37:36,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-23 15:37:36,000 INFO L276 IsEmpty]: Start isEmpty. Operand 51793 states and 89818 transitions. [2022-11-23 15:37:36,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-11-23 15:37:36,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:37:36,018 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:37:36,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 15:37:36,019 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:37:36,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:37:36,019 INFO L85 PathProgramCache]: Analyzing trace with hash -2016593011, now seen corresponding path program 1 times [2022-11-23 15:37:36,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:37:36,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498635748] [2022-11-23 15:37:36,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:37:36,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:37:36,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:37:36,403 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-11-23 15:37:36,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:37:36,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498635748] [2022-11-23 15:37:36,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498635748] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:37:36,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274016084] [2022-11-23 15:37:36,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:37:36,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:37:36,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:37:36,407 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:37:36,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9f469c-a13e-4af9-9fb8-461e36384964/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 15:37:36,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:37:36,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 2072 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 15:37:36,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:37:36,930 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 15:37:36,931 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:37:36,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274016084] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:37:36,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:37:36,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 9 [2022-11-23 15:37:36,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145035100] [2022-11-23 15:37:36,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:37:36,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 15:37:36,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:37:36,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 15:37:36,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:37:36,934 INFO L87 Difference]: Start difference. First operand 51793 states and 89818 transitions. Second operand has 9 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 3 states have call successors, (34), 3 states have call predecessors, (34), 5 states have return successors, (32), 5 states have call predecessors, (32), 3 states have call successors, (32) [2022-11-23 15:37:45,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:37:45,624 INFO L93 Difference]: Finished difference Result 137899 states and 242135 transitions. [2022-11-23 15:37:45,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 15:37:45,625 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 3 states have call successors, (34), 3 states have call predecessors, (34), 5 states have return successors, (32), 5 states have call predecessors, (32), 3 states have call successors, (32) Word has length 178 [2022-11-23 15:37:45,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted.