./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label44+token_ring.09.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label44+token_ring.09.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh --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 eebca77f45674e9c747126627d8fffbab7911c70d4e1d781272ecaec26772b5e --- 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-2329fc7 [2022-12-14 05:11:15,414 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 05:11:15,415 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 05:11:15,428 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 05:11:15,428 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 05:11:15,429 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 05:11:15,430 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 05:11:15,431 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 05:11:15,432 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 05:11:15,432 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 05:11:15,433 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 05:11:15,433 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 05:11:15,434 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 05:11:15,434 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 05:11:15,435 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 05:11:15,436 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 05:11:15,436 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 05:11:15,437 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 05:11:15,438 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 05:11:15,439 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 05:11:15,440 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 05:11:15,441 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 05:11:15,443 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 05:11:15,444 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 05:11:15,452 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 05:11:15,452 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 05:11:15,452 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 05:11:15,453 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 05:11:15,453 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 05:11:15,454 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 05:11:15,454 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 05:11:15,455 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 05:11:15,455 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 05:11:15,456 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 05:11:15,457 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 05:11:15,457 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 05:11:15,457 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 05:11:15,457 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 05:11:15,457 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 05:11:15,458 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 05:11:15,459 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 05:11:15,459 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 05:11:15,475 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 05:11:15,482 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 05:11:15,482 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 05:11:15,482 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 05:11:15,483 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 05:11:15,483 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 05:11:15,483 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 05:11:15,483 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 05:11:15,483 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 05:11:15,483 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 05:11:15,484 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 05:11:15,484 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 05:11:15,484 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 05:11:15,484 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 05:11:15,484 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 05:11:15,484 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 05:11:15,484 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 05:11:15,484 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 05:11:15,485 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 05:11:15,485 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 05:11:15,485 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 05:11:15,485 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 05:11:15,485 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 05:11:15,485 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 05:11:15,485 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 05:11:15,485 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 05:11:15,485 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 05:11:15,485 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 05:11:15,486 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 05:11:15,486 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 05:11:15,486 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 05:11:15,486 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 05:11:15,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:11:15,486 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 05:11:15,486 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 05:11:15,486 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 05:11:15,486 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 05:11:15,486 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 05:11:15,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 05:11:15,487 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 05:11:15,487 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 05:11:15,487 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_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eebca77f45674e9c747126627d8fffbab7911c70d4e1d781272ecaec26772b5e [2022-12-14 05:11:15,653 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 05:11:15,670 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 05:11:15,672 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 05:11:15,673 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 05:11:15,674 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 05:11:15,674 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/Problem05_label44+token_ring.09.cil-1.c [2022-12-14 05:11:18,325 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 05:11:18,710 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 05:11:18,711 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/sv-benchmarks/c/combinations/Problem05_label44+token_ring.09.cil-1.c [2022-12-14 05:11:18,742 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/data/3d36a7cfc/3cbbde75fe7b417f94bd46af8f388865/FLAGb689686a4 [2022-12-14 05:11:18,757 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/data/3d36a7cfc/3cbbde75fe7b417f94bd46af8f388865 [2022-12-14 05:11:18,759 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 05:11:18,761 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 05:11:18,762 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 05:11:18,763 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 05:11:18,766 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 05:11:18,767 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:11:18" (1/1) ... [2022-12-14 05:11:18,768 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54e47bc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:11:18, skipping insertion in model container [2022-12-14 05:11:18,768 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:11:18" (1/1) ... [2022-12-14 05:11:18,774 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 05:11:18,955 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 05:11:20,300 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_8936f1bb-8a62-4b51-b5ea-e230ce23329f/sv-benchmarks/c/combinations/Problem05_label44+token_ring.09.cil-1.c[377340,377353] [2022-12-14 05:11:20,325 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_8936f1bb-8a62-4b51-b5ea-e230ce23329f/sv-benchmarks/c/combinations/Problem05_label44+token_ring.09.cil-1.c[383339,383352] [2022-12-14 05:11:20,547 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:11:20,556 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 05:11:21,379 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_8936f1bb-8a62-4b51-b5ea-e230ce23329f/sv-benchmarks/c/combinations/Problem05_label44+token_ring.09.cil-1.c[377340,377353] [2022-12-14 05:11:21,385 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_8936f1bb-8a62-4b51-b5ea-e230ce23329f/sv-benchmarks/c/combinations/Problem05_label44+token_ring.09.cil-1.c[383339,383352] [2022-12-14 05:11:21,397 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:11:21,432 INFO L208 MainTranslator]: Completed translation [2022-12-14 05:11:21,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:11:21 WrapperNode [2022-12-14 05:11:21,432 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 05:11:21,433 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 05:11:21,433 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 05:11:21,433 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 05:11:21,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:11:21" (1/1) ... [2022-12-14 05:11:21,503 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:11:21" (1/1) ... [2022-12-14 05:11:21,780 INFO L138 Inliner]: procedures = 62, calls = 68, calls flagged for inlining = 40, calls inlined = 40, statements flattened = 13025 [2022-12-14 05:11:21,780 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 05:11:21,781 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 05:11:21,781 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 05:11:21,781 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 05:11:21,789 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:11:21" (1/1) ... [2022-12-14 05:11:21,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:11:21" (1/1) ... [2022-12-14 05:11:21,823 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:11:21" (1/1) ... [2022-12-14 05:11:21,824 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:11:21" (1/1) ... [2022-12-14 05:11:21,942 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:11:21" (1/1) ... [2022-12-14 05:11:21,999 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:11:21" (1/1) ... [2022-12-14 05:11:22,012 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:11:21" (1/1) ... [2022-12-14 05:11:22,023 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:11:21" (1/1) ... [2022-12-14 05:11:22,057 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 05:11:22,058 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 05:11:22,058 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 05:11:22,058 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 05:11:22,058 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:11:21" (1/1) ... [2022-12-14 05:11:22,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:11:22,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:11:22,083 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 05:11:22,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 05:11:22,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 05:11:22,118 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 05:11:22,118 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 05:11:22,118 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 05:11:22,118 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 05:11:22,119 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 05:11:22,119 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 05:11:22,119 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 05:11:22,119 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 05:11:22,119 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 05:11:22,119 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 05:11:22,119 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 05:11:22,119 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 05:11:22,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 05:11:22,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 05:11:22,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 05:11:22,227 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 05:11:22,229 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 05:11:28,307 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 05:11:29,846 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 05:11:29,846 INFO L300 CfgBuilder]: Removed 13 assume(true) statements. [2022-12-14 05:11:29,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:11:29 BoogieIcfgContainer [2022-12-14 05:11:29,850 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 05:11:29,852 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 05:11:29,852 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 05:11:29,854 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 05:11:29,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:11:18" (1/3) ... [2022-12-14 05:11:29,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21cc4de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:11:29, skipping insertion in model container [2022-12-14 05:11:29,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:11:21" (2/3) ... [2022-12-14 05:11:29,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21cc4de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:11:29, skipping insertion in model container [2022-12-14 05:11:29,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:11:29" (3/3) ... [2022-12-14 05:11:29,856 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label44+token_ring.09.cil-1.c [2022-12-14 05:11:29,871 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 05:11:29,871 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 05:11:29,943 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 05:11:29,948 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;@4ad94495, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 05:11:29,948 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 05:11:29,957 INFO L276 IsEmpty]: Start isEmpty. Operand has 1798 states, 1766 states have (on average 1.962061155152888) internal successors, (3465), 1769 states have internal predecessors, (3465), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-12-14 05:11:29,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 05:11:29,966 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:11:29,967 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:11:29,967 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:11:29,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:11:29,971 INFO L85 PathProgramCache]: Analyzing trace with hash -492825936, now seen corresponding path program 1 times [2022-12-14 05:11:29,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:11:29,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931945502] [2022-12-14 05:11:29,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:29,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:11:30,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:30,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:11:30,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:11:30,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931945502] [2022-12-14 05:11:30,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931945502] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:11:30,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:11:30,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:11:30,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385149935] [2022-12-14 05:11:30,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:11:30,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:11:30,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:11:30,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:11:30,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:11:30,402 INFO L87 Difference]: Start difference. First operand has 1798 states, 1766 states have (on average 1.962061155152888) internal successors, (3465), 1769 states have internal predecessors, (3465), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 05:11:31,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:11:31,164 INFO L93 Difference]: Finished difference Result 3734 states and 7259 transitions. [2022-12-14 05:11:31,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:11:31,166 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 58 [2022-12-14 05:11:31,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:11:31,181 INFO L225 Difference]: With dead ends: 3734 [2022-12-14 05:11:31,182 INFO L226 Difference]: Without dead ends: 1935 [2022-12-14 05:11:31,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:11:31,191 INFO L413 NwaCegarLoop]: 3421 mSDtfsCounter, 3680 mSDsluCounter, 3335 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3680 SdHoareTripleChecker+Valid, 6756 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 05:11:31,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3680 Valid, 6756 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 05:11:31,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1935 states. [2022-12-14 05:11:31,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1935 to 1934. [2022-12-14 05:11:31,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1934 states, 1878 states have (on average 1.9297124600638977) internal successors, (3624), 1881 states have internal predecessors, (3624), 42 states have call successors, (42), 12 states have call predecessors, (42), 12 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2022-12-14 05:11:31,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1934 states to 1934 states and 3708 transitions. [2022-12-14 05:11:31,286 INFO L78 Accepts]: Start accepts. Automaton has 1934 states and 3708 transitions. Word has length 58 [2022-12-14 05:11:31,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:11:31,287 INFO L495 AbstractCegarLoop]: Abstraction has 1934 states and 3708 transitions. [2022-12-14 05:11:31,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 05:11:31,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1934 states and 3708 transitions. [2022-12-14 05:11:31,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 05:11:31,291 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:11:31,292 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:11:31,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 05:11:31,292 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:11:31,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:11:31,293 INFO L85 PathProgramCache]: Analyzing trace with hash -257216285, now seen corresponding path program 1 times [2022-12-14 05:11:31,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:11:31,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588404661] [2022-12-14 05:11:31,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:31,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:11:31,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:31,560 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 05:11:31,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:11:31,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588404661] [2022-12-14 05:11:31,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588404661] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:11:31,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892716832] [2022-12-14 05:11:31,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:31,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:31,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:11:31,563 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:11:31,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 05:11:31,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:31,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 05:11:31,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:11:31,802 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 05:11:31,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:11:31,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892716832] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:11:31,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:11:31,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 05:11:31,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163767433] [2022-12-14 05:11:31,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:11:31,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:11:31,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:11:31,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:11:31,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:11:31,805 INFO L87 Difference]: Start difference. First operand 1934 states and 3708 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 05:11:32,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:11:32,255 INFO L93 Difference]: Finished difference Result 2503 states and 4585 transitions. [2022-12-14 05:11:32,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:11:32,256 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 115 [2022-12-14 05:11:32,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:11:32,265 INFO L225 Difference]: With dead ends: 2503 [2022-12-14 05:11:32,265 INFO L226 Difference]: Without dead ends: 2215 [2022-12-14 05:11:32,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:11:32,268 INFO L413 NwaCegarLoop]: 3292 mSDtfsCounter, 3453 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3453 SdHoareTripleChecker+Valid, 3472 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:11:32,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3453 Valid, 3472 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 05:11:32,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2022-12-14 05:11:32,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 2211. [2022-12-14 05:11:32,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2211 states, 2107 states have (on average 1.8818224964404366) internal successors, (3965), 2111 states have internal predecessors, (3965), 78 states have call successors, (78), 24 states have call predecessors, (78), 24 states have return successors, (78), 76 states have call predecessors, (78), 78 states have call successors, (78) [2022-12-14 05:11:32,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2211 states to 2211 states and 4121 transitions. [2022-12-14 05:11:32,322 INFO L78 Accepts]: Start accepts. Automaton has 2211 states and 4121 transitions. Word has length 115 [2022-12-14 05:11:32,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:11:32,323 INFO L495 AbstractCegarLoop]: Abstraction has 2211 states and 4121 transitions. [2022-12-14 05:11:32,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 05:11:32,323 INFO L276 IsEmpty]: Start isEmpty. Operand 2211 states and 4121 transitions. [2022-12-14 05:11:32,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 05:11:32,326 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:11:32,327 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:11:32,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 05:11:32,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-14 05:11:32,528 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:11:32,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:11:32,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1223762533, now seen corresponding path program 1 times [2022-12-14 05:11:32,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:11:32,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526891458] [2022-12-14 05:11:32,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:32,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:11:32,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:32,663 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 05:11:32,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:11:32,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526891458] [2022-12-14 05:11:32,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526891458] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:11:32,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151288903] [2022-12-14 05:11:32,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:32,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:32,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:11:32,665 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:11:32,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 05:11:32,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:32,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 05:11:32,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:11:32,867 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 05:11:32,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:11:32,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151288903] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:11:32,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:11:32,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 05:11:32,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640267199] [2022-12-14 05:11:32,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:11:32,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:11:32,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:11:32,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:11:32,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:11:32,869 INFO L87 Difference]: Start difference. First operand 2211 states and 4121 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 05:11:33,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:11:33,285 INFO L93 Difference]: Finished difference Result 3328 states and 5836 transitions. [2022-12-14 05:11:33,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:11:33,285 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 115 [2022-12-14 05:11:33,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:11:33,294 INFO L225 Difference]: With dead ends: 3328 [2022-12-14 05:11:33,294 INFO L226 Difference]: Without dead ends: 2763 [2022-12-14 05:11:33,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:11:33,298 INFO L413 NwaCegarLoop]: 3291 mSDtfsCounter, 3465 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3465 SdHoareTripleChecker+Valid, 3471 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:11:33,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3465 Valid, 3471 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:11:33,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2763 states. [2022-12-14 05:11:33,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2763 to 2757. [2022-12-14 05:11:33,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2757 states, 2559 states have (on average 1.8112543962485346) internal successors, (4635), 2565 states have internal predecessors, (4635), 148 states have call successors, (148), 48 states have call predecessors, (148), 48 states have return successors, (148), 144 states have call predecessors, (148), 148 states have call successors, (148) [2022-12-14 05:11:33,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2757 states to 2757 states and 4931 transitions. [2022-12-14 05:11:33,363 INFO L78 Accepts]: Start accepts. Automaton has 2757 states and 4931 transitions. Word has length 115 [2022-12-14 05:11:33,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:11:33,364 INFO L495 AbstractCegarLoop]: Abstraction has 2757 states and 4931 transitions. [2022-12-14 05:11:33,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 05:11:33,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2757 states and 4931 transitions. [2022-12-14 05:11:33,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 05:11:33,366 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:11:33,367 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:11:33,373 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 05:11:33,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:33,567 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:11:33,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:11:33,568 INFO L85 PathProgramCache]: Analyzing trace with hash -648093465, now seen corresponding path program 1 times [2022-12-14 05:11:33,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:11:33,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604123804] [2022-12-14 05:11:33,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:33,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:11:33,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:33,661 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 05:11:33,661 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:11:33,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604123804] [2022-12-14 05:11:33,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604123804] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:11:33,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471944339] [2022-12-14 05:11:33,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:33,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:33,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:11:33,663 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:11:33,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 05:11:33,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:33,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 05:11:33,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:11:33,847 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 05:11:33,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:11:33,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471944339] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:11:33,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:11:33,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 05:11:33,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607603915] [2022-12-14 05:11:33,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:11:33,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:11:33,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:11:33,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:11:33,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:11:33,850 INFO L87 Difference]: Start difference. First operand 2757 states and 4931 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 05:11:34,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:11:34,223 INFO L93 Difference]: Finished difference Result 4954 states and 8288 transitions. [2022-12-14 05:11:34,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:11:34,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 115 [2022-12-14 05:11:34,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:11:34,236 INFO L225 Difference]: With dead ends: 4954 [2022-12-14 05:11:34,236 INFO L226 Difference]: Without dead ends: 3843 [2022-12-14 05:11:34,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:11:34,241 INFO L413 NwaCegarLoop]: 3290 mSDtfsCounter, 3474 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3474 SdHoareTripleChecker+Valid, 3470 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:11:34,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3474 Valid, 3470 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:11:34,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3843 states. [2022-12-14 05:11:34,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3843 to 3833. [2022-12-14 05:11:34,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3451 states have (on average 1.724427702115329) internal successors, (5951), 3461 states have internal predecessors, (5951), 284 states have call successors, (284), 96 states have call predecessors, (284), 96 states have return successors, (284), 276 states have call predecessors, (284), 284 states have call successors, (284) [2022-12-14 05:11:34,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 6519 transitions. [2022-12-14 05:11:34,371 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 6519 transitions. Word has length 115 [2022-12-14 05:11:34,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:11:34,371 INFO L495 AbstractCegarLoop]: Abstraction has 3833 states and 6519 transitions. [2022-12-14 05:11:34,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 05:11:34,371 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 6519 transitions. [2022-12-14 05:11:34,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 05:11:34,375 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:11:34,375 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:11:34,381 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 05:11:34,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:34,576 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:11:34,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:11:34,576 INFO L85 PathProgramCache]: Analyzing trace with hash 47338661, now seen corresponding path program 1 times [2022-12-14 05:11:34,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:11:34,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437069456] [2022-12-14 05:11:34,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:34,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:11:34,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:34,665 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 05:11:34,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:11:34,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437069456] [2022-12-14 05:11:34,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437069456] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:11:34,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216090952] [2022-12-14 05:11:34,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:34,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:34,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:11:34,667 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:11:34,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 05:11:34,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:34,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 822 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 05:11:34,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:11:34,841 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 05:11:34,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:11:34,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216090952] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:11:34,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:11:34,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 05:11:34,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488532547] [2022-12-14 05:11:34,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:11:34,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:11:34,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:11:34,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:11:34,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:11:34,844 INFO L87 Difference]: Start difference. First operand 3833 states and 6519 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 05:11:35,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:11:35,262 INFO L93 Difference]: Finished difference Result 8158 states and 13092 transitions. [2022-12-14 05:11:35,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:11:35,262 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 115 [2022-12-14 05:11:35,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:11:35,280 INFO L225 Difference]: With dead ends: 8158 [2022-12-14 05:11:35,280 INFO L226 Difference]: Without dead ends: 5971 [2022-12-14 05:11:35,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:11:35,288 INFO L413 NwaCegarLoop]: 3262 mSDtfsCounter, 3471 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3471 SdHoareTripleChecker+Valid, 3442 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:11:35,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3471 Valid, 3442 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:11:35,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5971 states. [2022-12-14 05:11:35,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5971 to 5953. [2022-12-14 05:11:35,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5953 states, 5211 states have (on average 1.637881404720783) internal successors, (8535), 5229 states have internal predecessors, (8535), 548 states have call successors, (548), 192 states have call predecessors, (548), 192 states have return successors, (548), 532 states have call predecessors, (548), 548 states have call successors, (548) [2022-12-14 05:11:35,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5953 states to 5953 states and 9631 transitions. [2022-12-14 05:11:35,423 INFO L78 Accepts]: Start accepts. Automaton has 5953 states and 9631 transitions. Word has length 115 [2022-12-14 05:11:35,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:11:35,423 INFO L495 AbstractCegarLoop]: Abstraction has 5953 states and 9631 transitions. [2022-12-14 05:11:35,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 05:11:35,424 INFO L276 IsEmpty]: Start isEmpty. Operand 5953 states and 9631 transitions. [2022-12-14 05:11:35,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 05:11:35,429 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:11:35,430 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:11:35,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 05:11:35,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:35,631 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:11:35,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:11:35,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1973179993, now seen corresponding path program 1 times [2022-12-14 05:11:35,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:11:35,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250571656] [2022-12-14 05:11:35,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:35,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:11:35,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:35,827 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 05:11:35,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:11:35,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250571656] [2022-12-14 05:11:35,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250571656] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:11:35,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624630878] [2022-12-14 05:11:35,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:35,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:35,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:11:35,828 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:11:35,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 05:11:35,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:35,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 05:11:35,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:11:36,015 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 05:11:36,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:11:36,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624630878] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:11:36,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:11:36,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 05:11:36,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800103059] [2022-12-14 05:11:36,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:11:36,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:11:36,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:11:36,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:11:36,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:11:36,018 INFO L87 Difference]: Start difference. First operand 5953 states and 9631 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 05:11:36,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:11:36,582 INFO L93 Difference]: Finished difference Result 14470 states and 22500 transitions. [2022-12-14 05:11:36,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:11:36,582 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 115 [2022-12-14 05:11:36,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:11:36,616 INFO L225 Difference]: With dead ends: 14470 [2022-12-14 05:11:36,616 INFO L226 Difference]: Without dead ends: 10163 [2022-12-14 05:11:36,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:11:36,629 INFO L413 NwaCegarLoop]: 3262 mSDtfsCounter, 3459 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3459 SdHoareTripleChecker+Valid, 3442 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:11:36,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3459 Valid, 3442 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:11:36,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10163 states. [2022-12-14 05:11:36,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10163 to 10129. [2022-12-14 05:11:36,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10129 states, 8683 states have (on average 1.5670851088333526) internal successors, (13607), 8717 states have internal predecessors, (13607), 1060 states have call successors, (1060), 384 states have call predecessors, (1060), 384 states have return successors, (1060), 1028 states have call predecessors, (1060), 1060 states have call successors, (1060) [2022-12-14 05:11:36,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10129 states to 10129 states and 15727 transitions. [2022-12-14 05:11:36,944 INFO L78 Accepts]: Start accepts. Automaton has 10129 states and 15727 transitions. Word has length 115 [2022-12-14 05:11:36,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:11:36,944 INFO L495 AbstractCegarLoop]: Abstraction has 10129 states and 15727 transitions. [2022-12-14 05:11:36,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 05:11:36,945 INFO L276 IsEmpty]: Start isEmpty. Operand 10129 states and 15727 transitions. [2022-12-14 05:11:36,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 05:11:36,956 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:11:36,956 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:11:36,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 05:11:37,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 05:11:37,157 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:11:37,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:11:37,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1973088681, now seen corresponding path program 1 times [2022-12-14 05:11:37,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:11:37,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106030673] [2022-12-14 05:11:37,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:37,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:11:37,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:37,265 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 05:11:37,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:11:37,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106030673] [2022-12-14 05:11:37,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106030673] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:11:37,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:11:37,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:11:37,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3117415] [2022-12-14 05:11:37,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:11:37,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:11:37,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:11:37,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:11:37,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:11:37,268 INFO L87 Difference]: Start difference. First operand 10129 states and 15727 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 05:11:37,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:11:37,871 INFO L93 Difference]: Finished difference Result 16723 states and 25776 transitions. [2022-12-14 05:11:37,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:11:37,871 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 115 [2022-12-14 05:11:37,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:11:37,904 INFO L225 Difference]: With dead ends: 16723 [2022-12-14 05:11:37,905 INFO L226 Difference]: Without dead ends: 12401 [2022-12-14 05:11:37,912 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 [2022-12-14 05:11:37,913 INFO L413 NwaCegarLoop]: 3348 mSDtfsCounter, 100 mSDsluCounter, 3254 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 6602 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:11:37,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 6602 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:11:37,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12401 states. [2022-12-14 05:11:38,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12401 to 11713. [2022-12-14 05:11:38,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11713 states, 10203 states have (on average 1.5908066255023032) internal successors, (16231), 10237 states have internal predecessors, (16231), 1092 states have call successors, (1092), 416 states have call predecessors, (1092), 416 states have return successors, (1092), 1060 states have call predecessors, (1092), 1092 states have call successors, (1092) [2022-12-14 05:11:38,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11713 states to 11713 states and 18415 transitions. [2022-12-14 05:11:38,212 INFO L78 Accepts]: Start accepts. Automaton has 11713 states and 18415 transitions. Word has length 115 [2022-12-14 05:11:38,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:11:38,212 INFO L495 AbstractCegarLoop]: Abstraction has 11713 states and 18415 transitions. [2022-12-14 05:11:38,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 05:11:38,213 INFO L276 IsEmpty]: Start isEmpty. Operand 11713 states and 18415 transitions. [2022-12-14 05:11:38,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 05:11:38,233 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:11:38,233 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 05:11:38,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 05:11:38,234 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:11:38,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:11:38,234 INFO L85 PathProgramCache]: Analyzing trace with hash 323712229, now seen corresponding path program 1 times [2022-12-14 05:11:38,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:11:38,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364135021] [2022-12-14 05:11:38,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:38,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:11:38,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:38,307 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 05:11:38,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:11:38,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364135021] [2022-12-14 05:11:38,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364135021] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:11:38,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:11:38,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:11:38,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30558702] [2022-12-14 05:11:38,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:11:38,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:11:38,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:11:38,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:11:38,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:11:38,309 INFO L87 Difference]: Start difference. First operand 11713 states and 18415 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 05:11:39,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:11:39,042 INFO L93 Difference]: Finished difference Result 31558 states and 48788 transitions. [2022-12-14 05:11:39,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:11:39,042 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 156 [2022-12-14 05:11:39,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:11:39,094 INFO L225 Difference]: With dead ends: 31558 [2022-12-14 05:11:39,095 INFO L226 Difference]: Without dead ends: 21491 [2022-12-14 05:11:39,116 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 [2022-12-14 05:11:39,117 INFO L413 NwaCegarLoop]: 3264 mSDtfsCounter, 3461 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3461 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:11:39,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3461 Valid, 3444 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:11:39,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21491 states. [2022-12-14 05:11:39,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21491 to 21393. [2022-12-14 05:11:39,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21393 states, 18443 states have (on average 1.5480670172965352) internal successors, (28551), 18509 states have internal predecessors, (28551), 2116 states have call successors, (2116), 832 states have call predecessors, (2116), 832 states have return successors, (2116), 2052 states have call predecessors, (2116), 2116 states have call successors, (2116) [2022-12-14 05:11:39,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21393 states to 21393 states and 32783 transitions. [2022-12-14 05:11:39,728 INFO L78 Accepts]: Start accepts. Automaton has 21393 states and 32783 transitions. Word has length 156 [2022-12-14 05:11:39,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:11:39,728 INFO L495 AbstractCegarLoop]: Abstraction has 21393 states and 32783 transitions. [2022-12-14 05:11:39,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 05:11:39,729 INFO L276 IsEmpty]: Start isEmpty. Operand 21393 states and 32783 transitions. [2022-12-14 05:11:39,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 05:11:39,763 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:11:39,763 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 05:11:39,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 05:11:39,763 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:11:39,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:11:39,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1449941574, now seen corresponding path program 1 times [2022-12-14 05:11:39,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:11:39,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051862102] [2022-12-14 05:11:39,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:39,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:11:39,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:39,826 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 05:11:39,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:11:39,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051862102] [2022-12-14 05:11:39,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051862102] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:11:39,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:11:39,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:11:39,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918702230] [2022-12-14 05:11:39,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:11:39,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:11:39,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:11:39,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:11:39,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:11:39,828 INFO L87 Difference]: Start difference. First operand 21393 states and 32783 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 05:11:41,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:11:41,140 INFO L93 Difference]: Finished difference Result 60310 states and 91924 transitions. [2022-12-14 05:11:41,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:11:41,140 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 156 [2022-12-14 05:11:41,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:11:41,236 INFO L225 Difference]: With dead ends: 60310 [2022-12-14 05:11:41,236 INFO L226 Difference]: Without dead ends: 40563 [2022-12-14 05:11:41,281 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 [2022-12-14 05:11:41,282 INFO L413 NwaCegarLoop]: 3264 mSDtfsCounter, 3463 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3463 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:11:41,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3463 Valid, 3444 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:11:41,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40563 states. [2022-12-14 05:11:42,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40563 to 40369. [2022-12-14 05:11:42,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40369 states, 34603 states have (on average 1.5186833511545241) internal successors, (52551), 34733 states have internal predecessors, (52551), 4100 states have call successors, (4100), 1664 states have call predecessors, (4100), 1664 states have return successors, (4100), 3972 states have call predecessors, (4100), 4100 states have call successors, (4100) [2022-12-14 05:11:42,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40369 states to 40369 states and 60751 transitions. [2022-12-14 05:11:42,426 INFO L78 Accepts]: Start accepts. Automaton has 40369 states and 60751 transitions. Word has length 156 [2022-12-14 05:11:42,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:11:42,426 INFO L495 AbstractCegarLoop]: Abstraction has 40369 states and 60751 transitions. [2022-12-14 05:11:42,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 05:11:42,426 INFO L276 IsEmpty]: Start isEmpty. Operand 40369 states and 60751 transitions. [2022-12-14 05:11:42,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 05:11:42,481 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:11:42,481 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 05:11:42,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 05:11:42,482 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:11:42,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:11:42,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1222972631, now seen corresponding path program 1 times [2022-12-14 05:11:42,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:11:42,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387056839] [2022-12-14 05:11:42,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:42,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:11:42,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:42,551 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 05:11:42,551 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:11:42,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387056839] [2022-12-14 05:11:42,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387056839] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:11:42,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:11:42,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:11:42,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766545481] [2022-12-14 05:11:42,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:11:42,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:11:42,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:11:42,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:11:42,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:11:42,553 INFO L87 Difference]: Start difference. First operand 40369 states and 60751 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 05:11:44,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:11:44,909 INFO L93 Difference]: Finished difference Result 116662 states and 175828 transitions. [2022-12-14 05:11:44,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:11:44,910 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 156 [2022-12-14 05:11:44,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:11:45,113 INFO L225 Difference]: With dead ends: 116662 [2022-12-14 05:11:45,114 INFO L226 Difference]: Without dead ends: 77939 [2022-12-14 05:11:45,196 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 [2022-12-14 05:11:45,196 INFO L413 NwaCegarLoop]: 3264 mSDtfsCounter, 3465 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3465 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:11:45,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3465 Valid, 3444 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:11:45,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77939 states. [2022-12-14 05:11:47,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77939 to 77553. [2022-12-14 05:11:47,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77553 states, 66283 states have (on average 1.4976841724122325) internal successors, (99271), 66541 states have internal predecessors, (99271), 7940 states have call successors, (7940), 3328 states have call predecessors, (7940), 3328 states have return successors, (7940), 7684 states have call predecessors, (7940), 7940 states have call successors, (7940) [2022-12-14 05:11:47,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77553 states to 77553 states and 115151 transitions. [2022-12-14 05:11:47,490 INFO L78 Accepts]: Start accepts. Automaton has 77553 states and 115151 transitions. Word has length 156 [2022-12-14 05:11:47,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:11:47,491 INFO L495 AbstractCegarLoop]: Abstraction has 77553 states and 115151 transitions. [2022-12-14 05:11:47,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 05:11:47,491 INFO L276 IsEmpty]: Start isEmpty. Operand 77553 states and 115151 transitions. [2022-12-14 05:11:47,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 05:11:47,634 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:11:47,634 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 05:11:47,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 05:11:47,635 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:11:47,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:11:47,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1467228685, now seen corresponding path program 1 times [2022-12-14 05:11:47,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:11:47,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861991905] [2022-12-14 05:11:47,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:47,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:11:47,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:47,691 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 05:11:47,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:11:47,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861991905] [2022-12-14 05:11:47,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861991905] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:11:47,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:11:47,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:11:47,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641482355] [2022-12-14 05:11:47,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:11:47,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:11:47,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:11:47,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:11:47,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:11:47,693 INFO L87 Difference]: Start difference. First operand 77553 states and 115151 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 05:11:51,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:11:51,947 INFO L93 Difference]: Finished difference Result 227062 states and 338900 transitions. [2022-12-14 05:11:51,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:11:51,948 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 156 [2022-12-14 05:11:51,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:11:52,449 INFO L225 Difference]: With dead ends: 227062 [2022-12-14 05:11:52,449 INFO L226 Difference]: Without dead ends: 151155 [2022-12-14 05:11:52,624 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 [2022-12-14 05:11:52,624 INFO L413 NwaCegarLoop]: 3272 mSDtfsCounter, 3468 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3468 SdHoareTripleChecker+Valid, 3452 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:11:52,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3468 Valid, 3452 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:11:52,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151155 states. [2022-12-14 05:11:57,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151155 to 150385. [2022-12-14 05:11:57,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150385 states, 128363 states have (on average 1.4813536611017193) internal successors, (190151), 128877 states have internal predecessors, (190151), 15364 states have call successors, (15364), 6656 states have call predecessors, (15364), 6656 states have return successors, (15364), 14852 states have call predecessors, (15364), 15364 states have call successors, (15364) [2022-12-14 05:11:57,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150385 states to 150385 states and 220879 transitions. [2022-12-14 05:11:57,708 INFO L78 Accepts]: Start accepts. Automaton has 150385 states and 220879 transitions. Word has length 156 [2022-12-14 05:11:57,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:11:57,708 INFO L495 AbstractCegarLoop]: Abstraction has 150385 states and 220879 transitions. [2022-12-14 05:11:57,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 05:11:57,709 INFO L276 IsEmpty]: Start isEmpty. Operand 150385 states and 220879 transitions. [2022-12-14 05:11:57,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-12-14 05:11:57,985 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:11:57,985 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 05:11:57,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 05:11:57,985 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:11:57,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:11:57,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1916809682, now seen corresponding path program 1 times [2022-12-14 05:11:57,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:11:57,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626790652] [2022-12-14 05:11:57,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:57,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:11:58,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:58,361 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 15 proven. 63 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-12-14 05:11:58,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:11:58,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626790652] [2022-12-14 05:11:58,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626790652] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:11:58,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960004468] [2022-12-14 05:11:58,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:58,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:58,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:11:58,362 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:11:58,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 05:11:58,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:58,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 05:11:58,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:11:58,567 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 05:11:58,567 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:11:58,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960004468] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:11:58,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:11:58,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 05:11:58,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689428206] [2022-12-14 05:11:58,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:11:58,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:11:58,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:11:58,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:11:58,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:11:58,569 INFO L87 Difference]: Start difference. First operand 150385 states and 220879 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 05:12:04,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:12:04,647 INFO L93 Difference]: Finished difference Result 286581 states and 424401 transitions. [2022-12-14 05:12:04,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:12:04,648 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 178 [2022-12-14 05:12:04,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:12:05,242 INFO L225 Difference]: With dead ends: 286581 [2022-12-14 05:12:05,242 INFO L226 Difference]: Without dead ends: 211059 [2022-12-14 05:12:05,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:12:05,378 INFO L413 NwaCegarLoop]: 3392 mSDtfsCounter, 152 mSDsluCounter, 3256 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 6648 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:12:05,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 6648 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 05:12:05,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211059 states. [2022-12-14 05:12:11,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211059 to 183153. [2022-12-14 05:12:11,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183153 states, 159595 states have (on average 1.523500109652558) internal successors, (243143), 160109 states have internal predecessors, (243143), 16132 states have call successors, (16132), 7424 states have call predecessors, (16132), 7424 states have return successors, (16132), 15620 states have call predecessors, (16132), 16132 states have call successors, (16132) [2022-12-14 05:12:12,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183153 states to 183153 states and 275407 transitions. [2022-12-14 05:12:12,181 INFO L78 Accepts]: Start accepts. Automaton has 183153 states and 275407 transitions. Word has length 178 [2022-12-14 05:12:12,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:12:12,181 INFO L495 AbstractCegarLoop]: Abstraction has 183153 states and 275407 transitions. [2022-12-14 05:12:12,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 05:12:12,182 INFO L276 IsEmpty]: Start isEmpty. Operand 183153 states and 275407 transitions. [2022-12-14 05:12:12,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-12-14 05:12:12,625 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:12:12,626 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 05:12:12,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 05:12:12,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:12:12,828 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:12:12,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:12:12,829 INFO L85 PathProgramCache]: Analyzing trace with hash 851876421, now seen corresponding path program 2 times [2022-12-14 05:12:12,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:12:12,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210443382] [2022-12-14 05:12:12,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:12:12,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:12:12,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:12:13,121 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 05:12:13,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:12:13,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210443382] [2022-12-14 05:12:13,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210443382] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:12:13,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020806062] [2022-12-14 05:12:13,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:12:13,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:12:13,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:12:13,123 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:12:13,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 05:12:13,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 05:12:13,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:12:13,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 05:12:13,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:12:13,278 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 05:12:13,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:12:13,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020806062] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:12:13,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:12:13,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 05:12:13,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175358842] [2022-12-14 05:12:13,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:12:13,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:12:13,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:12:13,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:12:13,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:12:13,280 INFO L87 Difference]: Start difference. First operand 183153 states and 275407 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 05:12:18,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:12:18,161 INFO L93 Difference]: Finished difference Result 276341 states and 420433 transitions. [2022-12-14 05:12:18,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:12:18,162 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 178 [2022-12-14 05:12:18,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:12:18,638 INFO L225 Difference]: With dead ends: 276341 [2022-12-14 05:12:18,638 INFO L226 Difference]: Without dead ends: 183667 [2022-12-14 05:12:18,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:12:18,807 INFO L413 NwaCegarLoop]: 3411 mSDtfsCounter, 200 mSDsluCounter, 3238 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 6649 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:12:18,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 6649 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:12:18,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183667 states. [2022-12-14 05:12:24,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183667 to 181873. [2022-12-14 05:12:24,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181873 states, 158315 states have (on average 1.5099453620945582) internal successors, (239047), 158829 states have internal predecessors, (239047), 16132 states have call successors, (16132), 7424 states have call predecessors, (16132), 7424 states have return successors, (16132), 15620 states have call predecessors, (16132), 16132 states have call successors, (16132) [2022-12-14 05:12:24,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181873 states to 181873 states and 271311 transitions. [2022-12-14 05:12:24,953 INFO L78 Accepts]: Start accepts. Automaton has 181873 states and 271311 transitions. Word has length 178 [2022-12-14 05:12:24,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:12:24,953 INFO L495 AbstractCegarLoop]: Abstraction has 181873 states and 271311 transitions. [2022-12-14 05:12:24,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 05:12:24,953 INFO L276 IsEmpty]: Start isEmpty. Operand 181873 states and 271311 transitions. [2022-12-14 05:12:25,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-12-14 05:12:25,255 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:12:25,256 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 05:12:25,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 05:12:25,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 05:12:25,457 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:12:25,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:12:25,459 INFO L85 PathProgramCache]: Analyzing trace with hash 2126979110, now seen corresponding path program 1 times [2022-12-14 05:12:25,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:12:25,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078313332] [2022-12-14 05:12:25,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:12:25,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:12:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:12:25,671 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 10 proven. 60 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 05:12:25,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:12:25,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078313332] [2022-12-14 05:12:25,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078313332] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:12:25,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169518761] [2022-12-14 05:12:25,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:12:25,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:12:25,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:12:25,673 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:12:25,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 05:12:25,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:12:25,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 1081 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 05:12:25,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:12:25,844 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 05:12:25,844 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:12:25,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169518761] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:12:25,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:12:25,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 05:12:25,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411780250] [2022-12-14 05:12:25,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:12:25,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:12:25,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:12:25,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:12:25,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:12:25,846 INFO L87 Difference]: Start difference. First operand 181873 states and 271311 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 05:12:32,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:12:32,349 INFO L93 Difference]: Finished difference Result 313581 states and 459722 transitions. [2022-12-14 05:12:32,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:12:32,350 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 178 [2022-12-14 05:12:32,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:12:33,012 INFO L225 Difference]: With dead ends: 313581 [2022-12-14 05:12:33,013 INFO L226 Difference]: Without dead ends: 222827 [2022-12-14 05:12:33,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:12:33,176 INFO L413 NwaCegarLoop]: 3275 mSDtfsCounter, 3466 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3466 SdHoareTripleChecker+Valid, 3329 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:12:33,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3466 Valid, 3329 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:12:33,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222827 states. [2022-12-14 05:12:39,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222827 to 222827. [2022-12-14 05:12:39,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222827 states, 196201 states have (on average 1.4558386552565992) internal successors, (285637), 196715 states have internal predecessors, (285637), 17154 states have call successors, (17154), 9470 states have call predecessors, (17154), 9470 states have return successors, (17154), 16642 states have call predecessors, (17154), 17154 states have call successors, (17154) [2022-12-14 05:12:40,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222827 states to 222827 states and 319945 transitions. [2022-12-14 05:12:40,430 INFO L78 Accepts]: Start accepts. Automaton has 222827 states and 319945 transitions. Word has length 178 [2022-12-14 05:12:40,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:12:40,431 INFO L495 AbstractCegarLoop]: Abstraction has 222827 states and 319945 transitions. [2022-12-14 05:12:40,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 05:12:40,431 INFO L276 IsEmpty]: Start isEmpty. Operand 222827 states and 319945 transitions. [2022-12-14 05:12:40,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-12-14 05:12:40,764 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:12:40,764 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 05:12:40,770 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 05:12:40,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 05:12:40,966 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:12:40,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:12:40,967 INFO L85 PathProgramCache]: Analyzing trace with hash -24025129, now seen corresponding path program 1 times [2022-12-14 05:12:40,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:12:40,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507653506] [2022-12-14 05:12:40,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:12:40,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:12:40,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:12:41,173 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 10 proven. 59 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 05:12:41,173 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:12:41,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507653506] [2022-12-14 05:12:41,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507653506] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:12:41,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704419853] [2022-12-14 05:12:41,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:12:41,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:12:41,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:12:41,175 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:12:41,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 05:12:41,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:12:41,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 1084 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 05:12:41,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:12:41,352 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 05:12:41,352 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:12:41,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704419853] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:12:41,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:12:41,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 05:12:41,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028951734] [2022-12-14 05:12:41,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:12:41,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:12:41,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:12:41,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:12:41,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:12:41,353 INFO L87 Difference]: Start difference. First operand 222827 states and 319945 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 05:12:51,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:12:51,134 INFO L93 Difference]: Finished difference Result 531045 states and 775872 transitions. [2022-12-14 05:12:51,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:12:51,135 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 178 [2022-12-14 05:12:51,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:12:52,125 INFO L225 Difference]: With dead ends: 531045 [2022-12-14 05:12:52,125 INFO L226 Difference]: Without dead ends: 309865 [2022-12-14 05:12:52,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:12:52,392 INFO L413 NwaCegarLoop]: 3273 mSDtfsCounter, 100 mSDsluCounter, 3246 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 6519 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:12:52,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 6519 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:12:52,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309865 states. [2022-12-14 05:13:01,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309865 to 256115. [2022-12-14 05:13:01,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256115 states, 227949 states have (on average 1.4878108699753014) internal successors, (339145), 228464 states have internal predecessors, (339145), 17924 states have call successors, (17924), 10240 states have call predecessors, (17924), 10240 states have return successors, (17924), 17411 states have call predecessors, (17924), 17924 states have call successors, (17924) [2022-12-14 05:13:02,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256115 states to 256115 states and 374993 transitions. [2022-12-14 05:13:02,053 INFO L78 Accepts]: Start accepts. Automaton has 256115 states and 374993 transitions. Word has length 178 [2022-12-14 05:13:02,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:13:02,054 INFO L495 AbstractCegarLoop]: Abstraction has 256115 states and 374993 transitions. [2022-12-14 05:13:02,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 05:13:02,054 INFO L276 IsEmpty]: Start isEmpty. Operand 256115 states and 374993 transitions. [2022-12-14 05:13:02,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-12-14 05:13:02,612 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:13:02,613 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 05:13:02,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 05:13:02,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 05:13:02,814 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:13:02,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:13:02,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1981670408, now seen corresponding path program 1 times [2022-12-14 05:13:02,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:13:02,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175589670] [2022-12-14 05:13:02,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:13:02,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:13:02,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:13:03,009 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 13 proven. 59 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 05:13:03,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:13:03,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175589670] [2022-12-14 05:13:03,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175589670] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:13:03,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219732468] [2022-12-14 05:13:03,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:13:03,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:13:03,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:13:03,010 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:13:03,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 05:13:03,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:13:03,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 1091 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 05:13:03,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:13:03,186 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 05:13:03,186 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:13:03,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219732468] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:13:03,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:13:03,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-12-14 05:13:03,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763780559] [2022-12-14 05:13:03,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:13:03,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:13:03,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:13:03,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:13:03,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 05:13:03,188 INFO L87 Difference]: Start difference. First operand 256115 states and 374993 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 05:13:19,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:13:19,618 INFO L93 Difference]: Finished difference Result 782457 states and 1140945 transitions. [2022-12-14 05:13:19,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:13:19,618 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 179 [2022-12-14 05:13:19,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:13:21,284 INFO L225 Difference]: With dead ends: 782457 [2022-12-14 05:13:21,285 INFO L226 Difference]: Without dead ends: 527989 [2022-12-14 05:13:21,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-14 05:13:21,649 INFO L413 NwaCegarLoop]: 3451 mSDtfsCounter, 3504 mSDsluCounter, 3598 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3504 SdHoareTripleChecker+Valid, 7049 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 05:13:21,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3504 Valid, 7049 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 05:13:22,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527989 states. [2022-12-14 05:13:39,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527989 to 525931. [2022-12-14 05:13:39,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525931 states, 469099 states have (on average 1.4629726347743226) internal successors, (686279), 471151 states have internal predecessors, (686279), 35329 states have call successors, (35329), 20477 states have call predecessors, (35329), 21501 states have return successors, (42493), 34303 states have call predecessors, (42493), 35329 states have call successors, (42493) [2022-12-14 05:13:41,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525931 states to 525931 states and 764101 transitions. [2022-12-14 05:13:41,686 INFO L78 Accepts]: Start accepts. Automaton has 525931 states and 764101 transitions. Word has length 179 [2022-12-14 05:13:41,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:13:41,687 INFO L495 AbstractCegarLoop]: Abstraction has 525931 states and 764101 transitions. [2022-12-14 05:13:41,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 05:13:41,687 INFO L276 IsEmpty]: Start isEmpty. Operand 525931 states and 764101 transitions. [2022-12-14 05:13:42,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-12-14 05:13:42,751 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:13:42,751 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 05:13:42,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 05:13:42,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:13:42,953 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:13:42,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:13:42,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1152449529, now seen corresponding path program 2 times [2022-12-14 05:13:42,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:13:42,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546901065] [2022-12-14 05:13:42,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:13:42,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:13:43,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:13:43,285 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 13 proven. 60 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-12-14 05:13:43,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:13:43,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546901065] [2022-12-14 05:13:43,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546901065] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:13:43,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029249720] [2022-12-14 05:13:43,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:13:43,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:13:43,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:13:43,286 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:13:43,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 05:13:43,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 05:13:43,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:13:43,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 05:13:43,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:13:43,484 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 05:13:43,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:13:43,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029249720] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:13:43,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:13:43,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 05:13:43,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403719400] [2022-12-14 05:13:43,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:13:43,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:13:43,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:13:43,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:13:43,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:13:43,486 INFO L87 Difference]: Start difference. First operand 525931 states and 764101 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 05:14:09,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:14:09,245 INFO L93 Difference]: Finished difference Result 1051233 states and 1555113 transitions. [2022-12-14 05:14:09,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:14:09,246 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 179 [2022-12-14 05:14:09,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:14:11,549 INFO L225 Difference]: With dead ends: 1051233 [2022-12-14 05:14:11,549 INFO L226 Difference]: Without dead ends: 773221 [2022-12-14 05:14:12,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:14:12,257 INFO L413 NwaCegarLoop]: 3285 mSDtfsCounter, 3451 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3451 SdHoareTripleChecker+Valid, 3464 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:14:12,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3451 Valid, 3464 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:14:12,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773221 states. [2022-12-14 05:14:40,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773221 to 769119. [2022-12-14 05:14:41,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769119 states, 684647 states have (on average 1.463041538194135) internal successors, (1001667), 687211 states have internal predecessors, (1001667), 52733 states have call successors, (52733), 30713 states have call predecessors, (52733), 31737 states have return successors, (69621), 51195 states have call predecessors, (69621), 52733 states have call successors, (69621) [2022-12-14 05:14:44,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769119 states to 769119 states and 1124021 transitions. [2022-12-14 05:14:44,330 INFO L78 Accepts]: Start accepts. Automaton has 769119 states and 1124021 transitions. Word has length 179 [2022-12-14 05:14:44,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:14:44,331 INFO L495 AbstractCegarLoop]: Abstraction has 769119 states and 1124021 transitions. [2022-12-14 05:14:44,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 05:14:44,331 INFO L276 IsEmpty]: Start isEmpty. Operand 769119 states and 1124021 transitions. [2022-12-14 05:14:46,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-12-14 05:14:46,131 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:14:46,131 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 05:14:46,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-14 05:14:46,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 05:14:46,332 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:14:46,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:14:46,334 INFO L85 PathProgramCache]: Analyzing trace with hash -380597045, now seen corresponding path program 3 times [2022-12-14 05:14:46,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:14:46,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748302215] [2022-12-14 05:14:46,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:14:46,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:14:46,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:14:46,717 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 13 proven. 60 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-12-14 05:14:46,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:14:46,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748302215] [2022-12-14 05:14:46,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748302215] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:14:46,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306431414] [2022-12-14 05:14:46,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:14:46,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:14:46,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:14:46,719 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:14:46,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 05:14:46,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:14:46,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:14:46,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 05:14:46,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:14:46,919 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 05:14:46,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:14:46,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306431414] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:14:46,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:14:46,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 05:14:46,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173124677] [2022-12-14 05:14:46,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:14:46,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:14:46,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:14:46,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:14:46,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:14:46,921 INFO L87 Difference]: Start difference. First operand 769119 states and 1124021 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 05:15:18,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:15:18,673 INFO L93 Difference]: Finished difference Result 1370169 states and 1988480 transitions. [2022-12-14 05:15:18,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:15:18,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 179 [2022-12-14 05:15:18,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:15:21,508 INFO L225 Difference]: With dead ends: 1370169 [2022-12-14 05:15:21,508 INFO L226 Difference]: Without dead ends: 845897 [2022-12-14 05:15:22,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:15:22,510 INFO L413 NwaCegarLoop]: 3277 mSDtfsCounter, 3413 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3413 SdHoareTripleChecker+Valid, 3338 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:15:22,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3413 Valid, 3338 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:15:23,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845897 states. [2022-12-14 05:15:54,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845897 to 844617. [2022-12-14 05:15:55,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844617 states, 755809 states have (on average 1.4357026709128893) internal successors, (1085117), 756837 states have internal predecessors, (1085117), 54259 states have call successors, (54259), 35311 states have call predecessors, (54259), 34547 states have return successors, (66541), 52469 states have call predecessors, (66541), 54259 states have call successors, (66541) [2022-12-14 05:15:57,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844617 states to 844617 states and 1205917 transitions. [2022-12-14 05:15:57,995 INFO L78 Accepts]: Start accepts. Automaton has 844617 states and 1205917 transitions. Word has length 179 [2022-12-14 05:15:57,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:15:57,996 INFO L495 AbstractCegarLoop]: Abstraction has 844617 states and 1205917 transitions. [2022-12-14 05:15:57,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 05:15:57,996 INFO L276 IsEmpty]: Start isEmpty. Operand 844617 states and 1205917 transitions. [2022-12-14 05:15:59,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-12-14 05:15:59,896 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:15:59,897 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 05:15:59,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 05:16:00,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 05:16:00,099 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:16:00,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:16:00,100 INFO L85 PathProgramCache]: Analyzing trace with hash -865771764, now seen corresponding path program 1 times [2022-12-14 05:16:00,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:16:00,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340792855] [2022-12-14 05:16:00,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:16:00,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:16:00,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:16:00,296 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 13 proven. 61 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 05:16:00,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:16:00,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340792855] [2022-12-14 05:16:00,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340792855] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:16:00,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244913124] [2022-12-14 05:16:00,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:16:00,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:16:00,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:16:00,298 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:16:00,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8936f1bb-8a62-4b51-b5ea-e230ce23329f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 05:16:00,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:16:00,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 1085 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 05:16:00,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:16:00,437 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-12-14 05:16:00,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:16:00,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244913124] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:16:00,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:16:00,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 05:16:00,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652953048] [2022-12-14 05:16:00,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:16:00,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:16:00,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:16:00,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:16:00,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:16:00,439 INFO L87 Difference]: Start difference. First operand 844617 states and 1205917 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10)